Attachment 359019 Details for Bug 193080 – Patch

[patch] Patch

bug-193080-20190113203438.patch (text/plain), 83.02 KB, created by Myles C. Maxfield on 2019-01-13 20:34:57 PST

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Creator: Myles C. Maxfield

Created: 2019-01-13 20:34:57 PST

Size: 83.02 KB

patch

obsolete

>Subversion Revision: 239912
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 6610998eaf2b9fa0c9eed0396055348f538b73d5..e16a53ced2f5fe1413c1120d7d58a22d08271ac3 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,71 @@
>+2019-01-13  Myles C. Maxfield  <mmaxfield@apple.com>
>+
>+        [WHLSL] Implement the Type Checker
>+        https://bugs.webkit.org/show_bug.cgi?id=193080
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This is a translation of https://github.com/gpuweb/WHLSL/blob/master/Source/Checker.mjs into C++.
>+
>+        The Checker passes types between nested expressions. An inner expression figures out what type it is, and
>+        passes that information up to an outer expression. This is done via reading/writing into a HashMap,
>+        because all the type information needs to be saved so that the Metal codegen can emit the correct types.
>+
>+        These types can have two forms: A regular type (like "int[]") or a ResolvableType. ResolvableTypes
>+        represent literals, since a literal needs to know its context before it knows what type it should be. So,
>+        if you have a function like "void foo(int x)" and you have a call like "foo(3)", the 3's ResolvableType
>+        gets passed to the CallExpression, which then unifies it with the function's parameter type, thereby
>+        resolving the 3 to be an int.
>+
>+        There are a few examples where multiple expressions will have the same type: "return (foo, 3)." If those
>+        types are regular types, then it's no problem; we can just clone() the type and stick both in the HashMap.
>+        However, if the type is a ResolvableType, an outer expression will only resolve that type once, so the two
>+        ResolvableTypes can't be distinct. The Checker solves this problem by making a reference-counted wrapper
>+        around ResolvableTypes and using that in the HashMap instead.
>+
>+        Once all the ResolvableTypes have been resolved, a second pass runs through the entire HashMap and assigns
>+        the known types to all the expressions. LValues and their associated address spaces are held in a parallel
>+        HashMap, and are assigned to the expression at the same time. The type is an Optional<AddressSpace> because
>+        address spaces are only relevant if the value is an lvalue; if it's nullopt then that means the expression
>+        is an rvalue.
>+
>+        No new tests because it isn't hooked up yet. Not enough of the compiler exists to have any meaningful sort
>+        of test. When enough of the compiler is present, I'll port the reference implementation's test suite.
>+
>+        * Modules/webgpu/WHLSL/WHLSLChecker.cpp: Added.
>+        (WebCore::WHLSL::resolveWithOperatorAnderIndexer):
>+        (WebCore::WHLSL::resolveWithOperatorLength):
>+        (WebCore::WHLSL::resolveWithReferenceComparator):
>+        (WebCore::WHLSL::resolveByInstantiation):
>+        (WebCore::WHLSL::checkSemantics):
>+        (WebCore::WHLSL::checkOperatorOverload):
>+        (WebCore::WHLSL::Checker::Checker):
>+        (WebCore::WHLSL::Checker::visit):
>+        (WebCore::WHLSL::Checker::assignTypes):
>+        (WebCore::WHLSL::Checker::checkShaderType):
>+        (WebCore::WHLSL::matchAndCommit):
>+        (WebCore::WHLSL::Checker::recurseAndGetInfo):
>+        (WebCore::WHLSL::Checker::getInfo):
>+        (WebCore::WHLSL::Checker::assignType):
>+        (WebCore::WHLSL::Checker::forwardType):
>+        (WebCore::WHLSL::getUnnamedType):
>+        (WebCore::WHLSL::Checker::finishVisitingPropertyAccess):
>+        (WebCore::WHLSL::Checker::recurseAndWrapBaseType):
>+        (WebCore::WHLSL::Checker::isBoolType):
>+        (WebCore::WHLSL::Checker::recurseAndRequireBoolType):
>+        (WebCore::WHLSL::check):
>+        * Modules/webgpu/WHLSL/WHLSLChecker.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.cpp: Added.
>+        (WebCore::WHLSL::Gatherer::Gatherer):
>+        (WebCore::WHLSL::Gatherer::reset):
>+        (WebCore::WHLSL::Gatherer::takeEntryPointItems):
>+        (WebCore::WHLSL::Gatherer::visit):
>+        (WebCore::WHLSL::gatherEntryPointItems):
>+        * Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.h: Added.
>+        (WebCore::WHLSL::EntryPointItem::EntryPointItem):
>+        * Sources.txt:
>+        * WebCore.xcodeproj/project.pbxproj:
>+
> 2019-01-13  Simon Fraser  <simon.fraser@apple.com>
> 
>         Minor optimization to RenderText::setRenderedText()
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLChecker.cpp b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLChecker.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..efd7c9d2da790b10b06ff1d0c8194ce3fc18d48d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLChecker.cpp
>@@ -0,0 +1,1452 @@
>+/*
>+ * Copyright (C) 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
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WHLSLChecker.h"
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLArrayReferenceType.h"
>+#include "WHLSLArrayType.h"
>+#include "WHLSLAssignmentExpression.h"
>+#include "WHLSLCallExpression.h"
>+#include "WHLSLCommaExpression.h"
>+#include "WHLSLDereferenceExpression.h"
>+#include "WHLSLDoWhileLoop.h"
>+#include "WHLSLDotExpression.h"
>+#include "WHLSLForLoop.h"
>+#include "WHLSLGatherEntryPointItems.h"
>+#include "WHLSLIfStatement.h"
>+#include "WHLSLIndexExpression.h"
>+#include "WHLSLInferTypes.h"
>+#include "WHLSLLogicalExpression.h"
>+#include "WHLSLLogicalNotExpression.h"
>+#include "WHLSLMakeArrayReferenceExpression.h"
>+#include "WHLSLMakePointerExpression.h"
>+#include "WHLSLPointerType.h"
>+#include "WHLSLProgram.h"
>+#include "WHLSLReadModifyWriteExpression.h"
>+#include "WHLSLResolvableType.h"
>+#include "WHLSLResolveOverloadImpl.h"
>+#include "WHLSLResolvingType.h"
>+#include "WHLSLReturn.h"
>+#include "WHLSLSwitchStatement.h"
>+#include "WHLSLTernaryExpression.h"
>+#include "WHLSLVisitor.h"
>+#include "WHLSLWhileLoop.h"
>+#include <wtf/HashMap.h>
>+#include <wtf/HashSet.h>
>+#include <wtf/Ref.h>
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+class PODChecker : public Visitor {
>+public:
>+    PODChecker() = default;
>+
>+    virtual ~PODChecker() = default;
>+
>+    void visit(AST::EnumerationDefinition& enumerationDefinition) override
>+    {
>+        Visitor::visit(enumerationDefinition);
>+    }
>+
>+    void visit(AST::NativeTypeDeclaration& nativeTypeDeclaration) override
>+    {
>+        if (!nativeTypeDeclaration.isNumber()
>+            && !nativeTypeDeclaration.isVector()
>+            && !nativeTypeDeclaration.isMatrix())
>+            setError();
>+    }
>+
>+    void visit(AST::StructureDefinition& structureDefinition) override
>+    {
>+        Visitor::visit(structureDefinition);
>+    }
>+
>+    void visit(AST::TypeDefinition& typeDefinition) override
>+    {
>+        Visitor::visit(typeDefinition);
>+    }
>+
>+    void visit(AST::ArrayType& arrayType) override
>+    {
>+        Visitor::visit(arrayType);
>+    }
>+
>+    void visit(AST::PointerType&) override
>+    {
>+        setError();
>+    }
>+
>+    void visit(AST::ArrayReferenceType&) override
>+    {
>+        setError();
>+    }
>+
>+    void visit(AST::TypeReference& typeReference) override
>+    {
>+        ASSERT(typeReference.resolvedType());
>+        checkErrorAndVisit(*typeReference.resolvedType());
>+    }
>+};
>+
>+static Optional<AST::NativeFunctionDeclaration> resolveWithOperatorAnderIndexer(AST::CallExpression& callExpression, AST::ArrayReferenceType& firstArgument, const Intrinsics& intrinsics)
>+{
>+    bool isRestricted = false;
>+    bool isOperator = true;
>+    auto returnType = makeUniqueRef<AST::PointerType>(Lexer::Token(callExpression.origin()), firstArgument.addressSpace(), firstArgument.elementType().clone());
>+    AST::VariableDeclarations parameters;
>+    parameters.append(AST::VariableDeclaration(Lexer::Token(callExpression.origin()), AST::Qualifiers(), { firstArgument.clone() }, String(), WTF::nullopt, WTF::nullopt));
>+    parameters.append(AST::VariableDeclaration(Lexer::Token(callExpression.origin()), AST::Qualifiers(), { AST::TypeReference::wrap(Lexer::Token(callExpression.origin()), intrinsics.uintType()) }, String(), WTF::nullopt, WTF::nullopt));
>+    return AST::NativeFunctionDeclaration(AST::FunctionDeclaration(Lexer::Token(callExpression.origin()), AST::AttributeBlock(), WTF::nullopt, WTFMove(returnType), String("operator&[]", String::ConstructFromLiteral), WTFMove(parameters), WTF::nullopt, isOperator), isRestricted);
>+}
>+
>+static Optional<AST::NativeFunctionDeclaration> resolveWithOperatorLength(AST::CallExpression& callExpression, AST::UnnamedType& firstArgument, const Intrinsics& intrinsics)
>+{
>+    bool isRestricted = false;
>+    bool isOperator = true;
>+    auto returnType = AST::TypeReference::wrap(Lexer::Token(callExpression.origin()), intrinsics.uintType());
>+    AST::VariableDeclarations parameters;
>+    parameters.append(AST::VariableDeclaration(Lexer::Token(callExpression.origin()), AST::Qualifiers(), { firstArgument.clone() }, String(), WTF::nullopt, WTF::nullopt));
>+    return AST::NativeFunctionDeclaration(AST::FunctionDeclaration(Lexer::Token(callExpression.origin()), AST::AttributeBlock(), WTF::nullopt, WTFMove(returnType), String("operator.length", String::ConstructFromLiteral), WTFMove(parameters), WTF::nullopt, isOperator), isRestricted);
>+}
>+
>+static Optional<AST::NativeFunctionDeclaration> resolveWithReferenceComparator(AST::CallExpression& callExpression, ResolvingType& firstArgument, ResolvingType& secondArgument, const Intrinsics& intrinsics)
>+{
>+    bool isRestricted = false;
>+    bool isOperator = true;
>+    auto returnType = AST::TypeReference::wrap(Lexer::Token(callExpression.origin()), intrinsics.boolType());
>+    auto argumentType = WTF::visit(WTF::makeVisitor([](UniqueRef<AST::UnnamedType>& unnamedType) -> UniqueRef<AST::UnnamedType> {
>+        return unnamedType->clone();
>+    }, [&](Ref<ResolvableTypeReference>&) -> UniqueRef<AST::UnnamedType> {
>+        return WTF::visit(WTF::makeVisitor([](UniqueRef<AST::UnnamedType>& unnamedType) -> UniqueRef<AST::UnnamedType> {
>+            return unnamedType->clone();
>+        }, [&](Ref<ResolvableTypeReference>&) -> UniqueRef<AST::UnnamedType> {
>+            // We encountered "null == null".
