Add an artificial line-0 debug location when the compiler emits a call to

__stack_chk_fail(). This avoids a compiler crash.

Differential Revision: http://reviews.llvm.org/D21818



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274263 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/StackProtector.cpp

@@ -24,6 +24,7 @@
 #include "llvm/IR/Attributes.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalValue.h"
@@ -447,6 +448,7 @@ BasicBlock *StackProtector::CreateFailBB() {
   LLVMContext &Context = F->getContext();
   BasicBlock *FailBB = BasicBlock::Create(Context, "CallStackCheckFailBlk", F);
   IRBuilder<> B(FailBB);
+  B.SetCurrentDebugLocation(DebugLoc::get(0, 0, F->getSubprogram()));
   if (Trip.isOSOpenBSD()) {
     Constant *StackChkFail =
         M->getOrInsertFunction("__stack_smash_handler",