From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 24 May 2011 03:20:56 +0000 (+0000)
Subject: Work around code generation bug in Visual Studio 2010.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dfa178bc2a21667aab745ba9a182cd3e702fec3b;p=oota-llvm.git

Work around code generation bug in Visual Studio 2010.

See http://llvm.org/pr9976 for details.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131954 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Target/TargetRegisterInfo.h b/include/llvm/Target/TargetRegisterInfo.h
index 205e76f9c6f..afa395f3d73 100644
--- a/include/llvm/Target/TargetRegisterInfo.h
+++ b/include/llvm/Target/TargetRegisterInfo.h
@@ -351,13 +351,13 @@ public:
   /// The first virtual register in a function will get the index 0.
   static unsigned virtReg2Index(unsigned Reg) {
     assert(isVirtualRegister(Reg) && "Not a virtual register");
-    return Reg - (1u << 31);
+    return Reg & ~(1u << 31);
   }
 
   /// index2VirtReg - Convert a 0-based index to a virtual register number.
   /// This is the inverse operation of VirtReg2IndexFunctor below.
   static unsigned index2VirtReg(unsigned Index) {
-    return Index + (1u << 31);
+    return Index | (1u << 31);
   }
 
   /// getMinimalPhysRegClass - Returns the Register Class of a physical