src/ia32/lithium-ia32.cc - Issue 150663005: Optimize redundant HCompareMap instructions with known successors.

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Unified Diff: src/ia32/lithium-ia32.cc

Issue 150663005: Optimize redundant HCompareMap instructions with known successors. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge

Patch Set: Created 6 years, 10 months ago

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Index: src/ia32/lithium-ia32.cc

diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc

index 4ebcb30ff8896a6e8c038fb74bd3ac3ff18583d5..27a5672901f0cd3287e61b768b26dac8c03d4294 100644

--- a/src/ia32/lithium-ia32.cc

+++ b/src/ia32/lithium-ia32.cc

@@ -1027,6 +1027,9 @@ LInstruction* LChunkBuilder::DoDebugBreak(HDebugBreak* instr) {

LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) {

+ LInstruction* goto_instr = CheckElideControlInstruction(instr);

+ if (goto_instr != NULL) return goto_instr;

ASSERT(instr->value()->representation().IsTagged());

LOperand* value = UseRegisterAtStart(instr->value());

return new(zone()) LCmpMapAndBranch(value);

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