--Pos;
}
- TII.copyRegToReg(*MBB, Pos, VirtReg, PhysReg, RC, RC);
- CopyRegMap.insert(std::make_pair(prior(Pos), VirtReg));
+ bool Emitted = TII.copyRegToReg(*MBB, Pos, VirtReg, PhysReg, RC, RC);
+ assert(Emitted && "Unable to issue a live-in copy instruction!\n");
+ (void) Emitted;
+
+CopyRegMap.insert(std::make_pair(prior(Pos), VirtReg));
if (Coalesced) {
if (&*InsertPos == UseMI) ++InsertPos;
MBB->erase(UseMI);
E = MRI.livein_end(); LI != E; ++LI)
if (LI->second) {
const TargetRegisterClass *RC = MRI.getRegClass(LI->second);
- TII.copyRegToReg(*EntryMBB, EntryMBB->begin(),
- LI->second, LI->first, RC, RC);
+ bool Emitted = TII.copyRegToReg(*EntryMBB, EntryMBB->begin(),
+ LI->second, LI->first, RC, RC);
+ assert(Emitted && "Unable to issue a live-in copy instruction!\n");
+ (void) Emitted;
}
}
}
0
};
- if (STI.isThumb()) {
+ if (STI.isThumb1Only()) {
return STI.isTargetDarwin()
? DarwinThumbCalleeSavedRegClasses : ThumbCalleeSavedRegClasses;
}
}
bool ForceLRSpill = false;
- if (!LRSpilled && AFI->isThumbFunction()) {
+ if (!LRSpilled && AFI->isThumb1OnlyFunction()) {
unsigned FnSize = TII.GetFunctionSizeInBytes(MF);
// 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
if (CS1Spilled && !UnspilledCS1GPRs.empty()) {
for (unsigned i = 0, e = UnspilledCS1GPRs.size(); i != e; ++i) {
unsigned Reg = UnspilledCS1GPRs[i];
- // Don't spiil high register if the function is thumb
- if (!AFI->isThumbFunction() ||
+ // Don't spill high register if the function is thumb1
+ if (!AFI->isThumb1OnlyFunction() ||
isARMLowRegister(Reg) || Reg == ARM::LR) {
MF.getRegInfo().setPhysRegUsed(Reg);
AFI->setCSRegisterIsSpilled(Reg);
}
}
} else if (!UnspilledCS2GPRs.empty() &&
- !AFI->isThumbFunction()) {
+ !AFI->isThumb1OnlyFunction()) {
unsigned Reg = UnspilledCS2GPRs.front();
MF.getRegInfo().setPhysRegUsed(Reg);
AFI->setCSRegisterIsSpilled(Reg);
// to materialize a stack offset. If so, either spill one additional
// callee-saved register or reserve a special spill slot to facilitate
// register scavenging.
- if (RS && !ExtraCSSpill && !AFI->isThumbFunction()) {
+ if (RS && !ExtraCSSpill && !AFI->isThumb1OnlyFunction()) {
MachineFrameInfo *MFI = MF.getFrameInfo();
unsigned Size = estimateStackSize(MF, MFI);
unsigned Limit = (1 << 12) - 1;
return ARM::R0;
case ARM::R3:
// FIXME!
- return STI.isThumb() ? 0 : ARM::R2;
+ return STI.isThumb1Only() ? 0 : ARM::R2;
case ARM::R5:
return ARM::R4;
case ARM::R7:
return ARM::R1;
case ARM::R2:
// FIXME!
- return STI.isThumb() ? 0 : ARM::R3;
+ return STI.isThumb1Only() ? 0 : ARM::R3;
case ARM::R4:
return ARM::R5;
case ARM::R6:
unsigned findScratchRegister(RegScavenger *RS, const TargetRegisterClass *RC,
ARMFunctionInfo *AFI) {
unsigned Reg = RS ? RS->FindUnusedReg(RC, true) : (unsigned) ARM::R12;
- assert (!AFI->isThumbFunction());
+ assert (!AFI->isThumb1OnlyFunction());
if (Reg == 0)
// Try a already spilled CS register.
Reg = RS->FindUnusedReg(RC, AFI->getSpilledCSRegisters());
const TargetInstrInfo *TII;
ARMFunctionInfo *AFI;
bool isThumb;
+ bool isThumb1Only;
bool isThumb2;
public:
static char ID;
TII = Fn.getTarget().getInstrInfo();
AFI = Fn.getInfo<ARMFunctionInfo>();
isThumb = AFI->isThumbFunction();
+ isThumb1Only = AFI->isThumb1OnlyFunction();
isThumb2 = AFI->isThumb2Function();
HasFarJump = false;
TLI.getPointerTy());
SDNode *ResNode;
- if (Subtarget->isThumb())
+ if (Subtarget->isThumb1Only())
ResNode = CurDAG->getTargetNode(ARM::tLDRcp, dl, MVT::i32, MVT::Other,
CPIdx, CurDAG->getEntryNode());
else {
// Selects to ADDri FI, 0 which in turn will become ADDri SP, imm.
int FI = cast<FrameIndexSDNode>(N)->getIndex();
SDValue TFI = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy());
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb1Only()) {
return CurDAG->SelectNodeTo(N, ARM::tADDrSPi, MVT::i32, TFI,
CurDAG->getTargetConstant(0, MVT::i32));
} else {
SDValue Ops[] = { TFI, CurDAG->getTargetConstant(0, MVT::i32),
getAL(CurDAG), CurDAG->getRegister(0, MVT::i32),
CurDAG->getRegister(0, MVT::i32) };
- return CurDAG->SelectNodeTo(N, ARM::ADDri, MVT::i32, Ops, 5);
+ return CurDAG->SelectNodeTo(N, (Subtarget->hasThumb2()) ? ARM::t2ADDri : ARM::ADDri,
+ MVT::i32, Ops, 5);
}
}
case ISD::ADD: {
- if (!Subtarget->isThumb())
+ if (!Subtarget->isThumb1Only())
break;
// Select add sp, c to tADDhirr.
