| Issue |
149345
|
| Summary |
[HLSL][DirectX]
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
spall
|
https://godbolt.org/z/To9e81PWs
```
StructuredBuffer<uint4> In : register(t0);
RWStructuredBuffer<uint4> Out : register(u1);
[numthreads(1,1,1)]
void main() {
Out[3] = AddUint64(In[0], In[0]);
}
```
This code, when compiled, produces invalid DXIL
```
# .---command stdout------------
# | Function: main: error: Instructions must be of an allowed type.
# | note: at '%.upto077112 = insertelement <2 x i1> undef, i1 %.elem1, i32 0' in block 'entry' of function 'main'.
# | Function: main: error: Instructions must be of an allowed type.
# | note: at '%58 = insertelement <2 x i1> %.upto077112, i1 %.elem17, i32 1' in block 'entry' of function 'main'.
# | Function: main: error: Instructions must be of an allowed type.
# | note: at '%.i09113 = extractelement <2 x i1> %58, i32 0' in block 'entry' of function 'main'.
# | Function: main: error: Instructions must be of an allowed type.
# | note: at '%.i110114 = extractelement <2 x i1> %58, i32 1' in block 'entry' of function 'main'.
# | Validation failed.
# |
# `-----------------------------
# .---command stderr------------
# | clang-dxc: error: dxv command failed with exit code 1 (use -v to see invocation)
# `-----------------------------
# error: command failed with exit status: 1
```
These 'insertelement' and 'extractelement' instructions are created by the scalarizer pass, but are unnecessary and could be eliminated.
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