>+            // The type isn't observable, so we can pick whatever we want.
>+            // FIXME: This can probably be generalized, using the "preferred type" infrastructure used by generic literals
>+            return AST::TypeReference::wrap(Lexer::Token(callExpression.origin()), intrinsics.intType());
>+        }), secondArgument);
>+    }), firstArgument);
>+    AST::VariableDeclarations parameters;
>+    parameters.append(AST::VariableDeclaration(Lexer::Token(callExpression.origin()), AST::Qualifiers(), { argumentType->clone() }, String(), WTF::nullopt, WTF::nullopt));
>+    parameters.append(AST::VariableDeclaration(Lexer::Token(callExpression.origin()), AST::Qualifiers(), { WTFMove(argumentType) }, String(), WTF::nullopt, WTF::nullopt));
>+    return AST::NativeFunctionDeclaration(AST::FunctionDeclaration(Lexer::Token(callExpression.origin()), AST::AttributeBlock(), WTF::nullopt, WTFMove(returnType), String("operator==", String::ConstructFromLiteral), WTFMove(parameters), WTF::nullopt, isOperator), isRestricted);
>+}
>+
>+static Optional<AST::NativeFunctionDeclaration> resolveByInstantiation(AST::CallExpression& callExpression, const Vector<std::reference_wrapper<ResolvingType>>& types, const Intrinsics& intrinsics)
>+{
>+    if (callExpression.name() == "operator&[]" && types.size() == 2) {
>+        auto* firstArgumentArrayRef = WTF::visit(WTF::makeVisitor([](UniqueRef<AST::UnnamedType>& unnamedType) -> AST::ArrayReferenceType* {
>+            if (is<AST::ArrayReferenceType>(static_cast<AST::UnnamedType&>(unnamedType)))
>+                return &downcast<AST::ArrayReferenceType>(static_cast<AST::UnnamedType&>(unnamedType));
>+            return nullptr;
>+        }, [](Ref<ResolvableTypeReference>&) -> AST::ArrayReferenceType* {
>+            return nullptr;
>+        }), types[0].get());
>+        bool secondArgumentIsUint = WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& unnamedType) -> bool {
>+            return matches(unnamedType, intrinsics.uintType());
>+        }, [&](Ref<ResolvableTypeReference>& resolvableTypeReference) -> bool {
>+            return resolvableTypeReference->resolvableType().canResolve(intrinsics.uintType());
>+        }), types[1].get());
>+        if (firstArgumentArrayRef && secondArgumentIsUint)
>+            return resolveWithOperatorAnderIndexer(callExpression, *firstArgumentArrayRef, intrinsics);
>+    } else if (callExpression.name() == "operator.length" && types.size() == 1) {
>+        auto* firstArgumentReference = WTF::visit(WTF::makeVisitor([](UniqueRef<AST::UnnamedType>& unnamedType) -> AST::UnnamedType* {
>+            if (is<AST::ArrayReferenceType>(static_cast<AST::UnnamedType&>(unnamedType)) || is<AST::ArrayType>(static_cast<AST::UnnamedType&>(unnamedType)))
>+                return &unnamedType;
>+            return nullptr;
>+        }, [](Ref<ResolvableTypeReference>&) -> AST::UnnamedType* {
>+            return nullptr;
>+        }), types[0].get());
>+        if (firstArgumentReference)
>+            return resolveWithOperatorLength(callExpression, *firstArgumentReference, intrinsics);
>+    } else if (callExpression.name() == "operator==" && types.size() == 2) {
>+        auto isAcceptable = [](ResolvingType& resolvingType) -> bool {
>+            return WTF::visit(WTF::makeVisitor([](UniqueRef<AST::UnnamedType>& unnamedType) -> bool {
>+                return is<AST::ReferenceType>(static_cast<AST::UnnamedType&>(unnamedType));
>+            }, [](Ref<ResolvableTypeReference>& resolvableTypeReference) -> bool {
>+                return is<AST::NullLiteralType>(resolvableTypeReference->resolvableType());
>+            }), resolvingType);
>+        };
>+        if (isAcceptable(types[0].get()) && isAcceptable(types[1].get()))
>+            return resolveWithReferenceComparator(callExpression, types[0].get(), types[1].get(), intrinsics);
>+    }
>+    return WTF::nullopt;
>+}
>+
>+static bool checkSemantics(Vector<EntryPointItem>& inputItems, Vector<EntryPointItem>& outputItems, const Optional<AST::EntryPointType>& entryPointType, const Intrinsics& intrinsics)
>+{
>+    {
>+        auto checkDuplicateSemantics = [&](const Vector<EntryPointItem>& items) -> bool {
>+            for (size_t i = 0; i < items.size(); ++i) {
>+                for (size_t j = i + 1; j < items.size(); ++j) {
>+                    if (items[i].semantic == items[j].semantic)
>+                        return false;
>+                }
>+            }
>+            return true;
>+        };
>+        if (!checkDuplicateSemantics(inputItems))
>+            return false;
>+        if (!checkDuplicateSemantics(outputItems))
>+            return false;
>+    }
>+
>+    {
>+        auto checkSemanticTypes = [&](const Vector<EntryPointItem>& items) -> bool {
>+            for (auto& item : items) {
>+                auto acceptable = WTF::visit(WTF::makeVisitor([&](const AST::BaseSemantic& semantic) -> bool {
>+                    return semantic.isAcceptableType(item.unnamedType, intrinsics);
>+                }), item.semantic);
>+                if (!acceptable)
>+                    return false;
>+            }
>+            return true;
>+        };
>+        if (!checkSemanticTypes(inputItems))
>+            return false;
>+        if (!checkSemanticTypes(outputItems))
>+            return false;
>+    }
>+
>+    {
>+        auto checkSemanticForShaderType = [&](const Vector<EntryPointItem>& items, AST::BaseSemantic::ShaderItemDirection direction) -> bool {
>+            for (auto& item : items) {
>+                auto acceptable = WTF::visit(WTF::makeVisitor([&](const AST::BaseSemantic& semantic) -> bool {
>+                    return semantic.isAcceptableForShaderItemDirection(direction, entryPointType);
>+                }), item.semantic);
>+                if (!acceptable)
>+                    return false;
>+            }
>+            return true;
>+        };
>+        if (!checkSemanticForShaderType(inputItems, AST::BaseSemantic::ShaderItemDirection::Input))
>+            return false;
>+        if (!checkSemanticForShaderType(outputItems, AST::BaseSemantic::ShaderItemDirection::Output))
>+            return false;
>+    }
>+
>+    {
>+        auto checkPODData = [&](const Vector<EntryPointItem>& items) -> bool {
>+            for (auto& item : items) {
>+                PODChecker podChecker;
>+                if (is<AST::PointerType>(item.unnamedType))
>+                    podChecker.checkErrorAndVisit(downcast<AST::PointerType>(item.unnamedType).elementType());
>+                else if (is<AST::ArrayReferenceType>(item.unnamedType))
>+                    podChecker.checkErrorAndVisit(downcast<AST::ArrayReferenceType>(item.unnamedType).elementType());
>+                else if (is<AST::ArrayType>(item.unnamedType))
>+                    podChecker.checkErrorAndVisit(downcast<AST::ArrayType>(item.unnamedType).type());
>+                else
>+                    continue;
>+                if (podChecker.error())
>+                    return false;
>+            }
>+            return true;
>+        };
>+        if (!checkPODData(inputItems))
>+            return false;
>+        if (!checkPODData(outputItems))
>+            return false;
>+    }
>+
>+    return true;
>+}
>+
>+static bool checkOperatorOverload(const AST::FunctionDefinition& functionDefinition, const Intrinsics& intrinsics, NameContext& nameContext)
>+{
>+    enum class CheckKind {
>+        Index,
>+        Dot
>+    };
>+
>+    auto checkGetter = [&](CheckKind kind) -> bool {
>+        size_t numExpectedParameters = kind == CheckKind::Index ? 2 : 1;
>+        if (functionDefinition.parameters().size() != numExpectedParameters)
>+            return false;
>+        auto& unifyNode = (*functionDefinition.parameters()[0].type())->unifyNode();
>+        if (is<AST::UnnamedType>(unifyNode)) {
>+            auto& unnamedType = downcast<AST::UnnamedType>(unifyNode);
>+            if (is<AST::PointerType>(unnamedType))
>+                return false;
>+        }
>+        return true;
>+    };
>+
>+    auto checkSetter = [&](CheckKind kind) -> bool {
>+        size_t numExpectedParameters = kind == CheckKind::Index ? 3 : 2;
>+        if (functionDefinition.parameters().size() != numExpectedParameters)
>+            return false;
>+        auto& firstArgumentUnifyNode = (*functionDefinition.parameters()[0].type())->unifyNode();
>+        if (is<AST::UnnamedType>(firstArgumentUnifyNode)) {
>+            auto& unnamedType = downcast<AST::UnnamedType>(firstArgumentUnifyNode);
>+            if (is<AST::PointerType>(unnamedType))
>+                return false;
>+        }
>+        if (!matches(functionDefinition.type(), *functionDefinition.parameters()[0].type()))
>+            return false;
>+        auto& valueType = *functionDefinition.parameters()[numExpectedParameters - 1].type();
>+        auto getterName = functionDefinition.name().substring(0, functionDefinition.name().length() - 1);
