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Front-end: propagate specialization-constness through conversions and swizzles.

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This commit is contained in:
John Kessenich 2016-03-20 18:45:23 -06:00
parent a5845766e0
commit 6d2b07dc39
3 changed files with 15 additions and 2 deletions
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10
glslang/MachineIndependent/Intermediate.cpp
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@ -262,6 +262,7 @@ TIntermTyped* TIntermediate::addUnaryMath(TOperator op, TIntermTyped* child, TSo
//
// For constructors, we are now done, it was all in the conversion.
// TODO: but, did this bypass constant folding?
//
switch (op) {
case EOpConstructInt:
@ -291,7 +292,7 @@ TIntermTyped* TIntermediate::addUnaryMath(TOperator op, TIntermTyped* child, TSo
if (child->getAsConstantUnion())
return child->getAsConstantUnion()->fold(op, node->getType());
// If it's a specialiation constant, the result is too.
// If it's a specialization constant, the result is too.
if (child->getType().getQualifier().isSpecConstant())
node->getWritableType().getQualifier().makeSpecConstant();
@ -616,6 +617,12 @@ TIntermTyped* TIntermediate::addConversion(TOperator op, const TType& type, TInt
newNode->setLoc(node->getLoc());
newNode->setOperand(node);
// TODO: it seems that some unary folding operations should occur here, but are not
// Propagate specialization-constant-ness.
if (node->getType().getQualifier().isSpecConstant())
newNode->getWritableType().getQualifier().makeSpecConstant();
return newNode;
}
@ -883,7 +890,6 @@ TIntermConstantUnion* TIntermediate::addConstantUnion(double d, TBasicType baseT
TIntermTyped* TIntermediate::addSwizzle(TVectorFields& fields, const TSourceLoc& loc)
{
TIntermAggregate* node = new TIntermAggregate(EOpSequence);
node->setLoc(loc);