| Issue |
147395
|
| Summary |
[DirectX] `llvm.lifetime.start/.end` intrinsics are not properly encoded in DXIL bitcode
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Icohedron
|
DXIL bitcode containing `llvm.lifetime.start/end` intrinsics emitted by Clang currently fail to validate under the DXIL validator (dxv). The encoding should be fixed to allow the validator and dxil-dis to read them properly.
Sample shader that Clang emits lifetime intrinsics for
```hlsl
uint2 Foo(uint2 a[2], uint i) {
return a[i];
}
cbuffer Constants {
uint2 arr[2];
}
RWStructuredBuffer<uint> output;
[numthreads(1, 1, 1)]
void CSMain(uint3 Tid : SV_DispatchThreadID) {
output[0] = Foo(arr, Tid.x).x;
}
```
https://godbolt.org/z/haz47M8fz
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