| Issue |
145370
|
| Summary |
[DirectX] Indexing into TGSM flattened arrays of vectors is incorrect
|
| Labels |
new issue
|
| Assignees |
Icohedron
|
| Reporter |
Icohedron
|
Indexing into an array of vectors located in thread group shared memory are incorrect
https://godbolt.org/z/nq5Pq88eh
https://godbolt.org/z/9fesTfKre
```hlsl
// compile args: -E CSMain -T cs_6_4 -enable-16bit-types
groupshared uint2 g[2];
[numthreads(2, 1, 1)]
void CSMain(uint3 Tid: SV_GroupThreadId) {
g[1][1] = 0;
}
```
```llvm
@g.scalarized.1dim = local_unnamed_addr addrspace(3) global [4 x i32] zeroinitializer, align 8
; Function Attrs: noinline nounwind memory(write, argmem: none, inaccessiblemem: none)
define void @CSMain() local_unnamed_addr #0 {
#dbg_value(<3 x i32> poison, !29, !DIExpression(DW_OP_LLVM_fragment, 0, 96), !39)
store i32 0, ptr addrspace(3) @g.scalarized.1dim, align 4, !dbg !40
ret void
}
```
This is potentially the cause of some cases of #140417
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