>+        auto* getterFuncs = nameContext.getFunctions(getterName);
>+        if (!getterFuncs)
>+            return false;
>+        Vector<ResolvingType> argumentTypes;
>+        Vector<std::reference_wrapper<ResolvingType>> argumentTypeReferences;
>+        for (size_t i = 0; i < numExpectedParameters - 1; ++i)
>+            argumentTypes.append((*functionDefinition.parameters()[0].type())->clone());
>+        for (auto& argumentType : argumentTypes)
>+            argumentTypeReferences.append(argumentType);
>+        Optional<std::reference_wrapper<AST::NamedType>> castReturnType;
>+        auto* overload = resolveFunctionOverloadImpl(*getterFuncs, argumentTypeReferences, castReturnType);
>+        if (!overload)
>+            return false;
>+        auto& resultType = overload->type();
>+        return matches(resultType, valueType);
>+    };
>+
>+    auto checkAnder = [&](CheckKind kind) -> bool {
>+        size_t numExpectedParameters = kind == CheckKind::Index ? 2 : 1;
>+        if (functionDefinition.parameters().size() != numExpectedParameters)
>+            return false;
>+        {
>+            auto& unifyNode = functionDefinition.type().unifyNode();
>+            if (!is<AST::UnnamedType>(unifyNode))
>+                return false;
>+            auto& unnamedType = downcast<AST::UnnamedType>(unifyNode);
>+            if (!is<AST::PointerType>(unnamedType))
>+                return false;
>+        }
>+        {
>+            auto& unifyNode = (*functionDefinition.parameters()[0].type())->unifyNode();
>+            if (!is<AST::UnnamedType>(unifyNode))
>+                return false;
>+            auto& unnamedType = downcast<AST::UnnamedType>(unifyNode);
>+            return is<AST::PointerType>(unnamedType) || is<AST::ArrayReferenceType>(unnamedType);
>+        }
>+    };
>+
>+    if (!functionDefinition.isOperator())
>+        return true;
>+    if (functionDefinition.isCast())
>+        return true;
>+    if (functionDefinition.name() == "operator++" || functionDefinition.name() == "operator--") {
>+        return functionDefinition.parameters().size() == 1
>+            && matches(*functionDefinition.parameters()[0].type(), functionDefinition.type());
>+    }
>+    if (functionDefinition.name() == "operator+" || functionDefinition.name() == "operator-")
>+        return functionDefinition.parameters().size() == 1 || functionDefinition.parameters().size() == 2;
>+    if (functionDefinition.name() == "operator*"
>+        || functionDefinition.name() == "operator/"
>+        || functionDefinition.name() == "operator%"
>+        || functionDefinition.name() == "operator&"
>+        || functionDefinition.name() == "operator|"
>+        || functionDefinition.name() == "operator^"
>+        || functionDefinition.name() == "operator<<"
>+        || functionDefinition.name() == "opreator>>")
>+        return functionDefinition.parameters().size() == 2;
>+    if (functionDefinition.name() == "operator~")
>+        return functionDefinition.parameters().size() == 1;
>+    if (functionDefinition.name() == "operator=="
>+        || functionDefinition.name() == "operator<"
>+        || functionDefinition.name() == "operator<="
>+        || functionDefinition.name() == "operator>"
>+        || functionDefinition.name() == "operator>=") {
>+        return functionDefinition.parameters().size() == 2
>+            && matches(functionDefinition.type(), intrinsics.boolType());
>+    }
>+    if (functionDefinition.name() == "operator[]")
>+        return checkGetter(CheckKind::Index);
>+    if (functionDefinition.name() == "operator[]=")
>+        return checkSetter(CheckKind::Index);
>+    if (functionDefinition.name() == "operator&[]")
>+        return checkAnder(CheckKind::Index);
>+    if (functionDefinition.name().startsWith("operator.")) {
>+        if (functionDefinition.name().endsWith("="))
>+            return checkSetter(CheckKind::Dot);
>+        return checkGetter(CheckKind::Dot);
>+    }
>+    if (functionDefinition.name().startsWith("operator&."))
>+        return checkAnder(CheckKind::Dot);
>+    return false;
>+}
>+
>+class Checker : public Visitor {
>+public:
>+    Checker(const Intrinsics& intrinsics, Program& program)
>+        : m_intrinsics(intrinsics)
>+        , m_program(program)
>+    {
>+    }
>+
>+    ~Checker() = default;
>+
>+    void visit(Program&) override;
>+
>+    bool assignTypes();
>+
>+private:
>+    bool checkShaderType(const AST::FunctionDefinition&);
>+    void finishVisitingPropertyAccess(AST::PropertyAccessExpression&, AST::UnnamedType& wrappedBaseType, AST::UnnamedType* extraArgumentType = nullptr);
>+    bool isBoolType(ResolvingType&);
>+    struct RecurseInfo {
>+        ResolvingType& resolvingType;
>+        Optional<AST::AddressSpace>& addressSpace;
>+    };
>+    Optional<RecurseInfo> recurseAndGetInfo(AST::Expression&, bool requiresLValue = false);
>+    Optional<RecurseInfo> getInfo(AST::Expression&, bool requiresLValue = false);
>+    Optional<UniqueRef<AST::UnnamedType>> recurseAndWrapBaseType(AST::PropertyAccessExpression&);
>+    bool recurseAndRequireBoolType(AST::Expression&);
>+    void assignType(AST::Expression&, UniqueRef<AST::UnnamedType>&&, Optional<AST::AddressSpace> = WTF::nullopt);
>+    void assignType(AST::Expression&, Ref<ResolvableTypeReference>&&, Optional<AST::AddressSpace> = WTF::nullopt);
>+    void forwardType(AST::Expression&, ResolvingType&, Optional<AST::AddressSpace> = WTF::nullopt);
>+
>+    void visit(AST::FunctionDefinition&) override;
>+    void visit(AST::EnumerationDefinition&) override;
>+    void visit(AST::TypeReference&) override;
>+    void visit(AST::VariableDeclaration&) override;
>+    void visit(AST::AssignmentExpression&) override;
>+    void visit(AST::ReadModifyWriteExpression&) override;
>+    void visit(AST::DereferenceExpression&) override;
>+    void visit(AST::MakePointerExpression&) override;
>+    void visit(AST::MakeArrayReferenceExpression&) override;
>+    void visit(AST::DotExpression&) override;
>+    void visit(AST::IndexExpression&) override;
>+    void visit(AST::VariableReference&) override;
>+    void visit(AST::Return&) override;
>+    void visit(AST::PointerType&) override;
>+    void visit(AST::ArrayReferenceType&) override;
>+    void visit(AST::IntegerLiteral&) override;
>+    void visit(AST::UnsignedIntegerLiteral&) override;
>+    void visit(AST::FloatLiteral&) override;
>+    void visit(AST::NullLiteral&) override;
>+    void visit(AST::BooleanLiteral&) override;
>+    void visit(AST::EnumerationMemberLiteral&) override;
>+    void visit(AST::LogicalNotExpression&) override;
>+    void visit(AST::LogicalExpression&) override;
>+    void visit(AST::IfStatement&) override;
>+    void visit(AST::WhileLoop&) override;
>+    void visit(AST::DoWhileLoop&) override;
>+    void visit(AST::ForLoop&) override;
>+    void visit(AST::SwitchStatement&) override;
>+    void visit(AST::CommaExpression&) override;
>+    void visit(AST::TernaryExpression&) override;
>+    void visit(AST::CallExpression&) override;
>+
>+    HashMap<AST::Expression*, ResolvingType> m_typeMap;
>+    HashMap<AST::Expression*, Optional<AST::AddressSpace>> m_addressSpaceMap;
>+    HashSet<String> m_vertexEntryPoints;
>+    HashSet<String> m_fragmentEntryPoints;
>+    HashSet<String> m_computeEntryPoints;
>+    const Intrinsics& m_intrinsics;
>+    Program& m_program;
>+};
>+
>+void Checker::visit(Program& program)
>+{
>+    // These visiting functions might add new global statements, so don't use foreach syntax.
>+    for (size_t i = 0; i < program.typeDefinitions().size(); ++i)
>+        checkErrorAndVisit(program.typeDefinitions()[i]);
>+    for (size_t i = 0; i < program.structureDefinitions().size(); ++i)
>+        checkErrorAndVisit(program.structureDefinitions()[i]);
>+    for (size_t i = 0; i < program.enumerationDefinitions().size(); ++i)
>+        checkErrorAndVisit(program.enumerationDefinitions()[i]);
>+    for (size_t i = 0; i < program.nativeTypeDeclarations().size(); ++i)
>+        checkErrorAndVisit(program.nativeTypeDeclarations()[i]);
>+
>+    for (size_t i = 0; i < program.functionDefinitions().size(); ++i)
>+        checkErrorAndVisit(program.functionDefinitions()[i]);
>+    for (size_t i = 0; i < program.nativeFunctionDeclarations().size(); ++i)
>+        checkErrorAndVisit(program.nativeFunctionDeclarations()[i]);
>+}
>+
>+bool Checker::assignTypes()
>+{
>+    for (auto& keyValuePair : m_typeMap) {
>+        auto success = WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& unnamedType) -> bool {
>+            keyValuePair.key->setType(unnamedType->clone());
>+            return true;
>+        }, [&](Ref<ResolvableTypeReference>& resolvableTypeReference) -> bool {
>+            if (!resolvableTypeReference->resolvableType().resolvedType()) {
>+                // FIXME: Instead of trying to commit, it might be better to just return an error instead.
