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Move common code into an MRI function.

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llvm-svn: 147071
This commit is contained in:
Jakob Stoklund Olesen 2011-12-21 19:50:05 +00:00
parent f7236d1084
commit 893037ce23
4 changed files with 16 additions and 25 deletions
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11
include/llvm/CodeGen/MachineRegisterInfo.h
View File

@ -283,7 +283,16 @@ public:
/// isPhysRegUsed - Return true if the specified register is used in this
/// function. This only works after register allocation.
bool isPhysRegUsed(unsigned Reg) const { return UsedPhysRegs[Reg]; }
/// isPhysRegOrOverlapUsed - Return true if Reg or any overlapping register
/// is used in this function.
bool isPhysRegOrOverlapUsed(unsigned Reg) const {
for (const unsigned *AI = TRI->getOverlaps(Reg); *AI; ++AI)
if (isPhysRegUsed(*AI))
return true;
return false;
}
/// setPhysRegUsed - Mark the specified register used in this function.
/// This should only be called during and after register allocation.
void setPhysRegUsed(unsigned Reg) { UsedPhysRegs[Reg] = true; }

9
lib/CodeGen/ExecutionDepsFix.cpp
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@ -654,11 +654,10 @@ bool ExeDepsFix::runOnMachineFunction(MachineFunction &mf) {
bool anyregs = false;
for (TargetRegisterClass::const_iterator I = RC->begin(), E = RC->end();
I != E; ++I)
for (const unsigned *AI = TRI->getOverlaps(*I); *AI; ++AI)
if (MF->getRegInfo().isPhysRegUsed(*AI)) {
anyregs = true;
break;
}
if (MF->getRegInfo().isPhysRegOrOverlapUsed(*I)) {
anyregs = true;
break;
}
if (!anyregs) return false;
// Initialize the AliasMap on the first use.

10
lib/CodeGen/PrologEpilogInserter.cpp
View File

@ -224,17 +224,9 @@ void PEI::calculateCalleeSavedRegisters(MachineFunction &Fn) {
std::vector<CalleeSavedInfo> CSI;
for (unsigned i = 0; CSRegs[i]; ++i) {
unsigned Reg = CSRegs[i];
if (Fn.getRegInfo().isPhysRegUsed(Reg)) {
if (Fn.getRegInfo().isPhysRegOrOverlapUsed(Reg)) {
// If the reg is modified, save it!
CSI.push_back(CalleeSavedInfo(Reg));
} else {
for (const unsigned *AliasSet = RegInfo->getAliasSet(Reg);
*AliasSet; ++AliasSet) { // Check alias registers too.
if (Fn.getRegInfo().isPhysRegUsed(*AliasSet)) {
CSI.push_back(CalleeSavedInfo(Reg));
break;
}
}
}
}

11
lib/Target/ARM/ARMFrameLowering.cpp
View File

@ -898,18 +898,9 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
for (unsigned i = 0; CSRegs[i]; ++i) {
unsigned Reg = CSRegs[i];
bool Spilled = false;
if (MF.getRegInfo().isPhysRegUsed(Reg)) {
if (MF.getRegInfo().isPhysRegOrOverlapUsed(Reg)) {
Spilled = true;
CanEliminateFrame = false;
} else {
// Check alias registers too.
for (const unsigned *Aliases =
RegInfo->getAliasSet(Reg); *Aliases; ++Aliases) {
if (MF.getRegInfo().isPhysRegUsed(*Aliases)) {
Spilled = true;
CanEliminateFrame = false;
}
}
}
if (!ARM::GPRRegisterClass->contains(Reg))