Don't do tail calls in a function that call setjmp. The stack might be

corrupted when setjmp returns again.

llvm-svn: 131399

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/include/llvm/Function.h b/llvm/include/llvm/Function.h
index 9a0825ab4a9..b34a6b25421 100644
--- a/llvm/include/llvm/Function.h
+++ b/llvm/include/llvm/Function.h
@@ -414,6 +414,10 @@ public:
   ///
   bool hasAddressTaken(const User** = 0) const;
 
+  /// callsFunctionThatReturnsTwice - Return true if the function has a call to
+  /// setjmp or other function that gcc recognizes as "returning twice".
+  bool callsFunctionThatReturnsTwice() const;
+
 private:
   // Shadow Value::setValueSubclassData with a private forwarding method so that
   // subclasses cannot accidentally use it.