Initialize variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127038 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsFrameLowering.cpp b/lib/Target/Mips/MipsFrameLowering.cpp
index bf37032..3e832cf 100644
--- a/lib/Target/Mips/MipsFrameLowering.cpp
+++ b/lib/Target/Mips/MipsFrameLowering.cpp
@@ -338,7 +338,7 @@
 
   unsigned NewReg = 0;
   int NewImm = 0;
-  bool ATUsed;
+  bool ATUsed = false;
 
   // if framepointer enabled, restore it and restore the
   // stack pointer