microsoft / microsoft/DirectXShaderCompiler
Passing constant integer arguments to dst causes ICE
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bug
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- Dominant language
- C++
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Description
Description
Passing integer arguments to dst causes an ICE.
Maybe related to https://github.com/microsoft/DirectXShaderCompiler/issues/8428?
Steps to Reproduce
Shader:
[shader("pixel")]
void PSMain() {
int4 r = dst(1, 1);
if (r.x != 1) discard;
}
Command: dxc.exe -T ps_6_6 -E PSMain dst_int.hlsl
Actual Behavior
error: llvm::cast() argument of incompatible type!
Environment
dxcompiler.dll: 1.9(5184-21d28f72)(1.9.2602.17) - 1.9.2602.17 (21d28f727)- Windows 10
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the crash with dxc.exe -T ps_6_6 -E PSMain using the provided dst_int.hlsl shader. Trace the compiler path handling constant integer arguments to dst and verify completion by compiling the shader without an LLVM cast error and preserving the expected result.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 52/100