141624 2015-02-15 14:41:02 -0800 DFG::PutStackSinkingPhase should eliminate GetStacks that have an obviously known source, and emit GetStacks when the stack's value is needed and none is deferred 2015-03-16 10:39:54 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) All All RESOLVED FIXED P2 Normal --- 142695 142697 141174 1 fpizlo fpizlo barraclough benjamin commit-queue ggaren mark.lam mhahnenb mmirman msaboff nrotem oliver saam sam simon.fraser oldest_to_newest 1069324 0 fpizlo 2015-02-15 14:41:02 -0800 Currently if we have a PutLocal/GetLocal pair, then we will sink the PutLocal to the GetLocal. Instead, we should eliminate the GetLocal entirely. Probably this doesn't arise too much because we would have done some CSE, but it would be best if we just did the right thing here. 1076998 1 248599 fpizlo 2015-03-13 13:01:51 -0700 Created attachment 248599 the patch 1077007 2 fpizlo 2015-03-13 13:18:57 -0700 Landed in http://trac.webkit.org/changeset/181487 1077153 3 simon.fraser 2015-03-14 09:01:22 -0700 This is causing a jsc test failure: https://build.webkit.org/builders/Apple%20Mavericks%20Release%20WK2%20%28Perf%29 Running Speedometer/Full.html (144 of 144) error: Speedometer/Full.html 1 0x108f858a3 JSC::DFG::(anonymous namespace)::PutStackSinkingPhase::run() 2 0x108f7c5f4 JSC::DFG::performPutStackSinking(JSC::DFG::Graph&) 3 0x108fd5cf9 JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) 4 0x108fd5601 JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*) 5 0x1090601d3 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*) 6 0x1093c5bd3 WTF::threadEntryPoint(void*) 7 0x1093c608f WTF::wtfThreadEntryPoint(void*) 8 0x7fff85ad7899 _pthread_body 9 0x7fff85ad772a _pthread_struct_init 10 0x7fff85adbfc9 thread_start 1077161 4 commit-queue 2015-03-14 10:43:13 -0700 Re-opened since this is blocked by bug 142695 1077303 5 248599 fpizlo 2015-03-15 18:59:00 -0700 Comment on attachment 248599 the patch This patch was broken, and it revealed some other issues in this phase. I'll have a new patch shortly. 1077311 6 248700 fpizlo 2015-03-15 20:54:19 -0700 Created attachment 248700 the patch 1077447 7 248700 ggaren 2015-03-16 10:30:02 -0700 Comment on attachment 248700 the patch r=me 1077455 8 fpizlo 2015-03-16 10:39:54 -0700 Landed in http://trac.webkit.org/changeset/181563 248599 2015-03-13 13:01:51 -0700 2015-03-15 18:59:00 -0700 the patch blah.patch text/plain 4684 fpizlo SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMTgxNDg0KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDIzIEBA CisyMDE1LTAzLTEzICBGaWxpcCBQaXpsbyAgPGZwaXpsb0BhcHBsZS5jb20+CisKKyAgICAgICAg REZHOjpQdXRTdGFja1NpbmtpbmdQaGFzZSBzaG91bGQgZWxpbWluYXRlIEdldFN0YWNrcyB0aGF0 IGhhdmUgYW4gb2J2aW91c2x5IGtub3duIHNvdXJjZQorICAgICAgICBodHRwczovL2J1Z3Mud2Vi 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