[llvm] [AMDGPU] Handle lowering addrspace casts from LDS to FLAT address in amdgpu-sw-lower-lds. (PR #121214)

[Matt Arsenault via llvm-commits]

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@@ -722,6 +726,16 @@ void AMDGPUSwLowerLDS::translateLDSMemoryOperationsToGlobalMemory(
       AsanInfo.Instructions.insert(NewXCHG);
       XCHG->replaceAllUsesWith(NewXCHG);
       XCHG->eraseFromParent();
+    } else if (AddrSpaceCastInst *AscI = dyn_cast<AddrSpaceCastInst>(Inst)) {
+      Value *AIOperand = AscI->getPointerOperand();
+      Value *Gep =
+          getTranslatedGlobalMemoryGEPOfLDSPointer(LoadMallocPtr, AIOperand);
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arsenm wrote:

This function looks like it will break on vectors of pointers 

https://github.com/llvm/llvm-project/pull/121214