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Switch most getReservedRegs() clients to the MRI equivalent.

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Using the cached bit vector in MRI avoids comstantly allocating and
recomputing the reserved register bit vector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165983 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-10-15 21:57:41 +00:00
parent e4f273908b
commit fb9ebbf236
12 changed files with 28 additions and 52 deletions
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6
lib/CodeGen/LiveVariables.cpp
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@ -503,8 +503,6 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
MRI = &mf.getRegInfo();
TRI = MF->getTarget().getRegisterInfo();
ReservedRegisters = TRI->getReservedRegs(mf);
unsigned NumRegs = TRI->getNumRegs();
PhysRegDef = new MachineInstr*[NumRegs];
PhysRegUse = new MachineInstr*[NumRegs];
@ -588,7 +586,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
unsigned MOReg = UseRegs[i];
if (TargetRegisterInfo::isVirtualRegister(MOReg))
HandleVirtRegUse(MOReg, MBB, MI);
else if (!ReservedRegisters[MOReg])
else if (!MRI->isReserved(MOReg))
HandlePhysRegUse(MOReg, MI);
}
@ -601,7 +599,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
unsigned MOReg = DefRegs[i];
if (TargetRegisterInfo::isVirtualRegister(MOReg))
HandleVirtRegDef(MOReg, MI);
else if (!ReservedRegisters[MOReg])
else if (!MRI->isReserved(MOReg))
HandlePhysRegDef(MOReg, MI, Defs);
}
UpdatePhysRegDefs(MI, Defs);