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MIPS: Remove extranous holder load in some prototype-chain checking cases

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Port r14136 (d091bc0e)

BUG=

Review URL: https://codereview.chromium.org/13636002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14142 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
palfia@homejinni.com 2013-04-04 15:41:58 +00:00
parent 9fd5eb52d4
commit f995f77cee
3 changed files with 2 additions and 5 deletions
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3
src/mips/lithium-codegen-mips.cc
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@ -5207,7 +5207,6 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
ASSERT(instr->temp()->Equals(instr->result()));
Register prototype_reg = ToRegister(instr->temp());
Register map_reg = ToRegister(instr->temp2());
@ -5220,8 +5219,6 @@ void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
for (int i = 0; i < maps->length(); i++) {
prototype_maps_.Add(maps->at(i), info()->zone());
}
__ LoadHeapObject(prototype_reg,
prototypes->at(prototypes->length() - 1));
} else {
for (int i = 0; i < prototypes->length(); i++) {
__ LoadHeapObject(prototype_reg, prototypes->at(i));

2
src/mips/lithium-mips.cc
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@ -1807,7 +1807,7 @@ LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
LUnallocated* temp1 = TempRegister();
LOperand* temp2 = TempRegister();
LCheckPrototypeMaps* result = new(zone()) LCheckPrototypeMaps(temp1, temp2);
return AssignEnvironment(Define(result, temp1));
return AssignEnvironment(result);
}

2
src/mips/lithium-mips.h
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@ -2184,7 +2184,7 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
};
class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 2> {
public:
LCheckPrototypeMaps(LOperand* temp, LOperand* temp2) {
temps_[0] = temp;