SDValue N0 = Op.getOperand(0);
CurDAG->getTargetConstant(ShImm, MVT::i32),
getAL(CurDAG), CurDAG->getRegister(0, MVT::i32),
CurDAG->getRegister(0, MVT::i32) };
- return CurDAG->SelectNodeTo(N, ARM::ADDrs, MVT::i32, Ops, 7);
+ return CurDAG->SelectNodeTo(N, (Subtarget->hasThumb2()) ?
+ ARM::t2ADDrs : ARM::ADDrs, MVT::i32, Ops, 7);
}
if (isPowerOf2_32(RHSV+1)) { // 2^n-1?
SDValue V = Op.getOperand(0);
CurDAG->getTargetConstant(ShImm, MVT::i32),
getAL(CurDAG), CurDAG->getRegister(0, MVT::i32),
CurDAG->getRegister(0, MVT::i32) };
- return CurDAG->SelectNodeTo(N, ARM::RSBrs, MVT::i32, Ops, 7);
+ return CurDAG->SelectNodeTo(N, (Subtarget->hasThumb2()) ?
+ ARM::t2RSBrs : ARM::RSBrs, MVT::i32, Ops, 7);
}
}
break;
setLibcallName(RTLIB::SRL_I128, 0);
setLibcallName(RTLIB::SRA_I128, 0);
- if (Subtarget->isThumb())
+ if (Subtarget->isThumb1Only())
addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
else
addRegisterClass(MVT::i32, ARM::GPRRegisterClass);
- if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb()) {
+ if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
addRegisterClass(MVT::f32, ARM::SPRRegisterClass);
addRegisterClass(MVT::f64, ARM::DPRRegisterClass);
} else {
setOperationAction(ISD::MUL, MVT::i64, Expand);
setOperationAction(ISD::MULHU, MVT::i32, Expand);
- if (!Subtarget->isThumb() && !Subtarget->hasV6Ops())
+ if (!Subtarget->isThumb1Only() && !Subtarget->hasV6Ops())
setOperationAction(ISD::MULHS, MVT::i32, Expand);
}
setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
}
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
- if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb())
+ if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only())
// Turn f64->i64 into FMRRD, i64 -> f64 to FMDRR iff target supports vfp2.
setOperationAction(ISD::BIT_CONVERT, MVT::i64, Custom);
setOperationAction(ISD::FCOS, MVT::f64, Expand);
setOperationAction(ISD::FREM, MVT::f64, Expand);
setOperationAction(ISD::FREM, MVT::f32, Expand);
- if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb()) {
+ if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
}
setOperationAction(ISD::FPOW, MVT::f32, Expand);
// int <-> fp are custom expanded into bit_convert + ARMISD ops.
- if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb()) {
+ if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
// ARM call to a local ARM function is predicable.
isLocalARMFunc = !Subtarget->isThumb() && !isExt;
// tBX takes a register source operand.
- if (isARMFunc && Subtarget->isThumb() && !Subtarget->hasV5TOps()) {
+ if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, ARMPCLabelIndex,
ARMCP::CPStub, 4);
SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
isARMFunc = !Subtarget->isThumb() || isStub;
// tBX takes a register source operand.
const char *Sym = S->getSymbol();
- if (isARMFunc && Subtarget->isThumb() && !Subtarget->hasV5TOps()) {
+ if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(Sym, ARMPCLabelIndex,
ARMCP::CPStub, 4);
SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
// FIXME: handle tail calls differently.
unsigned CallOpc;
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb1Only()) {
if (!Subtarget->hasV5TOps() && (!isDirect || isARMFunc))
CallOpc = ARMISD::CALL_NOLINK;
else
? (isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL)
: ARMISD::CALL_NOLINK;
}
- if (CallOpc == ARMISD::CALL_NOLINK && !Subtarget->isThumb()) {
+ if (CallOpc == ARMISD::CALL_NOLINK && !Subtarget->isThumb1Only()) {
// implicit def LR - LR mustn't be allocated as GRP:$dst of CALL_NOLINK
Chain = DAG.getCopyToReg(Chain, dl, ARM::LR, DAG.getUNDEF(MVT::i32),InFlag);
InFlag = Chain.getValue(1);
ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
TargetRegisterClass *RC;
- if (AFI->isThumbFunction())
+ if (AFI->isThumb1OnlyFunction())
RC = ARM::tGPRRegisterClass;
else
RC = ARM::GPRRegisterClass;
RC = ARM::SPRRegisterClass;
else if (FloatABIType == FloatABI::Hard && RegVT == MVT::f64)
RC = ARM::DPRRegisterClass;
- else if (AFI->isThumbFunction())
+ else if (AFI->isThumb1OnlyFunction())
RC = ARM::tGPRRegisterClass;
else
RC = ARM::GPRRegisterClass;
SmallVector<SDValue, 4> MemOps;
for (; NumGPRs < 4; ++NumGPRs) {
TargetRegisterClass *RC;
- if (AFI->isThumbFunction())
+ if (AFI->isThumb1OnlyFunction())
RC = ARM::tGPRRegisterClass;
else
RC = ARM::GPRRegisterClass;
return false;
}
-static bool isLegalCmpImmediate(unsigned C, bool isThumb) {
- return ( isThumb && (C & ~255U) == 0) ||
- (!isThumb && ARM_AM::getSOImmVal(C) != -1);
+static bool isLegalCmpImmediate(unsigned C, bool isThumb1Only) {
+ return ( isThumb1Only && (C & ~255U) == 0) ||
+ (!isThumb1Only && ARM_AM::getSOImmVal(C) != -1);
}
/// Returns appropriate ARM CMP (cmp) and corresponding condition code for
/// the given operands.
