279 lines
9.3 KiB
C++
279 lines
9.3 KiB
C++
//===- BlackfinInstrInfo.cpp - Blackfin Instruction Information -*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the Blackfin implementation of the TargetInstrInfo class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "BlackfinInstrInfo.h"
|
|
#include "BlackfinSubtarget.h"
|
|
#include "Blackfin.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/CodeGen/MachineRegisterInfo.h"
|
|
#include "llvm/CodeGen/MachineInstrBuilder.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "BlackfinGenInstrInfo.inc"
|
|
|
|
using namespace llvm;
|
|
|
|
BlackfinInstrInfo::BlackfinInstrInfo(BlackfinSubtarget &ST)
|
|
: TargetInstrInfoImpl(BlackfinInsts, array_lengthof(BlackfinInsts)),
|
|
RI(ST, *this),
|
|
Subtarget(ST) {}
|
|
|
|
/// Return true if the instruction is a register to register move and
|
|
/// leave the source and dest operands in the passed parameters.
|
|
bool BlackfinInstrInfo::isMoveInstr(const MachineInstr &MI,
|
|
unsigned &SrcReg,
|
|
unsigned &DstReg,
|
|
unsigned &SrcSR,
|
|
unsigned &DstSR) const {
|
|
SrcSR = DstSR = 0; // No sub-registers.
|
|
switch (MI.getOpcode()) {
|
|
case BF::MOVE:
|
|
case BF::MOVE_ncccc:
|
|
case BF::MOVE_ccncc:
|
|
case BF::MOVECC_zext:
|
|
case BF::MOVECC_nz:
|
|
DstReg = MI.getOperand(0).getReg();
|
|
SrcReg = MI.getOperand(1).getReg();
|
|
return true;
|
|
case BF::SLL16i:
|
|
if (MI.getOperand(2).getImm()!=0)
|
|
return false;
|
|
DstReg = MI.getOperand(0).getReg();
|
|
SrcReg = MI.getOperand(1).getReg();
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// isLoadFromStackSlot - If the specified machine instruction is a direct
|
|
/// load from a stack slot, return the virtual or physical register number of
|
|
/// the destination along with the FrameIndex of the loaded stack slot. If
|
|
/// not, return 0. This predicate must return 0 if the instruction has
|
|
/// any side effects other than loading from the stack slot.
|
|
unsigned BlackfinInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
|
|
int &FrameIndex) const {
|
|
switch (MI->getOpcode()) {
|
|
default: break;
|
|
case BF::LOAD32fi:
|
|
case BF::LOAD16fi:
|
|
if (MI->getOperand(1).isFI() &&
|
|
MI->getOperand(2).isImm() &&
|
|
MI->getOperand(2).getImm() == 0) {
|
|
FrameIndex = MI->getOperand(1).getIndex();
|
|
return MI->getOperand(0).getReg();
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/// isStoreToStackSlot - If the specified machine instruction is a direct
|
|
/// store to a stack slot, return the virtual or physical register number of
|
|
/// the source reg along with the FrameIndex of the loaded stack slot. If
|
|
/// not, return 0. This predicate must return 0 if the instruction has
|
|
/// any side effects other than storing to the stack slot.
|
|
unsigned BlackfinInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
|
|
int &FrameIndex) const {
|
|
switch (MI->getOpcode()) {
|
|
default: break;
|
|
case BF::STORE32fi:
|
|
case BF::STORE16fi:
|
|
if (MI->getOperand(1).isFI() &&
|
|
MI->getOperand(2).isImm() &&
|
|
MI->getOperand(2).getImm() == 0) {
|
|
FrameIndex = MI->getOperand(1).getIndex();
|
|
return MI->getOperand(0).getReg();
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
unsigned BlackfinInstrInfo::
|
|
InsertBranch(MachineBasicBlock &MBB,
|
|
MachineBasicBlock *TBB,
|
|
MachineBasicBlock *FBB,
|
|
const SmallVectorImpl<MachineOperand> &Cond) const {
|
|
// FIXME this should probably have a DebugLoc operand
|
|
DebugLoc DL;
|
|
|
|
// Shouldn't be a fall through.
|
|
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
|
|
assert((Cond.size() == 1 || Cond.size() == 0) &&
|
|
"Branch conditions have one component!");
|
|
|
|
if (Cond.empty()) {
|
|
// Unconditional branch?
|
|
assert(!FBB && "Unconditional branch with multiple successors!");
|
|
BuildMI(&MBB, DL, get(BF::JUMPa)).addMBB(TBB);
|
|
return 1;
|
|
}
|
|
|
|
// Conditional branch.
