| Issue |
164496
|
| Summary |
[HLSL][SPIR-V] Invalid LLVM IR `"convergencectrl"(token poison)` for wave intrinsics `WaveActiveMax`
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
luciechoi
|
```
RWStructuredBuffer<uint> Out : register(u0);
[numthreads(8,1,1)]
void main(uint3 TID : SV_GroupThreadID) {
for (uint i = 0; i < 8; i++) {
if (i == TID.x) {
Out[TID.x] = WaveActiveMax(TID.x);
break;
}
}
}
```
```
Convergence control tokens can only be produced by calls to the convergence control intrinsics.
token poison
%hlsl.wave.active.max2.i = call spir_func i32 @llvm.spv.wave.reduce.umax.i32(i32 %0) [ "convergencectrl"(token poison) ]
in function main
fatal error: error in backend: Broken function found, compilation aborted!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
```
I was able to reproduce this error locally. Found while working on https://github.com/llvm/offload-test-suite/pull/473.
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