>+                if (!static_cast<bool>(commit(resolvableTypeReference->resolvableType())))
>+                    return false;
>+            }
>+            keyValuePair.key->setType(resolvableTypeReference->resolvableType().resolvedType()->clone());
>+            return true;
>+        }), keyValuePair.value);
>+        if (!success)
>+            return false;
>+    }
>+
>+    for (auto& keyValuePair : m_addressSpaceMap)
>+        keyValuePair.key->setAddressSpace(keyValuePair.value);
>+    return true;
>+}
>+
>+bool Checker::checkShaderType(const AST::FunctionDefinition& functionDefinition)
>+{
>+    switch (*functionDefinition.entryPointType()) {
>+    case AST::EntryPointType::Vertex:
>+        return !m_vertexEntryPoints.add(functionDefinition.name()).isNewEntry;
>+    case AST::EntryPointType::Fragment:
>+        return !m_fragmentEntryPoints.add(functionDefinition.name()).isNewEntry;
>+    case AST::EntryPointType::Compute:
>+        return !m_computeEntryPoints.add(functionDefinition.name()).isNewEntry;
>+    }
>+}
>+
>+void Checker::visit(AST::FunctionDefinition& functionDefinition)
>+{
>+    if (functionDefinition.entryPointType()) {
>+        if (!checkShaderType(functionDefinition)) {
>+            setError();
>+            return;
>+        }
>+        auto entryPointItems = gatherEntryPointItems(m_intrinsics, functionDefinition);
>+        if (!entryPointItems) {
>+            setError();
>+            return;
>+        }
>+        if (!checkSemantics(entryPointItems->inputs, entryPointItems->outputs, functionDefinition.entryPointType(), m_intrinsics)) {
>+            setError();
>+            return;
>+        }
>+    }
>+    if (!checkOperatorOverload(functionDefinition, m_intrinsics, m_program.nameContext())) {
>+        setError();
>+        return;
>+    }
>+
>+    checkErrorAndVisit(functionDefinition);
>+}
>+
>+static Optional<UniqueRef<AST::UnnamedType>> matchAndCommit(ResolvingType& left, ResolvingType& right)
>+{
>+    return WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& left) -> Optional<UniqueRef<AST::UnnamedType>> {
>+        return WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& right) -> Optional<UniqueRef<AST::UnnamedType>> {
>+            if (matches(left, right))
>+                return left->clone();
>+            return WTF::nullopt;
>+        }, [&](Ref<ResolvableTypeReference>& right) -> Optional<UniqueRef<AST::UnnamedType>> {
>+            return matchAndCommit(left, right->resolvableType());
>+        }), right);
>+    }, [&](Ref<ResolvableTypeReference>& left) -> Optional<UniqueRef<AST::UnnamedType>> {
>+        return WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& right) -> Optional<UniqueRef<AST::UnnamedType>> {
>+            return matchAndCommit(right, left->resolvableType());
>+        }, [&](Ref<ResolvableTypeReference>& right) -> Optional<UniqueRef<AST::UnnamedType>> {
>+            return matchAndCommit(left->resolvableType(), right->resolvableType());
>+        }), right);
>+    }), left);
>+}
>+
>+static Optional<UniqueRef<AST::UnnamedType>> matchAndCommit(ResolvingType& resolvingType, AST::UnnamedType& unnamedType)
>+{
>+    return WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& resolvingType) -> Optional<UniqueRef<AST::UnnamedType>> {
>+        if (matches(unnamedType, resolvingType))
>+            return unnamedType.clone();
>+        return WTF::nullopt;
>+    }, [&](Ref<ResolvableTypeReference>& resolvingType) -> Optional<UniqueRef<AST::UnnamedType>> {
>+        return matchAndCommit(unnamedType, resolvingType->resolvableType());
>+    }), resolvingType);
>+}
>+
>+static Optional<UniqueRef<AST::UnnamedType>> matchAndCommit(ResolvingType& resolvingType, AST::NamedType& namedType)
>+{
>+    return WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& resolvingType) -> Optional<UniqueRef<AST::UnnamedType>> {
>+        if (matches(resolvingType, namedType))
>+            return resolvingType->clone();
>+        return WTF::nullopt;
>+    }, [&](Ref<ResolvableTypeReference>& resolvingType) -> Optional<UniqueRef<AST::UnnamedType>> {
>+        return matchAndCommit(namedType, resolvingType->resolvableType());
>+    }), resolvingType);
>+}
>+
>+void Checker::visit(AST::EnumerationDefinition& enumerationDefinition)
>+{
>+    auto* baseType = ([&]() -> AST::NativeTypeDeclaration* {
>+        checkErrorAndVisit(enumerationDefinition.type());
>+        auto& baseType = enumerationDefinition.type().unifyNode();
>+        if (!is<AST::UnnamedType>(baseType))
>+            return nullptr;
>+        auto& unnamedBase = downcast<AST::UnnamedType>(baseType);
>+        if (!is<AST::TypeReference>(unnamedBase))
>+            return nullptr;
>+        auto& typeReferenceBase = downcast<AST::TypeReference>(unnamedBase);
>+        ASSERT(typeReferenceBase.resolvedType());
>+        if (!is<AST::NativeTypeDeclaration>(*typeReferenceBase.resolvedType()))
>+            return nullptr;
>+        auto& nativeTypeDeclaration = downcast<AST::NativeTypeDeclaration>(*typeReferenceBase.resolvedType());
>+        if (!nativeTypeDeclaration.isInt())
>+            return nullptr;
>+        return &nativeTypeDeclaration;
>+    })();
>+    if (!baseType) {
>+        setError();
>+        return;
>+    }
>+
>+    auto enumerationMembers = enumerationDefinition.enumerationMembers();
>+
>+    for (auto& member : enumerationMembers) {
>+        if (!member.get().value())
>+            continue;
>+
>+        bool success = false;
>+        member.get().value()->visit(WTF::makeVisitor([&](AST::Expression& value) {
>+            auto valueInfo = recurseAndGetInfo(value);
>+            if (!valueInfo)
>+                return;
>+            success = static_cast<bool>(matchAndCommit(valueInfo->resolvingType, *baseType));
>+        }));
>+        if (!success) {
>+            setError();
>+            return;
>+        }
>+    }
>+
>+    int64_t nextValue = 0;
>+    for (auto& member : enumerationMembers) {
>+        if (member.get().value()) {
>+            int64_t value;
>+            member.get().value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& integerLiteral) {
>+                value = integerLiteral.valueForSelectedType();
>+            }, [&](AST::UnsignedIntegerLiteral& unsignedIntegerLiteral) {
>+                value = unsignedIntegerLiteral.valueForSelectedType();
>+            }, [&](auto&) {
>+                ASSERT_NOT_REACHED();
>+            }));
>+            nextValue = baseType->successor()(value);
>+        } else {
>+            member.get().setValue(AST::ConstantExpression(AST::IntegerLiteral(Lexer::Token(member.get().origin()), nextValue)));
>+            nextValue = baseType->successor()(nextValue);
>+        }
>+    }
>+
>+    auto getValue = [&](AST::EnumerationMember& member) -> int64_t {
>+        int64_t value;
>+        ASSERT(member.value());
>+        member.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& integerLiteral) {
>+            value = integerLiteral.value();
>+        }, [&](AST::UnsignedIntegerLiteral& unsignedIntegerLiteral) {
>+            value = unsignedIntegerLiteral.value();
>+        }, [&](auto&) {
>+            ASSERT_NOT_REACHED();
>+        }));
>+        return value;
>+    };
>+
>+    for (size_t i = 0; i < enumerationMembers.size(); ++i) {
>+        auto value = getValue(enumerationMembers[i].get());
>+        for (size_t j = i + 1; j < enumerationMembers.size(); ++j) {
>+            auto otherValue = getValue(enumerationMembers[j].get());
>+            if (value == otherValue) {
>+                setError();
>+                return;
>+            }
>+        }
>+    }
>+
>+    bool foundZero = false;
>+    for (auto& member : enumerationMembers) {
>+        if (!getValue(member.get())) {
>+            foundZero = true;
>+            break;
>+        }
>+    }
>+    if (!foundZero) {
>+        setError();
>+        return;
>+    }
>+}
>+
>+void Checker::visit(AST::TypeReference& typeReference)
>+{
>+    ASSERT(typeReference.resolvedType());
>+
>+    checkErrorAndVisit(typeReference);
>+}
>+
>+auto Checker::recurseAndGetInfo(AST::Expression& expression, bool requiresLValue) -> Optional<RecurseInfo>
>+{
>+    checkErrorAndVisit(expression);
>+    if (!error())
>+        return WTF::nullopt;
>+    return getInfo(expression, requiresLValue);
>+}
>+
>+auto Checker::getInfo(AST::Expression& expression, bool requiresLValue) -> Optional<RecurseInfo>
>+{
>+    auto typeIterator = m_typeMap.find(&expression);
>+    ASSERT(typeIterator != m_typeMap.end());
>+
>+    auto addressSpaceIterator = m_addressSpaceMap.find(&expression);
>+    ASSERT(addressSpaceIterator != m_addressSpaceMap.end());
>+    if (requiresLValue && !addressSpaceIterator->value) {
>+        setError();
>+        return WTF::nullopt;
>+    }
>+    return {{ typeIterator->value, addressSpaceIterator->value }};
>+}
>+
>+void Checker::visit(AST::VariableDeclaration& variableDeclaration)
>+{
>+    // ReadModifyWriteExpressions are the only place where anonymous variables exist,
>+    // and that doesn't recurse on the anonymous variables, so we can assume the variable has a type.
>+    checkErrorAndVisit(*variableDeclaration.type());
>+    if (variableDeclaration.initializer()) {
>+        auto& lhsType = *variableDeclaration.type();
>+        auto initializerInfo = recurseAndGetInfo(*variableDeclaration.initializer());
>+        if (!initializerInfo)
>+            return;
>+        if (!matchAndCommit(initializerInfo->resolvingType, lhsType)) {
>+            setError();
>+            return;
>+        }
>+    }
>+}
>+
>+void Checker::assignType(AST::Expression& expression, UniqueRef<AST::UnnamedType>&& unnamedType, Optional<AST::AddressSpace> addressSpace)
>+{
>+    auto addResult = m_typeMap.add(&expression, WTFMove(unnamedType));
>+    ASSERT_UNUSED(addResult, addResult.isNewEntry);
>+    auto addressSpaceAddResult = m_addressSpaceMap.add(&expression, addressSpace);
>+    ASSERT_UNUSED(addressSpaceAddResult, addressSpaceAddResult.isNewEntry);
>+}
>+
>+void Checker::assignType(AST::Expression& expression, Ref<ResolvableTypeReference>&& resolvableTypeReference, Optional<AST::AddressSpace> addressSpace)
>+{
>+    auto addResult = m_typeMap.add(&expression, WTFMove(resolvableTypeReference));
>+    ASSERT_UNUSED(addResult, addResult.isNewEntry);
>+    auto addressSpaceAddResult = m_addressSpaceMap.add(&expression, addressSpace);
>+    ASSERT_UNUSED(addressSpaceAddResult, addressSpaceAddResult.isNewEntry);
>+}
>+
>+void Checker::visit(AST::AssignmentExpression& assignmentExpression)
>+{
>+    auto leftInfo = recurseAndGetInfo(assignmentExpression.left(), true);
>+    if (!leftInfo)
>+        return;
>+
>+    auto rightInfo = recurseAndGetInfo(assignmentExpression.right());
>+    if (!rightInfo)
>+        return;
>+
>+    auto resultType = matchAndCommit(leftInfo->resolvingType, rightInfo->resolvingType);
>+    if (!resultType) {
>+        setError();
>+        return;
>+    }
>+
>+    assignType(assignmentExpression, WTFMove(*resultType));
>+}
>+
>+void Checker::forwardType(AST::Expression& expression, ResolvingType& resolvingType, Optional<AST::AddressSpace> addressSpace)
>+{
>+    WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& result) {
>+        auto addResult = m_typeMap.add(&expression, result->clone());
>+        ASSERT_UNUSED(addResult, addResult.isNewEntry);
>+    }, [&](Ref<ResolvableTypeReference>& result) {
>+        auto addResult = m_typeMap.add(&expression, result.copyRef());
>+        ASSERT_UNUSED(addResult, addResult.isNewEntry);
>+    }), resolvingType);
>+    auto addressSpaceAddResult = m_addressSpaceMap.add(&expression, addressSpace);
>+    ASSERT_UNUSED(addressSpaceAddResult, addressSpaceAddResult.isNewEntry);
>+}
>+
>+void Checker::visit(AST::ReadModifyWriteExpression& readModifyWriteExpression)
>+{
>+    auto lValueInfo = recurseAndGetInfo(readModifyWriteExpression.lValue(), true);
>+    if (!lValueInfo)
>+        return;
>+
>+    // FIXME: Figure out what to do with the ReadModifyWriteExpression's AnonymousVariables.
