Attachment 359424 Details for Bug 193557 – proposed patch.

[patch] proposed patch.

bug-193557.patch (text/plain), 119.38 KB, created by Mark Lam on 2019-01-17 16:41:42 PST

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Creator: Mark Lam

Created: 2019-01-17 16:41:42 PST

Size: 119.38 KB

patch

obsolete

>Index: Source/JavaScriptCore/ChangeLog
>===================================================================
>--- Source/JavaScriptCore/ChangeLog	(revision 240135)
>+++ Source/JavaScriptCore/ChangeLog	(working copy)
>@@ -1,3 +1,141 @@
>+2019-01-17  Mark Lam  <mark.lam@apple.com>
>+
>+        Audit bytecode fields and ensure that LLInt instructions for accessing them are appropriate.
>+        https://bugs.webkit.org/show_bug.cgi?id=193557
>+        <rdar://problem/47369125>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        1. Rename some bytecode fields so that it's easier to discern whether the LLInt
>+           is accessing them the right way:
>+           - distinguish between targetVirtualRegister and targetLabel.
>+           - name all StructureID fields as structureID (oldStructureID, newStructureID)
>+             instead of structure (oldStructure, newStructure).
>+
>+        2. Use bitwise_cast in struct Fits when sizeof(T) == size.
>+           This prevents potential undefined behavior issues arising from doing
>+           assignments with reinterpret_cast'ed pointers.
>+
>+        3. Make Special::Pointer an unsigned type (previously int).
>+           Make ResolveType an unsigned type (previously int).
>+
>+        4. In LowLevelInterpreter*.asm:
>+
>+           - rename the op macro argument to opcodeName or opcodeStruct respectively.
>+             This makes it clearer which argument type the macro is working with.
>+
>+           - rename the name macro argument to opcodeName.
>+
>+           - fix operator types to match the field type being accessed.  The following
>+             may have resulted in bugs before:
>+
>+             1. The following should be read with getu() instead of get() because they
>+                are unsigned ints:
>+                    OpSwitchImm::m_tableIndex
>+                    OpSwitchChar::m_tableIndex
>+                    OpGetFromArguments::m_index
>+                    OpPutToArguments::m_index
>+                    OpGetRestLength::m_numParametersToSkip
>+
>+                OpJneqPtr::m_specialPointer should also be read with getu() though this
>+                wasn't a bug because it was previously an int by default, and is only
>+                changed to an unsigned int in this patch.
>+
>+             2.The following should be read with loadi (not loadp) because they are of
>+               unsigned type (not a pointer):
>+                    OpResolveScope::Metadata::m_resolveType
>+                    CodeBlock::m_numParameters (see prepareForTailCall)
>+
>+             3. OpPutToScope::Metadata::m_operand should be read with loadp (not loadis)
>+                because it is a uintptr_t.
>+
>+             4. The following should be read with loadi (not loadis) because they are
>+                unsigned ints:
>+                    OpNegate::Metadata::m_arithProfile + ArithProfile::m_bits
>+                    OpPutById::Metadata::m_oldStructureID
>+                    OpPutToScope::Metadata::m_getPutInfo + GetPutInfo::m_operand
>+
>+                These may not have manifested in bugs because the operations that follow
>+                the load are 32-bit instructions which ignore the high word.
>+
>+        5. Give class GetPutInfo a default constructor so that we can use bitwise_cast
>+           on it.  Also befriend LLIntOffsetsExtractor so that we can take the offset of
>+           m_operand in it.
>+
>+        * bytecode/ArithProfile.h:
>+        * bytecode/BytecodeList.rb:
>+        * bytecode/BytecodeUseDef.h:
>+        (JSC::computeUsesForBytecodeOffset):
>+        (JSC::computeDefsForBytecodeOffset):
>+        * bytecode/CodeBlock.cpp:
>+        (JSC::CodeBlock::propagateTransitions):
>+        (JSC::CodeBlock::finalizeLLIntInlineCaches):
>+        * bytecode/Fits.h:
>+        * bytecode/GetByIdMetadata.h:
>+        * bytecode/GetByIdStatus.cpp:
>+        (JSC::GetByIdStatus::computeFromLLInt):
>+        * bytecode/LLIntPrototypeLoadAdaptiveStructureWatchpoint.cpp:
>+        (JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint::clearLLIntGetByIdCache):
>+        * bytecode/PreciseJumpTargetsInlines.h:
>+        (JSC::jumpTargetForInstruction):
>+        (JSC::updateStoredJumpTargetsForInstruction):
>+        * bytecode/PutByIdStatus.cpp:
>+        (JSC::PutByIdStatus::computeFromLLInt):
>+        * bytecode/SpecialPointer.h:
>+        * bytecompiler/BytecodeGenerator.cpp:
>+        (JSC::Label::setLocation):
>+        * dfg/DFGByteCodeParser.cpp:
>+        (JSC::DFG::ByteCodeParser::parseBlock):
>+        * jit/JITArithmetic.cpp:
>+        (JSC::JIT::emit_compareAndJump):
>+        (JSC::JIT::emit_compareUnsignedAndJump):
>+        (JSC::JIT::emit_compareAndJumpSlow):
>+        * jit/JITArithmetic32_64.cpp:
>+        (JSC::JIT::emit_compareAndJump):
>+        (JSC::JIT::emit_compareUnsignedAndJump):
>+        (JSC::JIT::emit_compareAndJumpSlow):
>+        (JSC::JIT::emitBinaryDoubleOp):
>+        * jit/JITOpcodes.cpp:
>+        (JSC::JIT::emit_op_jmp):
>+        (JSC::JIT::emit_op_jfalse):
>+        (JSC::JIT::emit_op_jeq_null):
>+        (JSC::JIT::emit_op_jneq_null):
>+        (JSC::JIT::emit_op_jneq_ptr):
>+        (JSC::JIT::emit_op_jeq):
>+        (JSC::JIT::emit_op_jtrue):
>+        (JSC::JIT::emit_op_jneq):
>+        (JSC::JIT::compileOpStrictEqJump):
>+        (JSC::JIT::emitSlow_op_jstricteq):
>+        (JSC::JIT::emitSlow_op_jnstricteq):
>+        (JSC::JIT::emit_op_check_tdz):
>+        (JSC::JIT::emitSlow_op_jeq):
>+        (JSC::JIT::emitSlow_op_jneq):
>+        (JSC::JIT::emit_op_profile_type):
>+        * jit/JITOpcodes32_64.cpp:
>+        (JSC::JIT::emit_op_jmp):
>+        (JSC::JIT::emit_op_jfalse):
>+        (JSC::JIT::emit_op_jtrue):
>+        (JSC::JIT::emit_op_jeq_null):
>+        (JSC::JIT::emit_op_jneq_null):
>+        (JSC::JIT::emit_op_jneq_ptr):
>+        (JSC::JIT::emit_op_jeq):
>+        (JSC::JIT::emitSlow_op_jeq):
>+        (JSC::JIT::emit_op_jneq):
>+        (JSC::JIT::emitSlow_op_jneq):
>+        (JSC::JIT::compileOpStrictEqJump):
>+        (JSC::JIT::emitSlow_op_jstricteq):
>+        (JSC::JIT::emitSlow_op_jnstricteq):
>+        (JSC::JIT::emit_op_check_tdz):
>+        (JSC::JIT::emit_op_profile_type):
>+        * llint/LLIntSlowPaths.cpp:
>+        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
>+        (JSC::LLInt::setupGetByIdPrototypeCache):
>+        * llint/LowLevelInterpreter.asm:
>+        * llint/LowLevelInterpreter32_64.asm:
>+        * llint/LowLevelInterpreter64.asm:
>+        * runtime/CommonSlowPaths.cpp:
>+        * runtime/GetPutInfo.h:
>+
> 2019-01-17  Jer Noble  <jer.noble@apple.com>
> 
>         SDK_VARIANT build destinations should be separate from non-SDK_VARIANT builds
>Index: Source/JavaScriptCore/bytecode/ArithProfile.h
>===================================================================
>--- Source/JavaScriptCore/bytecode/ArithProfile.h	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/ArithProfile.h	(working copy)
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2016 Apple Inc. All rights reserved.
>+ * Copyright (C) 2016-2019 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -306,6 +306,8 @@ private:
>     void setBit(int mask) { m_bits |= mask; }
> 
>     uint32_t m_bits { 0 }; // We take care to update m_bits only in a single operation. We don't ever store an inconsistent bit representation to it.
>+
>+    friend class JSC::LLIntOffsetsExtractor;
> };
> 
> } // namespace JSC
>Index: Source/JavaScriptCore/bytecode/BytecodeList.rb
>===================================================================
>--- Source/JavaScriptCore/bytecode/BytecodeList.rb	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/BytecodeList.rb	(working copy)
>@@ -1,4 +1,4 @@
>-# Copyright (C) 2018 Apple Inc. All rights reserved.
>+# Copyright (C) 2018-2019 Apple Inc. All rights reserved.
> #
> # Redistribution and use in source and binary forms, with or without
> # modification, are permitted provided that the following conditions
>@@ -142,7 +142,7 @@ op :to_this,
> 
> op :check_tdz,
>     args: {
>-        target: VirtualRegister,
>+        targetVirtualRegister: VirtualRegister,
>     }
> 
> op :new_object,
>@@ -449,7 +449,7 @@ op :get_by_id_direct,
>     },
>     metadata: {
>         profile: ValueProfile, # not used in llint
>-        structure: StructureID,
>+        structureID: StructureID,
>         offset: unsigned,
>     }
> 
>@@ -471,9 +471,9 @@ op :put_by_id,
>         flags: PutByIdFlags,
>     },
>     metadata: {
>-        oldStructure: StructureID,
>+        oldStructureID: StructureID,
>         offset: unsigned,
>-        newStructure: StructureID,
>+        newStructureID: StructureID,
>         structureChain: WriteBarrierBase[StructureChain],
>     }
> 
>@@ -598,38 +598,38 @@ op :define_accessor_property,
> 
> op :jmp,
>     args: {
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     }
> 
> op :jtrue,
>     args: {
>         condition: VirtualRegister,
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     }
> 
> op :jfalse,
>     args: {
>         condition: VirtualRegister,
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     }
> 
> op :jeq_null,
>     args: {
>         value: VirtualRegister,
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     }
> 
> op :jneq_null,
>     args: {
>         value: VirtualRegister,
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     }
> 
> op :jneq_ptr,
>     args: {
>         value: VirtualRegister,
>         specialPointer: Special::Pointer,
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     },
>     metadata: {
>         hasJumped: bool,
>@@ -655,7 +655,7 @@ op_group :BinaryJmp,
>     args: {
>         lhs: VirtualRegister,
>         rhs: VirtualRegister,
>-        target: BoundLabel,
>+        targetLabel: BoundLabel,
>     }
> 
> op :loop_hint
>@@ -965,7 +965,7 @@ op :end,
> 
> op :profile_type,
>     args: {
>-        target: VirtualRegister,
>+        targetVirtualRegister: VirtualRegister,
>         symbolTableOrScopeDepth: int,
>         flag: ProfileTypeBytecodeFlag,
>         identifier?: unsigned,
>Index: Source/JavaScriptCore/bytecode/BytecodeUseDef.h
>===================================================================
>--- Source/JavaScriptCore/bytecode/BytecodeUseDef.h	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/BytecodeUseDef.h	(working copy)
>@@ -94,9 +94,9 @@ void computeUsesForBytecodeOffset(Block*
> 
>     USES(OpGetScope, dst)
>     USES(OpToThis, srcDst)
>-    USES(OpCheckTdz, target)
>+    USES(OpCheckTdz, targetVirtualRegister)
>     USES(OpIdentityWithProfile, srcDst)
>-    USES(OpProfileType, target);
>+    USES(OpProfileType, targetVirtualRegister);
>     USES(OpThrow, value)
>     USES(OpThrowStaticError, message)
>     USES(OpEnd, value)
>@@ -448,7 +448,7 @@ void computeDefsForBytecodeOffset(Block*
>     DEFS(OpMov, dst)
>     DEFS(OpNewObject, dst)
>     DEFS(OpToThis, srcDst)
>-    DEFS(OpCheckTdz, target)
>+    DEFS(OpCheckTdz, targetVirtualRegister)
>     DEFS(OpGetScope, dst)
>     DEFS(OpCreateDirectArguments, dst)
>     DEFS(OpCreateScopedArguments, dst)
>Index: Source/JavaScriptCore/bytecode/CodeBlock.cpp
>===================================================================
>--- Source/JavaScriptCore/bytecode/CodeBlock.cpp	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/CodeBlock.cpp	(working copy)
>@@ -1095,8 +1095,8 @@ void CodeBlock::propagateTransitions(con
>             auto instruction = m_instructions->at(propertyAccessInstructions[i]);
>             if (instruction->is<OpPutById>()) {
>                 auto& metadata = instruction->as<OpPutById>().metadata(this);
>-                StructureID oldStructureID = metadata.m_oldStructure;
>-                StructureID newStructureID = metadata.m_newStructure;
>+                StructureID oldStructureID = metadata.m_oldStructureID;
>+                StructureID newStructureID = metadata.m_newStructureID;
>                 if (!oldStructureID || !newStructureID)
>                     continue;
>                 Structure* oldStructure =
>@@ -1226,7 +1226,7 @@ void CodeBlock::finalizeLLIntInlineCache
>             auto& metadata = curInstruction->as<OpGetById>().metadata(this);
>             if (metadata.m_mode != GetByIdMode::Default)
>                 break;
>-            StructureID oldStructureID = metadata.m_modeMetadata.defaultMode.structure;
>+            StructureID oldStructureID = metadata.m_modeMetadata.defaultMode.structureID;
>             if (!oldStructureID || Heap::isMarked(vm.heap.structureIDTable().get(oldStructureID)))
>                 break;
>             if (Options::verboseOSR())
>@@ -1236,19 +1236,19 @@ void CodeBlock::finalizeLLIntInlineCache
>         }
>         case op_get_by_id_direct: {
>             auto& metadata = curInstruction->as<OpGetByIdDirect>().metadata(this);
>-            StructureID oldStructureID = metadata.m_structure;
>+            StructureID oldStructureID = metadata.m_structureID;
>             if (!oldStructureID || Heap::isMarked(vm.heap.structureIDTable().get(oldStructureID)))
>                 break;
>             if (Options::verboseOSR())
>                 dataLogF("Clearing LLInt property access.\n");
>-            metadata.m_structure = 0;
>+            metadata.m_structureID = 0;
>             metadata.m_offset = 0;
>             break;
>         }
>         case op_put_by_id: {
>             auto& metadata = curInstruction->as<OpPutById>().metadata(this);
>-            StructureID oldStructureID = metadata.m_oldStructure;
>-            StructureID newStructureID = metadata.m_newStructure;
>+            StructureID oldStructureID = metadata.m_oldStructureID;
>+            StructureID newStructureID = metadata.m_newStructureID;
>             StructureChain* chain = metadata.m_structureChain.get();
>             if ((!oldStructureID || Heap::isMarked(vm.heap.structureIDTable().get(oldStructureID)))
>                 && (!newStructureID || Heap::isMarked(vm.heap.structureIDTable().get(newStructureID)))
>@@ -1256,9 +1256,9 @@ void CodeBlock::finalizeLLIntInlineCache
>                 break;
>             if (Options::verboseOSR())
>                 dataLogF("Clearing LLInt put transition.\n");
>-            metadata.m_oldStructure = 0;
>+            metadata.m_oldStructureID = 0;
>             metadata.m_offset = 0;
>-            metadata.m_newStructure = 0;
>+            metadata.m_newStructureID = 0;
>             metadata.m_structureChain.clear();
>             break;
>         }
>Index: Source/JavaScriptCore/bytecode/Fits.h
>===================================================================
>--- Source/JavaScriptCore/bytecode/Fits.h	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/Fits.h	(working copy)
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -52,10 +52,10 @@ template<typename T, OpcodeSize size>
> struct Fits<T, size, std::enable_if_t<sizeof(T) == size, std::true_type>> {
>     static bool check(T) { return true; }
> 
>-    static typename TypeBySize<size>::type convert(T t) { return *reinterpret_cast<typename TypeBySize<size>::type*>(&t); }
>+    static typename TypeBySize<size>::type convert(T t) { return bitwise_cast<typename TypeBySize<size>::type>(t); }
> 
>     template<class T1 = T, OpcodeSize size1 = size, typename = std::enable_if_t<!std::is_same<T1, typename TypeBySize<size1>::type>::value, std::true_type>>
>-    static T1 convert(typename TypeBySize<size1>::type t) { return *reinterpret_cast<T1*>(&t); }
>+    static T1 convert(typename TypeBySize<size1>::type t) { return bitwise_cast<T1>(t); }
> };
> 
> template<typename T, OpcodeSize size>
>Index: Source/JavaScriptCore/bytecode/GetByIdMetadata.h
>===================================================================
>--- Source/JavaScriptCore/bytecode/GetByIdMetadata.h	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/GetByIdMetadata.h	(working copy)
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -39,16 +39,16 @@ union GetByIdModeMetadata {
>     { }
> 
>     struct Default {
>-        StructureID structure;
>+        StructureID structureID;
>         PropertyOffset cachedOffset;
>     } defaultMode;
> 
>     struct Unset {
>-        StructureID structure;
>+        StructureID structureID;
>     } unsetMode;
> 
>     struct ProtoLoad {
>-        StructureID structure;
>+        StructureID structureID;
>         PropertyOffset cachedOffset;
>         JSObject* cachedSlot;
>     } protoLoadMode;
>Index: Source/JavaScriptCore/bytecode/GetByIdStatus.cpp
>===================================================================
>--- Source/JavaScriptCore/bytecode/GetByIdStatus.cpp	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/GetByIdStatus.cpp	(working copy)
>@@ -66,11 +66,11 @@ GetByIdStatus GetByIdStatus::computeFrom
>         // https://bugs.webkit.org/show_bug.cgi?id=158039
>         if (metadata.m_mode != GetByIdMode::Default)
>             return GetByIdStatus(NoInformation, false);
>-        structureID = metadata.m_modeMetadata.defaultMode.structure;
>+        structureID = metadata.m_modeMetadata.defaultMode.structureID;
>         break;
>     }
>     case op_get_by_id_direct:
>-        structureID = instruction->as<OpGetByIdDirect>().metadata(profiledBlock).m_structure;
>+        structureID = instruction->as<OpGetByIdDirect>().metadata(profiledBlock).m_structureID;
>         break;
>     case op_try_get_by_id: {
>         // FIXME: We should not just bail if we see a try_get_by_id.
