#include "ARMSubtarget.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/ADT/BitVector.h"
/// processFunctionBeforeCalleeSavedScan().
bool HasStackFrame;
- /// LRSForceSpilled - True if the LR register has been for spilled to enable
- /// far jump.
- bool LRForceSpilled;
+ /// LRSpilledForFarJump - True if the LR register has been for spilled to
+ /// enable far jump.
+ bool LRSpilledForFarJump;
/// R3IsLiveIn - True if R3 is live in to this function.
/// FIXME: Remove when register scavenger for Thumb is done.
BitVector GPRCS2Frames;
BitVector DPRCSFrames;
+ /// SpilledCSRegs - A BitVector mask of all spilled callee-saved registers.
+ ///
+ BitVector SpilledCSRegs;
+
/// JumpTableUId - Unique id for jumptables.
///
unsigned JumpTableUId;
ARMFunctionInfo() :
isThumb(false),
VarArgsRegSaveSize(0), HasStackFrame(false),
- LRForceSpilled(false), R3IsLiveIn(false),
+ LRSpilledForFarJump(false), R3IsLiveIn(false),
FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
- GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
+ GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
JumpTableUId(0) {}
ARMFunctionInfo(MachineFunction &MF) :
isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()),
VarArgsRegSaveSize(0), HasStackFrame(false),
- LRForceSpilled(false), R3IsLiveIn(false),
+ LRSpilledForFarJump(false), R3IsLiveIn(false),
FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
+ SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()),
JumpTableUId(0) {}
bool isThumbFunction() const { return isThumb; }
bool hasStackFrame() const { return HasStackFrame; }
void setHasStackFrame(bool s) { HasStackFrame = s; }
- bool isLRForceSpilled() const { return LRForceSpilled; }
- void setLRIsForceSpilled(bool s) { LRForceSpilled = s; }
+ bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
+ void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
- bool isR3IsLiveIn() const { return R3IsLiveIn; }
+ // FIXME: Remove when register scavenger for Thumb is done.
+ bool isR3LiveIn() const { return R3IsLiveIn; }
void setR3IsLiveIn(bool l) { R3IsLiveIn = l; }
unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
}
}
+ void setCSRegisterIsSpilled(unsigned Reg) {
+ SpilledCSRegs.set(Reg);
+ }
+
+ bool isCSRegisterSpilled(unsigned Reg) {
+ return SpilledCSRegs[Reg];
+ }
+
+ const BitVector &getSpilledCSRegisters() const {
+ return SpilledCSRegs;
+ }
+
unsigned createJumpTableUId() {
return JumpTableUId++;
}
.addReg(ARM::R2, false, false, true);
TmpReg = ARM::R2;
}
- if (TmpReg == ARM::R3 && AFI->isR3IsLiveIn())
+ if (TmpReg == ARM::R3 && AFI->isR3LiveIn())
BuildMI(MBB, II, TII.get(ARM::tMOVrr), ARM::R12)
.addReg(ARM::R3, false, false, true);
if (Opcode == ARM::tSpill) {
if (ValReg == ARM::R3)
BuildMI(MBB, NII, TII.get(ARM::tMOVrr), ARM::R2)
.addReg(ARM::R12, false, false, true);
- if (TmpReg == ARM::R3 && AFI->isR3IsLiveIn())
+ if (TmpReg == ARM::R3 && AFI->isR3LiveIn())
BuildMI(MBB, NII, TII.get(ARM::tMOVrr), ARM::R3)
.addReg(ARM::R12, false, false, true);
} else
unsigned NumGPRSpills = 0;
SmallVector<unsigned, 4> UnspilledCS1GPRs;
SmallVector<unsigned, 4> UnspilledCS2GPRs;
+ ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
// Don't spill FP if the frame can be eliminated. This is determined
// by scanning the callee-save registers to see if any is used.
unsigned Reg = CSRegs[i];
bool Spilled = false;
if (MF.isPhysRegUsed(Reg)) {
+ AFI->setCSRegisterIsSpilled(Reg);
Spilled = true;
CanEliminateFrame = false;
} else {
}
}
- ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
bool ForceLRSpill = false;
if (!LRSpilled && AFI->isThumbFunction()) {
unsigned FnSize = ARM::GetFunctionSize(MF);
- // Force LR spill if the Thumb function size is > 2048. This enables the
+ // Force LR to be spilled if the Thumb function size is > 2048. This enables
// use of BL to implement far jump. If it turns out that it's not needed
- // the branch fix up path will undo it.
+ // then the branch fix up path will undo it.
if (FnSize >= (1 << 11)) {
CanEliminateFrame = false;
ForceLRSpill = true;
// Spill LR as well so we can fold BX_RET to the registers restore (LDM).
if (!LRSpilled && CS1Spilled) {
MF.changePhyRegUsed(ARM::LR, true);
+ AFI->setCSRegisterIsSpilled(ARM::LR);
NumGPRSpills++;
UnspilledCS1GPRs.erase(std::find(UnspilledCS1GPRs.begin(),
UnspilledCS1GPRs.end(), (unsigned)ARM::LR));
// the integer and double callee save areas.
unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
if (TargetAlign == 8 && (NumGPRSpills & 1)) {
- if (CS1Spilled && !UnspilledCS1GPRs.empty())
- MF.changePhyRegUsed(UnspilledCS1GPRs.front(), true);
- else if (!UnspilledCS2GPRs.empty())
- MF.changePhyRegUsed(UnspilledCS2GPRs.front(), true);
+ if (CS1Spilled && !UnspilledCS1GPRs.empty()) {
+ unsigned Reg = UnspilledCS1GPRs.front();
+ MF.changePhyRegUsed(Reg, true);
+ AFI->setCSRegisterIsSpilled(Reg);
+ } else if (!UnspilledCS2GPRs.empty()) {
+ unsigned Reg = UnspilledCS2GPRs.front();
+ MF.changePhyRegUsed(Reg, true);
+ AFI->setCSRegisterIsSpilled(Reg);
+ }
}
}
if (ForceLRSpill) {
MF.changePhyRegUsed(ARM::LR, true);
- AFI->setLRIsForceSpilled(true);
+ AFI->setCSRegisterIsSpilled(ARM::LR);
+ AFI->setLRIsSpilledForFarJump(true);
}
}