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

Issue 10123007: Optimize ~~(expr) in optimized code. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 8 years, 8 months ago
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Index: src/mips/lithium-mips.cc
===================================================================
--- src/mips/lithium-mips.cc (revision 11385)
+++ src/mips/lithium-mips.cc (working copy)
@@ -1296,6 +1296,7 @@
LInstruction* LChunkBuilder::DoBitNot(HBitNot* instr) {
ASSERT(instr->value()->representation().IsInteger32());
ASSERT(instr->representation().IsInteger32());
+ if (instr->HasNoUses()) return NULL;
LOperand* value = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LBitNotI(value));
}
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