#include "llvm/Support/raw_os_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
using namespace llvm;
// Pin the vtable to this file.
void MachineRegisterInfo::Delegate::anchor() {}
-MachineRegisterInfo::MachineRegisterInfo(const TargetMachine &TM)
- : TM(TM), TheDelegate(nullptr), IsSSA(true), TracksLiveness(true) {
+MachineRegisterInfo::MachineRegisterInfo(const MachineFunction *MF)
+ : MF(MF), TheDelegate(nullptr), IsSSA(true), TracksLiveness(true) {
VRegInfo.reserve(256);
RegAllocHints.reserve(256);
UsedRegUnits.resize(getTargetRegisterInfo()->getNumRegUnits());
UsedPhysRegMask.resize(getTargetRegisterInfo()->getNumRegs());
// Create the physreg use/def lists.
- PhysRegUseDefLists =
- new MachineOperand*[getTargetRegisterInfo()->getNumRegs()];
- memset(PhysRegUseDefLists, 0,
- sizeof(MachineOperand*)*getTargetRegisterInfo()->getNumRegs());
-}
-
-MachineRegisterInfo::~MachineRegisterInfo() {
- delete [] PhysRegUseDefLists;
+ PhysRegUseDefLists.resize(getTargetRegisterInfo()->getNumRegs(), nullptr);
}
/// setRegClass - Set the register class of the specified virtual register.
bool
MachineRegisterInfo::recomputeRegClass(unsigned Reg, const TargetMachine &TM) {
- const TargetInstrInfo *TII = TM.getInstrInfo();
+ const TargetInstrInfo *TII = TM.getSubtargetImpl()->getInstrInfo();
const TargetRegisterClass *OldRC = getRegClass(Reg);
const TargetRegisterClass *NewRC =
getTargetRegisterInfo()->getLargestLegalSuperClass(OldRC);
/// replaceRegWith - Replace all instances of FromReg with ToReg in the
/// machine function. This is like llvm-level X->replaceAllUsesWith(Y),
/// except that it also changes any definitions of the register as well.
+/// If ToReg is a physical register we apply the sub register to obtain the
+/// final/proper physical register.
void MachineRegisterInfo::replaceRegWith(unsigned FromReg, unsigned ToReg) {
assert(FromReg != ToReg && "Cannot replace a reg with itself");
+ const TargetRegisterInfo *TRI = getTargetRegisterInfo();
+
// TODO: This could be more efficient by bulk changing the operands.
for (reg_iterator I = reg_begin(FromReg), E = reg_end(); I != E; ) {
MachineOperand &O = *I;
++I;
- O.setReg(ToReg);
+ if (TargetRegisterInfo::isPhysicalRegister(ToReg)) {
+ O.substPhysReg(ToReg, *TRI);
+ } else {
+ O.setReg(ToReg);
+ }
}
}
-
/// getVRegDef - Return the machine instr that defines the specified virtual
/// register or null if none is found. This assumes that the code is in SSA
/// form, so there should only be one definition.