[clang] [llvm] [HLSL] Handle WaveActiveBallot struct return type appropriately (PR #175105)

[Farzon Lotfi via cfe-commits]

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@@ -1,10 +1,12 @@
 ; RUN: opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-compute %s | FileCheck %s
 
-define noundef <4 x i32> @wave_ballot_simple(i1 noundef %p1) {
+%dx.types.fouri32 = type { i32, i32, i32, i32 }
+
+define noundef %dx.types.fouri32 @wave_ballot_simple(i1 noundef %p1) {
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farzonl wrote:

I don't think we ever want to expose `%dx.types.fouri32` outside of local scope of the function. the return should be a vector.

https://github.com/llvm/llvm-project/pull/175105