static SDValue getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
- SDValue &ARMCC, SelectionDAG &DAG, bool isThumb,
+ SDValue &ARMCC, SelectionDAG &DAG, bool isThumb1Only,
DebugLoc dl) {
if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
unsigned C = RHSC->getZExtValue();
- if (!isLegalCmpImmediate(C, isThumb)) {
+ if (!isLegalCmpImmediate(C, isThumb1Only)) {
// Constant does not fit, try adjusting it by one?
switch (CC) {
default: break;
case ISD::SETLT:
case ISD::SETGE:
- if (isLegalCmpImmediate(C-1, isThumb)) {
+ if (isLegalCmpImmediate(C-1, isThumb1Only)) {
CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
RHS = DAG.getConstant(C-1, MVT::i32);
}
break;
case ISD::SETULT:
case ISD::SETUGE:
- if (C > 0 && isLegalCmpImmediate(C-1, isThumb)) {
+ if (C > 0 && isLegalCmpImmediate(C-1, isThumb1Only)) {
CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
RHS = DAG.getConstant(C-1, MVT::i32);
}
break;
case ISD::SETLE:
case ISD::SETGT:
- if (isLegalCmpImmediate(C+1, isThumb)) {
+ if (isLegalCmpImmediate(C+1, isThumb1Only)) {
CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
RHS = DAG.getConstant(C+1, MVT::i32);
}
break;
case ISD::SETULE:
case ISD::SETUGT:
- if (C < 0xffffffff && isLegalCmpImmediate(C+1, isThumb)) {
+ if (C < 0xffffffff && isLegalCmpImmediate(C+1, isThumb1Only)) {
CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
RHS = DAG.getConstant(C+1, MVT::i32);
}
if (LHS.getValueType() == MVT::i32) {
SDValue ARMCC;
SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
- SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMCC, DAG, ST->isThumb(), dl);
+ SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMCC, DAG, ST->isThumb1Only(), dl);
return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMCC, CCR,Cmp);
}
if (LHS.getValueType() == MVT::i32) {
SDValue ARMCC;
SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
- SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMCC, DAG, ST->isThumb(), dl);
+ SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMCC, DAG, ST->isThumb1Only(), dl);
return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
Chain, Dest, ARMCC, CCR,Cmp);
}
return SDValue();
// If we are in thumb mode, we don't have RRX.
- if (ST->isThumb()) return SDValue();
+ if (ST->isThumb1Only()) return SDValue();
// Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
if (!VT.isSimple())
return false;
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb()) { // FIXME for thumb2
if (V < 0)
return false;
case 0: // no scale reg, must be "r+i" or "r", or "i".
break;
case 1:
- if (Subtarget->isThumb())
+ if (Subtarget->isThumb()) // FIXME for thumb2
return false;
// FALL THROUGH.
default:
// GCC RS6000 Constraint Letters
switch (Constraint[0]) {
case 'l':
- if (Subtarget->isThumb())
+ if (Subtarget->isThumb1Only())
return std::make_pair(0U, ARM::tGPRRegisterClass);
else
return std::make_pair(0U, ARM::GPRRegisterClass);
switch (Constraint) {
case 'I':
- if (Subtarget->isThumb()) {
- // This must be a constant between 0 and 255, for ADD immediates.
+ if (Subtarget->isThumb1Only()) {
+ // This must be a constant between 0 and 255, for ADD
+ // immediates.
if (CVal >= 0 && CVal <= 255)
break;
+ } else if (Subtarget->isThumb2()) {
+ // A constant that can be used as an immediate value in a
+ // data-processing instruction.
+ if (ARM_AM::getT2SOImmVal(CVal) != -1)
+ break;
} else {
// A constant that can be used as an immediate value in a
// data-processing instruction.
return;
case 'J':
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb()) { // FIXME thumb2
// This must be a constant between -255 and -1, for negated ADD
// immediates. This can be used in GCC with an "n" modifier that
// prints the negated value, for use with SUB instructions. It is
return;
case 'K':
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb1Only()) {
// A 32-bit value where only one byte has a nonzero value. Exclude
// zero to match GCC. This constraint is used by GCC internally for
// constants that can be loaded with a move/shift combination.
// It is not useful otherwise but is implemented for compatibility.
if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
break;
+ } else if (Subtarget->isThumb2()) {
+ // A constant whose bitwise inverse can be used as an immediate
+ // value in a data-processing instruction. This can be used in GCC
+ // with a "B" modifier that prints the inverted value, for use with
+ // BIC and MVN instructions. It is not useful otherwise but is
+ // implemented for compatibility.
+ if (ARM_AM::getT2SOImmVal(~CVal) != -1)
+ break;
} else {
// A constant whose bitwise inverse can be used as an immediate
// value in a data-processing instruction. This can be used in GCC
return;
case 'L':
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb1Only()) {
// This must be a constant between -7 and 7,
// for 3-operand ADD/SUB immediate instructions.
if (CVal >= -7 && CVal < 7)
break;
+ } else if (Subtarget->isThumb2()) {
+ // A constant whose negation can be used as an immediate value in a
+ // data-processing instruction. This can be used in GCC with an "n"
+ // modifier that prints the negated value, for use with SUB
+ // instructions. It is not useful otherwise but is implemented for
+ // compatibility.
