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Bug 936234 - Inline n-Ary Math.min and Math.max. r=shu

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This commit is contained in:
Sean Stangl 2013-11-07 15:19:55 -08:00
parent bc95c8a2b1
commit b1e7adaad5
1 changed files with 19 additions and 15 deletions
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34
js/src/jit/MCallOptimize.cpp
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@ -883,32 +883,36 @@ IonBuilder::inlineMathFRound(CallInfo &callInfo)
IonBuilder::InliningStatus
IonBuilder::inlineMathMinMax(CallInfo &callInfo, bool max)
{
if (callInfo.argc() != 2 || callInfo.constructing())
if (callInfo.argc() < 2 || callInfo.constructing())
return InliningStatus_NotInlined;
MIRType returnType = getInlineReturnType();
if (!IsNumberType(returnType))
return InliningStatus_NotInlined;
MIRType arg0Type = callInfo.getArg(0)->type();
if (!IsNumberType(arg0Type))
return InliningStatus_NotInlined;
MIRType arg1Type = callInfo.getArg(1)->type();
if (!IsNumberType(arg1Type))
return InliningStatus_NotInlined;
for (unsigned i = 0; i < callInfo.argc(); i++) {
MIRType argType = callInfo.getArg(i)->type();
if (!IsNumberType(argType))
return InliningStatus_NotInlined;
if (returnType == MIRType_Int32 &&
(arg0Type == MIRType_Double || arg1Type == MIRType_Double))
{
// We would need to inform TI, if we happen to return a double.
return InliningStatus_NotInlined;
// We would need to inform TI if we happen to return a double.
if (returnType == MIRType_Int32 && IsFloatingPointType(argType))
return InliningStatus_NotInlined;
}
callInfo.unwrapArgs();
MMinMax *ins = MMinMax::New(callInfo.getArg(0), callInfo.getArg(1), returnType, max);
current->add(ins);
current->push(ins);
// Chain N-1 MMinMax instructions to compute the MinMax.
MMinMax *last = MMinMax::New(callInfo.getArg(0), callInfo.getArg(1), returnType, max);
current->add(last);
for (unsigned i = 2; i < callInfo.argc(); i++) {
MMinMax *ins = MMinMax::New(last, callInfo.getArg(i), returnType, max);
current->add(ins);
last = ins;
}
current->push(last);
return InliningStatus_Inlined;
}