>Index: Source/JavaScriptCore/bytecode/LLIntPrototypeLoadAdaptiveStructureWatchpoint.cpp
>===================================================================
>--- Source/JavaScriptCore/bytecode/LLIntPrototypeLoadAdaptiveStructureWatchpoint.cpp	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/LLIntPrototypeLoadAdaptiveStructureWatchpoint.cpp	(working copy)
>@@ -61,7 +61,7 @@ void LLIntPrototypeLoadAdaptiveStructure
> {
>     metadata.m_mode = GetByIdMode::Default;
>     metadata.m_modeMetadata.defaultMode.cachedOffset = 0;
>-    metadata.m_modeMetadata.defaultMode.structure = 0;
>+    metadata.m_modeMetadata.defaultMode.structureID = 0;
> }
> 
> 
>Index: Source/JavaScriptCore/bytecode/PreciseJumpTargetsInlines.h
>===================================================================
>--- Source/JavaScriptCore/bytecode/PreciseJumpTargetsInlines.h	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/PreciseJumpTargetsInlines.h	(working copy)
>@@ -108,7 +108,7 @@ template<typename Op, typename Block>
> inline int jumpTargetForInstruction(Block&& codeBlock, const InstructionStream::Ref& instruction)
> {
>     auto bytecode = instruction->as<Op>();
>-    return jumpTargetForInstruction(codeBlock, instruction, bytecode.m_target);
>+    return jumpTargetForInstruction(codeBlock, instruction, bytecode.m_targetLabel);
> }
> 
> template<typename Block, typename Function>
>@@ -139,7 +139,7 @@ inline void updateStoredJumpTargetsForIn
>     case __op::opcodeID: { \
>         int32_t target = jumpTargetForInstruction<__op>(codeBlockOrHashMap, instruction); \
>         int32_t newTarget = function(target); \
>-        instruction->cast<__op>()->setTarget(BoundLabel(newTarget), [&]() { \
>+        instruction->cast<__op>()->setTargetLabel(BoundLabel(newTarget), [&]() { \
>             codeBlock->addOutOfLineJumpTarget(finalOffset + instruction.offset(), newTarget); \
>             return BoundLabel(); \
>         }); \
>Index: Source/JavaScriptCore/bytecode/PutByIdStatus.cpp
>===================================================================
>--- Source/JavaScriptCore/bytecode/PutByIdStatus.cpp	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/PutByIdStatus.cpp	(working copy)
>@@ -55,13 +55,13 @@ PutByIdStatus PutByIdStatus::computeFrom
>     auto bytecode = instruction->as<OpPutById>();
>     auto& metadata = bytecode.metadata(profiledBlock);
> 
>-    StructureID structureID = metadata.m_oldStructure;
>+    StructureID structureID = metadata.m_oldStructureID;
>     if (!structureID)
>         return PutByIdStatus(NoInformation);
>     
>     Structure* structure = vm.heap.structureIDTable().get(structureID);
> 
>-    StructureID newStructureID = metadata.m_newStructure;
>+    StructureID newStructureID = metadata.m_newStructureID;
>     if (!newStructureID) {
>         PropertyOffset offset = structure->getConcurrently(uid);
>         if (!isValidOffset(offset))
>Index: Source/JavaScriptCore/bytecode/SpecialPointer.h
>===================================================================
>--- Source/JavaScriptCore/bytecode/SpecialPointer.h	(revision 240135)
>+++ Source/JavaScriptCore/bytecode/SpecialPointer.h	(working copy)
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2012 Apple Inc. All rights reserved.
>+ * Copyright (C) 2012-2019 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -31,7 +31,7 @@ class CodeBlock;
> class JSGlobalObject;
> 
> namespace Special {
>-enum Pointer {
>+enum Pointer : unsigned {
>     CallFunction,
>     ApplyFunction,
>     ObjectConstructor,
>Index: Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
>===================================================================
>--- Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp	(revision 240135)
>+++ Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp	(working copy)
>@@ -102,7 +102,7 @@ void Label::setLocation(BytecodeGenerato
> 
> #define CASE(__op) \
>     case __op::opcodeID:  \
>-        instruction->cast<__op>()->setTarget(BoundLabel(target), [&]() { \
>+        instruction->cast<__op>()->setTargetLabel(BoundLabel(target), [&]() { \
>             generator.m_codeBlock->addOutOfLineJumpTarget(instruction.offset(), target); \
>             return BoundLabel(); \
>         }); \
>Index: Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp
>===================================================================
>--- Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp	(revision 240135)
>+++ Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp	(working copy)
>@@ -5090,7 +5090,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_check_tdz: {
>             auto bytecode = currentInstruction->as<OpCheckTdz>();
>-            addToGraph(CheckNotEmpty, get(bytecode.m_target));
>+            addToGraph(CheckNotEmpty, get(bytecode.m_targetVirtualRegister));
>             NEXT_OPCODE(op_check_tdz);
>         }
> 
>@@ -5598,7 +5598,7 @@ void ByteCodeParser::parseBlock(unsigned
>         case op_profile_type: {
>             auto bytecode = currentInstruction->as<OpProfileType>();
>             auto& metadata = bytecode.metadata(codeBlock);
>-            Node* valueToProfile = get(bytecode.m_target);
>+            Node* valueToProfile = get(bytecode.m_targetVirtualRegister);
>             addToGraph(ProfileType, OpInfo(metadata.m_typeLocation), valueToProfile);
>             NEXT_OPCODE(op_profile_type);
>         }
>@@ -5615,7 +5615,7 @@ void ByteCodeParser::parseBlock(unsigned
>         case op_jmp: {
>             ASSERT(!m_currentBlock->terminal());
>             auto bytecode = currentInstruction->as<OpJmp>();
>-            int relativeOffset = jumpTarget(bytecode.m_target);
>+            int relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             addToGraph(Jump, OpInfo(m_currentIndex + relativeOffset));
>             if (relativeOffset <= 0)
>                 flushForTerminal();
>@@ -5624,7 +5624,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jtrue: {
>             auto bytecode = currentInstruction->as<OpJtrue>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* condition = get(bytecode.m_condition);
>             addToGraph(Branch, OpInfo(branchData(m_currentIndex + relativeOffset, m_currentIndex + currentInstruction->size())), condition);
>             LAST_OPCODE(op_jtrue);
>@@ -5632,7 +5632,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jfalse: {
>             auto bytecode = currentInstruction->as<OpJfalse>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* condition = get(bytecode.m_condition);
>             addToGraph(Branch, OpInfo(branchData(m_currentIndex + currentInstruction->size(), m_currentIndex + relativeOffset)), condition);
>             LAST_OPCODE(op_jfalse);
>@@ -5640,7 +5640,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jeq_null: {
>             auto bytecode = currentInstruction->as<OpJeqNull>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* value = get(bytecode.m_value);
>             Node* nullConstant = addToGraph(JSConstant, OpInfo(m_constantNull));
>             Node* condition = addToGraph(CompareEq, value, nullConstant);
>@@ -5650,7 +5650,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jneq_null: {
>             auto bytecode = currentInstruction->as<OpJneqNull>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* value = get(bytecode.m_value);
>             Node* nullConstant = addToGraph(JSConstant, OpInfo(m_constantNull));
>             Node* condition = addToGraph(CompareEq, value, nullConstant);
>@@ -5660,7 +5660,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jless: {
>             auto bytecode = currentInstruction->as<OpJless>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareLess, op1, op2);
>@@ -5670,7 +5670,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jlesseq: {
>             auto bytecode = currentInstruction->as<OpJlesseq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareLessEq, op1, op2);
>@@ -5680,7 +5680,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jgreater: {
>             auto bytecode = currentInstruction->as<OpJgreater>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareGreater, op1, op2);
>@@ -5690,7 +5690,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jgreatereq: {
>             auto bytecode = currentInstruction->as<OpJgreatereq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareGreaterEq, op1, op2);
>@@ -5700,7 +5700,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jeq: {
>             auto bytecode = currentInstruction->as<OpJeq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareEq, op1, op2);
>@@ -5710,7 +5710,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jstricteq: {
>             auto bytecode = currentInstruction->as<OpJstricteq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareStrictEq, op1, op2);
>@@ -5720,7 +5720,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jnless: {
>             auto bytecode = currentInstruction->as<OpJnless>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareLess, op1, op2);
>@@ -5730,7 +5730,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jnlesseq: {
>             auto bytecode = currentInstruction->as<OpJnlesseq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareLessEq, op1, op2);
>@@ -5740,7 +5740,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jngreater: {
>             auto bytecode = currentInstruction->as<OpJngreater>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareGreater, op1, op2);
>@@ -5750,7 +5750,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jngreatereq: {
>             auto bytecode = currentInstruction->as<OpJngreatereq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareGreaterEq, op1, op2);
>@@ -5760,7 +5760,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jneq: {
>             auto bytecode = currentInstruction->as<OpJneq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareEq, op1, op2);
>@@ -5770,7 +5770,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jnstricteq: {
>             auto bytecode = currentInstruction->as<OpJnstricteq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareStrictEq, op1, op2);
>@@ -5780,7 +5780,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jbelow: {
>             auto bytecode = currentInstruction->as<OpJbelow>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareBelow, op1, op2);
>@@ -5790,7 +5790,7 @@ void ByteCodeParser::parseBlock(unsigned
> 
>         case op_jbeloweq: {
>             auto bytecode = currentInstruction->as<OpJbeloweq>();
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* op1 = get(bytecode.m_lhs);
>             Node* op2 = get(bytecode.m_rhs);
>             Node* condition = addToGraph(CompareBelowEq, op1, op2);
>@@ -6107,7 +6107,7 @@ void ByteCodeParser::parseBlock(unsigned
>             JSCell* actualPointer = static_cast<JSCell*>(
>                 actualPointerFor(m_inlineStackTop->m_codeBlock, specialPointer));
>             FrozenValue* frozenPointer = m_graph.freeze(actualPointer);
>-            unsigned relativeOffset = jumpTarget(bytecode.m_target);
>+            unsigned relativeOffset = jumpTarget(bytecode.m_targetLabel);
>             Node* child = get(bytecode.m_value);
>             if (bytecode.metadata(codeBlock).m_hasJumped) {
>                 Node* condition = addToGraph(CompareEqPtr, OpInfo(frozenPointer), child);
>Index: Source/JavaScriptCore/jit/JITArithmetic32_64.cpp
>===================================================================
>--- Source/JavaScriptCore/jit/JITArithmetic32_64.cpp	(revision 240135)
>+++ Source/JavaScriptCore/jit/JITArithmetic32_64.cpp	(working copy)
>@@ -50,7 +50,7 @@ void JIT::emit_compareAndJump(const Inst
>     auto bytecode = instruction->as<Op>();
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
>-    unsigned target = jumpTarget(instruction, bytecode.m_target);
>+    unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
> 
>     // Character less.