+ if (ARM_AM::getT2SOImmVal(-CVal) != -1)
+ break;
} else {
// A constant whose negation can be used as an immediate value in a
// data-processing instruction. This can be used in GCC with an "n"
return;
case 'M':
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb()) { // FIXME thumb2
// This must be a multiple of 4 between 0 and 1020, for
// ADD sp + immediate.
if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
return;
case 'N':
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb()) { // FIXME thumb2
// This must be a constant between 0 and 31, for shift amounts.
if (CVal >= 0 && CVal <= 31)
break;
return;
case 'O':
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb()) { // FIXME thumb2
// This must be a multiple of 4 between -508 and 508, for
// ADD/SUB sp = sp + immediate.
if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
def tADJCALLSTACKUP :
PseudoInst<(outs), (ins i32imm:$amt1, i32imm:$amt2),
"@ tADJCALLSTACKUP $amt1",
- [(ARMcallseq_end imm:$amt1, imm:$amt2)]>, Requires<[IsThumb]>;
+ [(ARMcallseq_end imm:$amt1, imm:$amt2)]>, Requires<[IsThumb1Only]>;
def tADJCALLSTACKDOWN :
PseudoInst<(outs), (ins i32imm:$amt),
"@ tADJCALLSTACKDOWN $amt",
- [(ARMcallseq_start imm:$amt)]>, Requires<[IsThumb]>;
+ [(ARMcallseq_start imm:$amt)]>, Requires<[IsThumb1Only]>;
}
let isNotDuplicable = 1 in
//
let isReturn = 1, isTerminator = 1 in {
- def tBX_RET : TI<(outs), (ins), "bx lr", [(ARMretflag)]>;
+ def tBX_RET : T1I<(outs), (ins), "bx lr", [(ARMretflag)]>;
// Alternative return instruction used by vararg functions.
def tBX_RET_vararg : T1I<(outs), (ins tGPR:$target), "bx $target", []>;
}
def tREV : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"rev $dst, $src",
[(set tGPR:$dst, (bswap tGPR:$src))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
def tREV16 : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"rev16 $dst, $src",
(or (and (shl tGPR:$src, (i32 8)), 0xFF00),
(or (and (srl tGPR:$src, (i32 8)), 0xFF0000),
(and (shl tGPR:$src, (i32 8)), 0xFF000000)))))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
def tREVSH : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"revsh $dst, $src",
(sext_inreg
(or (srl (and tGPR:$src, 0xFFFF), (i32 8)),
(shl tGPR:$src, (i32 8))), i16))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
// rotate right register
let Defs = [CPSR] in
def tSXTB : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"sxtb $dst, $src",
[(set tGPR:$dst, (sext_inreg tGPR:$src, i8))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
// sign-extend short
def tSXTH : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"sxth $dst, $src",
[(set tGPR:$dst, (sext_inreg tGPR:$src, i16))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
// test
let isCommutable = 1, Defs = [CPSR] in
def tUXTB : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"uxtb $dst, $src",
[(set tGPR:$dst, (and tGPR:$src, 0xFF))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
// zero-extend short
def tUXTH : T1I<(outs tGPR:$dst), (ins tGPR:$src),
"uxth $dst, $src",
[(set tGPR:$dst, (and tGPR:$src, 0xFFFF))]>,
- Requires<[IsThumb, HasV6]>;
+ Requires<[IsThumb1Only, HasV6]>;
// Conditional move tMOVCCr - Used to implement the Thumb SELECT_CC DAG operation.
//
let isNotDuplicable = 1 in
-def t2PICADD : T2XI<(outs tGPR:$dst), (ins tGPR:$lhs, pclabel:$cp),
+def t2PICADD : T2XI<(outs GPR:$dst), (ins GPR:$lhs, pclabel:$cp),
"$cp:\n\tadd $dst, pc",
- [(set tGPR:$dst, (ARMpic_add tGPR:$lhs, imm:$cp))]>;
+ [(set GPR:$dst, (ARMpic_add GPR:$lhs, imm:$cp))]>;
// LEApcrel - Load a pc-relative address into a register without offending the
JumpTableUId(0), ConstPoolEntryUId(0) {}
bool isThumbFunction() const { return isThumb; }
+ bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }
bool isThumb2Function() const { return isThumb && hasThumb2; }
unsigned getAlign() const { return Align; }
} else if (inTextSection) {
// An instruction
atInsnStart = false;
- if (Subtarget->isThumb()) {
+ if (Subtarget->isThumb()) { // FIXME thumb2
// BL and BLX <non-reg> are 4 bytes, all others 2.
if (strncmp(Str, "blx", strlen("blx"))==0) {
const char* p = Str+3;
// FIXME
switch (MBB.back().getOpcode()) {
- //case ARM::t2BX_RET:
+ case ARM::t2BX_RET:
// case ARM::LDM_RET:
case ARM::t2B: // Uncond branch.
case ARM::t2BR_JTr: // Jumptable branch.
return false;
}
-
-
-bool Thumb2InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *DestRC,
- const TargetRegisterClass *SrcRC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
- if (DestRC == ARM::GPRRegisterClass) {
- if (SrcRC == ARM::GPRRegisterClass) {
- return ARMBaseInstrInfo::copyRegToReg(MBB, I, DestReg, SrcReg, DestRC, SrcRC);
- } else if (SrcRC == ARM::tGPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVlor2hir), DestReg).addReg(SrcReg);
- return true;
- }
- } else if (DestRC == ARM::tGPRRegisterClass) {
- if (SrcRC == ARM::GPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVhir2lor), DestReg).addReg(SrcReg);
- return true;
- } else if (SrcRC == ARM::tGPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg).addReg(SrcReg);
- return true;
- }
- }
-
- return false;
-}
-
-
-
-
-
-
-bool Thumb2InstrInfo::isMoveInstr(const MachineInstr &MI,
- unsigned &SrcReg, unsigned &DstReg,
- unsigned& SrcSubIdx, unsigned& DstSubIdx) const {
- SrcSubIdx = DstSubIdx = 0; // No sub-registers.
