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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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12
Test/baseResults/spv.8bitstorage-uint.frag.out
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@@ -204,8 +204,10 @@ spv.8bitstorage-uint.frag
115: 20(int) Constant 7
116: 20(int) Constant 6
117: TypePointer Uniform 9(int)
167: 39(ivec2) ConstantComposite 82 10
170: 9(int) Constant 3
167: 6(int8_t) Constant 1
168: 6(int8_t) Constant 2
169: 7(i8vec2) ConstantComposite 167 168
171: 6(int8_t) Constant 3
4(main): 2 Function None 3
5: Label
69(x0): 68(ptr) Variable Function
@@ -325,10 +327,8 @@ spv.8bitstorage-uint.frag
165: 6(int8_t) Load 164
166: 28(ptr) AccessChain 19(b2) 21
Store 166 165
168: 7(i8vec2) UConvert 167
169: 42(ptr) AccessChain 19(b2) 32
Store 169 168
171: 6(int8_t) UConvert 170
170: 42(ptr) AccessChain 19(b2) 32
Store 170 169
172: 28(ptr) AccessChain 19(b2) 21
Store 172 171
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