[clang] [llvm] [openmp] [PGO][OpenMP] Instrumentation for GPU devices (PR #76587)

[Johannes Doerfert via cfe-commits]

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@@ -2067,6 +2067,10 @@ Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
 
 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
                                          bool OnlyIfReduced) {
+  // Skip cast if types are identical
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jdoerfert wrote:

@arsenm Wanted to use this one, which requires us to allow no-op casts.
The non-leaf wrappers accept no-op casts, the leaf ones do not. It is unclear if there is a deeper meaning to it, I doubt it.
We probably want to modify them all, in a prep PR, or use the combined interface as before.
@arsenm wdyt?

https://github.com/llvm/llvm-project/pull/76587