>+
>+    auto newValueInfo = recurseAndGetInfo(*readModifyWriteExpression.newValueExpression());
>+    if (!newValueInfo)
>+        return;
>+
>+    if (!matchAndCommit(lValueInfo->resolvingType, newValueInfo->resolvingType)) {
>+        setError();
>+        return;
>+    }
>+
>+    auto resultInfo = recurseAndGetInfo(*readModifyWriteExpression.resultExpression());
>+    if (!resultInfo)
>+        return;
>+
>+    forwardType(readModifyWriteExpression, resultInfo->resolvingType);
>+}
>+
>+static AST::UnnamedType* getUnnamedType(ResolvingType& resolvingType)
>+{
>+    return WTF::visit(WTF::makeVisitor([](UniqueRef<AST::UnnamedType>& type) -> AST::UnnamedType* {
>+        return &type;
>+    }, [](Ref<ResolvableTypeReference>& type) -> AST::UnnamedType* {
>+        // FIXME: If the type isn't committed, should we just commit() it now?
>+        return type->resolvableType().resolvedType();
>+    }), resolvingType);
>+}
>+
>+void Checker::visit(AST::DereferenceExpression& dereferenceExpression)
>+{
>+    auto pointerInfo = recurseAndGetInfo(dereferenceExpression.pointer());
>+    if (!pointerInfo)
>+        return;
>+
>+    auto* unnamedType = getUnnamedType(pointerInfo->resolvingType);
>+
>+    auto* pointerType = ([&](AST::UnnamedType* unnamedType) -> AST::PointerType* {
>+        if (!unnamedType)
>+            return nullptr;
>+        auto& unifyNode = unnamedType->unifyNode();
>+        if (!is<AST::UnnamedType>(unifyNode))
>+            return nullptr;
>+        auto& unnamedUnifyType = downcast<AST::UnnamedType>(unifyNode);
>+        if (!is<AST::PointerType>(unnamedUnifyType))
>+            return nullptr;
>+        return &downcast<AST::PointerType>(unnamedUnifyType);
>+    })(unnamedType);
>+    if (!pointerType) {
>+        setError();
>+        return;
>+    }
>+
>+    assignType(dereferenceExpression, pointerType->clone(), pointerType->addressSpace());
>+}
>+
>+void Checker::visit(AST::MakePointerExpression& makePointerExpression)
>+{
>+    auto lValueInfo = recurseAndGetInfo(makePointerExpression.lValue(), true);
>+    if (!lValueInfo)
>+        return;
>+
>+    auto* lValueType = getUnnamedType(lValueInfo->resolvingType);
>+    if (!lValueType) {
>+        setError();
>+        return;
>+    }
>+
>+    assignType(makePointerExpression, makeUniqueRef<AST::PointerType>(Lexer::Token(makePointerExpression.origin()), *lValueInfo->addressSpace, lValueType->clone()));
>+}
>+
>+void Checker::visit(AST::MakeArrayReferenceExpression& makeArrayReferenceExpression)
>+{
>+    auto lValueInfo = recurseAndGetInfo(makeArrayReferenceExpression.lValue());
>+    if (!lValueInfo)
>+        return;
>+
>+    auto* lValueType = getUnnamedType(lValueInfo->resolvingType);
>+    if (!lValueType) {
>+        setError();
>+        return;
>+    }
>+
>+    auto& unifyNode = lValueType->unifyNode();
>+    if (is<AST::UnnamedType>(unifyNode)) {
>+        auto& unnamedType = downcast<AST::UnnamedType>(unifyNode);
>+        if (is<AST::PointerType>(unnamedType)) {
>+            auto& pointerType = downcast<AST::PointerType>(unnamedType);
>+            // FIXME: Save the fact that we're not targetting the item; we're targetting the item's inner element.
>+            assignType(makeArrayReferenceExpression, makeUniqueRef<AST::ArrayReferenceType>(Lexer::Token(makeArrayReferenceExpression.origin()), pointerType.addressSpace(), pointerType.elementType().clone()));
>+            return;
>+        }
>+
>+        if (!lValueInfo->addressSpace) {
>+            setError();
>+            return;
>+        }
>+
>+        if (is<AST::ArrayType>(unnamedType)) {
>+            auto& arrayType = downcast<AST::ArrayType>(unnamedType);
>+            // FIXME: Save the number of elements.
>+            assignType(makeArrayReferenceExpression, makeUniqueRef<AST::ArrayReferenceType>(Lexer::Token(makeArrayReferenceExpression.origin()), *lValueInfo->addressSpace, arrayType.type().clone()));
>+            return;
>+        }
>+    }
>+
>+    if (!lValueInfo->addressSpace) {
>+        setError();
>+        return;
>+    }
>+
>+    assignType(makeArrayReferenceExpression, makeUniqueRef<AST::ArrayReferenceType>(Lexer::Token(makeArrayReferenceExpression.origin()), *lValueInfo->addressSpace, lValueType->clone()));
>+}
>+
>+void Checker::finishVisitingPropertyAccess(AST::PropertyAccessExpression& propertyAccessExpression, AST::UnnamedType& wrappedBaseType, AST::UnnamedType* extraArgumentType)
>+{
>+    Optional<std::reference_wrapper<AST::NamedType>> castReturnType;
>+    using OverloadResolution = std::tuple<AST::FunctionDeclaration*, AST::UnnamedType*>;
>+
>+    AST::FunctionDeclaration* getFunction;
>+    AST::UnnamedType* getReturnType;
>+    std::tie(getFunction, getReturnType) = ([&]() -> OverloadResolution {
>+        ResolvingType getArgumentType1(wrappedBaseType.clone());
>+        Optional<ResolvingType> getArgumentType2;
>+        if (extraArgumentType)
>+            getArgumentType2 = ResolvingType(extraArgumentType->clone());
>+
>+        Vector<std::reference_wrapper<ResolvingType>> getArgumentTypes;
>+        getArgumentTypes.append(getArgumentType1);
>+        if (getArgumentType2)
>+            getArgumentTypes.append(*getArgumentType2);
>+
>+        auto* getFunction = resolveFunctionOverloadImpl(propertyAccessExpression.possibleGetOverloads(), getArgumentTypes, castReturnType);
>+        if (!getFunction)
>+            return std::make_pair(nullptr, nullptr);
>+        return std::make_pair(getFunction, &getFunction->type());
>+    })();
>+
>+    AST::FunctionDeclaration* andFunction;
>+    AST::UnnamedType* andReturnType;
>+    std::tie(andFunction, andReturnType) = ([&]() -> OverloadResolution {
>+        auto computeAndArgumentType = [&](AST::UnnamedType& unnamedType) -> Optional<ResolvingType> {
>+            if (is<AST::ArrayReferenceType>(unnamedType))
>+                return { unnamedType.clone() };
>+            if (is<AST::ArrayType>(unnamedType))
>+                return { makeUniqueRef<AST::ArrayReferenceType>(Lexer::Token(propertyAccessExpression.origin()), AST::AddressSpace::Thread, downcast<AST::ArrayType>(unnamedType).type().clone()) };
>+            if (is<AST::PointerType>(unnamedType))
>+                return WTF::nullopt;
>+            return { makeUniqueRef<AST::PointerType>(Lexer::Token(propertyAccessExpression.origin()), AST::AddressSpace::Thread, downcast<AST::ArrayType>(unnamedType).type().clone()) };
>+        };
>+        auto computeAndReturnType = [&](AST::UnnamedType& unnamedType) -> AST::UnnamedType* {
>+            if (is<AST::PointerType>(unnamedType))
>+                return &downcast<AST::PointerType>(unnamedType).elementType();
>+            return nullptr;
>+        };
>+
>+        auto andArgumentType1 = computeAndArgumentType(wrappedBaseType);
>+        if (!andArgumentType1)
>+            return std::make_pair(nullptr, nullptr);
>+        Optional<ResolvingType> andArgumentType2;
>+        if (extraArgumentType)
>+            andArgumentType2 = ResolvingType(extraArgumentType->clone());
>+
>+        Vector<std::reference_wrapper<ResolvingType>> andArgumentTypes;
>+        andArgumentTypes.append(*andArgumentType1);
>+        if (andArgumentType2)
>+            andArgumentTypes.append(*andArgumentType2);
>+
>+        auto* andFunction = resolveFunctionOverloadImpl(propertyAccessExpression.possibleAndOverloads(), andArgumentTypes, castReturnType);
>+        if (!andFunction)
>+            return std::make_pair(nullptr, nullptr);
>+        return std::make_pair(andFunction, computeAndReturnType(andFunction->type()));
>+    })();
>+
>+    if (!getReturnType && !andReturnType) {
>+        setError();
>+        return;
>+    }
>+
>+    if (getReturnType && andReturnType && !matches(*getReturnType, *andReturnType)) {
>+        setError();
>+        return;
>+    }
>+
>+    AST::FunctionDeclaration* setFunction;
>+    AST::UnnamedType* setReturnType;
>+    std::tie(setFunction, setReturnType) = ([&]() -> OverloadResolution {
>+        ResolvingType setArgument1Type(wrappedBaseType.clone());
>+        Optional<ResolvingType> setArgumentType2;
>+        if (extraArgumentType)
>+            setArgumentType2 = ResolvingType(extraArgumentType->clone());
>+        ResolvingType setArgument3Type(getReturnType ? getReturnType->clone() : andReturnType->clone());
>+
>+        Vector<std::reference_wrapper<ResolvingType>> setArgumentTypes;
>+        setArgumentTypes.append(setArgument1Type);
>+        if (setArgumentType2)
>+            setArgumentTypes.append(*setArgumentType2);
>+        setArgumentTypes.append(setArgument3Type);
>+
>+        auto* setFunction = resolveFunctionOverloadImpl(propertyAccessExpression.possibleSetOverloads(), setArgumentTypes, castReturnType);
>+        if (!setFunction)
>+            return std::make_pair(nullptr, nullptr);
>+        return std::make_pair(setFunction, &setFunction->type());
>+    })();
>+
>+    if (setFunction) {
>+        if (!matches(setFunction->type(), wrappedBaseType)) {
>+            setError();
>+            return;
>+        }
>+    }
>+
>+    Optional<AST::AddressSpace> addressSpace;
>+    if (getReturnType || andReturnType) {
>+        // FIXME: The reference compiler has "else if (!node.base.isLValue && !baseType.isArrayRef)",
>+        // but I don't understand why it exists. I haven't written it here, and I'll investigate
>+        // if we can remove it from the reference compiler.