>     if (isOperandConstantChar(op1)) {
>@@ -104,7 +104,7 @@ void JIT::emit_compareUnsignedAndJump(co
>     auto bytecode = instruction->as<Op>();
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
>-    unsigned target = jumpTarget(instruction, bytecode.m_target);
>+    unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
> 
>     if (isOperandConstantInt(op1)) {
>         emitLoad(op2, regT3, regT2);
>@@ -145,7 +145,7 @@ void JIT::emit_compareAndJumpSlow(const 
>     auto bytecode = instruction->as<Op>();
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
>-    unsigned target = jumpTarget(instruction, bytecode.m_target);
>+    unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
> 
>     linkAllSlowCases(iter);
> 
>@@ -199,7 +199,7 @@ void JIT::emitBinaryDoubleOp(const Instr
> 
>     auto bytecode = instruction->as<Op>();
>     int opcodeID = Op::opcodeID;
>-    int target = jumpTarget(instruction, bytecode.m_target);
>+    int target = jumpTarget(instruction, bytecode.m_targetLabel);
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
> 
>Index: Source/JavaScriptCore/jit/JITArithmetic.cpp
>===================================================================
>--- Source/JavaScriptCore/jit/JITArithmetic.cpp	(revision 240135)
>+++ Source/JavaScriptCore/jit/JITArithmetic.cpp	(working copy)
>@@ -178,7 +178,7 @@ void JIT::emit_compareAndJump(const Inst
>     auto bytecode = instruction->as<Op>();
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
>-    unsigned target = jumpTarget(instruction, bytecode.m_target);
>+    unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
>     if (isOperandConstantChar(op1)) {
>         emitGetVirtualRegister(op2, regT0);
>         addSlowCase(branchIfNotCell(regT0));
>@@ -225,7 +225,7 @@ void JIT::emit_compareUnsignedAndJump(co
>     auto bytecode = instruction->as<Op>();
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
>-    unsigned target = jumpTarget(instruction, bytecode.m_target);
>+    unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
>     if (isOperandConstantInt(op2)) {
>         emitGetVirtualRegister(op1, regT0);
>         int32_t op2imm = getOperandConstantInt(op2);
>@@ -269,7 +269,7 @@ void JIT::emit_compareAndJumpSlow(const 
>     auto bytecode = instruction->as<Op>();
>     int op1 = bytecode.m_lhs.offset();
>     int op2 = bytecode.m_rhs.offset();
>-    unsigned target = jumpTarget(instruction, bytecode.m_target);
>+    unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
> 
>     // We generate inline code for the following cases in the slow path:
>     // - floating-point number to constant int immediate
>Index: Source/JavaScriptCore/jit/JITOpcodes32_64.cpp
>===================================================================
>--- Source/JavaScriptCore/jit/JITOpcodes32_64.cpp	(revision 240135)
>+++ Source/JavaScriptCore/jit/JITOpcodes32_64.cpp	(working copy)
>@@ -74,7 +74,7 @@ void JIT::emit_op_end(const Instruction*
> void JIT::emit_op_jmp(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJmp>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     addJump(jump(), target);
> }
> 
>@@ -372,7 +372,7 @@ void JIT::emit_op_jfalse(const Instructi
> {
>     auto bytecode = currentInstruction->as<OpJfalse>();
>     int cond = bytecode.m_condition.offset();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitLoad(cond, regT1, regT0);
> 
>@@ -387,7 +387,7 @@ void JIT::emit_op_jtrue(const Instructio
> {
>     auto bytecode = currentInstruction->as<OpJtrue>();
>     int cond = bytecode.m_condition.offset();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitLoad(cond, regT1, regT0);
>     bool shouldCheckMasqueradesAsUndefined = true;
>@@ -401,7 +401,7 @@ void JIT::emit_op_jeq_null(const Instruc
> {
>     auto bytecode = currentInstruction->as<OpJeqNull>();
>     int src = bytecode.m_value.offset();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitLoad(src, regT1, regT0);
> 
>@@ -427,7 +427,7 @@ void JIT::emit_op_jneq_null(const Instru
> {
>     auto bytecode = currentInstruction->as<OpJneqNull>();
>     int src = bytecode.m_value.offset();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitLoad(src, regT1, regT0);
> 
>@@ -455,7 +455,7 @@ void JIT::emit_op_jneq_ptr(const Instruc
>     auto& metadata = bytecode.metadata(m_codeBlock);
>     int src = bytecode.m_value.offset();
>     Special::Pointer ptr = bytecode.m_specialPointer;
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitLoad(src, regT1, regT0);
>     Jump notCell = branchIfNotCell(regT1);
>@@ -514,7 +514,7 @@ void JIT::emitSlow_op_eq(const Instructi
> void JIT::emit_op_jeq(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJeq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     int src1 = bytecode.m_lhs.offset();
>     int src2 = bytecode.m_rhs.offset();
> 
>@@ -554,7 +554,7 @@ void JIT::compileOpEqJumpSlow(Vector<Slo
> void JIT::emitSlow_op_jeq(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
> {
>     auto bytecode = currentInstruction->as<OpJeq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     compileOpEqJumpSlow(iter, CompileOpEqType::Eq, target);
> }
> 
>@@ -606,7 +606,7 @@ void JIT::emitSlow_op_neq(const Instruct
> void JIT::emit_op_jneq(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJneq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     int src1 = bytecode.m_lhs.offset();
>     int src2 = bytecode.m_rhs.offset();
> 
>@@ -621,7 +621,7 @@ void JIT::emit_op_jneq(const Instruction
> void JIT::emitSlow_op_jneq(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
> {
>     auto bytecode = currentInstruction->as<OpJneq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     compileOpEqJumpSlow(iter, CompileOpEqType::NEq, target);
> }
> 
>@@ -669,7 +669,7 @@ template<typename Op>
> void JIT::compileOpStrictEqJump(const Instruction* currentInstruction, CompileOpStrictEqType type)
> {
>     auto bytecode = currentInstruction->as<Op>();
>-    int target = jumpTarget(currentInstruction, bytecode.m_target);
>+    int target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     int src1 = bytecode.m_lhs.offset();
>     int src2 = bytecode.m_rhs.offset();
> 
>@@ -708,7 +708,7 @@ void JIT::emitSlow_op_jstricteq(const In
>     linkAllSlowCases(iter);
> 
>     auto bytecode = currentInstruction->as<OpJstricteq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     callOperation(operationCompareStrictEq, JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2));
>     emitJumpSlowToHot(branchTest32(NonZero, returnValueGPR), target);
> }
>@@ -718,7 +718,7 @@ void JIT::emitSlow_op_jnstricteq(const I
>     linkAllSlowCases(iter);
> 
>     auto bytecode = currentInstruction->as<OpJnstricteq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     callOperation(operationCompareStrictEq, JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2));
>     emitJumpSlowToHot(branchTest32(Zero, returnValueGPR), target);
> }
>@@ -1058,7 +1058,7 @@ void JIT::emit_op_to_this(const Instruct
> void JIT::emit_op_check_tdz(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpCheckTdz>();
>-    emitLoadTag(bytecode.m_target.offset(), regT0);
>+    emitLoadTag(bytecode.m_targetVirtualRegister.offset(), regT0);
>     addSlowCase(branchIfEmpty(regT0));
> }
> 
>@@ -1271,7 +1271,7 @@ void JIT::emit_op_profile_type(const Ins
>     auto bytecode = currentInstruction->as<OpProfileType>();
>     auto& metadata = bytecode.metadata(m_codeBlock);
>     TypeLocation* cachedTypeLocation = metadata.m_typeLocation;
>-    int valueToProfile = bytecode.m_target.offset();
>+    int valueToProfile = bytecode.m_targetVirtualRegister.offset();
> 
>     // Load payload in T0. Load tag in T3.
>     emitLoadPayload(valueToProfile, regT0);
>Index: Source/JavaScriptCore/jit/JITOpcodes.cpp
>===================================================================
>--- Source/JavaScriptCore/jit/JITOpcodes.cpp	(revision 240135)
>+++ Source/JavaScriptCore/jit/JITOpcodes.cpp	(working copy)
>@@ -86,7 +86,7 @@ void JIT::emit_op_end(const Instruction*
> void JIT::emit_op_jmp(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJmp>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     addJump(jump(), target);
> }
> 
>@@ -383,7 +383,7 @@ void JIT::emit_op_not(const Instruction*
> void JIT::emit_op_jfalse(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJfalse>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     GPRReg value = regT0;
>     GPRReg scratch1 = regT1;
>@@ -398,7 +398,7 @@ void JIT::emit_op_jeq_null(const Instruc
> {
>     auto bytecode = currentInstruction->as<OpJeqNull>();
>     int src = bytecode.m_value.offset();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitGetVirtualRegister(src, regT0);
>     Jump isImmediate = branchIfNotCell(regT0);
>@@ -422,7 +422,7 @@ void JIT::emit_op_jneq_null(const Instru
> {
>     auto bytecode = currentInstruction->as<OpJneqNull>();
>     int src = bytecode.m_value.offset();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     emitGetVirtualRegister(src, regT0);
>     Jump isImmediate = branchIfNotCell(regT0);
>@@ -448,7 +448,7 @@ void JIT::emit_op_jneq_ptr(const Instruc
>     auto& metadata = bytecode.metadata(m_codeBlock);
>     int src = bytecode.m_value.offset();
>     Special::Pointer ptr = bytecode.m_specialPointer;
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     
>     emitGetVirtualRegister(src, regT0);
>     CCallHelpers::Jump equal = branchPtr(Equal, regT0, TrustedImmPtr(actualPointerFor(m_codeBlock, ptr)));
>@@ -470,7 +470,7 @@ void JIT::emit_op_eq(const Instruction* 
> void JIT::emit_op_jeq(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJeq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     emitGetVirtualRegisters(bytecode.m_lhs.offset(), regT0, bytecode.m_rhs.offset(), regT1);
>     emitJumpSlowCaseIfNotInt(regT0, regT1, regT2);
>     addJump(branch32(Equal, regT0, regT1), target);
>@@ -479,7 +479,7 @@ void JIT::emit_op_jeq(const Instruction*
> void JIT::emit_op_jtrue(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJtrue>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
> 
>     GPRReg value = regT0;
>     GPRReg scratch1 = regT1;
>@@ -503,7 +503,7 @@ void JIT::emit_op_neq(const Instruction*
> void JIT::emit_op_jneq(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpJneq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     emitGetVirtualRegisters(bytecode.m_lhs.offset(), regT0, bytecode.m_rhs.offset(), regT1);
>     emitJumpSlowCaseIfNotInt(regT0, regT1, regT2);
>     addJump(branch32(NotEqual, regT0, regT1), target);
>@@ -566,7 +566,7 @@ template<typename Op>
> void JIT::compileOpStrictEqJump(const Instruction* currentInstruction, CompileOpStrictEqType type)
> {
>     auto bytecode = currentInstruction->as<Op>();
>-    int target = jumpTarget(currentInstruction, bytecode.m_target);
>+    int target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     int src1 = bytecode.m_lhs.offset();
>     int src2 = bytecode.m_rhs.offset();
> 
>@@ -607,7 +607,7 @@ void JIT::emitSlow_op_jstricteq(const In
>     linkAllSlowCases(iter);
> 
>     auto bytecode = currentInstruction->as<OpJstricteq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     callOperation(operationCompareStrictEq, regT0, regT1);
>     emitJumpSlowToHot(branchTest32(NonZero, returnValueGPR), target);
> }
>@@ -617,7 +617,7 @@ void JIT::emitSlow_op_jnstricteq(const I
>     linkAllSlowCases(iter);
> 
>     auto bytecode = currentInstruction->as<OpJnstricteq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     callOperation(operationCompareStrictEq, regT0, regT1);
>     emitJumpSlowToHot(branchTest32(Zero, returnValueGPR), target);
> }
>@@ -932,7 +932,7 @@ void JIT::emit_op_create_this(const Inst
> void JIT::emit_op_check_tdz(const Instruction* currentInstruction)
> {
>     auto bytecode = currentInstruction->as<OpCheckTdz>();
>-    emitGetVirtualRegister(bytecode.m_target.offset(), regT0);
>+    emitGetVirtualRegister(bytecode.m_targetVirtualRegister.offset(), regT0);
>     addSlowCase(branchIfEmpty(regT0));
> }
> 
>@@ -965,7 +965,7 @@ void JIT::emitSlow_op_jeq(const Instruct
>     linkAllSlowCases(iter);
> 
>     auto bytecode = currentInstruction->as<OpJeq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     callOperation(operationCompareEq, regT0, regT1);
>     emitJumpSlowToHot(branchTest32(NonZero, returnValueGPR), target);
> }
>@@ -975,7 +975,7 @@ void JIT::emitSlow_op_jneq(const Instruc
>     linkAllSlowCases(iter);
> 
>     auto bytecode = currentInstruction->as<OpJneq>();
>-    unsigned target = jumpTarget(currentInstruction, bytecode.m_target);
>+    unsigned target = jumpTarget(currentInstruction, bytecode.m_targetLabel);
>     callOperation(operationCompareEq, regT0, regT1);
>     emitJumpSlowToHot(branchTest32(Zero, returnValueGPR), target);
> }
>@@ -1399,7 +1399,7 @@ void JIT::emit_op_profile_type(const Ins
>     auto bytecode = currentInstruction->as<OpProfileType>();
>     auto& metadata = bytecode.metadata(m_codeBlock);
>     TypeLocation* cachedTypeLocation = metadata.m_typeLocation;
>-    int valueToProfile = bytecode.m_target.offset();
>+    int valueToProfile = bytecode.m_targetVirtualRegister.offset();
> 
>     emitGetVirtualRegister(valueToProfile, regT0);
> 
>Index: Source/JavaScriptCore/llint/LLIntSlowPaths.cpp
>===================================================================
>--- Source/JavaScriptCore/llint/LLIntSlowPaths.cpp	(revision 240135)
>+++ Source/JavaScriptCore/llint/LLIntSlowPaths.cpp	(working copy)
>@@ -122,8 +122,8 @@ namespace JSC { namespace LLInt {
>         LLINT_END_IMPL();                       \
>     } while (false)
> 
>-#define JUMP_OFFSET(target) \
>-    ((target) ? (target) : exec->codeBlock()->outOfLineJumpOffset(pc))
>+#define JUMP_OFFSET(targetOffset) \
>+    ((targetOffset) ? (targetOffset) : exec->codeBlock()->outOfLineJumpOffset(pc))
> 
> #define JUMP_TO(target) do { \
>         pc = reinterpret_cast<const Instruction*>(reinterpret_cast<const uint8_t*>(pc) + (target)); \
>@@ -133,7 +133,7 @@ namespace JSC { namespace LLInt {
>         bool __b_condition = (condition);                         \
>         LLINT_CHECK_EXCEPTION();                                  \
>         if (__b_condition)                                        \
>-            JUMP_TO(JUMP_OFFSET(bytecode.m_target)); \
>+            JUMP_TO(JUMP_OFFSET(bytecode.m_targetLabel));         \
>         else                                                      \
>             JUMP_TO(pc->size()); \
>         LLINT_END_IMPL();                                         \
>@@ -656,7 +656,7 @@ LLINT_SLOW_PATH_DECL(slow_path_get_by_id
>     if (!LLINT_ALWAYS_ACCESS_SLOW && slot.isCacheable()) {
>         auto& metadata = bytecode.metadata(exec);
>         {
>-            StructureID oldStructureID = metadata.m_structure;
>+            StructureID oldStructureID = metadata.m_structureID;
>             if (oldStructureID) {
>                 Structure* a = vm.heap.structureIDTable().get(oldStructureID);
>                 Structure* b = baseValue.asCell()->structure(vm);
>@@ -672,7 +672,7 @@ LLINT_SLOW_PATH_DECL(slow_path_get_by_id
>         Structure* structure = baseCell->structure(vm);
>         if (slot.isValue()) {
>             // Start out by clearing out the old cache.
>-            metadata.m_structure = 0;
>+            metadata.m_structureID = 0;
>             metadata.m_offset = 0;
> 
>             if (structure->propertyAccessesAreCacheable()
>@@ -681,7 +681,7 @@ LLINT_SLOW_PATH_DECL(slow_path_get_by_id
> 
>                 ConcurrentJSLocker locker(codeBlock->m_lock);
> 
>-                metadata.m_structure = structure->id();
>+                metadata.m_structureID = structure->id();
>                 metadata.m_offset = slot.cachedOffset();
>             }
>         }
>@@ -736,13 +736,13 @@ static void setupGetByIdPrototypeCache(E
> 
>     if (slot.isUnset()) {
>         metadata.m_mode = GetByIdMode::Unset;
>-        metadata.m_modeMetadata.unsetMode.structure = structure->id();
>+        metadata.m_modeMetadata.unsetMode.structureID = structure->id();
>         return;
>     }
>     ASSERT(slot.isValue());
> 
>     metadata.m_mode = GetByIdMode::ProtoLoad;
>-    metadata.m_modeMetadata.protoLoadMode.structure = structure->id();
>+    metadata.m_modeMetadata.protoLoadMode.structureID = structure->id();
>     metadata.m_modeMetadata.protoLoadMode.cachedOffset = offset;
>     metadata.m_modeMetadata.protoLoadMode.cachedSlot = slot.slotBase();
>     // We know that this pointer will remain valid because it will be cleared by either a watchpoint fire or
>@@ -773,13 +773,13 @@ LLINT_SLOW_PATH_DECL(slow_path_get_by_id
>             auto mode = metadata.m_mode;
>             switch (mode) {
>             case GetByIdMode::Default:
>-                oldStructureID = metadata.m_modeMetadata.defaultMode.structure;
>+                oldStructureID = metadata.m_modeMetadata.defaultMode.structureID;
>                 break;
>             case GetByIdMode::Unset:
>-                oldStructureID = metadata.m_modeMetadata.unsetMode.structure;
>+                oldStructureID = metadata.m_modeMetadata.unsetMode.structureID;
>                 break;
>             case GetByIdMode::ProtoLoad:
>-                oldStructureID = metadata.m_modeMetadata.protoLoadMode.structure;
>+                oldStructureID = metadata.m_modeMetadata.protoLoadMode.structureID;
>                 break;
>             default:
>                 oldStructureID = 0;
>@@ -800,7 +800,7 @@ LLINT_SLOW_PATH_DECL(slow_path_get_by_id
>         if (slot.isValue() && slot.slotBase() == baseValue) {
>             // Start out by clearing out the old cache.
