Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis

[oota-llvm.git] / lib / Target / TargetRegisterInfo.cpp

diff --git a/lib/Target/TargetRegisterInfo.cpp b/lib/Target/TargetRegisterInfo.cpp
index 6addbab851ef041f41bc1896daf599be1b7c9f60..f2434a6224814e4146f427aa528f1b947e087df3 100644 (file)
--- a/lib/Target/TargetRegisterInfo.cpp
+++ b/lib/Target/TargetRegisterInfo.cpp
@@ -63,7 +63,7 @@ TargetRegisterInfo::getMinimalPhysRegClass(unsigned reg, EVT VT) const {
 /// getAllocatableSetForRC - Toggle the bits that represent allocatable
 /// registers for the specific register class.
 static void getAllocatableSetForRC(const MachineFunction &MF,
-                                   const TargetRegisterClass *RC, BitVector &R){  
+                                   const TargetRegisterClass *RC, BitVector &R){
   for (TargetRegisterClass::iterator I = RC->allocation_order_begin(MF),
          E = RC->allocation_order_end(MF); I != E; ++I)
     R.set(*I);
@@ -82,7 +82,7 @@ BitVector TargetRegisterInfo::getAllocatableSet(const MachineFunction &MF,
 
   // Mask out the reserved registers
   BitVector Reserved = getReservedRegs(MF);
-  Allocatable ^= Reserved & Allocatable;
+  Allocatable &= Reserved.flip();
 
   return Allocatable;
 }