-
- unsigned oc = MI.getOpcode();
- switch (oc) {
- default:
- return false;
- case ARM::tMOVr:
- case ARM::tMOVhir2lor:
- case ARM::tMOVlor2hir:
- case ARM::tMOVhir2hir:
- assert(MI.getDesc().getNumOperands() >= 2 &&
- MI.getOperand(0).isReg() &&
- MI.getOperand(1).isReg() &&
- "Invalid Thumb MOV instruction");
- SrcReg = MI.getOperand(1).getReg();
- DstReg = MI.getOperand(0).getReg();
- return true;
- }
-}
-
-unsigned Thumb2InstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
- int &FrameIndex) const {
- switch (MI->getOpcode()) {
- default: break;
- case ARM::tRestore:
- 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 Thumb2InstrInfo::isStoreToStackSlot(const MachineInstr *MI,
- int &FrameIndex) const {
- switch (MI->getOpcode()) {
- default: break;
- case ARM::tSpill:
- 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;
-}
-
-bool Thumb2InstrInfo::
-canFoldMemoryOperand(const MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops) const {
- if (Ops.size() != 1) return false;
-
- unsigned OpNum = Ops[0];
- unsigned Opc = MI->getOpcode();
- switch (Opc) {
- default: break;
- case ARM::tMOVr:
- case ARM::tMOVlor2hir:
- case ARM::tMOVhir2lor:
- case ARM::tMOVhir2hir: {
- if (OpNum == 0) { // move -> store
- unsigned SrcReg = MI->getOperand(1).getReg();
- if (RI.isPhysicalRegister(SrcReg) && !isARMLowRegister(SrcReg))
- // tSpill cannot take a high register operand.
- return false;
- } else { // move -> load
- unsigned DstReg = MI->getOperand(0).getReg();
- if (RI.isPhysicalRegister(DstReg) && !isARMLowRegister(DstReg))
- // tRestore cannot target a high register operand.
- return false;
- }
- return true;
- }
- }
-
- return false;
-}
-
-void Thumb2InstrInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned SrcReg, bool isKill, int FI,
- const TargetRegisterClass *RC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
- assert(RC == ARM::tGPRRegisterClass && "Unknown regclass!");
-
- if (RC == ARM::tGPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tSpill))
- .addReg(SrcReg, getKillRegState(isKill))
- .addFrameIndex(FI).addImm(0);
- }
-}
-
-void Thumb2InstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
- bool isKill,
- SmallVectorImpl<MachineOperand> &Addr,
- const TargetRegisterClass *RC,
- SmallVectorImpl<MachineInstr*> &NewMIs) const{
- DebugLoc DL = DebugLoc::getUnknownLoc();
- unsigned Opc = 0;
-
- assert(RC == ARM::GPRRegisterClass && "Unknown regclass!");
- if (RC == ARM::GPRRegisterClass) {
- Opc = Addr[0].isFI() ? ARM::tSpill : ARM::tSTR;
- }
-
- MachineInstrBuilder MIB =
- BuildMI(MF, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill));
- for (unsigned i = 0, e = Addr.size(); i != e; ++i)
- MIB.addOperand(Addr[i]);
- NewMIs.push_back(MIB);
- return;
-}
-
-void Thumb2InstrInfo::
-loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned DestReg, int FI,
- const TargetRegisterClass *RC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
- assert(RC == ARM::tGPRRegisterClass && "Unknown regclass!");
-
- if (RC == ARM::tGPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tRestore), DestReg)
- .addFrameIndex(FI).addImm(0);
- }
-}
-
-void Thumb2InstrInfo::
-loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
- SmallVectorImpl<MachineOperand> &Addr,
- const TargetRegisterClass *RC,
- SmallVectorImpl<MachineInstr*> &NewMIs) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- unsigned Opc = 0;
-
- if (RC == ARM::GPRRegisterClass) {
- Opc = Addr[0].isFI() ? ARM::tRestore : ARM::tLDR;
- }
-
- MachineInstrBuilder MIB = BuildMI(MF, DL, get(Opc), DestReg);
- for (unsigned i = 0, e = Addr.size(); i != e; ++i)
- MIB.addOperand(Addr[i]);
- NewMIs.push_back(MIB);
- return;
-}
-
-bool Thumb2InstrInfo::
-spillCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const {
- if (CSI.empty())
- return false;
-
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (MI != MBB.end()) DL = MI->getDebugLoc();
-
- MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, get(ARM::tPUSH));
- for (unsigned i = CSI.size(); i != 0; --i) {
- unsigned Reg = CSI[i-1].getReg();
- // Add the callee-saved register as live-in. It's killed at the spill.
- MBB.addLiveIn(Reg);
- MIB.addReg(Reg, RegState::Kill);
- }
- return true;
-}
-
-bool Thumb2InstrInfo::
-restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const {
- MachineFunction &MF = *MBB.getParent();
- ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
- if (CSI.empty())
- return false;
-
- bool isVarArg = AFI->getVarArgsRegSaveSize() > 0;
- MachineInstr *PopMI = MF.CreateMachineInstr(get(ARM::tPOP),MI->getDebugLoc());
- for (unsigned i = CSI.size(); i != 0; --i) {
- unsigned Reg = CSI[i-1].getReg();
- if (Reg == ARM::LR) {
- // Special epilogue for vararg functions. See emitEpilogue
- if (isVarArg)
- continue;
- Reg = ARM::PC;
- PopMI->setDesc(get(ARM::tPOP_RET));
- MI = MBB.erase(MI);
- }
- PopMI->addOperand(MachineOperand::CreateReg(Reg, true));
- }
-
- // It's illegal to emit pop instruction without operands.
