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HLSL: Fix #846: support mixed ternary types.

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Vector conditions properly convert the true/false expression types to same
width vector as the condition.

Scalar conditions make the true/false expressions convert to each other.
This commit is contained in:
John Kessenich 2017-04-20 21:32:16 -06:00
parent 0603a383c1
commit 32a385e9d7
3 changed files with 759 additions and 593 deletions
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1101
Test/baseResults/hlsl.conditional.frag.out
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File diff suppressed because it is too large Load Diff

11
Test/hlsl.conditional.frag
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@ -8,7 +8,14 @@ float4 vectorCond()
{
return (c4 ? t4 : f4) +
(c4 ? t : f ) +
(t4 < f4 ? t4 : f4);
(t4 < f4 ? t4 : f4) +
(c4 ? t : f4);
}
float4 scalarCond()
{
float4 ret = t != f ? t * f4 : 1;
return ret;
}
float2 fbSelect(bool2 cnd, float2 src0, float2 src1)
@ -30,6 +37,6 @@ float4 PixelShaderFunction(float4 input) : COLOR0
e = a = b ? c = d : 10, b = a ? d = c : 11;
float4 f;
f = ret.x < input.y ? c * input : d * input;
return e * ret + f + vectorCond() +
return e * ret + f + vectorCond() + scalarCond() +
float4(fbSelect(bool2(true, false), float2(1.0, 2.0), float2(3.0, 4.0)), 10.0, 10.0);
}

28
glslang/MachineIndependent/Intermediate.cpp
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@ -836,6 +836,9 @@ TIntermTyped* TIntermediate::addUniShapeConversion(TOperator op, const TType& ty
case EOpAssign:
break;
case EOpMix:
break;
default:
return node;
}
@ -911,6 +914,8 @@ void TIntermediate::addBiShapeConversion(TOperator op, TIntermTyped*& lhsNode, T
case EOpAnd:
case EOpInclusiveOr:
case EOpExclusiveOr:
case EOpMix:
break;
default:
@ -1422,19 +1427,17 @@ TIntermTyped* TIntermediate::addSelection(TIntermTyped* cond, TIntermTyped* true
return nullptr;
}
// After conversion, types have to match.
if (falseBlock->getType() != trueBlock->getType())
return nullptr;
// Handle a vector condition as a mix
if (!cond->getType().isScalarOrVec1()) {
TType targetVectorType(trueBlock->getType().getBasicType(), EvqTemporary,
cond->getType().getVectorSize());
// smear true/false operations if needed
if (trueBlock->getType().isScalarOrVec1())
trueBlock = addShapeConversion(targetVectorType, trueBlock);
if (falseBlock->getType().isScalarOrVec1())
falseBlock = addShapeConversion(targetVectorType, falseBlock);
// smear true/false operands as needed
trueBlock = addUniShapeConversion(EOpMix, targetVectorType, trueBlock);
falseBlock = addUniShapeConversion(EOpMix, targetVectorType, falseBlock);
// After conversion, types have to match.
if (falseBlock->getType() != trueBlock->getType())
return nullptr;
// make the mix operation
TIntermAggregate* mix = makeAggregate(loc);
@ -1449,6 +1452,13 @@ TIntermTyped* TIntermediate::addSelection(TIntermTyped* cond, TIntermTyped* true
// Now have a scalar condition...
// Convert true and false expressions to matching types
addBiShapeConversion(EOpMix, trueBlock, falseBlock);
// After conversion, types have to match.
if (falseBlock->getType() != trueBlock->getType())
return nullptr;
// Eliminate the selection when the condition is a scalar and all operands are constant.
if (cond->getAsConstantUnion() && trueBlock->getAsConstantUnion() && falseBlock->getAsConstantUnion()) {
if (cond->getAsConstantUnion()->getConstArray()[0].getBConst())