Oop - r150653 + r150654 broke one of my test cases. Backing out for now...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150655 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 9 deletions

diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index 491a22caf0..3031d4588b 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -63,8 +63,6 @@ namespace {
     virtual void releaseMemory() {
       ScopeMap.clear();
       Exps.clear();
-      AllocatableRegs.clear();
-      ReservedRegs.clear();
     }
 
   private:
@@ -78,8 +76,6 @@ namespace {
     ScopedHTType VNT;
     SmallVector<MachineInstr*, 64> Exps;
     unsigned CurrVN;
-    BitVector AllocatableRegs;
-    BitVector ReservedRegs;
 
     bool PerformTrivialCoalescing(MachineInstr *MI, MachineBasicBlock *MBB);
     bool isPhysDefTriviallyDead(unsigned Reg,
@@ -240,9 +236,9 @@ bool MachineCSE::PhysRegDefsReach(MachineInstr *CSMI, MachineInstr *MI,
       return false;
 
     for (unsigned i = 0, e = PhysDefs.size(); i != e; ++i) {
-      if (AllocatableRegs.test(PhysDefs[i]) || ReservedRegs.test(PhysDefs[i]))
-        // Avoid extending live range of physical registers if they are
-        //allocatable or reserved.
+      if (TRI->isInAllocatableClass(PhysDefs[i]))
+        // Avoid extending live range of physical registers unless
+        // they are unallocatable.
         return false;
     }
     CrossMBB = true;
@@ -592,7 +588,5 @@ bool MachineCSE::runOnMachineFunction(MachineFunction &MF) {
   MRI = &MF.getRegInfo();
   AA = &getAnalysis<AliasAnalysis>();
   DT = &getAnalysis<MachineDominatorTree>();
-  AllocatableRegs = TRI->getAllocatableSet(MF);
-  ReservedRegs = TRI->getReservedRegs(MF);
   return PerformCSE(DT->getRootNode());
 }