Pragma: Fix DebugOverflowStack() resulting in endless loop.
Drive-by fix (noticed while working on https://reviews.llvm.org/D32205):
DebugOverflowStack() is supposed to provoke a stack overflow, however
LLVM was smart enough to use the red-zone and fold the load into a tail
jump on x86_64 optimizing this to an endless loop instead of a stack
overflow.
llvm-svn: 301218
diff --git a/clang/lib/Lex/Pragma.cpp b/clang/lib/Lex/Pragma.cpp
index f81eaa3..87e105d 100644
--- a/clang/lib/Lex/Pragma.cpp
+++ b/clang/lib/Lex/Pragma.cpp
@@ -989,9 +989,9 @@
#ifdef _MSC_VER
#pragma warning(disable : 4717)
#endif
- static void DebugOverflowStack() {
- void (*volatile Self)() = DebugOverflowStack;
- Self();
+ static void DebugOverflowStack(void (*P)() = nullptr) {
+ void (*volatile Self)(void(*P)()) = DebugOverflowStack;
+ Self(reinterpret_cast<void(*)()>(Self));
}
#ifdef _MSC_VER
#pragma warning(default : 4717)