When possible, don't emit the cleanup block. Instead, just move the instructions to the current block.

llvm-svn: 72654

1 files changed, 7 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 1a95e619157..672f6da502b 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -652,7 +652,13 @@ void CodeGenFunction::EmitCleanupBlock()
 {
   CleanupBlockInfo Info = PopCleanupBlock();
   
-  EmitBlock(Info.CleanupBlock);
+  llvm::BasicBlock *CurBB = Builder.GetInsertBlock();
+  if (CurBB && !CurBB->getTerminator() && 
+      Info.CleanupBlock->getNumUses() == 0) {
+    CurBB->getInstList().splice(CurBB->end(), Info.CleanupBlock->getInstList());
+    delete Info.CleanupBlock;
+  } else 
+    EmitBlock(Info.CleanupBlock);
   
   if (Info.SwitchBlock)
     EmitBlock(Info.SwitchBlock);