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Add conversion folding when the source is a constant.

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This change adds unary conversion folding when the source is a constant.
This fixes an ISV issue whereby:

```
const float16_t f = float16_t(42.0);
```

Wouldn't compile because the conversion operator would always produce an
EvqTemporary when it could have produced an EvqConst.

I've also added a test case that proves out that all basic-type to
basic-type conversions work.
This commit is contained in:
Neil Henning 2018-11-26 10:17:33 +00:00
parent 0e6c82ce93
commit 81a63f1de0
11 changed files with 1012 additions and 40 deletions
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2
glslang/MachineIndependent/localintermediate.h
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@ -732,7 +732,7 @@ protected:
bool specConstantPropagates(const TIntermTyped&, const TIntermTyped&);
void performTextureUpgradeAndSamplerRemovalTransformation(TIntermNode* root);
bool isConversionAllowed(TOperator op, TIntermTyped* node) const;
TIntermUnary* createConversion(TBasicType convertTo, TIntermTyped* node) const;
TIntermTyped* createConversion(TBasicType convertTo, TIntermTyped* node) const;
std::tuple<TBasicType, TBasicType> getConversionDestinatonType(TBasicType type0, TBasicType type1, TOperator op) const;
bool extensionRequested(const char *extension) const {return requestedExtensions.find(extension) != requestedExtensions.end();}
static const char* getResourceName(TResourceType);