Teach dwarf writer to handle complex address expression for .debug_loc entries.
This fixes clang generated blocks' variables' debug info.
Radar 9279956.

llvm-svn: 130373
diff --git a/llvm/test/CodeGen/ARM/2010-08-04-StackVariable.ll b/llvm/test/CodeGen/ARM/2010-08-04-StackVariable.ll
index f077d04..25d38ed 100644
--- a/llvm/test/CodeGen/ARM/2010-08-04-StackVariable.ll
+++ b/llvm/test/CodeGen/ARM/2010-08-04-StackVariable.ll
@@ -1,5 +1,5 @@
-; RUN: llc -O0 -mtriple=arm-apple-darwin < %s | grep DW_OP_fbreg
-; Use DW_OP_fbreg in variable's location expression if the variable is in a stack slot.
+; RUN: llc -O0 -mtriple=arm-apple-darwin < %s | grep DW_OP_breg
+; Use DW_OP_breg in variable's location expression if the variable is in a stack slot.
 
 %struct.SVal = type { i8*, i32 }