>             metadata.m_mode = GetByIdMode::Default;
>-            metadata.m_modeMetadata.defaultMode.structure = 0;
>+            metadata.m_modeMetadata.defaultMode.structureID = 0;
>             metadata.m_modeMetadata.defaultMode.cachedOffset = 0;
> 
>             // Prevent the prototype cache from ever happening.
>@@ -812,7 +812,7 @@ LLINT_SLOW_PATH_DECL(slow_path_get_by_id
>                 
>                 ConcurrentJSLocker locker(codeBlock->m_lock);
> 
>-                metadata.m_modeMetadata.defaultMode.structure = structure->id();
>+                metadata.m_modeMetadata.defaultMode.structureID = structure->id();
>                 metadata.m_modeMetadata.defaultMode.cachedOffset = slot.cachedOffset();
>             }
>         } else if (UNLIKELY(metadata.m_hitCountForLLIntCaching && (slot.isValue() || slot.isUnset()))) {
>@@ -857,7 +857,7 @@ LLINT_SLOW_PATH_DECL(slow_path_put_by_id
>         && slot.isCacheablePut()) {
> 
>         {
>-            StructureID oldStructureID = metadata.m_oldStructure;
>+            StructureID oldStructureID = metadata.m_oldStructureID;
>             if (oldStructureID) {
>                 Structure* a = vm.heap.structureIDTable().get(oldStructureID);
>                 Structure* b = baseValue.asCell()->structure(vm);
>@@ -872,9 +872,9 @@ LLINT_SLOW_PATH_DECL(slow_path_put_by_id
>         }
> 
>         // Start out by clearing out the old cache.
>-        metadata.m_oldStructure = 0;
>+        metadata.m_oldStructureID = 0;
>         metadata.m_offset = 0;
>-        metadata.m_newStructure = 0;
>+        metadata.m_newStructureID = 0;
>         metadata.m_structureChain.clear();
>         
>         JSCell* baseCell = baseValue.asCell();
>@@ -896,9 +896,9 @@ LLINT_SLOW_PATH_DECL(slow_path_put_by_id
>                     auto result = normalizePrototypeChain(exec, baseCell, sawPolyProto);
>                     if (result != InvalidPrototypeChain && !sawPolyProto) {
>                         ASSERT(structure->previousID()->isObject());
>-                        metadata.m_oldStructure = structure->previousID()->id();
>+                        metadata.m_oldStructureID = structure->previousID()->id();
>                         metadata.m_offset = slot.cachedOffset();
>-                        metadata.m_newStructure = structure->id();
>+                        metadata.m_newStructureID = structure->id();
>                         if (!(bytecode.m_flags & PutByIdIsDirect)) {
>                             StructureChain* chain = structure->prototypeChain(exec, asObject(baseCell));
>                             ASSERT(chain);
>@@ -908,7 +908,7 @@ LLINT_SLOW_PATH_DECL(slow_path_put_by_id
>                 }
>             } else {
>                 structure->didCachePropertyReplacement(vm, slot.cachedOffset());
>-                metadata.m_oldStructure = structure->id();
>+                metadata.m_oldStructureID = structure->id();
>                 metadata.m_offset = slot.cachedOffset();
>             }
>         }
>Index: Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm
>===================================================================
>--- Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm	(revision 240135)
>+++ Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm	(working copy)
>@@ -35,20 +35,20 @@ macro nextInstructionWide()
>     jmp [t1, t0, 4], BytecodePtrTag
> end
> 
>-macro getuOperandNarrow(op, fieldName, dst)
>-    loadb constexpr %op%_%fieldName%_index[PC], dst
>+macro getuOperandNarrow(opcodeStruct, fieldName, dst)
>+    loadb constexpr %opcodeStruct%_%fieldName%_index[PC], dst
> end
> 
>-macro getOperandNarrow(op, fieldName, dst)
>-    loadbsp constexpr %op%_%fieldName%_index[PC], dst
>+macro getOperandNarrow(opcodeStruct, fieldName, dst)
>+    loadbsp constexpr %opcodeStruct%_%fieldName%_index[PC], dst
> end
> 
>-macro getuOperandWide(op, fieldName, dst)
>-    loadi constexpr %op%_%fieldName%_index * 4 + 1[PC], dst
>+macro getuOperandWide(opcodeStruct, fieldName, dst)
>+    loadi constexpr %opcodeStruct%_%fieldName%_index * 4 + 1[PC], dst
> end
> 
>-macro getOperandWide(op, fieldName, dst)
>-    loadis constexpr %op%_%fieldName%_index * 4 + 1[PC], dst
>+macro getOperandWide(opcodeStruct, fieldName, dst)
>+    loadis constexpr %opcodeStruct%_%fieldName%_index * 4 + 1[PC], dst
> end
> 
> macro makeReturn(get, dispatch, fn)
>@@ -62,13 +62,13 @@ macro makeReturn(get, dispatch, fn)
>     end)
> end
> 
>-macro makeReturnProfiled(op, get, metadata, dispatch, fn)
>+macro makeReturnProfiled(opcodeStruct, get, metadata, dispatch, fn)
>     fn(macro (tag, payload)
>         move tag, t1
>         move payload, t0
> 
>         metadata(t5, t2)
>-        valueProfile(op, t5, t1, t0)
>+        valueProfile(opcodeStruct, t5, t1, t0)
>         get(m_dst, t2)
>         storei t1, TagOffset[cfr, t2, 8]
>         storei t0, PayloadOffset[cfr, t2, 8]
>@@ -77,13 +77,13 @@ macro makeReturnProfiled(op, get, metada
> end
> 
> 
>-macro dispatchAfterCall(size, op, dispatch)
>+macro dispatchAfterCall(size, opcodeStruct, dispatch)
>     loadi ArgumentCount + TagOffset[cfr], PC
>-    get(size, op, m_dst, t3)
>+    get(size, opcodeStruct, m_dst, t3)
>     storei r1, TagOffset[cfr, t3, 8]
>     storei r0, PayloadOffset[cfr, t3, 8]
>-    metadata(size, op, t2, t3)
>-    valueProfile(op, t2, r1, r0)
>+    metadata(size, opcodeStruct, t2, t3)
>+    valueProfile(opcodeStruct, t2, r1, r0)
>     dispatch()
> end
> 
>@@ -598,9 +598,9 @@ macro writeBarrierOnGlobalLexicalEnviron
>         end)
> end
> 
>-macro valueProfile(op, metadata, tag, payload)
>-    storei tag, %op%::Metadata::m_profile.m_buckets + TagOffset[metadata]
>-    storei payload, %op%::Metadata::m_profile.m_buckets + PayloadOffset[metadata]
>+macro valueProfile(opcodeStruct, metadata, tag, payload)
>+    storei tag, %opcodeStruct%::Metadata::m_profile.m_buckets + TagOffset[metadata]
>+    storei payload, %opcodeStruct%::Metadata::m_profile.m_buckets + PayloadOffset[metadata]
> end
> 
> 
>@@ -682,7 +682,7 @@ macro branchIfException(label)
>     loadp Callee + PayloadOffset[cfr], t3
>     andp MarkedBlockMask, t3
>     loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
>-    btiz VM::m_exception[t3], .noException
>+    btpz VM::m_exception[t3], .noException
>     jmp label
> .noException:
> end
>@@ -734,7 +734,7 @@ end)
> 
> llintOpWithReturn(op_get_scope, OpGetScope, macro (size, get, dispatch, return)
>     loadi Callee + PayloadOffset[cfr], t0
>-    loadi JSCallee::m_scope[t0], t0
>+    loadp JSCallee::m_scope[t0], t0
>     return (CellTag, t0)
> end)
> 
>@@ -756,7 +756,7 @@ end)
> 
> 
> llintOp(op_check_tdz, OpCheckTdz, macro (size, get, dispatch)
>-    get(m_target, t0)
>+    get(m_targetVirtualRegister, t0)
>     loadConstantOrVariableTag(size, t0, t1)
>     bineq t1, EmptyValueTag, .opNotTDZ
>     callSlowPath(_slow_path_throw_tdz_error)
>@@ -786,8 +786,8 @@ llintOpWithReturn(op_not, OpNot, macro (
> end)
> 
> 
>-macro equalityComparisonOp(name, op, integerComparison)
>-    llintOpWithReturn(op_%name%, op, macro (size, get, dispatch, return)
>+macro equalityComparisonOp(opcodeName, opcodeStruct, integerComparison)
>+    llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t2)
>         get(m_lhs, t0)
>         loadConstantOrVariable(size, t2, t3, t1)
>@@ -799,14 +799,14 @@ macro equalityComparisonOp(name, op, int
>         return(BooleanTag, t0)
> 
>     .opEqSlow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
> 
> 
>-macro equalityJumpOp(name, op, integerComparison)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro equalityJumpOp(opcodeName, opcodeStruct, integerComparison)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_rhs, t2)
>         get(m_lhs, t0)
>         loadConstantOrVariable(size, t2, t3, t1)
>@@ -818,17 +818,17 @@ macro equalityJumpOp(name, op, integerCo
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
> 
> 
>-macro equalNullComparisonOp(name, op, fn)
>-    llintOpWithReturn(name, op, macro (size, get, dispatch, return)
>+macro equalNullComparisonOp(opcodeName, opcodeStruct, fn)
>+    llintOpWithReturn(opcodeName, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_operand, t0)
>         assertNotConstant(size, t0)
>         loadi TagOffset[cfr, t0, 8], t1
>@@ -869,8 +869,8 @@ llintOpWithReturn(op_is_undefined_or_nul
> end)
> 
> 
>-macro strictEqOp(name, op, equalityOperation)
>-    llintOpWithReturn(op_%name%, op, macro (size, get, dispatch, return)
>+macro strictEqOp(opcodeName, opcodeStruct, equalityOperation)
>+    llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t2)
>         get(m_lhs, t0)
>         loadConstantOrVariable(size, t2, t3, t1)
>@@ -885,14 +885,14 @@ macro strictEqOp(name, op, equalityOpera
>         return(BooleanTag, t0)
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
> 
> 
>-macro strictEqualityJumpOp(name, op, equalityOperation)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro strictEqualityJumpOp(opcodeName, opcodeStruct, equalityOperation)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_rhs, t2)
>         get(m_lhs, t0)
>         loadConstantOrVariable(size, t2, t3, t1)
>@@ -907,10 +907,10 @@ macro strictEqualityJumpOp(name, op, equ
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
>@@ -932,8 +932,8 @@ strictEqualityJumpOp(jnstricteq, OpJnstr
>     macro (left, right, target) bineq left, right, target end)
> 
> 
>-macro preOp(name, op, operation)
>-    llintOp(op_%name%, op, macro (size, get, dispatch)
>+macro preOp(opcodeName, opcodeStruct, operation)
>+    llintOp(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch)
>         get(m_srcDst, t0)
>         bineq TagOffset[cfr, t0, 8], Int32Tag, .slow
>         loadi PayloadOffset[cfr, t0, 8], t1
>@@ -942,7 +942,7 @@ macro preOp(name, op, operation)
>         dispatch()
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -992,7 +992,7 @@ end)
> llintOpWithMetadata(op_negate, OpNegate, macro (size, get, dispatch, metadata, return)
> 
>     macro arithProfile(type)
>-        ori type, OpNegate::Metadata::m_arithProfile[t5]
>+        ori type, OpNegate::Metadata::m_arithProfile + ArithProfile::m_bits[t5]
>     end
> 
>     metadata(t5, t0)
>@@ -1015,10 +1015,10 @@ llintOpWithMetadata(op_negate, OpNegate,
> end)
> 
> 
>-macro binaryOpCustomStore(name, op, integerOperationAndStore, doubleOperation)
>-    llintOpWithMetadata(op_%name%, op, macro (size, get, dispatch, metadata, return)
>+macro binaryOpCustomStore(opcodeName, opcodeStruct, integerOperationAndStore, doubleOperation)
>+    llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
>         macro arithProfile(type)
>-            ori type, %op%::Metadata::m_arithProfile[t5]
>+            ori type, %opcodeStruct%::Metadata::m_arithProfile + ArithProfile::m_bits[t5]
>         end
> 
>         metadata(t5, t2)
>@@ -1063,13 +1063,13 @@ macro binaryOpCustomStore(name, op, inte
>         dispatch()
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
> 
>-macro binaryOp(name, op, integerOperation, doubleOperation)
>-    binaryOpCustomStore(name, op,
>+macro binaryOp(opcodeName, opcodeStruct, integerOperation, doubleOperation)
>+    binaryOpCustomStore(opcodeName, opcodeStruct,
>         macro (int32Tag, left, right, slow, index)
>             integerOperation(left, right, slow)
>             storei int32Tag, TagOffset[cfr, index, 8]
>@@ -1130,8 +1130,8 @@ llintOpWithReturn(op_unsigned, OpUnsigne
> end)
> 
> 
>-macro commonBitOp(opKind, name, op, operation)
>-    opKind(op_%name%, op, macro (size, get, dispatch, return)
>+macro commonBitOp(opKind, opcodeName, opcodeStruct, operation)
>+    opKind(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t2)
>         get(m_lhs, t0)
>         loadConstantOrVariable(size, t2, t3, t1)
>@@ -1142,17 +1142,17 @@ macro commonBitOp(opKind, name, op, oper
>         return (t3, t0)
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
> 
>-macro bitOp(name, op, operation)
>-    commonBitOp(llintOpWithReturn, name, op, operation)
>+macro bitOp(opcodeName, opcodeStruct, operation)
>+    commonBitOp(llintOpWithReturn, opcodeName, opcodeStruct, operation)
> end
> 
>-macro bitOpProfiled(name, op, operation)
>-    commonBitOp(llintOpWithProfile, name, op, operation)
>+macro bitOpProfiled(opcodeName, opcodeStruct, operation)
>+    commonBitOp(llintOpWithProfile, opcodeName, opcodeStruct, operation)
> end
> 
> 
>@@ -1328,10 +1328,10 @@ end
> llintOpWithMetadata(op_get_by_id_direct, OpGetByIdDirect, macro (size, get, dispatch, metadata, return)
>     metadata(t5, t0)
>     get(m_base, t0)
>-    loadi OpGetByIdDirect::Metadata::m_structure[t5], t1
>+    loadp OpGetByIdDirect::Metadata::m_structureID[t5], t1
>     loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdDirectSlow)
>     loadi OpGetByIdDirect::Metadata::m_offset[t5], t2
>-    bineq JSCell::m_structureID[t3], t1, .opGetByIdDirectSlow
>+    bpneq JSCell::m_structureID[t3], t1, .opGetByIdDirectSlow
>     loadPropertyAtVariableOffset(t2, t3, t0, t1)
>     valueProfile(OpGetByIdDirect, t5, t0, t1)
>     return(t0, t1)
>@@ -1349,10 +1349,10 @@ llintOpWithMetadata(op_get_by_id, OpGetB
> 
> .opGetByIdProtoLoad:
>     bbneq t1, constexpr GetByIdMode::ProtoLoad, .opGetByIdArrayLength
>-    loadi OpGetById::Metadata::m_modeMetadata.protoLoadMode.structure[t5], t1
>+    loadp OpGetById::Metadata::m_modeMetadata.protoLoadMode.structureID[t5], t1
>     loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
>     loadis OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedOffset[t5], t2
>-    bineq JSCell::m_structureID[t3], t1, .opGetByIdSlow
>+    bpneq JSCell::m_structureID[t3], t1, .opGetByIdSlow
>     loadp OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedSlot[t5], t3
>     loadPropertyAtVariableOffset(t2, t3, t0, t1)
>     valueProfile(OpGetById, t5, t0, t1)
>@@ -1373,17 +1373,17 @@ llintOpWithMetadata(op_get_by_id, OpGetB
> 
> .opGetByIdUnset:
>     bbneq t1, constexpr GetByIdMode::Unset, .opGetByIdDefault
>-    loadi OpGetById::Metadata::m_modeMetadata.unsetMode.structure[t5], t1
>+    loadp OpGetById::Metadata::m_modeMetadata.unsetMode.structureID[t5], t1
>     loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
>-    bineq JSCell::m_structureID[t3], t1, .opGetByIdSlow
>+    bpneq JSCell::m_structureID[t3], t1, .opGetByIdSlow
>     valueProfile(OpGetById, t5, UndefinedTag, 0)
>     return(UndefinedTag, 0)
> 
> .opGetByIdDefault:
>-    loadi OpGetById::Metadata::m_modeMetadata.defaultMode.structure[t5], t1
>+    loadp OpGetById::Metadata::m_modeMetadata.defaultMode.structureID[t5], t1
>     loadConstantOrVariablePayload(size, t0, CellTag, t3, .opGetByIdSlow)
>     loadis OpGetById::Metadata::m_modeMetadata.defaultMode.cachedOffset[t5], t2
>-    bineq JSCell::m_structureID[t3], t1, .opGetByIdSlow
>+    bpneq JSCell::m_structureID[t3], t1, .opGetByIdSlow
>     loadPropertyAtVariableOffset(t2, t3, t0, t1)
>     valueProfile(OpGetById, t5, t0, t1)
>     return(t0, t1)
>@@ -1399,8 +1399,8 @@ llintOpWithMetadata(op_put_by_id, OpPutB
>     metadata(t5, t3)
>     get(m_base, t3)
>     loadConstantOrVariablePayload(size, t3, CellTag, t0, .opPutByIdSlow)
>-    loadi JSCell::m_structureID[t0], t2
>-    bineq t2, OpPutById::Metadata::m_oldStructure[t5], .opPutByIdSlow
>+    loadp JSCell::m_structureID[t0], t2
>+    bpneq t2, OpPutById::Metadata::m_oldStructureID[t5], .opPutByIdSlow
> 
>     # At this point, we have:
>     # t5 -> metadata
>@@ -1408,7 +1408,7 @@ llintOpWithMetadata(op_put_by_id, OpPutB
>     # t0 -> object base
>     # We will lose currentStructureID in the shenanigans below.