- if (PopMI->getNumOperands() > 0)
- MBB.insert(MI, PopMI);
-
- return true;
-}
-
-MachineInstr *Thumb2InstrInfo::
-foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops, int FI) const {
- if (Ops.size() != 1) return NULL;
-
- unsigned OpNum = Ops[0];
- unsigned Opc = MI->getOpcode();
- MachineInstr *NewMI = NULL;
- switch (Opc) {
- default: break;
- case ARM::tMOVr:
- case ARM::tMOVlor2hir:
- case ARM::tMOVhir2lor:
- case ARM::tMOVhir2hir: {
- if (OpNum == 0) { // move -> store
- unsigned SrcReg = MI->getOperand(1).getReg();
- bool isKill = MI->getOperand(1).isKill();
- if (RI.isPhysicalRegister(SrcReg) && !isARMLowRegister(SrcReg))
- // tSpill cannot take a high register operand.
- break;
- NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::tSpill))
- .addReg(SrcReg, getKillRegState(isKill))
- .addFrameIndex(FI).addImm(0);
- } else { // move -> load
- unsigned DstReg = MI->getOperand(0).getReg();
- if (RI.isPhysicalRegister(DstReg) && !isARMLowRegister(DstReg))
- // tRestore cannot target a high register operand.
- break;
- bool isDead = MI->getOperand(0).isDead();
- NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::tRestore))
- .addReg(DstReg, RegState::Define | getDeadRegState(isDead))
- .addFrameIndex(FI).addImm(0);
- }
- break;
- }
- }
-
- return NewMI;
-}
/// always be able to get register info as well (through this method).
///
const Thumb2RegisterInfo &getRegisterInfo() const { return RI; }
-
- bool copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *DestRC,
- const TargetRegisterClass *SrcRC) const;
-
-
-
-
- bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const;
- bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const;
-
- bool isMoveInstr(const MachineInstr &MI,
- unsigned &SrcReg, unsigned &DstReg,
- unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
- unsigned isLoadFromStackSlot(const MachineInstr *MI,
- int &FrameIndex) const;
- unsigned isStoreToStackSlot(const MachineInstr *MI,
- int &FrameIndex) const;
-
- void storeRegToStackSlot(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MBBI,
- unsigned SrcReg, bool isKill, int FrameIndex,
- const TargetRegisterClass *RC) const;
-
- void storeRegToAddr(MachineFunction &MF, unsigned SrcReg, bool isKill,
- SmallVectorImpl<MachineOperand> &Addr,
- const TargetRegisterClass *RC,
- SmallVectorImpl<MachineInstr*> &NewMIs) const;
-
- void loadRegFromStackSlot(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MBBI,
- unsigned DestReg, int FrameIndex,
- const TargetRegisterClass *RC) const;
-
- void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
- SmallVectorImpl<MachineOperand> &Addr,
- const TargetRegisterClass *RC,
- SmallVectorImpl<MachineInstr*> &NewMIs) const;
-
- bool canFoldMemoryOperand(const MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops) const;
-
- MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
- MachineInstr* MI,
- const SmallVectorImpl<unsigned> &Ops,
- int FrameIndex) const;
-
- MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
- MachineInstr* MI,
- const SmallVectorImpl<unsigned> &Ops,
- MachineInstr* LoadMI) const {
- return 0;
- }
-
-
};
}
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
-static cl::opt<bool>
-Thumb2RegScavenging("enable-thumb2-reg-scavenging",
- cl::Hidden,
- cl::desc("Enable register scavenging on Thumb-2"));
-
Thumb2RegisterInfo::Thumb2RegisterInfo(const ARMBaseInstrInfo &tii,
const ARMSubtarget &sti)
: ARMBaseRegisterInfo(tii, sti) {
unsigned Idx = ConstantPool->getConstantPoolIndex(C, 4);
BuildMI(MBB, MBBI, dl, TII.get(ARM::t2LDRpci), DestReg)
- .addConstantPoolIndex(Idx).addImm(Pred).addReg(PredReg);
-}
-
-const TargetRegisterClass*
-Thumb2RegisterInfo::getPhysicalRegisterRegClass(unsigned Reg, MVT VT) const {
- if (isARMLowRegister(Reg))
- return ARM::tGPRRegisterClass;
- switch (Reg) {
- default:
- break;
- case ARM::R8: case ARM::R9: case ARM::R10: case ARM::R11:
- case ARM::R12: case ARM::SP: case ARM::LR: case ARM::PC:
- return ARM::GPRRegisterClass;
- }
-
- return TargetRegisterInfo::getPhysicalRegisterRegClass(Reg, VT);
-}
-
-bool
-Thumb2RegisterInfo::requiresRegisterScavenging(const MachineFunction &MF) const {
- return Thumb2RegScavenging;
-}
-
-bool Thumb2RegisterInfo::hasReservedCallFrame(MachineFunction &MF) const {
- const MachineFrameInfo *FFI = MF.getFrameInfo();
- unsigned CFSize = FFI->getMaxCallFrameSize();
- // It's not always a good idea to include the call frame as part of the
- // stack frame. ARM (especially Thumb) has small immediate offset to
- // address the stack frame. So a large call frame can cause poor codegen
- // and may even makes it impossible to scavenge a register.
