microsoft / microsoft/DirectXShaderCompiler
`-Wimplicit-int-float-conversion` or `-Wconversion` don't report "float -> int" conversion warnings
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Description
Description
I expect -Wimplicit-int-float-conversion or -Wconversion to produce a warning when doing implicit "float -> int" conversion.
Example in Clang: https://godbolt.org/z/WahdMPs71
Steps to Reproduce
StructuredBuffer<uint> In;
RWStructuredBuffer<float> Out;
[numthreads(1,1,1)]
void main(uint thread : SV_DispatchThreadID)
{
Out[thread] = In[thread];
}
Commandline: -Wconversion -WX -T cs_6_6 -E main
Godbolt: https://godbolt.org/z/6xKasdxdx
Actual Behavior
DXC produces no warnings
Environment
- DXC version 1.8.2407
- Host Operating System W11 23H2
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 supplied HLSL compute-shader example with DXC using -Wconversion -WX -T cs_6_6 -E main, then compare its diagnostics with the linked Clang result. Done means DXC reports the implicit float-to-int conversion warning for the shown assignment.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100