Make dense maps keyed on physical registers smallerusing

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

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

llvm-svn: 11477

llvm/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;
 

llvm/lib/CodeGen/PrologEpilogInserter.cpp

@@ -98,7 +98,7 @@ void PEI::saveCallerSavedRegisters(MachineFunction &Fn) {
     return;
 
   // This bitset contains an entry for each physical register for the target...
-  std::vector<bool> ModifiedRegs(MRegisterInfo::FirstVirtualRegister);
+  std::vector<bool> ModifiedRegs(RegInfo->getNumRegs());
   unsigned MaxCallFrameSize = 0;
   bool HasCalls = false;
 

llvm/lib/CodeGen/RegAllocLocal.cpp

@@ -53,7 +53,7 @@ namespace {
     std::vector<unsigned> Virt2PhysRegMap;
 
     unsigned &getVirt2PhysRegMapSlot(unsigned VirtReg) {
-      assert(VirtReg >= MRegisterInfo::FirstVirtualRegister &&"Illegal VREG #");
+      assert(MRegisterInfo::isVirtualRegister(VirtReg) &&"Illegal VREG #");
       assert(VirtReg-MRegisterInfo::FirstVirtualRegister <Virt2PhysRegMap.size()
              && "VirtReg not in map!");
       return Virt2PhysRegMap[VirtReg-MRegisterInfo::FirstVirtualRegister];

llvm/lib/CodeGen/RegAllocSimple.cpp

@@ -154,7 +154,7 @@ void RegAllocSimple::AllocateBasicBlock(MachineBasicBlock &MBB) {
     // Made to combat the incorrect allocation of r2 = add r1, r1
     std::map<unsigned, unsigned> Virt2PhysRegMap;
 
-    RegsUsed.resize(MRegisterInfo::FirstVirtualRegister);
+    RegsUsed.resize(RegInfo->getNumRegs());
     
     // a preliminary pass that will invalidate any registers that
     // are used by the instruction (including implicit uses)

llvm/lib/Target/X86/PeepholeOptimizer.cpp

@@ -164,7 +164,7 @@ namespace {
     // getDefinition - Return the machine instruction that defines the specified
     // SSA virtual register.
     MachineInstr *getDefinition(unsigned Reg) {
-      assert(Reg >= MRegisterInfo::FirstVirtualRegister &&
+      assert(MRegisterInfo::isVirtualRegister(Reg) &&
              "use-def chains only exist for SSA registers!");
       assert(Reg - MRegisterInfo::FirstVirtualRegister < DefiningInst.size() &&
              "Unknown register number!");

llvm/lib/Target/X86/Printer.cpp

@@ -399,7 +399,7 @@ void Printer::printOp(const MachineOperand &MO,
     }
     // FALLTHROUGH
   case MachineOperand::MO_MachineRegister:
-    if (MO.getReg() < MRegisterInfo::FirstVirtualRegister)
+    if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
       // Bug Workaround: See note in Printer::doInitialization about %.
       O << "%" << RI.get(MO.getReg()).Name;
     else

llvm/lib/Target/X86/X86CodeEmitter.cpp

@@ -329,7 +329,7 @@ static unsigned getX86RegNum(unsigned RegNo) {
   case X86::ST4: case X86::ST5: case X86::ST6: case X86::ST7:
     return RegNo-X86::ST0;
   default:
-    assert(RegNo >= MRegisterInfo::FirstVirtualRegister &&
+    assert(MRegisterInfo::isVirtualRegister(RegNo) &&
            "Unknown physical register!");
     assert(0 && "Register allocator hasn't allocated reg correctly yet!");
     return 0;