|
|
llvm_unreachable("Implement conditional branches!");
|
|
}
|
|
|
|
static bool inClass(const TargetRegisterClass &Test,
|
|
unsigned Reg,
|
|
const TargetRegisterClass *RC) {
|
|
if (TargetRegisterInfo::isPhysicalRegister(Reg))
|
|
return Test.contains(Reg);
|
|
else
|
|
return &Test==RC || Test.hasSubClass(RC);
|
|
}
|
|
|
|
bool BlackfinInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned DestReg,
|
|
unsigned SrcReg,
|
|
const TargetRegisterClass *DestRC,
|
|
const TargetRegisterClass *SrcRC) const {
|
|
DebugLoc DL;
|
|
|
|
if (inClass(BF::ALLRegClass, DestReg, DestRC) &&
|
|
inClass(BF::ALLRegClass, SrcReg, SrcRC)) {
|
|
BuildMI(MBB, I, DL, get(BF::MOVE), DestReg).addReg(SrcReg);
|
|
return true;
|
|
}
|
|
|
|
if (inClass(BF::D16RegClass, DestReg, DestRC) &&
|
|
inClass(BF::D16RegClass, SrcReg, SrcRC)) {
|
|
BuildMI(MBB, I, DL, get(BF::SLL16i), DestReg).addReg(SrcReg).addImm(0);
|
|
return true;
|
|
}
|
|
|
|
if (inClass(BF::AnyCCRegClass, SrcReg, SrcRC) &&
|
|
inClass(BF::DRegClass, DestReg, DestRC)) {
|
|
if (inClass(BF::NotCCRegClass, SrcReg, SrcRC)) {
|
|
BuildMI(MBB, I, DL, get(BF::MOVENCC_z), DestReg).addReg(SrcReg);
|
|
BuildMI(MBB, I, DL, get(BF::BITTGL), DestReg).addReg(DestReg).addImm(0);
|
|
} else {
|
|
BuildMI(MBB, I, DL, get(BF::MOVECC_zext), DestReg).addReg(SrcReg);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (inClass(BF::AnyCCRegClass, DestReg, DestRC) &&
|
|
inClass(BF::DRegClass, SrcReg, SrcRC)) {
|
|
if (inClass(BF::NotCCRegClass, DestReg, DestRC))
|
|
BuildMI(MBB, I, DL, get(BF::SETEQri_not), DestReg).addReg(SrcReg);
|
|
else
|
|
BuildMI(MBB, I, DL, get(BF::MOVECC_nz), DestReg).addReg(SrcReg);
|
|
return true;
|
|
}
|
|
|
|
if (inClass(BF::NotCCRegClass, DestReg, DestRC) &&
|
|
inClass(BF::JustCCRegClass, SrcReg, SrcRC)) {
|
|
BuildMI(MBB, I, DL, get(BF::MOVE_ncccc), DestReg).addReg(SrcReg);
|
|
return true;
|
|
}
|
|
|
|
if (inClass(BF::JustCCRegClass, DestReg, DestRC) &&
|
|
inClass(BF::NotCCRegClass, SrcReg, SrcRC)) {
|
|
BuildMI(MBB, I, DL, get(BF::MOVE_ccncc), DestReg).addReg(SrcReg);
|
|
return true;
|
|
}
|
|
|
|
llvm_unreachable((std::string("Bad regclasses for reg-to-reg copy: ")+
|
|
SrcRC->getName() + " -> " + DestRC->getName()).c_str());
|
|
return false;
|
|
}
|
|
|
|
void
|
|
BlackfinInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned SrcReg,
|
|
bool isKill,
|
|
int FI,
|
|
const TargetRegisterClass *RC) const {
|
|
DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
|
|
|
|
if (inClass(BF::DPRegClass, SrcReg, RC)) {
|
|
BuildMI(MBB, I, DL, get(BF::STORE32fi))
|
|
.addReg(SrcReg, getKillRegState(isKill))
|
|
.addFrameIndex(FI)
|
|
.addImm(0);
|
|
return;
|
|
}
|
|
|
|
if (inClass(BF::D16RegClass, SrcReg, RC)) {
|
|
BuildMI(MBB, I, DL, get(BF::STORE16fi))
|
|
.addReg(SrcReg, getKillRegState(isKill))
|
|
.addFrameIndex(FI)
|
|
.addImm(0);
|
|
return;
|
|
}
|
|
|
|
if (inClass(BF::AnyCCRegClass, SrcReg, RC)) {
|
|
BuildMI(MBB, I, DL, get(BF::STORE8fi))
|
|
.addReg(SrcReg, getKillRegState(isKill))
|
|
.addFrameIndex(FI)
|
|
.addImm(0);
|
|
return;
|
|
}
|
|
|
|
llvm_unreachable((std::string("Cannot store regclass to stack slot: ")+
|
|
RC->getName()).c_str());
|
|
}
|
|
|
|
void BlackfinInstrInfo::
|
|
storeRegToAddr(MachineFunction &MF,
|
|
unsigned SrcReg,
|
|
bool isKill,
|
|
SmallVectorImpl<MachineOperand> &Addr,
|
|
const TargetRegisterClass *RC,
|
|
SmallVectorImpl<MachineInstr*> &NewMIs) const {
|
|
llvm_unreachable("storeRegToAddr not implemented");
|
|
}
|
|
|
|
void
|
|
BlackfinInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned DestReg,
|
|
int FI,
|
|
const TargetRegisterClass *RC) const {
|
|
DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
|
|
if (inClass(BF::DPRegClass, DestReg, RC)) {
|
|
BuildMI(MBB, I, DL, get(BF::LOAD32fi), DestReg)
|
|
.addFrameIndex(FI)
|
|
.addImm(0);
|
|
return;
|
|
}
|
|
|
|
if (inClass(BF::D16RegClass, DestReg, RC)) {
|
|
BuildMI(MBB, I, DL, get(BF::LOAD16fi), DestReg)
|
|
.addFrameIndex(FI)
|
|
.addImm(0);
|
|
return;
|
|
}
|
|
|
|
if (inClass(BF::AnyCCRegClass, DestReg, RC)) {
|
|
BuildMI(MBB, I, DL, get(BF::LOAD8fi), DestReg)
|
|
.addFrameIndex(FI)
|
|
.addImm(0);
|
|
return;
|
|
}
|
|
|
|
llvm_unreachable("Cannot load regclass from stack slot");
|
|
}
|
|
|
|
void BlackfinInstrInfo::
|
|
loadRegFromAddr(MachineFunction &MF,
|
|
unsigned DestReg,
|
|
SmallVectorImpl<MachineOperand> &Addr,
|
|
const TargetRegisterClass *RC,
|
|
SmallVectorImpl<MachineInstr*> &NewMIs) const {
|
|
llvm_unreachable("loadRegFromAddr not implemented");
|
|
}
|