Make dense maps keyed on physical registers smallerusing

MRegisterInfo::getNumRegs() instead of
MRegisterInfo::FirstVirtualRegister.

Also use MRegisterInfo::is{Physical,Virtual}Register where
appropriate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11477 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 4 deletions

diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp
index 420cb4443e..0554bae87b 100644
--- a/lib/CodeGen/LiveVariables.cpp
+++ b/lib/CodeGen/LiveVariables.cpp
@@ -187,10 +187,9 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
   // physical register.  This is a purely local property, because all physical
   // register references as presumed dead across basic blocks.
   //
-  MachineInstr *PhysRegInfoA[MRegisterInfo::FirstVirtualRegister];
-  bool          PhysRegUsedA[MRegisterInfo::FirstVirtualRegister];
-  std::fill(PhysRegInfoA, PhysRegInfoA+MRegisterInfo::FirstVirtualRegister,
-	    (MachineInstr*)0);
+  MachineInstr *PhysRegInfoA[RegInfo->getNumRegs()];
+  bool          PhysRegUsedA[RegInfo->getNumRegs()];
+  std::fill(PhysRegInfoA, PhysRegInfoA+RegInfo->getNumRegs(), (MachineInstr*)0);
   PhysRegInfo = PhysRegInfoA;
   PhysRegUsed = PhysRegUsedA;