Reduce malloc thrashing.

llvm-svn: 117572
2010-10-28 18:41:23 +00:00 · 2010-10-28 18:41:23 +00:00 · 851a994a42
parent 505607e4c6
commit 851a994a42
1 changed files with 1 additions and 1 deletions
--- a/llvm/lib/Target/TargetRegisterInfo.cpp
+++ b/llvm/lib/Target/TargetRegisterInfo.cpp
@ -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;
 }