[clang] [llvm] [AMDGPU] Infer amdgpu-no-flat-scratch-init attribute in AMDGPUAttributor (PR #94647)

[Matt Arsenault via llvm-commits]

================
@@ -434,6 +434,15 @@ struct AAAMDAttributesFunction : public AAAMDAttributes {
       indicatePessimisticFixpoint();
       return;
     }
+
+    for (Instruction &I : instructions(F)) {
+      if (isa<AddrSpaceCastInst>(I) &&
----------------
arsenm wrote:

Simple example, where the cast is still directly the operand. It could be further nested inside another constant expression 

https://github.com/llvm/llvm-project/pull/94647