[llvm-branch-commits] [llvm] [AMDGPU][UnifyDivergentExitNodes][StructurizeCFG] Add support for callbr instruction with inline-asm (PR #152161)

[Sameer Sahasrabuddhe via llvm-branch-commits]

================
@@ -222,46 +260,27 @@ bool AMDGPUUnifyDivergentExitNodesImpl::run(Function &F, DominatorTree *DT,
       if (HasDivergentExitBlock)
         UnreachableBlocks.push_back(BB);
     } else if (BranchInst *BI = dyn_cast<BranchInst>(BB->getTerminator())) {
-
-      ConstantInt *BoolTrue = ConstantInt::getTrue(F.getContext());
-      if (DummyReturnBB == nullptr) {
-        DummyReturnBB = BasicBlock::Create(F.getContext(),
-                                           "DummyReturnBlock", &F);
-        Type *RetTy = F.getReturnType();
-        Value *RetVal = RetTy->isVoidTy() ? nullptr : PoisonValue::get(RetTy);
-        ReturnInst::Create(F.getContext(), RetVal, DummyReturnBB);
-        ReturningBlocks.push_back(DummyReturnBB);
-      }
+      if (DummyReturnBB == nullptr)
----------------
ssahasra wrote:

```suggestion
      if (!DummyReturnBB)
```

https://github.com/llvm/llvm-project/pull/152161