> 
>-    loadi OpPutById::Metadata::m_newStructure[t5], t1
>+    loadp OpPutById::Metadata::m_newStructureID[t5], t1
> 
>     btiz t1, .opPutByIdNotTransition
> 
>@@ -1417,7 +1417,7 @@ llintOpWithMetadata(op_put_by_id, OpPutB
>     loadp OpPutById::Metadata::m_structureChain[t5], t3
>     btpz t3, .opPutByIdTransitionDirect
> 
>-    loadi OpPutById::Metadata::m_oldStructure[t5], t2 # Need old structure again.
>+    loadp OpPutById::Metadata::m_oldStructureID[t5], t2 # Need old structure again.
>     loadp StructureChain::m_vector[t3], t3
>     assert(macro (ok) btpnz t3, ok end)
> 
>@@ -1431,10 +1431,10 @@ llintOpWithMetadata(op_put_by_id, OpPutB
>     btpnz t2, .opPutByIdTransitionChainLoop
> 
> .opPutByIdTransitionChainDone:
>-    loadi OpPutById::Metadata::m_newStructure[t5], t1
>+    loadp OpPutById::Metadata::m_newStructureID[t5], t1
> 
> .opPutByIdTransitionDirect:
>-    storei t1, JSCell::m_structureID[t0]
>+    storep t1, JSCell::m_structureID[t0]
>     get(m_value, t1)
>     loadConstantOrVariable(size, t1, t2, t3)
>     loadi OpPutById::Metadata::m_offset[t5], t1
>@@ -1507,8 +1507,8 @@ llintOpWithMetadata(op_get_by_val, OpGet
> end)
> 
> 
>-macro putByValOp(name, op)
>-    llintOpWithMetadata(op_%name%, op, macro (size, get, dispatch, metadata, return)
>+macro putByValOp(opcodeName, opcodeStruct)
>+    llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
>         macro contiguousPutByVal(storeCallback)
>             biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], .outOfBounds
>         .storeResult:
>@@ -1518,7 +1518,7 @@ macro putByValOp(name, op)
> 
>         .outOfBounds:
>             biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t0], .opPutByValOutOfBounds
>-            storeb 1, %op%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>+            storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>             addi 1, t3, t2
>             storei t2, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0]
>             jmp .storeResult
>@@ -1529,7 +1529,7 @@ macro putByValOp(name, op)
>         get(m_base, t0)
>         loadConstantOrVariablePayload(size, t0, CellTag, t1, .opPutByValSlow)
>         move t1, t2
>-        arrayProfile(%op%::Metadata::m_arrayProfile, t2, t5, t0)
>+        arrayProfile(%opcodeStruct%::Metadata::m_arrayProfile, t2, t5, t0)
>         get(m_property, t0)
>         loadConstantOrVariablePayload(size, t0, Int32Tag, t3, .opPutByValSlow)
>         loadp JSObject::m_butterfly[t1], t0
>@@ -1583,7 +1583,7 @@ macro putByValOp(name, op)
>         dispatch()
> 
>     .opPutByValArrayStorageEmpty:
>-        storeb 1, %op%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>+        storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>         addi 1, ArrayStorage::m_numValuesInVector[t0]
>         bib t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], .opPutByValArrayStorageStoreResult
>         addi 1, t3, t1
>@@ -1591,9 +1591,9 @@ macro putByValOp(name, op)
>         jmp .opPutByValArrayStorageStoreResult
> 
>     .opPutByValOutOfBounds:
>-        storeb 1, %op%::Metadata::m_arrayProfile.m_outOfBounds[t5]
>+        storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_outOfBounds[t5]
>     .opPutByValSlow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -1604,25 +1604,25 @@ putByValOp(put_by_val, OpPutByVal)
> putByValOp(put_by_val_direct, OpPutByValDirect)
> 
> 
>-macro llintJumpTrueOrFalseOp(name, op, conditionOp)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro llintJumpTrueOrFalseOp(opcodeName, opcodeStruct, conditionOp)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_condition, t1)
>         loadConstantOrVariablePayload(size, t1, BooleanTag, t0, .slow)
>         conditionOp(t0, .target)
>         dispatch()
> 
>     .target:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
> 
> 
>-macro equalNullJumpOp(name, op, cellHandler, immediateHandler)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro equalNullJumpOp(opcodeName, opcodeStruct, cellHandler, immediateHandler)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_value, t0)
>         assertNotConstant(size, t0)
>         loadi TagOffset[cfr, t0, 8], t1
>@@ -1633,7 +1633,7 @@ macro equalNullJumpOp(name, op, cellHand
>         dispatch()
> 
>     .target:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .immediate:
>         ori 1, t1
>@@ -1665,7 +1665,7 @@ equalNullJumpOp(jneq_null, OpJneqNull,
> 
> llintOpWithMetadata(op_jneq_ptr, OpJneqPtr, macro (size, get, dispatch, metadata, return)
>     get(m_value, t0)
>-    get(m_specialPointer, t1)
>+    getu(size, OpJneqPtr, m_specialPointer, t1)
>     loadp CodeBlock[cfr], t2
>     loadp CodeBlock::m_globalObject[t2], t2
>     bineq TagOffset[cfr, t0, 8], CellTag, .opJneqPtrBranch
>@@ -1674,15 +1674,15 @@ llintOpWithMetadata(op_jneq_ptr, OpJneqP
> .opJneqPtrBranch:
>     metadata(t5, t2)
>     storeb 1, OpJneqPtr::Metadata::m_hasJumped[t5]
>-    get(m_target, t0)
>+    get(m_targetLabel, t0)
>     jumpImpl(t0)
> .opJneqPtrFallThrough:
>     dispatch()
> end)
> 
> 
>-macro compareUnsignedJumpOp(name, op, integerCompare)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro compareUnsignedJumpOp(opcodeName, opcodeStruct, integerCompare)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_lhs, t2)
>         get(m_rhs, t3)
>         loadConstantOrVariable(size, t2, t0, t1)
>@@ -1691,13 +1691,13 @@ macro compareUnsignedJumpOp(name, op, in
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
>     end)
> end
> 
> 
>-macro compareUnsignedOp(name, op, integerCompareAndSet)
>-    llintOpWithReturn(op_%name%, op, macro (size, get, dispatch, return)
>+macro compareUnsignedOp(opcodeName, opcodeStruct, integerCompareAndSet)
>+    llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t2)
>         get(m_lhs, t0)
>         loadConstantOrVariable(size, t2, t3, t1)
>@@ -1708,8 +1708,8 @@ macro compareUnsignedOp(name, op, intege
> end
> 
> 
>-macro compareJumpOp(name, op, integerCompare, doubleCompare)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro compareJumpOp(opcodeName, opcodeStruct, integerCompare, doubleCompare)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_lhs, t2)
>         get(m_rhs, t3)
>         loadConstantOrVariable(size, t2, t0, t1)
>@@ -1740,10 +1740,10 @@ macro compareJumpOp(name, op, integerCom
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
>@@ -1751,7 +1751,7 @@ end
> 
> llintOpWithJump(op_switch_imm, OpSwitchImm, macro (size, get, jump, dispatch)
>     get(m_scrutinee, t2)
>-    get(m_tableIndex, t3)
>+    getu(size, OpSwitchImm, m_tableIndex, t3)
>     loadConstantOrVariable(size, t2, t1, t0)
>     loadp CodeBlock[cfr], t2
>     loadp CodeBlock::m_rareData[t2], t2
>@@ -1779,7 +1779,7 @@ end)
> 
> llintOpWithJump(op_switch_char, OpSwitchChar, macro (size, get, jump, dispatch)
>     get(m_scrutinee, t2)
>-    get(m_tableIndex, t3)
>+    getu(size, OpSwitchChar, m_tableIndex, t3)
>     loadConstantOrVariable(size, t2, t1, t0)
>     loadp CodeBlock[cfr], t2
>     loadp CodeBlock::m_rareData[t2], t2
>@@ -1814,43 +1814,43 @@ llintOpWithJump(op_switch_char, OpSwitch
> end)
> 
> 
>-macro arrayProfileForCall(op, getu)
>+macro arrayProfileForCall(opcodeStruct, getu)
>     getu(m_argv, t3)
>     negi t3
>     bineq ThisArgumentOffset + TagOffset[cfr, t3, 8], CellTag, .done
>     loadi ThisArgumentOffset + PayloadOffset[cfr, t3, 8], t0
>     loadp JSCell::m_structureID[t0], t0
>-    storep t0, %op%::Metadata::m_arrayProfile.m_lastSeenStructureID[t5]
>+    storep t0, %opcodeStruct%::Metadata::m_arrayProfile.m_lastSeenStructureID[t5]
> .done:
> end
> 
>-macro commonCallOp(name, slowPath, op, prepareCall, prologue)
>-    llintOpWithMetadata(name, op, macro (size, get, dispatch, metadata, return)
>+macro commonCallOp(opcodeName, slowPath, opcodeStruct, prepareCall, prologue)
>+    llintOpWithMetadata(opcodeName, opcodeStruct, macro (size, get, dispatch, metadata, return)
>         metadata(t5, t0)
> 
>         prologue(macro (fieldName, dst)
>-            getu(size, op, fieldName, dst)
>+            getu(size, opcodeStruct, fieldName, dst)
>         end, metadata)
> 
>         get(m_callee, t0)
>-        loadp %op%::Metadata::m_callLinkInfo.callee[t5], t2
>+        loadp %opcodeStruct%::Metadata::m_callLinkInfo.callee[t5], t2
>         loadConstantOrVariablePayload(size, t0, CellTag, t3, .opCallSlow)
>         bineq t3, t2, .opCallSlow
>-        getu(size, op, m_argv, t3)
>+        getu(size, opcodeStruct, m_argv, t3)
>         lshifti 3, t3
>         negi t3
>         addp cfr, t3  # t3 contains the new value of cfr
>         storei t2, Callee + PayloadOffset[t3]
>-        getu(size, op, m_argc, t2)
>+        getu(size, opcodeStruct, m_argc, t2)
>         storei PC, ArgumentCount + TagOffset[cfr]
>         storei t2, ArgumentCount + PayloadOffset[t3]
>         storei CellTag, Callee + TagOffset[t3]
>         move t3, sp
>-        prepareCall(%op%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2, t3, t4, JSEntryPtrTag)
>-        callTargetFunction(size, op, dispatch, %op%::Metadata::m_callLinkInfo.machineCodeTarget[t5], JSEntryPtrTag)
>+        prepareCall(%opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2, t3, t4, JSEntryPtrTag)
>+        callTargetFunction(size, opcodeStruct, dispatch, %opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], JSEntryPtrTag)
> 
>     .opCallSlow:
>-        slowPathForCall(size, op, dispatch, slowPath, prepareCall)
>+        slowPathForCall(size, opcodeStruct, dispatch, slowPath, prepareCall)
>     end)
> end
> 
>@@ -1905,8 +1905,8 @@ commonOp(llint_op_catch, macro() end, ma
>     andp MarkedBlockMask, t3
>     loadp MarkedBlockFooterOffset + MarkedBlock::Footer::m_vm[t3], t3
> 
>-    loadi VM::m_exception[t3], t0
>-    storei 0, VM::m_exception[t3]
>+    loadp VM::m_exception[t3], t0
>+    storep 0, VM::m_exception[t3]
>     get(size, OpCatch, m_exception, t2)
>     storei t0, PayloadOffset[cfr, t2, 8]
>     storei CellTag, TagOffset[cfr, t2, 8]
>@@ -2013,7 +2013,7 @@ macro nativeCallTrampoline(executableOff
>         error
>     end
>     
>-    btinz VM::m_exception[t3], .handleException
>+    btpnz VM::m_exception[t3], .handleException
> 
>     functionEpilogue()
>     ret
>@@ -2068,7 +2068,7 @@ macro internalFunctionCallTrampoline(off
>         error
>     end
> 
>-    btinz VM::m_exception[t3], .handleException
>+    btpnz VM::m_exception[t3], .handleException
> 
>     functionEpilogue()
>     ret
>@@ -2113,7 +2113,7 @@ llintOpWithMetadata(op_resolve_scope, Op
>     end
> 
>     metadata(t5, t0)
>-    loadp OpResolveScope::Metadata::m_resolveType[t5], t0
>+    loadi OpResolveScope::Metadata::m_resolveType[t5], t0
> 
> #rGlobalProperty:
>     bineq t0, GlobalProperty, .rGlobalVar
>@@ -2161,10 +2161,10 @@ llintOpWithMetadata(op_resolve_scope, Op
> end)
> 
> 
>-macro loadWithStructureCheck(op, get, operand, slowPath)
>+macro loadWithStructureCheck(opcodeStruct, get, operand, slowPath)
>     get(m_scope, t0)
>     loadp PayloadOffset[cfr, t0, 8], t0
>-    loadp %op%::Metadata::m_structure[t5], t1
>+    loadp %opcodeStruct%::Metadata::m_structure[t5], t1
>     bpneq JSCell::m_structureID[t0], t1, slowPath
> end
> 
>@@ -2195,7 +2195,7 @@ llintOpWithMetadata(op_get_from_scope, O
>     end
> 
>     metadata(t5, t0)
>-    loadi OpGetFromScope::Metadata::m_getPutInfo[t5], t0
>+    loadi OpGetFromScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
>     andi ResolveTypeMask, t0
> 
> #gGlobalProperty:
>@@ -2253,7 +2253,7 @@ llintOpWithMetadata(op_put_to_scope, OpP
>     macro putProperty()
>         get(m_value, t1)
>         loadConstantOrVariable(size, t1, t2, t3)
>-        loadis OpPutToScope::Metadata::m_operand[t5], t1
>+        loadp OpPutToScope::Metadata::m_operand[t5], t1
>         storePropertyAtVariableOffset(t1, t0, t2, t3)
>     end
> 
>@@ -2270,7 +2270,7 @@ llintOpWithMetadata(op_put_to_scope, OpP
>     macro putClosureVar()
>         get(m_value, t1)
>         loadConstantOrVariable(size, t1, t2, t3)
>-        loadis OpPutToScope::Metadata::m_operand[t5], t1
>+        loadp OpPutToScope::Metadata::m_operand[t5], t1
>         storei t2, JSLexicalEnvironment_variables + TagOffset[t0, t1, 8]
>         storei t3, JSLexicalEnvironment_variables + PayloadOffset[t0, t1, 8]
>     end
>@@ -2282,14 +2282,14 @@ llintOpWithMetadata(op_put_to_scope, OpP
>         btpz t1, .noVariableWatchpointSet
>         notifyWrite(t1, .pDynamic)
>     .noVariableWatchpointSet:
>-        loadis OpPutToScope::Metadata::m_operand[t5], t1
>+        loadp OpPutToScope::Metadata::m_operand[t5], t1
>         storei t2, JSLexicalEnvironment_variables + TagOffset[t0, t1, 8]
>         storei t3, JSLexicalEnvironment_variables + PayloadOffset[t0, t1, 8]
>     end
> 
> 
>     metadata(t5, t0)
>-    loadi OpPutToScope::Metadata::m_getPutInfo[t5], t0
>+    loadi OpPutToScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
>     andi ResolveTypeMask, t0
> 
> #pLocalClosureVar:
>@@ -2368,7 +2368,7 @@ end)
> llintOpWithProfile(op_get_from_arguments, OpGetFromArguments, macro (size, get, dispatch, return)
>     get(m_arguments, t0)
>     loadi PayloadOffset[cfr, t0, 8], t0
>-    get(m_index, t1)
>+    getu(size, OpGetFromArguments, m_index, t1)
>     loadi DirectArguments_storage + TagOffset[t0, t1, 8], t2
>     loadi DirectArguments_storage + PayloadOffset[t0, t1, 8], t3
>     return(t2, t3)
>@@ -2381,7 +2381,7 @@ llintOp(op_put_to_arguments, OpPutToArgu
>     loadi PayloadOffset[cfr, t0, 8], t0
>     get(m_value, t1)
>     loadConstantOrVariable(size, t1, t2, t3)
>-    get(m_index, t1)
>+    getu(size, OpPutToArguments, m_index, t1)
>     storei t2, DirectArguments_storage + TagOffset[t0, t1, 8]
>     storei t3, DirectArguments_storage + PayloadOffset[t0, t1, 8]
>     dispatch()
>@@ -2404,7 +2404,7 @@ llintOpWithMetadata(op_profile_type, OpP
>     loadp VM::m_typeProfilerLog[t1], t1
> 
>     # t0 is holding the payload, t5 is holding the tag.
