[llvm-branch-commits] [llvm] AMDGPU/PromoteAlloca: Always use i32 for indexing (PR #170511)

[Matt Arsenault via llvm-branch-commits]

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@@ -461,22 +461,23 @@ static Value *GEPToVectorIndex(GetElementPtrInst *GEP, AllocaInst *Alloca,
     return nullptr;
 
   Value *Offset = VarOffset.first;
-  auto *OffsetType = dyn_cast<IntegerType>(Offset->getType());
-  if (!OffsetType)
+  if (!isa<IntegerType>(Offset->getType()))
     return nullptr;
 
+  Offset = Builder.CreateSExtOrTrunc(Offset, Builder.getIntNTy(BW));
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arsenm wrote:

Why is this using signed anything? The indexes should be treated as unsigned? 

https://github.com/llvm/llvm-project/pull/170511