From 07538ad975994123317fe5b32daed4bf28683a1d Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Thu, 15 Jul 2010 18:45:27 +0000
Subject: [PATCH] Fix crash reported in PR7653.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108441 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/TargetLowering.cpp |  2 +-
 test/CodeGen/X86/2010-07-15-Crash.ll        | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 test/CodeGen/X86/2010-07-15-Crash.ll

diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 4f3866956ca..fb3f7c07d0c 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -2476,7 +2476,7 @@ void TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
         int64_t Offs = GA->getOffset();
         if (C) Offs += C->getZExtValue();
         Ops.push_back(DAG.getTargetGlobalAddress(GA->getGlobal(), 
-                                                 C->getDebugLoc(),
+                                                 C ? C->getDebugLoc() : DebugLoc(),
                                                  Op.getValueType(), Offs));
         return;
       }
diff --git a/test/CodeGen/X86/2010-07-15-Crash.ll b/test/CodeGen/X86/2010-07-15-Crash.ll
new file mode 100644
index 00000000000..3ac4cf5964c
--- /dev/null
+++ b/test/CodeGen/X86/2010-07-15-Crash.ll
@@ -0,0 +1,12 @@
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu < %s -o /dev/null
+; PR7653
+
+@__FUNCTION__.1623 = external constant [4 x i8]   ; <[4 x i8]*> [#uses=1]
+
+define void @foo() nounwind {
+entry:
+  tail call void asm sideeffect "", "s,i,~{fpsr},~{flags}"(i8* getelementptr
+inbounds ([4 x i8]* @__FUNCTION__.1623, i64 0, i64 0), i8* getelementptr
+inbounds ([4 x i8]* @__FUNCTION__.1623, i64 0, i64 0)) nounwind
+  ret void
+}