>-    get(m_target, t2)
>+    get(m_targetVirtualRegister, t2)
>     loadConstantOrVariable(size, t2, t5, t0)
> 
>     bieq t5, EmptyValueTag, .opProfileTypeDone
>@@ -2425,7 +2425,7 @@ llintOpWithMetadata(op_profile_type, OpP
>     storei 0, TypeProfilerLog::LogEntry::structureID[t2]
>     jmp .opProfileTypeSkipIsCell
> .opProfileTypeIsCell:
>-    loadi JSCell::m_structureID[t0], t3
>+    loadp JSCell::m_structureID[t0], t3
>     storei t3, TypeProfilerLog::LogEntry::structureID[t2]
> .opProfileTypeSkipIsCell:
>     
>@@ -2456,7 +2456,7 @@ end)
> llintOpWithReturn(op_get_rest_length, OpGetRestLength, macro (size, get, dispatch, return)
>     loadi PayloadOffset + ArgumentCount[cfr], t0
>     subi 1, t0
>-    get(m_numParametersToSkip, t1)
>+    getu(size, OpGetRestLength, m_numParametersToSkip, t1)
>     bilteq t0, t1, .storeZero
>     subi t1, t0
>     jmp .finish
>Index: Source/JavaScriptCore/llint/LowLevelInterpreter64.asm
>===================================================================
>--- Source/JavaScriptCore/llint/LowLevelInterpreter64.asm	(revision 240135)
>+++ Source/JavaScriptCore/llint/LowLevelInterpreter64.asm	(working copy)
>@@ -36,20 +36,20 @@ macro nextInstructionWide()
>     jmp [t1, t0, PtrSize], BytecodePtrTag
> end
> 
>-macro getuOperandNarrow(op, fieldName, dst)
>-    loadb constexpr %op%_%fieldName%_index[PB, PC, 1], dst
>+macro getuOperandNarrow(opcodeStruct, fieldName, dst)
>+    loadb constexpr %opcodeStruct%_%fieldName%_index[PB, PC, 1], dst
> end
> 
>-macro getOperandNarrow(op, fieldName, dst)
>-    loadbsp constexpr %op%_%fieldName%_index[PB, PC, 1], dst
>+macro getOperandNarrow(opcodeStruct, fieldName, dst)
>+    loadbsp constexpr %opcodeStruct%_%fieldName%_index[PB, PC, 1], dst
> end
> 
>-macro getuOperandWide(op, fieldName, dst)
>-    loadi constexpr %op%_%fieldName%_index * 4 + 1[PB, PC, 1], dst
>+macro getuOperandWide(opcodeStruct, fieldName, dst)
>+    loadi constexpr %opcodeStruct%_%fieldName%_index * 4 + 1[PB, PC, 1], dst
> end
> 
>-macro getOperandWide(op, fieldName, dst)
>-    loadis constexpr %op%_%fieldName%_index * 4 + 1[PB, PC, 1], dst
>+macro getOperandWide(opcodeStruct, fieldName, dst)
>+    loadis constexpr %opcodeStruct%_%fieldName%_index * 4 + 1[PB, PC, 1], dst
> end
> 
> macro makeReturn(get, dispatch, fn)
>@@ -61,30 +61,30 @@ macro makeReturn(get, dispatch, fn)
>     end)
> end
> 
>-macro makeReturnProfiled(op, get, metadata, dispatch, fn)
>+macro makeReturnProfiled(opcodeStruct, get, metadata, dispatch, fn)
>     fn(macro (value)
>         move value, t3
>         metadata(t1, t2)
>-        valueProfile(op, t1, t3)
>+        valueProfile(opcodeStruct, t1, t3)
>         get(m_dst, t1)
>         storeq t3, [cfr, t1, 8]
>         dispatch()
>     end)
> end
> 
>-macro valueProfile(op, metadata, value)
>-    storeq value, %op%::Metadata::m_profile.m_buckets[metadata]
>+macro valueProfile(opcodeStruct, metadata, value)
>+    storeq value, %opcodeStruct%::Metadata::m_profile.m_buckets[metadata]
> end
> 
>-macro dispatchAfterCall(size, op, dispatch)
>+macro dispatchAfterCall(size, opcodeStruct, dispatch)
>     loadi ArgumentCount + TagOffset[cfr], PC
>     loadp CodeBlock[cfr], PB
>     loadp CodeBlock::m_instructionsRawPointer[PB], PB
>     unpoison(_g_CodeBlockPoison, PB, t1)
>-    get(size, op, m_dst, t1)
>+    get(size, opcodeStruct, m_dst, t1)
>     storeq r0, [cfr, t1, 8]
>-    metadata(size, op, t2, t1)
>-    valueProfile(op, t2, r0)
>+    metadata(size, opcodeStruct, t2, t1)
>+    valueProfile(opcodeStruct, t2, r0)
>     dispatch()
> end
> 
>@@ -710,7 +710,7 @@ end)
> 
> 
> llintOp(op_check_tdz, OpCheckTdz, macro (size, get, dispatch)
>-    get(m_target, t0)
>+    get(m_targetVirtualRegister, t0)
>     loadConstantOrVariable(size, t0, t1)
>     bqneq t1, ValueEmpty, .opNotTDZ
>     callSlowPath(_slow_path_throw_tdz_error)
>@@ -741,8 +741,8 @@ llintOpWithReturn(op_not, OpNot, macro (
> end)
> 
> 
>-macro equalityComparisonOp(name, op, integerComparison)
>-    llintOpWithReturn(op_%name%, op, macro (size, get, dispatch, return)
>+macro equalityComparisonOp(opcodeName, opcodeStruct, integerComparison)
>+    llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t0)
>         get(m_lhs, t2)
>         loadConstantOrVariableInt32(size, t0, t1, .slow)
>@@ -752,14 +752,14 @@ macro equalityComparisonOp(name, op, int
>         return(t0)
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
> 
> 
>-macro equalNullComparisonOp(name, op, fn)
>-    llintOpWithReturn(name, op, macro (size, get, dispatch, return)
>+macro equalNullComparisonOp(opcodeName, opcodeStruct, fn)
>+    llintOpWithReturn(opcodeName, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_operand, t0)
>         loadq [cfr, t0, 8], t0
>         btqnz t0, tagMask, .immediate
>@@ -799,8 +799,8 @@ llintOpWithReturn(op_is_undefined_or_nul
> end)
> 
> 
>-macro strictEqOp(name, op, equalityOperation)
>-    llintOpWithReturn(op_%name%, op, macro (size, get, dispatch, return)
>+macro strictEqOp(opcodeName, opcodeStruct, equalityOperation)
>+    llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t0)
>         get(m_lhs, t2)
>         loadConstantOrVariable(size, t0, t1)
>@@ -819,7 +819,7 @@ macro strictEqOp(name, op, equalityOpera
>         return(t0)
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -833,8 +833,8 @@ strictEqOp(nstricteq, OpNstricteq,
>     macro (left, right, result) cqneq left, right, result end)
> 
> 
>-macro strictEqualityJumpOp(name, op, equalityOperation)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro strictEqualityJumpOp(opcodeName, opcodeStruct, equalityOperation)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_lhs, t2)
>         get(m_rhs, t3)
>         loadConstantOrVariable(size, t2, t0)
>@@ -852,10 +852,10 @@ macro strictEqualityJumpOp(name, op, equ
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
>@@ -869,8 +869,8 @@ strictEqualityJumpOp(jnstricteq, OpJnstr
>     macro (left, right, target) bqneq left, right, target end)
> 
> 
>-macro preOp(name, op, arithmeticOperation)
>-    llintOp(op_%name%, op, macro (size, get, dispatch)
>+macro preOp(opcodeName, opcodeStruct, arithmeticOperation)
>+    llintOp(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch)
>         get(m_srcDst, t0)
>         loadq [cfr, t0, 8], t1
>         bqb t1, tagTypeNumber, .slow
>@@ -879,7 +879,7 @@ macro preOp(name, op, arithmeticOperatio
>         storeq t1, [cfr, t0, 8]
>         dispatch()
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -929,19 +929,19 @@ llintOpWithMetadata(op_negate, OpNegate,
>     get(m_operand, t0)
>     loadConstantOrVariable(size, t0, t3)
>     metadata(t1, t2)
>-    loadis OpNegate::Metadata::m_arithProfile[t1], t2
>+    loadi OpNegate::Metadata::m_arithProfile + ArithProfile::m_bits[t1], t2
>     bqb t3, tagTypeNumber, .opNegateNotInt
>     btiz t3, 0x7fffffff, .opNegateSlow
>     negi t3
>     orq tagTypeNumber, t3
>     ori ArithProfileInt, t2
>-    storei t2, OpNegate::Metadata::m_arithProfile[t1]
>+    storei t2, OpNegate::Metadata::m_arithProfile + ArithProfile::m_bits[t1]
>     return(t3)
> .opNegateNotInt:
>     btqz t3, tagTypeNumber, .opNegateSlow
>     xorq 0x8000000000000000, t3
>     ori ArithProfileNumber, t2
>-    storei t2, OpNegate::Metadata::m_arithProfile[t1]
>+    storei t2, OpNegate::Metadata::m_arithProfile + ArithProfile::m_bits[t1]
>     return(t3)
> 
> .opNegateSlow:
>@@ -950,12 +950,12 @@ llintOpWithMetadata(op_negate, OpNegate,
> end)
> 
> 
>-macro binaryOpCustomStore(name, op, integerOperationAndStore, doubleOperation)
>-    llintOpWithMetadata(op_%name%, op, macro (size, get, dispatch, metadata, return)
>+macro binaryOpCustomStore(opcodeName, opcodeStruct, integerOperationAndStore, doubleOperation)
>+    llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
>         metadata(t5, t0)
> 
>         macro profile(type)
>-            ori type, %op%::Metadata::m_arithProfile[t5]
>+            ori type, %opcodeStruct%::Metadata::m_arithProfile + ArithProfile::m_bits[t5]
>         end
> 
>         get(m_rhs, t0)
>@@ -1007,7 +1007,7 @@ macro binaryOpCustomStore(name, op, inte
>         dispatch()
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -1052,8 +1052,8 @@ binaryOpCustomStore(mul, OpMul,
>     macro (left, right) muld left, right end)
> 
> 
>-macro binaryOp(name, op, integerOperation, doubleOperation)
>-    binaryOpCustomStore(name, op,
>+macro binaryOp(opcodeName, opcodeStruct, integerOperation, doubleOperation)
>+    binaryOpCustomStore(opcodeName, opcodeStruct,
>         macro (left, right, slow, index)
>             integerOperation(left, right, slow)
>             orq tagTypeNumber, right
>@@ -1083,8 +1083,8 @@ llintOpWithReturn(op_unsigned, OpUnsigne
> end)
> 
> 
>-macro commonBitOp(opKind, name, op, operation)
>-    opKind(op_%name%, op, macro (size, get, dispatch, return)
>+macro commonBitOp(opKind, opcodeName, opcodeStruct, operation)
>+    opKind(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_rhs, t0)
>         get(m_lhs, t2)
>         loadConstantOrVariable(size, t0, t1)
>@@ -1096,17 +1096,17 @@ macro commonBitOp(opKind, name, op, oper
>         return(t0)
> 
>     .slow:
>-        callSlowPath(_slow_path_%name%)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
> 
>-macro bitOp(name, op, operation)
>-    commonBitOp(llintOpWithReturn, name, op, operation)
>+macro bitOp(opcodeName, opcodeStruct, operation)
>+    commonBitOp(llintOpWithReturn, opcodeName, opcodeStruct, operation)
> end
> 
>-macro bitOpProfiled(name, op, operation)
>-    commonBitOp(llintOpWithProfile, name, op, operation)
>+macro bitOpProfiled(opcodeName, opcodeStruct, operation)
>+    commonBitOp(llintOpWithProfile, opcodeName, opcodeStruct, operation)
> end
> 
> bitOp(lshift, OpLshift,
>@@ -1269,7 +1269,7 @@ llintOpWithMetadata(op_get_by_id_direct,
>     get(m_base, t0)
>     loadConstantOrVariableCell(size, t0, t3, .opGetByIdDirectSlow)
>     loadi JSCell::m_structureID[t3], t1
>-    loadi OpGetByIdDirect::Metadata::m_structure[t2], t0
>+    loadi OpGetByIdDirect::Metadata::m_structureID[t2], t0
>     bineq t0, t1, .opGetByIdDirectSlow
>     loadi OpGetByIdDirect::Metadata::m_offset[t2], t1
>     loadPropertyAtVariableOffset(t1, t3, t0)
>@@ -1291,7 +1291,7 @@ llintOpWithMetadata(op_get_by_id, OpGetB
> .opGetByIdDefault:
>     bbneq t1, constexpr GetByIdMode::Default, .opGetByIdProtoLoad
>     loadi JSCell::m_structureID[t3], t1
>-    loadi OpGetById::Metadata::m_modeMetadata.defaultMode.structure[t2], t0
>+    loadi OpGetById::Metadata::m_modeMetadata.defaultMode.structureID[t2], t0
>     bineq t0, t1, .opGetByIdSlow
>     loadis OpGetById::Metadata::m_modeMetadata.defaultMode.cachedOffset[t2], t1
>     loadPropertyAtVariableOffset(t1, t3, t0)
>@@ -1301,7 +1301,7 @@ llintOpWithMetadata(op_get_by_id, OpGetB
> .opGetByIdProtoLoad:
>     bbneq t1, constexpr GetByIdMode::ProtoLoad, .opGetByIdArrayLength
>     loadi JSCell::m_structureID[t3], t1
>-    loadi OpGetById::Metadata::m_modeMetadata.protoLoadMode.structure[t2], t3
>+    loadi OpGetById::Metadata::m_modeMetadata.protoLoadMode.structureID[t2], t3
>     bineq t3, t1, .opGetByIdSlow
>     loadis OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedOffset[t2], t1
>     loadp OpGetById::Metadata::m_modeMetadata.protoLoadMode.cachedSlot[t2], t3
>@@ -1324,7 +1324,7 @@ llintOpWithMetadata(op_get_by_id, OpGetB
> 
> .opGetByIdUnset:
>     loadi JSCell::m_structureID[t3], t1
>-    loadi OpGetById::Metadata::m_modeMetadata.unsetMode.structure[t2], t0
>+    loadi OpGetById::Metadata::m_modeMetadata.unsetMode.structureID[t2], t0
>     bineq t0, t1, .opGetByIdSlow
>     valueProfile(OpGetById, t2, ValueUndefined)
>     return(ValueUndefined)
>@@ -1339,7 +1339,7 @@ llintOpWithMetadata(op_put_by_id, OpPutB
>     get(m_base, t3)
>     loadConstantOrVariableCell(size, t3, t0, .opPutByIdSlow)
>     metadata(t5, t2)
>-    loadis OpPutById::Metadata::m_oldStructure[t5], t2
>+    loadi OpPutById::Metadata::m_oldStructureID[t5], t2
>     bineq t2, JSCell::m_structureID[t0], .opPutByIdSlow
> 
>     # At this point, we have:
>@@ -1347,7 +1347,7 @@ llintOpWithMetadata(op_put_by_id, OpPutB
>     # t2 -> current structure ID
>     # t5 -> metadata
> 
>-    loadi OpPutById::Metadata::m_newStructure[t5], t1
>+    loadi OpPutById::Metadata::m_newStructureID[t5], t1
>     btiz t1, .opPutByIdNotTransition
> 
>     # This is the transition case. t1 holds the new structureID. t2 holds the old structure ID.
