[llvm] [AMDGPU] Quit PromoteAllocaToVector if intrinsic is used (PR #68744)

[Matt Arsenault via llvm-commits]

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@@ -772,6 +772,8 @@ bool AMDGPUPromoteAllocaImpl::tryPromoteAllocaToVector(AllocaInst &Alloca) {
 
     // Ignore assume-like intrinsics and comparisons used in assumes.
     if (isAssumeLikeIntrinsic(Inst)) {
+      if (!Inst->use_empty())
+        return RejectUser(Inst, "assume-like intrinsic cannot have any users");
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arsenm wrote:

objectsize doesn't need to be rejected, the object size doesn't change after promotion 

https://github.com/llvm/llvm-project/pull/68744