Transfer regmasks to MRI.

MRI keeps track of which physregs have been used. Make sure it gets
updated with all the regmask-clobbered registers.

Delete the closePhysRegsUsed() function which isn't necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150830 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 10 deletions

diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp
index 6ec55247bf..08bf1ae910 100644
--- a/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/lib/CodeGen/MachineRegisterInfo.cpp
@@ -22,7 +22,8 @@ MachineRegisterInfo::MachineRegisterInfo(const TargetRegisterInfo &TRI)
   VRegInfo.reserve(256);
   RegAllocHints.reserve(256);
   UsedPhysRegs.resize(TRI.getNumRegs());
-  
+  UsedPhysRegMask.resize(TRI.getNumRegs());
+
   // Create the physreg use/def lists.
   PhysRegUseDefLists = new MachineOperand*[TRI.getNumRegs()];
   memset(PhysRegUseDefLists, 0, sizeof(MachineOperand*)*TRI.getNumRegs());
@@ -244,15 +245,6 @@ MachineRegisterInfo::EmitLiveInCopies(MachineBasicBlock *EntryMBB,
     }
 }
 
-void MachineRegisterInfo::closePhysRegsUsed(const TargetRegisterInfo &TRI) {
-  for (int i = UsedPhysRegs.find_first(); i >= 0;
-       i = UsedPhysRegs.find_next(i))
-         for (const unsigned *SS = TRI.getSubRegisters(i);
-              unsigned SubReg = *SS; ++SS)
-           if (SubReg > unsigned(i))
-             UsedPhysRegs.set(SubReg);
-}
-
 #ifndef NDEBUG
 void MachineRegisterInfo::dumpUses(unsigned Reg) const {
   for (use_iterator I = use_begin(Reg), E = use_end(); I != E; ++I)