>@@ -1380,7 +1380,7 @@ llintOpWithMetadata(op_put_by_id, OpPutB
> 
> .opPutByIdTransitionChainDone:
>     # Reload the new structure, since we clobbered it above.
>-    loadi OpPutById::Metadata::m_newStructure[t5], t1
>+    loadi OpPutById::Metadata::m_newStructureID[t5], t1
> 
> .opPutByIdTransitionDirect:
>     storei t1, JSCell::m_structureID[t0]
>@@ -1574,8 +1574,8 @@ llintOpWithMetadata(op_get_by_val, OpGet
> end)
> 
> 
>-macro putByValOp(name, op)
>-    llintOpWithMetadata(op_%name%, op, macro (size, get, dispatch, metadata, return)
>+macro putByValOp(opcodeName, opcodeStruct)
>+    llintOpWithMetadata(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, metadata, return)
>         macro contiguousPutByVal(storeCallback)
>             biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], .outOfBounds
>         .storeResult:
>@@ -1585,7 +1585,7 @@ macro putByValOp(name, op)
> 
>         .outOfBounds:
>             biaeq t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.vectorLength[t0], .opPutByValOutOfBounds
>-            storeb 1, %op%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>+            storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>             addi 1, t3, t2
>             storei t2, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0]
>             jmp .storeResult
>@@ -1595,7 +1595,7 @@ macro putByValOp(name, op)
>         loadConstantOrVariableCell(size, t0, t1, .opPutByValSlow)
>         move t1, t2
>         metadata(t5, t0)
>-        arrayProfile(%op%::Metadata::m_arrayProfile, t2, t5, t0)
>+        arrayProfile(%opcodeStruct%::Metadata::m_arrayProfile, t2, t5, t0)
>         get(m_property, t0)
>         loadConstantOrVariableInt32(size, t0, t3, .opPutByValSlow)
>         sxi2q t3, t3
>@@ -1650,7 +1650,7 @@ macro putByValOp(name, op)
>         dispatch()
> 
>     .opPutByValArrayStorageEmpty:
>-        storeb 1, %op%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>+        storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_mayStoreToHole[t5]
>         addi 1, ArrayStorage::m_numValuesInVector[t0]
>         bib t3, -sizeof IndexingHeader + IndexingHeader::u.lengths.publicLength[t0], .opPutByValArrayStorageStoreResult
>         addi 1, t3, t1
>@@ -1658,9 +1658,9 @@ macro putByValOp(name, op)
>         jmp .opPutByValArrayStorageStoreResult
> 
>     .opPutByValOutOfBounds:
>-        storeb 1, %op%::Metadata::m_arrayProfile.m_outOfBounds[t5]
>+        storeb 1, %opcodeStruct%::Metadata::m_arrayProfile.m_outOfBounds[t5]
>     .opPutByValSlow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -1670,8 +1670,8 @@ putByValOp(put_by_val, OpPutByVal)
> putByValOp(put_by_val_direct, OpPutByValDirect)
> 
> 
>-macro llintJumpTrueOrFalseOp(name, op, conditionOp)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro llintJumpTrueOrFalseOp(opcodeName, opcodeStruct, conditionOp)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_condition, t1)
>         loadConstantOrVariable(size, t1, t0)
>         btqnz t0, ~0xf, .slow
>@@ -1679,17 +1679,17 @@ macro llintJumpTrueOrFalseOp(name, op, c
>         dispatch()
> 
>     .target:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
> 
> 
>-macro equalNullJumpOp(name, op, cellHandler, immediateHandler)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro equalNullJumpOp(opcodeName, opcodeStruct, cellHandler, immediateHandler)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_value, t0)
>         assertNotConstant(size, t0)
>         loadq [cfr, t0, 8], t0
>@@ -1699,7 +1699,7 @@ macro equalNullJumpOp(name, op, cellHand
>         dispatch()
> 
>     .target:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .immediate:
>         andq ~TagBitUndefined, t0
>@@ -1731,7 +1731,7 @@ equalNullJumpOp(jneq_null, OpJneqNull,
> 
> llintOpWithMetadata(op_jneq_ptr, OpJneqPtr, macro (size, get, dispatch, metadata, return)
>     get(m_value, t0)
>-    get(m_specialPointer, t1)
>+    getu(size, OpJneqPtr, m_specialPointer, t1)
>     loadp CodeBlock[cfr], t2
>     loadp CodeBlock::m_globalObject[t2], t2
>     loadp JSGlobalObject::m_specialPointers[t2, t1, PtrSize], t1
>@@ -1741,13 +1741,13 @@ llintOpWithMetadata(op_jneq_ptr, OpJneqP
> .opJneqPtrTarget:
>     metadata(t5, t0)
>     storeb 1, OpJneqPtr::Metadata::m_hasJumped[t5]
>-    get(m_target, t0)
>+    get(m_targetLabel, t0)
>     jumpImpl(t0)
> end)
> 
> 
>-macro compareJumpOp(name, op, integerCompare, doubleCompare)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro compareJumpOp(opcodeName, opcodeStruct, integerCompare, doubleCompare)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_lhs, t2)
>         get(m_rhs, t3)
>         loadConstantOrVariable(size, t2, t0)
>@@ -1781,17 +1781,17 @@ macro compareJumpOp(name, op, integerCom
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
> 
> 
>-macro equalityJumpOp(name, op, integerComparison)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro equalityJumpOp(opcodeName, opcodeStruct, integerComparison)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_lhs, t2)
>         get(m_rhs, t3)
>         loadConstantOrVariableInt32(size, t2, t0, .slow)
>@@ -1800,17 +1800,17 @@ macro equalityJumpOp(name, op, integerCo
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
> 
>     .slow:
>-        callSlowPath(_llint_slow_path_%name%)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         nextInstruction()
>     end)
> end
> 
> 
>-macro compareUnsignedJumpOp(name, op, integerCompareMacro)
>-    llintOpWithJump(op_%name%, op, macro (size, get, jump, dispatch)
>+macro compareUnsignedJumpOp(opcodeName, opcodeStruct, integerCompareMacro)
>+    llintOpWithJump(op_%opcodeName%, opcodeStruct, macro (size, get, jump, dispatch)
>         get(m_lhs, t2)
>         get(m_rhs, t3)
>         loadConstantOrVariable(size, t2, t0)
>@@ -1819,13 +1819,13 @@ macro compareUnsignedJumpOp(name, op, in
>         dispatch()
> 
>     .jumpTarget:
>-        jump(m_target)
>+        jump(m_targetLabel)
>     end)
> end
> 
> 
>-macro compareUnsignedOp(name, op, integerCompareAndSet)
>-    llintOpWithReturn(op_%name%, op, macro (size, get, dispatch, return)
>+macro compareUnsignedOp(opcodeName, opcodeStruct, integerCompareAndSet)
>+    llintOpWithReturn(op_%opcodeName%, opcodeStruct, macro (size, get, dispatch, return)
>         get(m_lhs, t2)
>         get(m_rhs,  t0)
>         loadConstantOrVariable(size, t0, t1)
>@@ -1839,7 +1839,7 @@ end
> 
> llintOpWithJump(op_switch_imm, OpSwitchImm, macro (size, get, jump, dispatch)
>     get(m_scrutinee, t2)
>-    get(m_tableIndex, t3)
>+    getu(size, OpSwitchImm, m_tableIndex, t3)
>     loadConstantOrVariable(size, t2, t1)
>     loadp CodeBlock[cfr], t2
>     loadp CodeBlock::m_rareData[t2], t2
>@@ -1867,7 +1867,7 @@ end)
> 
> llintOpWithJump(op_switch_char, OpSwitchChar, macro (size, get, jump, dispatch)
>     get(m_scrutinee, t2)
>-    get(m_tableIndex, t3)
>+    getu(size, OpSwitchChar, m_tableIndex, t3)
>     loadConstantOrVariable(size, t2, t1)
>     loadp CodeBlock[cfr], t2
>     loadp CodeBlock::m_rareData[t2], t2
>@@ -1903,49 +1903,49 @@ end)
> 
> 
> # we assume t5 contains the metadata, and we should not scratch that
>-macro arrayProfileForCall(op, getu)
>+macro arrayProfileForCall(opcodeStruct, getu)
>     getu(m_argv, t3)
>     negp t3
>     loadq ThisArgumentOffset[cfr, t3, 8], t0
>     btqnz t0, tagMask, .done
>     loadi JSCell::m_structureID[t0], t3
>-    storei t3, %op%::Metadata::m_arrayProfile.m_lastSeenStructureID[t5]
>+    storei t3, %opcodeStruct%::Metadata::m_arrayProfile.m_lastSeenStructureID[t5]
> .done:
> end
> 
>-macro commonCallOp(name, slowPath, op, prepareCall, prologue)
>-    llintOpWithMetadata(name, op, macro (size, get, dispatch, metadata, return)
>+macro commonCallOp(opcodeName, slowPath, opcodeStruct, prepareCall, prologue)
>+    llintOpWithMetadata(opcodeName, opcodeStruct, macro (size, get, dispatch, metadata, return)
>         metadata(t5, t0)
> 
>         prologue(macro (fieldName, dst)
>-            getu(size, op, fieldName, dst)
>+            getu(size, opcodeStruct, fieldName, dst)
>         end, metadata)
> 
>         get(m_callee, t0)
>-        loadp %op%::Metadata::m_callLinkInfo.callee[t5], t2
>+        loadp %opcodeStruct%::Metadata::m_callLinkInfo.callee[t5], t2
>         loadConstantOrVariable(size, t0, t3)
>         bqneq t3, t2, .opCallSlow
>-        getu(size, op, m_argv, t3)
>+        getu(size, opcodeStruct, m_argv, t3)
>         lshifti 3, t3
>         negp t3
>         addp cfr, t3
>         storeq t2, Callee[t3]
>-        getu(size, op, m_argc, t2)
>+        getu(size, opcodeStruct, m_argc, t2)
>         storei PC, ArgumentCount + TagOffset[cfr]
>         storei t2, ArgumentCount + PayloadOffset[t3]
>         move t3, sp
>         if POISON
>             loadp _g_JITCodePoison, t2
>-            xorp %op%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2
>+            xorp %opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2
>             prepareCall(t2, t1, t3, t4, JSEntryPtrTag)
>-            callTargetFunction(size, op, dispatch, t2, JSEntryPtrTag)
>+            callTargetFunction(size, opcodeStruct, dispatch, t2, JSEntryPtrTag)
>         else
>-            prepareCall(%op%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2, t3, t4, JSEntryPtrTag)
>-            callTargetFunction(size, op, dispatch, %op%::Metadata::m_callLinkInfo.machineCodeTarget[t5], JSEntryPtrTag)
>+            prepareCall(%opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], t2, t3, t4, JSEntryPtrTag)
>+            callTargetFunction(size, opcodeStruct, dispatch, %opcodeStruct%::Metadata::m_callLinkInfo.machineCodeTarget[t5], JSEntryPtrTag)
>         end
> 
>     .opCallSlow:
>-        slowPathForCall(size, op, dispatch, slowPath, prepareCall)
>+        slowPathForCall(size, opcodeStruct, dispatch, slowPath, prepareCall)
>     end)
> end
> 
>@@ -2170,7 +2170,7 @@ llintOpWithMetadata(op_resolve_scope, Op
>         return(t0)
>     end
> 
>-    loadp OpResolveScope::Metadata::m_resolveType[t5], t0
>+    loadi OpResolveScope::Metadata::m_resolveType[t5], t0
> 
> #rGlobalProperty:
>     bineq t0, GlobalProperty, .rGlobalVar
>@@ -2218,11 +2218,11 @@ llintOpWithMetadata(op_resolve_scope, Op
> end)
> 
> 
>-macro loadWithStructureCheck(op, get, slowPath)
>+macro loadWithStructureCheck(opcodeStruct, get, slowPath)
>     get(m_scope, t0)
>     loadq [cfr, t0, 8], t0
>     loadStructureWithScratch(t0, t2, t1, t3)
>-    loadp %op%::Metadata::m_structure[t5], t1
>+    loadp %opcodeStruct%::Metadata::m_structure[t5], t1
>     bpneq t2, t1, slowPath
> end
> 
>@@ -2251,7 +2251,7 @@ llintOpWithMetadata(op_get_from_scope, O
>         return(t0)
>     end
> 
>-    loadi OpGetFromScope::Metadata::m_getPutInfo[t5], t0
>+    loadi OpGetFromScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
>     andi ResolveTypeMask, t0
> 
> #gGlobalProperty:
>@@ -2309,7 +2309,7 @@ llintOpWithMetadata(op_put_to_scope, OpP
>     macro putProperty()
>         get(m_value, t1)
>         loadConstantOrVariable(size, t1, t2)
>-        loadis OpPutToScope::Metadata::m_operand[t5], t1
>+        loadp OpPutToScope::Metadata::m_operand[t5], t1
>         storePropertyAtVariableOffset(t1, t0, t2)
>     end
> 
>@@ -2325,7 +2325,7 @@ llintOpWithMetadata(op_put_to_scope, OpP
>     macro putClosureVar()
>         get(m_value, t1)
>         loadConstantOrVariable(size, t1, t2)
>-        loadis OpPutToScope::Metadata::m_operand[t5], t1
>+        loadp OpPutToScope::Metadata::m_operand[t5], t1
>         storeq t2, JSLexicalEnvironment_variables[t0, t1, 8]
>     end
> 
>@@ -2336,12 +2336,12 @@ llintOpWithMetadata(op_put_to_scope, OpP
>         btpz t3, .noVariableWatchpointSet
>         notifyWrite(t3, .pDynamic)
>     .noVariableWatchpointSet:
>-        loadis OpPutToScope::Metadata::m_operand[t5], t1
>+        loadp OpPutToScope::Metadata::m_operand[t5], t1
>         storeq t2, JSLexicalEnvironment_variables[t0, t1, 8]
>     end
> 
>     macro checkTDZInGlobalPutToScopeIfNecessary()
>-        loadis OpPutToScope::Metadata::m_getPutInfo[t5], t0
>+        loadi OpPutToScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
>         andi InitializationModeMask, t0
>         rshifti InitializationModeShift, t0
>         bineq t0, NotInitialization, .noNeedForTDZCheck
>@@ -2352,7 +2352,7 @@ llintOpWithMetadata(op_put_to_scope, OpP
>     end
> 
>     metadata(t5, t0)
>-    loadi OpPutToScope::Metadata::m_getPutInfo[t5], t0
>+    loadi OpPutToScope::Metadata::m_getPutInfo + GetPutInfo::m_operand[t5], t0
>     andi ResolveTypeMask, t0
> 
> #pLocalClosureVar:
>@@ -2466,7 +2466,7 @@ llintOpWithMetadata(op_profile_type, OpP
>     loadp TypeProfilerLog::m_currentLogEntryPtr[t1], t2
> 
>     # t0 is holding the JSValue argument.
