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Bug 1102187 - IonMonkey: Use NumberEqualsInt32 to check if double fits in an integer, r=h4writer

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This commit is contained in:
ZongShen Shen 2015-01-28 19:30:24 -08:00
parent 7bf2f630e4
commit 880729b01f
1 changed files with 5 additions and 6 deletions
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11
js/src/jit/MIR.cpp
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@ -2058,18 +2058,17 @@ MMinMax::foldsTo(TempAllocator &alloc)
// The folded MConstant should maintain the same MIRType with
// the original MMinMax.
MConstant *constant;
if (type() == MIRType_Int32) {
int32_t cast = static_cast<int32_t>(result);
MOZ_ASSERT(cast == result);
constant = MConstant::New(alloc, Int32Value(cast));
int32_t cast;
if (mozilla::NumberEqualsInt32(result, &cast))
return MConstant::New(alloc, Int32Value(cast));
} else {
MOZ_ASSERT(IsFloatingPointType(type()));
constant = MConstant::New(alloc, DoubleValue(result));
MConstant *constant = MConstant::New(alloc, DoubleValue(result));
if (type() == MIRType_Float32)
constant->setResultType(MIRType_Float32);
return constant;
}
return constant;
}
MDefinition *operand = lhs()->isConstantValue() ? rhs() : lhs();