| Issue |
147394
|
| Summary |
[DirectX] `llvm.lifetime.start/.end` intrinsics should not be emitted in DXIL versions < 1.6
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Icohedron
|
`llvm.lifetime.start/.end` intrinsics are only supported in DXIL version 1.6 and later.
Currently Clang allows these intrinsics to be emitted in unsupported shader models.
For DXIL version < 1.6, lifetime intrinsics should be replaced with stores of 0 or undef as in DXC:
https://github.com/microsoft/DirectXShaderCompiler/blob/d751c827ed3b61e87fdf57d0f424cb2d7af30cd0/lib/HLSL/DxilPreparePasses.cpp#L693-L699
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