PR5863: Don't erase unreachable BBs which have an associated cleanup size.

This works around a crash where malloc reused the memory of an erased BB for a
new BB leaving old cleanup information pointing at the new block.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104472 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 589273da43..3e807bdbc7 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -80,7 +80,7 @@ void CodeGenFunction::EmitStmt(const Stmt *S) {
     // explicitly here. This handles the common case of a call to a noreturn
     // function.
     if (llvm::BasicBlock *CurBB = Builder.GetInsertBlock()) {
-      if (CurBB->empty() && CurBB->use_empty()) {
+      if (CurBB->empty() && CurBB->use_empty() && !BlockScopes.count(CurBB)) {
         CurBB->eraseFromParent();
         Builder.ClearInsertionPoint();
       }