>+        if (is<AST::ReferenceType>(wrappedBaseType))
>+            addressSpace = downcast<AST::ReferenceType>(wrappedBaseType).addressSpace();
>+        else {
>+            auto addressSpaceIterator = m_addressSpaceMap.find(&propertyAccessExpression.base());
>+            ASSERT(addressSpaceIterator != m_addressSpaceMap.end());
>+            if (addressSpaceIterator->value)
>+                addressSpace = *addressSpaceIterator->value;
>+            else {
>+                setError();
>+                return;
>+            }
>+        }
>+    }
>+
>+    // FIXME: Generate the call expressions
>+
>+    assignType(propertyAccessExpression, getReturnType ? getReturnType->clone() : andReturnType->clone(), addressSpace);
>+}
>+
>+Optional<UniqueRef<AST::UnnamedType>> Checker::recurseAndWrapBaseType(AST::PropertyAccessExpression& propertyAccessExpression)
>+{
>+    auto baseInfo = recurseAndGetInfo(propertyAccessExpression.base());
>+    if (!baseInfo)
>+        return WTF::nullopt;
>+
>+    auto* baseType = getUnnamedType(baseInfo->resolvingType);
>+    if (!baseType) {
>+        setError();
>+        return WTF::nullopt;
>+    }
>+    auto& baseUnifyNode = baseType->unifyNode();
>+    if (is<AST::UnnamedType>(baseUnifyNode))
>+        return downcast<AST::UnnamedType>(baseUnifyNode).clone();
>+    ASSERT(is<AST::NamedType>(baseUnifyNode));
>+    return { AST::TypeReference::wrap(Lexer::Token(propertyAccessExpression.origin()), downcast<AST::NamedType>(baseUnifyNode)) };
>+}
>+
>+void Checker::visit(AST::DotExpression& dotExpression)
>+{
>+    auto baseType = recurseAndWrapBaseType(dotExpression);
>+    if (!baseType)
>+        return;
>+
>+    finishVisitingPropertyAccess(dotExpression, *baseType);
>+}
>+
>+void Checker::visit(AST::IndexExpression& indexExpression)
>+{
>+    auto baseType = recurseAndWrapBaseType(indexExpression);
>+    if (!baseType)
>+        return;
>+
>+    auto indexInfo = recurseAndGetInfo(indexExpression.indexExpression());
>+    if (!indexInfo)
>+        return;
>+    auto indexExpressionType = getUnnamedType(indexInfo->resolvingType);
>+    if (!indexExpressionType) {
>+        setError();
>+        return;
>+    }
>+
>+    finishVisitingPropertyAccess(indexExpression, WTFMove(*baseType), indexExpressionType);
>+}
>+
>+void Checker::visit(AST::VariableReference& variableReference)
>+{
>+    ASSERT(variableReference.variable());
>+    ASSERT(variableReference.variable()->type());
>+    
>+    Optional<AST::AddressSpace> addressSpace;
>+    if (!variableReference.variable()->isAnonymous())
>+        addressSpace = AST::AddressSpace::Thread;
>+    assignType(variableReference, variableReference.variable()->type()->clone(), addressSpace);
>+}
>+
>+void Checker::visit(AST::Return& returnStatement)
>+{
>+    ASSERT(returnStatement.function());
>+    if (returnStatement.value()) {
>+        auto valueInfo = recurseAndGetInfo(*returnStatement.value());
>+        if (!valueInfo)
>+            return;
>+        if (!matchAndCommit(valueInfo->resolvingType, returnStatement.function()->type()))
>+            setError();
>+        return;
>+    }
>+
>+    if (!matches(returnStatement.function()->type(), m_intrinsics.voidType()))
>+        setError();
>+}
>+
>+void Checker::visit(AST::PointerType&)
>+{
>+    // Following pointer types can cause infinite loops because of data structures
>+    // like linked lists.
>+    // FIXME: Make sure this function should be empty
>+}
>+
>+void Checker::visit(AST::ArrayReferenceType&)
>+{
>+    // Following array reference types can cause infinite loops because of data
>+    // structures like linked lists.
>+    // FIXME: Make sure this function should be empty
>+}
>+
>+void Checker::visit(AST::IntegerLiteral& integerLiteral)
>+{
>+    assignType(integerLiteral, adoptRef(*new ResolvableTypeReference(integerLiteral.type())));
>+}
>+
>+void Checker::visit(AST::UnsignedIntegerLiteral& unsignedIntegerLiteral)
>+{
>+    assignType(unsignedIntegerLiteral, adoptRef(*new ResolvableTypeReference(unsignedIntegerLiteral.type())));
>+}
>+
>+void Checker::visit(AST::FloatLiteral& floatLiteral)
>+{
>+    assignType(floatLiteral, adoptRef(*new ResolvableTypeReference(floatLiteral.type())));
>+}
>+
>+void Checker::visit(AST::NullLiteral& nullLiteral)
>+{
>+    assignType(nullLiteral, adoptRef(*new ResolvableTypeReference(nullLiteral.type())));
>+}
>+
>+void Checker::visit(AST::BooleanLiteral& booleanLiteral)
>+{
>+    assignType(booleanLiteral, AST::TypeReference::wrap(Lexer::Token(booleanLiteral.origin()), m_intrinsics.boolType()));
>+}
>+
>+void Checker::visit(AST::EnumerationMemberLiteral& enumerationMemberLiteral)
>+{
>+    ASSERT(enumerationMemberLiteral.enumerationDefinition());
>+    auto& enumerationDefinition = *enumerationMemberLiteral.enumerationDefinition();
>+    assignType(enumerationMemberLiteral, AST::TypeReference::wrap(Lexer::Token(enumerationMemberLiteral.origin()), enumerationDefinition));
>+}
>+
>+bool Checker::isBoolType(ResolvingType& resolvingType)
>+{
>+    return WTF::visit(WTF::makeVisitor([&](UniqueRef<AST::UnnamedType>& left) -> bool {
>+        return matches(left, m_intrinsics.boolType());
>+    }, [&](Ref<ResolvableTypeReference>& left) -> bool {
>+        return static_cast<bool>(matchAndCommit(m_intrinsics.boolType(), left->resolvableType()));
>+    }), resolvingType);
>+}
>+
>+bool Checker::recurseAndRequireBoolType(AST::Expression& expression)
>+{
>+    auto expressionInfo = recurseAndGetInfo(expression);
>+    if (!expressionInfo)
>+        return false;
>+    if (!isBoolType(expressionInfo->resolvingType)) {
>+        setError();
>+        return false;
>+    }
>+    return true;
>+}
>+
>+void Checker::visit(AST::LogicalNotExpression& logicalNotExpression)
>+{
>+    if (!recurseAndRequireBoolType(logicalNotExpression.operand()))
>+        return;
>+    assignType(logicalNotExpression, AST::TypeReference::wrap(Lexer::Token(logicalNotExpression.origin()), m_intrinsics.boolType()));
>+}
>+
>+void Checker::visit(AST::LogicalExpression& logicalExpression)
>+{
>+    if (!recurseAndRequireBoolType(logicalExpression.left()))
>+        return;
>+    if (!recurseAndRequireBoolType(logicalExpression.right()))
>+        return;
>+    assignType(logicalExpression, AST::TypeReference::wrap(Lexer::Token(logicalExpression.origin()), m_intrinsics.boolType()));
>+}
>+
>+void Checker::visit(AST::IfStatement& ifStatement)
>+{
>+    if (!recurseAndRequireBoolType(ifStatement.conditional()))
>+        return;
>+    checkErrorAndVisit(ifStatement.body());
>+    if (ifStatement.elseBody())
>+        checkErrorAndVisit(*ifStatement.elseBody());
>+}
>+
>+void Checker::visit(AST::WhileLoop& whileLoop)
>+{
>+    if (!recurseAndRequireBoolType(whileLoop.conditional()))
>+        return;
>+    checkErrorAndVisit(whileLoop.body());
>+}
>+
>+void Checker::visit(AST::DoWhileLoop& doWhileLoop)
>+{
>+    checkErrorAndVisit(doWhileLoop.body());
>+    recurseAndRequireBoolType(doWhileLoop.conditional());
>+}
>+
>+void Checker::visit(AST::ForLoop& forLoop)
>+{
>+    WTF::visit(WTF::makeVisitor([&](AST::VariableDeclarationsStatement& variableDeclarationsStatement) {
>+        checkErrorAndVisit(variableDeclarationsStatement);
>+    }, [&](UniqueRef<AST::Expression>& expression) {
>+        checkErrorAndVisit(expression);
>+    }), forLoop.initialization());
>+    if (error())
>+        return;
>+    if (forLoop.condition()) {
>+        if (!recurseAndRequireBoolType(*forLoop.condition()))
>+            return;
>+    }
>+    if (forLoop.increment())
>+        checkErrorAndVisit(*forLoop.increment());
>+    checkErrorAndVisit(forLoop.body());
>+}
>+
>+void Checker::visit(AST::SwitchStatement& switchStatement)
>+{
>+    auto* valueType = ([&]() -> AST::NamedType* {
>+        auto valueInfo = recurseAndGetInfo(switchStatement.value());
>+        if (!valueInfo)
>+            return nullptr;
>+        auto* valueType = getUnnamedType(valueInfo->resolvingType);
>+        if (!valueType)
>+            return nullptr;
>+        auto& valueUnifyNode = valueType->unifyNode();
>+        if (!is<AST::NamedType>(valueUnifyNode))
>+            return nullptr;
>+        auto& valueNamedUnifyNode = downcast<AST::NamedType>(valueUnifyNode);
>+        if (!(is<AST::NativeTypeDeclaration>(valueNamedUnifyNode) && downcast<AST::NativeTypeDeclaration>(valueNamedUnifyNode).isInt())
>+            && !is<AST::EnumerationDefinition>(valueNamedUnifyNode))
>+            return nullptr;
>+        return &valueNamedUnifyNode;
>+    })();
>+    if (!valueType) {
>+        setError();
>+        return;
>+    }
>+
>+    bool hasDefault = false;
>+    for (auto& switchCase : switchStatement.switchCases()) {
>+        checkErrorAndVisit(switchCase.block());
>+        if (!switchCase.value()) {
>+            hasDefault = true;
>+            continue;
>+        }
>+        bool success;
>+        switchCase.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& integerLiteral) {
>+            success = static_cast<bool>(matchAndCommit(*valueType, integerLiteral.type()));
>+        }, [&](AST::UnsignedIntegerLiteral& unsignedIntegerLiteral) {
>+            success = static_cast<bool>(matchAndCommit(*valueType, unsignedIntegerLiteral.type()));
>+        }, [&](AST::FloatLiteral& floatLiteral) {
>+            success = static_cast<bool>(matchAndCommit(*valueType, floatLiteral.type()));
>+        }, [&](AST::NullLiteral& nullLiteral) {
>+            success = static_cast<bool>(matchAndCommit(*valueType, nullLiteral.type()));
>+        }, [&](AST::BooleanLiteral&) {
>+            success = matches(*valueType, m_intrinsics.boolType());
>+        }, [&](AST::EnumerationMemberLiteral& enumerationMemberLiteral) {
>+            ASSERT(enumerationMemberLiteral.enumerationDefinition());
>+            success = matches(*valueType, *enumerationMemberLiteral.enumerationDefinition());
>+        }));
>+        if (!success) {
>+            setError();
>+            return;
>+        }
>+    }
>+
>+    for (size_t i = 0; i < switchStatement.switchCases().size(); ++i) {
>+        auto& firstCase = switchStatement.switchCases()[i];