>-    get(m_target, t3)
>+    get(m_targetVirtualRegister, t3)
>     loadConstantOrVariable(size, t3, t0)
> 
>     bqeq t0, ValueEmpty, .opProfileTypeDone
>Index: Source/JavaScriptCore/llint/LowLevelInterpreter.asm
>===================================================================
>--- Source/JavaScriptCore/llint/LowLevelInterpreter.asm	(revision 240135)
>+++ Source/JavaScriptCore/llint/LowLevelInterpreter.asm	(working copy)
>@@ -285,36 +285,36 @@ else
>     end
> end
> 
>-macro dispatch(advance)
>-    addp advance, PC
>+macro dispatch(advanceReg)
>+    addp advanceReg, PC
>     nextInstruction()
> end
> 
>-macro dispatchIndirect(offset)
>-    dispatch(offset)
>+macro dispatchIndirect(offsetReg)
>+    dispatch(offsetReg)
> end
> 
>-macro dispatchOp(size, op)
>+macro dispatchOp(size, opcodeName)
>     macro dispatchNarrow()
>-        dispatch(constexpr %op%_length)
>+        dispatch(constexpr %opcodeName%_length)
>     end
> 
>     macro dispatchWide()
>-        dispatch(constexpr %op%_length * 4 + 1)
>+        dispatch(constexpr %opcodeName%_length * 4 + 1)
>     end
> 
>     size(dispatchNarrow, dispatchWide, macro (dispatch) dispatch() end)
> end
> 
>-macro getu(size, op, fieldName, dst)
>+macro getu(size, opcodeStruct, fieldName, dst)
>     size(getuOperandNarrow, getuOperandWide, macro (getu)
>-        getu(op, fieldName, dst)
>+        getu(opcodeStruct, fieldName, dst)
>     end)
> end
> 
>-macro get(size, op, fieldName, dst)
>+macro get(size, opcodeStruct, fieldName, dst)
>     size(getOperandNarrow, getOperandWide, macro (get)
>-        get(op, fieldName, dst)
>+        get(opcodeStruct, fieldName, dst)
>     end)
> end
> 
>@@ -334,9 +334,9 @@ macro metadata(size, opcode, dst, scratc
>     addp metadataTable, dst # return &metadataTable[offset]
> end
> 
>-macro jumpImpl(target)
>-    btiz target, .outOfLineJumpTarget
>-    dispatchIndirect(target)
>+macro jumpImpl(targetOffsetReg)
>+    btiz targetOffsetReg, .outOfLineJumpTarget
>+    dispatchIndirect(targetOffsetReg)
> .outOfLineJumpTarget:
>     callSlowPath(_llint_slow_path_out_of_line_jump_target)
>     nextInstruction()
>@@ -358,39 +358,39 @@ macro op(l, fn)
>     end)
> end
> 
>-macro llintOp(name, op, fn)
>-    commonOp(llint_%name%, traceExecution, macro(size)
>+macro llintOp(opcodeName, opcodeStruct, fn)
>+    commonOp(llint_%opcodeName%, traceExecution, macro(size)
>         macro getImpl(fieldName, dst)
>-            get(size, op, fieldName, dst)
>+            get(size, opcodeStruct, fieldName, dst)
>         end
> 
>         macro dispatchImpl()
>-            dispatchOp(size, name)
>+            dispatchOp(size, opcodeName)
>         end
> 
>         fn(size, getImpl, dispatchImpl)
>     end)
> end
> 
>-macro llintOpWithReturn(name, op, fn)
>-    llintOp(name, op, macro(size, get, dispatch)
>+macro llintOpWithReturn(opcodeName, opcodeStruct, fn)
>+    llintOp(opcodeName, opcodeStruct, macro(size, get, dispatch)
>         makeReturn(get, dispatch, macro (return)
>             fn(size, get, dispatch, return)
>         end)
>     end)
> end
> 
>-macro llintOpWithMetadata(name, op, fn)
>-    llintOpWithReturn(name, op, macro (size, get, dispatch, return)
>+macro llintOpWithMetadata(opcodeName, opcodeStruct, fn)
>+    llintOpWithReturn(opcodeName, opcodeStruct, macro (size, get, dispatch, return)
>         macro meta(dst, scratch)
>-            metadata(size, op, dst, scratch)
>+            metadata(size, opcodeStruct, dst, scratch)
>         end
>         fn(size, get, dispatch, meta, return)
>     end)
> end
> 
>-macro llintOpWithJump(name, op, impl)
>-    llintOpWithMetadata(name, op, macro(size, get, dispatch, metadata, return)
>+macro llintOpWithJump(opcodeName, opcodeStruct, impl)
>+    llintOpWithMetadata(opcodeName, opcodeStruct, macro(size, get, dispatch, metadata, return)
>         macro jump(fieldName)
>             get(fieldName, t0)
>             jumpImpl(t0)
>@@ -400,9 +400,9 @@ macro llintOpWithJump(name, op, impl)
>     end)
> end
> 
>-macro llintOpWithProfile(name, op, fn)
>-    llintOpWithMetadata(name, op, macro(size, get, dispatch, metadata, return)
>-        makeReturnProfiled(op, get, metadata, dispatch, macro (returnProfiled)
>+macro llintOpWithProfile(opcodeName, opcodeStruct, fn)
>+    llintOpWithMetadata(opcodeName, opcodeStruct, macro(size, get, dispatch, metadata, return)
>+        makeReturnProfiled(opcodeStruct, get, metadata, dispatch, macro (returnProfiled)
>             fn(size, get, dispatch, returnProfiled)
>         end)
>     end)
>@@ -895,14 +895,14 @@ macro traceExecution()
>     end
> end
> 
>-macro callTargetFunction(size, op, dispatch, callee, callPtrTag)
>+macro callTargetFunction(size, opcodeStruct, dispatch, callee, callPtrTag)
>     if C_LOOP
>         cloopCallJSFunction callee
>     else
>         call callee, callPtrTag
>     end
>     restoreStackPointerAfterCall()
>-    dispatchAfterCall(size, op, dispatch)
>+    dispatchAfterCall(size, opcodeStruct, dispatch)
> end
> 
> macro prepareForRegularCall(callee, temp1, temp2, temp3, callPtrTag)
>@@ -915,7 +915,7 @@ macro prepareForTailCall(callee, temp1, 
> 
>     loadi PayloadOffset + ArgumentCount[cfr], temp2
>     loadp CodeBlock[cfr], temp1
>-    loadp CodeBlock::m_numParameters[temp1], temp1
>+    loadi CodeBlock::m_numParameters[temp1], temp1
>     bilteq temp1, temp2, .noArityFixup
>     move temp1, temp2
> 
>@@ -970,7 +970,7 @@ macro prepareForTailCall(callee, temp1, 
>     jmp callee, callPtrTag
> end
> 
>-macro slowPathForCall(size, op, dispatch, slowPath, prepareCall)
>+macro slowPathForCall(size, opcodeStruct, dispatch, slowPath, prepareCall)
>     callCallSlowPath(
>         slowPath,
>         # Those are r0 and r1
>@@ -979,7 +979,7 @@ macro slowPathForCall(size, op, dispatch
>             move calleeFramePtr, sp
>             prepareCall(callee, t2, t3, t4, SlowPathPtrTag)
>         .dontUpdateSP:
>-            callTargetFunction(size, op, dispatch, callee, SlowPathPtrTag)
>+            callTargetFunction(size, opcodeStruct, dispatch, callee, SlowPathPtrTag)
>         end)
> end
> 
>@@ -1192,8 +1192,8 @@ macro functionInitialization(profileArgS
>     loadp CodeBlock::m_argumentValueProfiles + RefCountedArray::m_data[t1], t3
>     btpz t3, .argumentProfileDone # When we can't JIT, we don't allocate any argument value profiles.
>     mulp sizeof ValueProfile, t0, t2 # Aaaaahhhh! Need strength reduction!
>-    lshiftp 3, t0
>-    addp t2, t3
>+    lshiftp 3, t0 # offset of last JSValue arguments on the stack.
>+    addp t2, t3 # pointer to end of ValueProfile array in CodeBlock::m_argumentValueProfiles.
> .argumentProfileLoop:
>     if JSVALUE64
>         loadq ThisArgumentOffset - 8 + profileArgSkip * 8[cfr, t0], t2
>@@ -1433,9 +1433,9 @@ end
> 
> 
> # Value-representation-agnostic code.
>-macro slowPathOp(op)
>-    llintOp(op_%op%, unused, macro (unused, unused, dispatch)
>-        callSlowPath(_slow_path_%op%)
>+macro slowPathOp(opcodeName)
>+    llintOp(op_%opcodeName%, unused, macro (unused, unused, dispatch)
>+        callSlowPath(_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -1481,9 +1481,9 @@ slowPathOp(to_index_string)
> slowPathOp(typeof)
> slowPathOp(unreachable)
> 
>-macro llintSlowPathOp(op)
>-    llintOp(op_%op%, unused, macro (unused, unused, dispatch)
>-        callSlowPath(_llint_slow_path_%op%)
>+macro llintSlowPathOp(opcodeName)
>+    llintOp(op_%opcodeName%, unused, macro (unused, unused, dispatch)
>+        callSlowPath(_llint_slow_path_%opcodeName%)
>         dispatch()
>     end)
> end
>@@ -1538,7 +1538,7 @@ compareUnsignedOp(beloweq, OpBeloweq,
> 
> 
> llintOpWithJump(op_jmp, OpJmp, macro (size, get, jump, dispatch)
>-    jump(m_target)
>+    jump(m_targetLabel)
> end)
> 
> 
>@@ -1674,8 +1674,8 @@ commonCallOp(op_call, _llint_slow_path_c
> end)
> 
> 
>-macro callOp(name, op, prepareCall, fn)
>-    commonCallOp(op_%name%, _llint_slow_path_%name%, op, prepareCall, fn)
>+macro callOp(opcodeName, opcodeStruct, prepareCall, fn)
>+    commonCallOp(op_%opcodeName%, _llint_slow_path_%opcodeName%, opcodeStruct, prepareCall, fn)
> end
> 
> 
>@@ -1690,7 +1690,7 @@ end)
> callOp(construct, OpConstruct, prepareForRegularCall, macro (getu, metadata) end)
> 
> 
>-macro doCallVarargs(size, op, dispatch, frameSlowPath, slowPath, prepareCall)
>+macro doCallVarargs(size, opcodeStruct, dispatch, frameSlowPath, slowPath, prepareCall)
>     callSlowPath(frameSlowPath)
>     branchIfException(_llint_throw_from_slow_path_trampoline)
>     # calleeFrame in r1
>@@ -1705,7 +1705,7 @@ macro doCallVarargs(size, op, dispatch, 
>             subp r1, CallerFrameAndPCSize, sp
>         end
>     end
>-    slowPathForCall(size, op, dispatch, slowPath, prepareCall)
>+    slowPathForCall(size, opcodeStruct, dispatch, slowPath, prepareCall)
> end
> 
> 
>Index: Source/JavaScriptCore/runtime/CommonSlowPaths.cpp
>===================================================================
>--- Source/JavaScriptCore/runtime/CommonSlowPaths.cpp	(revision 240135)
>+++ Source/JavaScriptCore/runtime/CommonSlowPaths.cpp	(working copy)
>@@ -125,8 +125,8 @@ namespace JSC {
>         bool bCondition = (condition);                         \
>         CHECK_EXCEPTION();                                  \
>         if (bCondition)                                        \
>-            pc = bytecode.m_target \
>-                ? reinterpret_cast<const Instruction*>(reinterpret_cast<const uint8_t*>(pc) + bytecode.m_target) \
>+            pc = bytecode.m_targetLabel \
>+                ? reinterpret_cast<const Instruction*>(reinterpret_cast<const uint8_t*>(pc) + bytecode.m_targetLabel) \
>                 : exec->codeBlock()->outOfLineJumpTarget(pc);                              \
>         else                                                      \
>             pc = reinterpret_cast<const Instruction*>(reinterpret_cast<const uint8_t*>(pc) + pc->size()); \
>Index: Source/JavaScriptCore/runtime/GetPutInfo.h
>===================================================================
>--- Source/JavaScriptCore/runtime/GetPutInfo.h	(revision 240135)
>+++ Source/JavaScriptCore/runtime/GetPutInfo.h	(working copy)
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2015-2018 Apple Inc. All Rights Reserved.
>+ * Copyright (C) 2015-2019 Apple Inc. All Rights Reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -38,7 +38,7 @@ enum ResolveMode {
>     DoNotThrowIfNotFound
> };
> 
>-enum ResolveType {
>+enum ResolveType : unsigned {
>     // Lexical scope guaranteed a certain type of variable access.
>     GlobalProperty,
>     GlobalVar,
>@@ -210,6 +210,8 @@ public:
>     static const unsigned modeBits = ((1 << 30) - 1) & ~initializationBits & ~typeBits;
>     static_assert((modeBits & initializationBits & typeBits) == 0x0, "There should be no intersection between ResolveMode ResolveType and InitializationMode");
> 
>+    GetPutInfo() = default;
>+
>     GetPutInfo(ResolveMode resolveMode, ResolveType resolveType, InitializationMode initializationMode)
>         : m_operand((resolveMode << modeShift) | (static_cast<unsigned>(initializationMode) << initializationShift) | resolveType)
>     {
>@@ -228,7 +230,9 @@ public:
>     void dump(PrintStream&) const;
> 
> private:
>-    Operand m_operand;
>+    Operand m_operand { 0 };
>+
>+    friend class JSC::LLIntOffsetsExtractor;
> };
> 
> enum GetOrPut { Get, Put };

Flags:

ysuzuki: review+

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Attachments on bug 193557: 359424 | 359432