- if (CFSize >= ((1 << 8) - 1) * 4 / 2) // Half of imm8 * 4
- return false;
-
- return !MF.getFrameInfo()->hasVarSizedObjects();
-}
-
-/// emitThumbRegPlusImmInReg - Emits a series of instructions to materialize
-/// a destreg = basereg + immediate in Thumb code. Materialize the immediate
-/// in a register using mov / mvn sequences or load the immediate from a
-/// constpool entry.
-static
-void emitThumbRegPlusImmInReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator &MBBI,
- unsigned DestReg, unsigned BaseReg,
- int NumBytes, bool CanChangeCC,
- const TargetInstrInfo &TII,
- const Thumb2RegisterInfo& MRI,
- DebugLoc dl) {
- bool isHigh = !isARMLowRegister(DestReg) ||
- (BaseReg != 0 && !isARMLowRegister(BaseReg));
- bool isSub = false;
- // Subtract doesn't have high register version. Load the negative value
- // if either base or dest register is a high register. Also, if do not
- // issue sub as part of the sequence if condition register is to be
- // preserved.
- if (NumBytes < 0 && !isHigh && CanChangeCC) {
- isSub = true;
- NumBytes = -NumBytes;
- }
- unsigned LdReg = DestReg;
- if (DestReg == ARM::SP) {
- assert(BaseReg == ARM::SP && "Unexpected!");
- LdReg = ARM::R3;
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVlor2hir), ARM::R12)
- .addReg(ARM::R3, RegState::Kill);
- }
-
- if (NumBytes <= 255 && NumBytes >= 0)
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), LdReg).addImm(NumBytes);
- else if (NumBytes < 0 && NumBytes >= -255) {
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), LdReg).addImm(NumBytes);
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tNEG), LdReg)
- .addReg(LdReg, RegState::Kill);
- } else
- MRI.emitLoadConstPool(MBB, MBBI, dl, LdReg, NumBytes);
-
- // Emit add / sub.
- int Opc = (isSub) ? ARM::tSUBrr : (isHigh ? ARM::tADDhirr : ARM::tADDrr);
- const MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl,
- TII.get(Opc), DestReg);
- if (DestReg == ARM::SP || isSub)
- MIB.addReg(BaseReg).addReg(LdReg, RegState::Kill);
- else
- MIB.addReg(LdReg).addReg(BaseReg, RegState::Kill);
- if (DestReg == ARM::SP)
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVhir2lor), ARM::R3)
- .addReg(ARM::R12, RegState::Kill);
-}
-
-/// calcNumMI - Returns the number of instructions required to materialize
-/// the specific add / sub r, c instruction.
-static unsigned calcNumMI(int Opc, int ExtraOpc, unsigned Bytes,
- unsigned NumBits, unsigned Scale) {
- unsigned NumMIs = 0;
- unsigned Chunk = ((1 << NumBits) - 1) * Scale;
-
- if (Opc == ARM::tADDrSPi) {
- unsigned ThisVal = (Bytes > Chunk) ? Chunk : Bytes;
- Bytes -= ThisVal;
- NumMIs++;
- NumBits = 8;
- Scale = 1; // Followed by a number of tADDi8.
- Chunk = ((1 << NumBits) - 1) * Scale;
- }
-
- NumMIs += Bytes / Chunk;
- if ((Bytes % Chunk) != 0)
- NumMIs++;
- if (ExtraOpc)
- NumMIs++;
- return NumMIs;
-}
-
-/// emitThumbRegPlusImmediate - Emits a series of instructions to materialize
-/// a destreg = basereg + immediate in Thumb code.
-static
-void emitThumbRegPlusImmediate(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator &MBBI,
- unsigned DestReg, unsigned BaseReg,
- int NumBytes, const TargetInstrInfo &TII,
- const Thumb2RegisterInfo& MRI,
- DebugLoc dl) {
- bool isSub = NumBytes < 0;
- unsigned Bytes = (unsigned)NumBytes;
- if (isSub) Bytes = -NumBytes;
- bool isMul4 = (Bytes & 3) == 0;
- bool isTwoAddr = false;
- bool DstNotEqBase = false;
- unsigned NumBits = 1;
- unsigned Scale = 1;
- int Opc = 0;
- int ExtraOpc = 0;
-
- if (DestReg == BaseReg && BaseReg == ARM::SP) {
- assert(isMul4 && "Thumb sp inc / dec size must be multiple of 4!");
- NumBits = 7;
- Scale = 4;
- Opc = isSub ? ARM::tSUBspi : ARM::tADDspi;
- isTwoAddr = true;
- } else if (!isSub && BaseReg == ARM::SP) {
- // r1 = add sp, 403
- // =>
- // r1 = add sp, 100 * 4
- // r1 = add r1, 3
- if (!isMul4) {
- Bytes &= ~3;
- ExtraOpc = ARM::tADDi3;
- }
- NumBits = 8;
- Scale = 4;
- Opc = ARM::tADDrSPi;
- } else {
- // sp = sub sp, c
- // r1 = sub sp, c
- // r8 = sub sp, c
- if (DestReg != BaseReg)
- DstNotEqBase = true;
- NumBits = 8;
- Opc = isSub ? ARM::tSUBi8 : ARM::tADDi8;
- isTwoAddr = true;
- }
-
- unsigned NumMIs = calcNumMI(Opc, ExtraOpc, Bytes, NumBits, Scale);
- unsigned Threshold = (DestReg == ARM::SP) ? 3 : 2;
- if (NumMIs > Threshold) {
- // This will expand into too many instructions. Load the immediate from a
- // constpool entry.