>+        for (size_t j = i + 1; j < switchStatement.switchCases().size(); ++j) {
>+            auto& secondCase = switchStatement.switchCases()[j];
>+            
>+            if (static_cast<bool>(firstCase.value()) != static_cast<bool>(secondCase.value()))
>+                continue;
>+
>+            if (!static_cast<bool>(firstCase.value())) {
>+                setError();
>+                return;
>+            }
>+
>+            bool success = true;
>+            firstCase.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& firstIntegerLiteral) {
>+                secondCase.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& secondIntegerLiteral) {
>+                    success = firstIntegerLiteral.value() != secondIntegerLiteral.value();
>+                }, [&](AST::UnsignedIntegerLiteral& secondUnsignedIntegerLiteral) {
>+                    success = static_cast<int64_t>(firstIntegerLiteral.value()) != static_cast<int64_t>(secondUnsignedIntegerLiteral.value());
>+                }, [](auto&) {
>+                }));
>+            }, [&](AST::UnsignedIntegerLiteral& firstUnsignedIntegerLiteral) {
>+                secondCase.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& secondIntegerLiteral) {
>+                    success = static_cast<int64_t>(firstUnsignedIntegerLiteral.value()) != static_cast<int64_t>(secondIntegerLiteral.value());
>+                }, [&](AST::UnsignedIntegerLiteral& secondUnsignedIntegerLiteral) {
>+                    success = firstUnsignedIntegerLiteral.value() != secondUnsignedIntegerLiteral.value();
>+                }, [](auto&) {
>+                }));
>+            }, [&](AST::EnumerationMemberLiteral& firstEnumerationMemberLiteral) {
>+                secondCase.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral&) {
>+                }, [&](AST::EnumerationMemberLiteral& secondEnumerationMemberLiteral) {
>+                    ASSERT(firstEnumerationMemberLiteral.enumerationMember());
>+                    ASSERT(secondEnumerationMemberLiteral.enumerationMember());
>+                    success = firstEnumerationMemberLiteral.enumerationMember() != secondEnumerationMemberLiteral.enumerationMember();
>+                }, [](auto&) {
>+                }));
>+            }, [](auto&) {
>+            }));
>+        }
>+    }
>+
>+    if (!hasDefault) {
>+        if (is<AST::NativeTypeDeclaration>(*valueType)) {
>+            HashSet<int64_t> values;
>+            bool zeroValueExists;
>+            for (auto& switchCase : switchStatement.switchCases()) {
>+                int64_t value;
>+                switchCase.value()->visit(WTF::makeVisitor([&](AST::IntegerLiteral& integerLiteral) {
>+                    value = integerLiteral.valueForSelectedType();
>+                }, [&](AST::UnsignedIntegerLiteral& unsignedIntegerLiteral) {
>+                    value = unsignedIntegerLiteral.valueForSelectedType();
>+                }, [](auto&) {
>+                    ASSERT_NOT_REACHED();
>+                }));
>+                if (!value)
>+                    zeroValueExists = true;
>+                else
>+                    values.add(value);
>+            }
>+            bool success = true;
>+            downcast<AST::NativeTypeDeclaration>(*valueType).iterateAllValues([&](int64_t value) -> bool {
>+                if (!value) {
>+                    if (!zeroValueExists) {
>+                        success = false;
>+                        return true;
>+                    }
>+                    return false;
>+                }
>+                if (!values.contains(value)) {
>+                    success = false;
>+                    return true;
>+                }
>+                return false;
>+            });
>+            if (!success) {
>+                setError();
>+                return;
>+            }
>+        } else {
>+            ASSERT(is<AST::EnumerationDefinition>(*valueType));
>+            HashSet<AST::EnumerationMember*> values;
>+            for (auto& switchCase : switchStatement.switchCases()) {
>+                switchCase.value()->visit(WTF::makeVisitor([&](AST::EnumerationMemberLiteral& enumerationMemberLiteral) {
>+                    ASSERT(enumerationMemberLiteral.enumerationMember());
>+                    values.add(enumerationMemberLiteral.enumerationMember());
>+                }, [](auto&) {
>+                    ASSERT_NOT_REACHED();
>+                }));
>+            }
>+            for (auto& enumerationMember : downcast<AST::EnumerationDefinition>(*valueType).enumerationMembers()) {
>+                if (!values.contains(&enumerationMember.get())) {
>+                    setError();
>+                    return;
>+                }
>+            }
>+        }
>+    }
>+}
>+
>+void Checker::visit(AST::CommaExpression& commaExpression)
>+{
>+    ASSERT(commaExpression.list().size() > 0);
>+    Visitor::visit(commaExpression);
>+    if (error())
>+        return;
>+    auto lastInfo = getInfo(commaExpression.list().last());
>+    forwardType(commaExpression, lastInfo->resolvingType);
>+}
>+
>+void Checker::visit(AST::TernaryExpression& ternaryExpression)
>+{
>+    auto predicateInfo = recurseAndRequireBoolType(ternaryExpression.predicate());
>+    if (!predicateInfo)
>+        return;
>+
>+    auto bodyInfo = recurseAndGetInfo(ternaryExpression.bodyExpression());
>+    auto elseInfo = recurseAndGetInfo(ternaryExpression.elseExpression());
>+    
>+    auto resultType = matchAndCommit(bodyInfo->resolvingType, elseInfo->resolvingType);
>+    if (!resultType) {
>+        setError();
>+        return;
>+    }
>+
>+    assignType(ternaryExpression, WTFMove(*resultType));
>+}
>+
>+void Checker::visit(AST::CallExpression& callExpression)
>+{
>+    Vector<std::reference_wrapper<ResolvingType>> types;
>+    types.reserveInitialCapacity(callExpression.arguments().size());
>+    for (auto& argument : callExpression.arguments()) {
>+        auto argumentInfo = recurseAndGetInfo(argument);
>+        if (!argumentInfo)
>+            return;
>+        types.uncheckedAppend(argumentInfo->resolvingType);
>+    }
>+    if (callExpression.castReturnType()) {
>+        checkErrorAndVisit(callExpression.castReturnType()->get());
>+        if (error())
>+            return;
>+    }
>+
>+    ASSERT(callExpression.hasOverloads());
>+    auto* function = resolveFunctionOverloadImpl(*callExpression.overloads(), types, callExpression.castReturnType());
>+    if (!function) {
>+        if (auto newFunction = resolveByInstantiation(callExpression, types, m_intrinsics)) {
>+            m_program.append(WTFMove(*newFunction));
>+            function = &m_program.nativeFunctionDeclarations().last();
>+        }
>+    }
>+
>+    if (!function) {
>+        setError();
>+        return;
>+    }
>+
>+    for (size_t i = 0; i < function->parameters().size(); ++i) {
>+        if (!matchAndCommit(types[i].get(), *function->parameters()[i].type())) {
>+            setError();
>+            return;
>+        }
>+    }
>+
>+    callExpression.setFunction(*function);
>+
>+    assignType(callExpression, function->type().clone());
>+}
>+
>+bool check(Program& program)
>+{
>+    Checker checker(program.intrinsics(), program);
>+    checker.checkErrorAndVisit(program);
>+    if (checker.error())
>+        return false;
>+    return checker.assignTypes();
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLChecker.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLChecker.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f6f085778184fe547672101dfbe0120e636b9a88
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLChecker.h
>@@ -0,0 +1,42 @@
>+/*
>+ * Copyright (C) 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
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+class Program;
>+
>+bool check(Program&);
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.cpp b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..5bd54c9b910d1baaf6705184574a1696d41969ce
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.cpp
>@@ -0,0 +1,184 @@
>+/*
>+ * Copyright (C) 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
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "WHLSLGatherEntryPointItems.h"
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLArrayReferenceType.h"
>+#include "WHLSLArrayType.h"
>+#include "WHLSLFunctionDefinition.h"
>+#include "WHLSLInferTypes.h"
>+#include "WHLSLIntrinsics.h"
>+#include "WHLSLPointerType.h"
>+#include "WHLSLStructureDefinition.h"
>+#include "WHLSLTypeDefinition.h"
>+#include "WHLSLTypeReference.h"
>+#include "WHLSLVariableDeclaration.h"
>+#include "WHLSLVisitor.h"
>+#include <wtf/Optional.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+class Gatherer : public Visitor {
>+public:
>+    Gatherer(const Intrinsics& intrinsics, AST::Semantic* semantic = nullptr)
>+        : m_intrinsics(intrinsics)
>+        , m_currentSemantic(semantic)
>+    {
>+    }
>+
>+    virtual ~Gatherer() = default;
>+
>+    void reset()
>+    {
>+        m_currentSemantic = nullptr;
>+    }
>+
>+    Vector<EntryPointItem>&& takeEntryPointItems()
>+    {
>+        return WTFMove(m_entryPointItems);
>+    }
>+
>+    void visit(AST::EnumerationDefinition&)
>+    {
>+        if (!m_currentSemantic) {
>+            setError();
>+            return;
>+        }
>+        m_entryPointItems.append(EntryPointItem(m_typeReferences.last().get(), *m_currentSemantic));
>+    }
>+
>+    void visit(AST::NativeTypeDeclaration& nativeTypeDeclaration)
>+    {
>+        if (!m_currentSemantic) {
>+            setError();
>+            return;
>+        }
>+        if (matches(nativeTypeDeclaration, m_intrinsics.voidType())) {
>+            setError();
>+            return;
>+        }
>+
>+        m_entryPointItems.append(EntryPointItem(m_typeReferences.last().get(), *m_currentSemantic));
>+    }
>+
>+    void visit(AST::StructureDefinition& structureDefinition)
>+    {
>+        if (m_currentSemantic) {
>+            setError();
>+            return;
>+        }
>+
>+        for (auto& structureElement : structureDefinition.structureElements()) {
