[llvm] [AMDGPU][PromoteAlloca] Correctly handle a variable vector index (PR #83597)

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git-clang-format --diff 92fe6c61f900d6479f7ab708784c9e62d7523768 bc3871f70d552718ee7157f79c3fdb01842e7803 -- llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
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View the diff from clang-format here.
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diff --git a/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp b/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
index ebd48f4082..c87c34731f 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
@@ -457,7 +457,8 @@ static Value *promoteAllocaUserToVector(
     // We're storing the full vector, we can handle this without knowing CurVal.
     Type *AccessTy = Val->getType();
     TypeSize AccessSize = DL.getTypeStoreSize(AccessTy);
-    if (AccessSize == VecStoreSize && isa<Constant>(Index) && cast<Constant>(Index)->isZeroValue()) {
+    if (AccessSize == VecStoreSize && isa<Constant>(Index) &&
+        cast<Constant>(Index)->isZeroValue()) {
       if (AccessTy->isPtrOrPtrVectorTy())
         Val = CreateTempPtrIntCast(Val, AccessTy);
       else if (VectorTy->isPtrOrPtrVectorTy())

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https://github.com/llvm/llvm-project/pull/83597