Use this one little trick to prevent optimizers from removing an

intentional stack overflow.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197849 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index e4059eeb6fc0a63d17084d5be97dff7d8fc4d0c6..b2f047a2fd1bad8df202601a48e84abae427c4c7 100644 (file)
--- a/lib/Lex/Pragma.cpp
+++ b/lib/Lex/Pragma.cpp
@@ -926,8 +926,9 @@ struct PragmaDebugHandler : public PragmaHandler {
 #ifdef _MSC_VER
     #pragma warning(disable : 4717)
 #endif
-  void DebugOverflowStack() {
-    DebugOverflowStack();
+  static void DebugOverflowStack() {
+    void (*volatile Self)() = DebugOverflowStack;
+    Self();
   }
 #ifdef _MSC_VER
     #pragma warning(default : 4717)