>+            if (structureElement.semantic())
>+                m_currentSemantic = &*structureElement.semantic();
>+            checkErrorAndVisit(structureElement);
>+        }
>+    }
>+
>+    void visit(AST::TypeDefinition& typeDefinition)
>+    {
>+        checkErrorAndVisit(typeDefinition.type());
>+    }
>+
>+    void visit(AST::TypeReference& typeReference)
>+    {
>+        ASSERT(typeReference.resolvedType());
>+        m_typeReferences.append(typeReference);
>+        auto depth = m_typeReferences.size();
>+        checkErrorAndVisit(*typeReference.resolvedType());
>+        ASSERT_UNUSED(depth, m_typeReferences.size() == depth);
>+    }
>+
>+    void visit(AST::PointerType& pointerType)
>+    {
>+        if (!m_currentSemantic) {
>+            setError();
>+            return;
>+        }
>+        m_entryPointItems.append(EntryPointItem(pointerType, *m_currentSemantic));
>+    }
>+
>+    void visit(AST::ArrayReferenceType& arrayReferenceType)
>+    {
>+        if (!m_currentSemantic) {
>+            setError();
>+            return;
>+        }
>+        m_entryPointItems.append(EntryPointItem(arrayReferenceType, *m_currentSemantic));
>+    }
>+
>+    void visit(AST::ArrayType& arrayType)
>+    {
>+        if (!m_currentSemantic) {
>+            setError();
>+            return;
>+        }
>+        m_entryPointItems.append(EntryPointItem(arrayType, *m_currentSemantic));
>+    }
>+
>+    void visit(AST::VariableDeclaration& variableDeclaration)
>+    {
>+        ASSERT(!m_currentSemantic);
>+        if (variableDeclaration.semantic())
>+            m_currentSemantic = &*variableDeclaration.semantic();
>+        if (variableDeclaration.type())
>+            checkErrorAndVisit(*variableDeclaration.type());
>+    }
>+
>+private:
>+    const Intrinsics& m_intrinsics;
>+    AST::Semantic* m_currentSemantic { nullptr };
>+    Vector<std::reference_wrapper<AST::TypeReference>> m_typeReferences;
>+    Vector<EntryPointItem> m_entryPointItems;
>+};
>+
>+Optional<EntryPointItems> gatherEntryPointItems(const Intrinsics& intrinsics, AST::FunctionDefinition& functionDefinition)
>+{
>+    ASSERT(functionDefinition.entryPointType());
>+    Gatherer inputGatherer(intrinsics);
>+    for (auto& parameter : functionDefinition.parameters()) {
>+        inputGatherer.reset();
>+        inputGatherer.checkErrorAndVisit(parameter);
>+        if (inputGatherer.error())
>+            return WTF::nullopt;
>+    }
>+    Gatherer outputGatherer(intrinsics, functionDefinition.semantic() ? &*functionDefinition.semantic() : nullptr);
>+    outputGatherer.checkErrorAndVisit(functionDefinition.type());
>+    if (outputGatherer.error())
>+        return WTF::nullopt;
>+
>+    return {{ inputGatherer.takeEntryPointItems(), outputGatherer.takeEntryPointItems() }};
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9d4f7dd84457fea60691a65eb3f1d7f3a5489308
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.h
>@@ -0,0 +1,69 @@
>+/*
>+ * Copyright (C) 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
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLSemantic.h"
>+#include <wtf/Optional.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class FunctionDefinition;
>+
>+}
>+
>+class Intrinsics;
>+class UnnamedType;
>+
>+struct EntryPointItem {
>+    EntryPointItem(AST::UnnamedType& unnamedType, AST::Semantic& semantic)
>+        : unnamedType(unnamedType)
>+        , semantic(semantic)
>+    {
>+    }
>+
>+    AST::UnnamedType& unnamedType;
>+    AST::Semantic& semantic;
>+};
>+
>+struct EntryPointItems {
>+    Vector<EntryPointItem> inputs;
>+    Vector<EntryPointItem> outputs;
>+};
>+
>+Optional<EntryPointItems> gatherEntryPointItems(const Intrinsics&, AST::FunctionDefinition&);
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Sources.txt b/Source/WebCore/Sources.txt
>index 0d256353d74abd62663024bd8054c950e0738103..63f09611b682c18942163422f8cf035bb4280906 100644
>--- a/Source/WebCore/Sources.txt
>+++ b/Source/WebCore/Sources.txt
>@@ -309,6 +309,8 @@ Modules/webgpu/DOMWindowWebGPU.cpp
> Modules/webgpu/WHLSL/WHLSLInferTypes.cpp
> Modules/webgpu/WHLSL/WHLSLLexer.cpp
> Modules/webgpu/WHLSL/WHLSLParser.cpp
>+Modules/webgpu/WHLSL/WHLSLChecker.cpp
>+Modules/webgpu/WHLSL/WHLSLGatherEntryPointItems.cpp
> Modules/webgpu/WHLSL/WHLSLCheckDuplicateFunctions.cpp
> Modules/webgpu/WHLSL/WHLSLRecursiveTypeChecker.cpp
> Modules/webgpu/WHLSL/WHLSLSynthesizeArrayOperatorLength.cpp
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index 6493844b88d5064341250b4ddd5fc05135b87777..4a0b16d2437efcd689fa227c325025cc9dca55cf 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -6415,6 +6415,10 @@
> 		1C81B9560E97330800266E07 /* InspectorController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorController.h; sourceTree = "<group>"; };
> 		1C81B9570E97330800266E07 /* InspectorController.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = InspectorController.cpp; sourceTree = "<group>"; };
> 		1C81B9580E97330800266E07 /* InspectorClient.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorClient.h; sourceTree = "<group>"; };
>+		1C840B9721EC400700D0500D /* WHLSLChecker.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLChecker.h; sourceTree = "<group>"; };
>+		1C840B9921EC400800D0500D /* WHLSLGatherEntryPointItems.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLGatherEntryPointItems.cpp; sourceTree = "<group>"; };
>+		1C840B9A21EC400900D0500D /* WHLSLGatherEntryPointItems.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLGatherEntryPointItems.h; sourceTree = "<group>"; };
>+		1C840B9B21EC400900D0500D /* WHLSLChecker.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLChecker.cpp; sourceTree = "<group>"; };
> 		1C904DF90BA9D2C80081E9D0 /* Version.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = Version.xcconfig; sourceTree = "<group>"; };
> 		1CA19E030DC255950065A994 /* EventLoopMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = EventLoopMac.mm; sourceTree = "<group>"; };
> 		1CA19E150DC255CA0065A994 /* EventLoop.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = EventLoop.h; sourceTree = "<group>"; };
>@@ -13323,6 +13327,10 @@
> 		C21BF73A21CD8D7000227979 /* WHLSLProgram.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLProgram.h; sourceTree = "<group>"; };
> 		C21BF74221CD963B00227979 /* WHLSLStandardLibrary.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; name = WHLSLStandardLibrary.h; path = DerivedSources/WebCore/WHLSLStandardLibrary.h; sourceTree = BUILT_PRODUCTS_DIR; };
> 		C21BF74521CD969800227979 /* WHLSLStandardLibrary.txt */ = {isa = PBXFileReference; lastKnownFileType = text; path = WHLSLStandardLibrary.txt; sourceTree = "<group>"; };
>+		C21DF2E71D9E4E9900F5B24C /* CSSFontVariationValue.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CSSFontVariationValue.cpp; sourceTree = "<group>"; };
>+		C21DF2E81D9E4E9900F5B24C /* CSSFontVariationValue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontVariationValue.h; sourceTree = "<group>"; };
>+		C234A98521E886A9003C984D /* WHLSLVisitor.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLVisitor.cpp; sourceTree = "<group>"; };
>+		C234A98721E886AD003C984D /* WHLSLVisitor.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLVisitor.h; sourceTree = "<group>"; };
> 		C234A98A21E8883E003C984D /* WHLSLNameResolver.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLNameResolver.cpp; sourceTree = "<group>"; };
> 		C234A98C21E8883E003C984D /* WHLSLNameResolver.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLNameResolver.h; sourceTree = "<group>"; };
> 		C234A98D21E88884003C984D /* WHLSLNameContext.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLNameContext.cpp; sourceTree = "<group>"; };
>@@ -13346,10 +13354,6 @@
> 		C234A9B521E92C23003C984D /* WHLSLSynthesizeStructureAccessors.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLSynthesizeStructureAccessors.h; sourceTree = "<group>"; };
> 		C234A9B621E92CC0003C984D /* WHLSLIntrinsics.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLIntrinsics.h; sourceTree = "<group>"; };
> 		C234A9B721E92CC1003C984D /* WHLSLIntrinsics.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLIntrinsics.cpp; sourceTree = "<group>"; };
>-		C21DF2E71D9E4E9900F5B24C /* CSSFontVariationValue.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CSSFontVariationValue.cpp; sourceTree = "<group>"; };
>-		C21DF2E81D9E4E9900F5B24C /* CSSFontVariationValue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontVariationValue.h; sourceTree = "<group>"; };
>-		C234A98521E886A9003C984D /* WHLSLVisitor.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLVisitor.cpp; sourceTree = "<group>"; };
>-		C234A98721E886AD003C984D /* WHLSLVisitor.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLVisitor.h; sourceTree = "<group>"; };
> 		C2458E611FE8979E00594759 /* FontCacheCoreText.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = FontCacheCoreText.h; sourceTree = "<group>"; };
> 		C26017A11C72DC9900F74A16 /* CSSFontFaceSet.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CSSFontFaceSet.cpp; sourceTree = "<group>"; };
> 		C26017A21C72DC9900F74A16 /* CSSFontFaceSet.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontFaceSet.h; sourceTree = "<group>"; };
>@@ -25415,6 +25419,10 @@
> 				C21BF6F121CD898D00227979 /* AST */,
> 				C234A9B221E92C1F003C984D /* WHLSLCheckDuplicateFunctions.cpp */,
> 				C234A9AE21E92C1A003C984D /* WHLSLCheckDuplicateFunctions.h */,
>+				1C840B9B21EC400900D0500D /* WHLSLChecker.cpp */,
>+				1C840B9721EC400700D0500D /* WHLSLChecker.h */,
>+				1C840B9921EC400800D0500D /* WHLSLGatherEntryPointItems.cpp */,
>+				1C840B9A21EC400900D0500D /* WHLSLGatherEntryPointItems.h */,
> 				C234A99A21E90F56003C984D /* WHLSLInferTypes.cpp */,
> 				C234A99B21E90F57003C984D /* WHLSLInferTypes.h */,
> 				C234A9B721E92CC1003C984D /* WHLSLIntrinsics.cpp */,

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Attachments on bug 193080: 358187 | 358234 | 358247 | 358304 | 358378 | 358425 | 358482 | 358582 | 358621 | 358667 | 358719 | 358936 | 359002 | 359018 | 359019 | 359122