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Bug 943852: need not set resultTypeSet for get prop on known type (r=h4writer).

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This commit is contained in:
Felix S. Klock II 2013-12-19 13:55:04 +01:00
parent 523d6f4c24
commit e5cc38033a
1 changed files with 8 additions and 3 deletions
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11
js/src/jit/IonBuilder.cpp
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@ -6770,11 +6770,14 @@ IonBuilder::getElemTryScalarElemOfTypedObject(bool *emitted,
// uint32 reads that may produce either doubles or integers.
types::TemporaryTypeSet *resultTypes = bytecodeTypes(pc);
bool allowDouble = resultTypes->hasType(types::Type::DoubleType());
// Note: knownType is not necessarily in resultTypes; e.g. if we
// have only observed integers coming out of float array.
MIRType knownType = MIRTypeForTypedArrayRead(elemTypeRepr->type(), allowDouble);
// Note: we can ignore the type barrier here, we know the type must
// be valid and unbarriered.
// be valid and unbarriered. Also, need not set resultTypeSet,
// because knownType is scalar and a resultTypeSet would provide
// no useful additional info.
load->setResultType(knownType);
load->setResultTypeSet(resultTypes);
*emitted = true;
return true;
@ -8406,8 +8409,10 @@ IonBuilder::getPropTryScalarPropOfTypedObject(bool *emitted,
MLoadTypedArrayElement *load =
MLoadTypedArrayElement::New(alloc(), elements, scaledOffset,
fieldTypeRepr->type());
// Note: need not set resultTypeSet because knownType is scalar
// and a resultTypeSet would provide no useful additional info.
load->setResultType(knownType);
load->setResultTypeSet(resultTypes);
current->add(load);
current->push(load);
*emitted = true;