| Issue |
166203
|
| Summary |
[DirectX] Data scalarization pass does not account for struct types
|
| Labels |
backend:DirectX
|
| Assignees |
|
| Reporter |
inbelic
|
Part of the data scalarization is to replace all uses of vectors with arrays.
Currently it will not account for vectors that are within a struct type, as struct types were explicitly ignored to resolve https://github.com/llvm/llvm-project/issues/145408.
This issue is resolved when a vector type embedded in a struct type is also converted to an array for alloca's and global variables.
>From https://godbolt.org/z/bEqsT74nn:
```llvm
%struct.RawStruct8D = type { [8 x <4 x i32> ] }
; CHECK: %struct.RawStruct8D.scalarized = type { [8 x [4 x i32]] }
define void @test_no_transform_of_struct() {
entry:
%outputSizesLocal.i = alloca %struct.RawStruct8D, align 4
%arrayinit.element13.i76 = getelementptr inbounds nuw [1 x %struct.RawStruct8D], ptr %outputSizesLocal.i, i32 0, i32 0
; CHECK: %gep = getelementptr inbounds nuw [8 x [4 x i32] ] ...
%arrayinit.element13.i76.i1 = getelementptr inbounds nuw [8 x <4 x i32>], ptr %arrayinit.element13.i76, i32 0, i32 1
ret void
}
```
This was surfaced during implementation of https://github.com/llvm/llvm-project/pull/166200 and can be used as an example for test-cases.
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