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Bug 894582 - IonMonkey: Constant fold arithm operations with double output that fits in int32. r=jandem

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This commit is contained in:
Hannes Verschore 2013-07-19 16:21:05 -04:00
parent 9f146077b1
commit 0d2f2c46c9
1 changed files with 5 additions and 0 deletions
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5
js/src/ion/MIR.cpp
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@ -122,6 +122,11 @@ EvaluateConstantOperands(MBinaryInstruction *ins, bool *ptypeChange = NULL)
MOZ_ASSUME_UNREACHABLE("NYI"); MOZ_ASSUME_UNREACHABLE("NYI");
} }
// setNumber eagerly transforms a number to int32.
// Transform back to double, if the output type is double.
if (ins->type() == MIRType_Double && ret.isInt32())
ret.setDouble(ret.toNumber());
if (ins->type() != MIRTypeFromValue(ret)) { if (ins->type() != MIRTypeFromValue(ret)) {
if (ptypeChange) if (ptypeChange)
*ptypeChange = true; *ptypeChange = true;