[llvm] [NVPTX] Check Before inserting AddrSpaceCastInst in NVPTXLoweringAlloca (PR #106127)

[Artem Belevich via llvm-commits]

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@@ -17,7 +17,22 @@ define void @kernel() {
   ret void
 }
 
+define void @alloca_in_explicit_local_as() {
+; LABEL: @lower_alloca_addrspace5
+; PTX-LABEL: .visible .func alloca_in_explicit_local_as(
+  %A = alloca i32, addrspace(5)
+; CHECK-NOT: addrspacecast ptr %A to ptr addrspace(5)
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Artem-B wrote:

I'd prefer to see a positive check here matching what we *do* want to see.
Negative checks are rather fragile. E.g. an unintentional typo in what we match will makes them always succeed.

https://github.com/llvm/llvm-project/pull/106127