- emitThumbRegPlusImmInReg(MBB, MBBI, DestReg, BaseReg, NumBytes, true, TII,
- MRI, dl);
- return;
- }
-
- if (DstNotEqBase) {
- if (isARMLowRegister(DestReg) && isARMLowRegister(BaseReg)) {
- // If both are low registers, emit DestReg = add BaseReg, max(Imm, 7)
- unsigned Chunk = (1 << 3) - 1;
- unsigned ThisVal = (Bytes > Chunk) ? Chunk : Bytes;
- Bytes -= ThisVal;
- BuildMI(MBB, MBBI, dl,TII.get(isSub ? ARM::tSUBi3 : ARM::tADDi3), DestReg)
- .addReg(BaseReg, RegState::Kill).addImm(ThisVal);
- } else {
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), DestReg)
- .addReg(BaseReg, RegState::Kill);
- }
- BaseReg = DestReg;
- }
-
- unsigned Chunk = ((1 << NumBits) - 1) * Scale;
- while (Bytes) {
- unsigned ThisVal = (Bytes > Chunk) ? Chunk : Bytes;
- Bytes -= ThisVal;
- ThisVal /= Scale;
- // Build the new tADD / tSUB.
- if (isTwoAddr)
- BuildMI(MBB, MBBI, dl, TII.get(Opc), DestReg)
- .addReg(DestReg).addImm(ThisVal);
- else {
- bool isKill = BaseReg != ARM::SP;
- BuildMI(MBB, MBBI, dl, TII.get(Opc), DestReg)
- .addReg(BaseReg, getKillRegState(isKill)).addImm(ThisVal);
- BaseReg = DestReg;
-
- if (Opc == ARM::tADDrSPi) {
- // r4 = add sp, imm
- // r4 = add r4, imm
- // ...
- NumBits = 8;
- Scale = 1;
- Chunk = ((1 << NumBits) - 1) * Scale;
- Opc = isSub ? ARM::tSUBi8 : ARM::tADDi8;
- isTwoAddr = true;
- }
- }
- }
-
- if (ExtraOpc)
- BuildMI(MBB, MBBI, dl, TII.get(ExtraOpc), DestReg)
- .addReg(DestReg, RegState::Kill)
- .addImm(((unsigned)NumBytes) & 3);
-}
-
-static void emitSPUpdate(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator &MBBI,
- const TargetInstrInfo &TII, DebugLoc dl,
- const Thumb2RegisterInfo &MRI,
- int NumBytes) {
- emitThumbRegPlusImmediate(MBB, MBBI, ARM::SP, ARM::SP, NumBytes, TII,
- MRI, dl);
-}
-
-void Thumb2RegisterInfo::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- if (!hasReservedCallFrame(MF)) {
- // If we have alloca, convert as follows:
- // ADJCALLSTACKDOWN -> sub, sp, sp, amount
- // ADJCALLSTACKUP -> add, sp, sp, amount
- MachineInstr *Old = I;
- DebugLoc dl = Old->getDebugLoc();
- unsigned Amount = Old->getOperand(0).getImm();
- if (Amount != 0) {
- // We need to keep the stack aligned properly. To do this, we round the
- // amount of space needed for the outgoing arguments up to the next
- // alignment boundary.
- unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
- Amount = (Amount+Align-1)/Align*Align;
-
- // Replace the pseudo instruction with a new instruction...
- unsigned Opc = Old->getOpcode();
- if (Opc == ARM::ADJCALLSTACKDOWN || Opc == ARM::tADJCALLSTACKDOWN) {
- emitSPUpdate(MBB, I, TII, dl, *this, -Amount);
- } else {
- assert(Opc == ARM::ADJCALLSTACKUP || Opc == ARM::tADJCALLSTACKUP);
- emitSPUpdate(MBB, I, TII, dl, *this, Amount);
- }
- }
- }
- MBB.erase(I);
-}
-
-/// emitThumbConstant - Emit a series of instructions to materialize a
-/// constant.
-static void emitThumbConstant(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator &MBBI,
- unsigned DestReg, int Imm,
- const TargetInstrInfo &TII,
- const Thumb2RegisterInfo& MRI,
- DebugLoc dl) {
- bool isSub = Imm < 0;
- if (isSub) Imm = -Imm;
-
- int Chunk = (1 << 8) - 1;
- int ThisVal = (Imm > Chunk) ? Chunk : Imm;
- Imm -= ThisVal;
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), DestReg).addImm(ThisVal);
- if (Imm > 0)
- emitThumbRegPlusImmediate(MBB, MBBI, DestReg, DestReg, Imm, TII, MRI, dl);
- if (isSub)
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tNEG), DestReg)
- .addReg(DestReg, RegState::Kill);
-}
-
-void Thumb2RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
- int SPAdj, RegScavenger *RS) const{
- unsigned i = 0;
- MachineInstr &MI = *II;
- MachineBasicBlock &MBB = *MI.getParent();
- MachineFunction &MF = *MBB.getParent();
- ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
- DebugLoc dl = MI.getDebugLoc();
-
- while (!MI.getOperand(i).isFI()) {
- ++i;
- assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
- }
-
- unsigned FrameReg = ARM::SP;
- int FrameIndex = MI.getOperand(i).getIndex();
- int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
- MF.getFrameInfo()->getStackSize() + SPAdj;
-
- if (AFI->isGPRCalleeSavedArea1Frame(FrameIndex))
- Offset -= AFI->getGPRCalleeSavedArea1Offset();
- else if (AFI->isGPRCalleeSavedArea2Frame(FrameIndex))
- Offset -= AFI->getGPRCalleeSavedArea2Offset();
- else if (hasFP(MF)) {
- assert(SPAdj == 0 && "Unexpected");
- // There is alloca()'s in this function, must reference off the frame
- // pointer instead.
- FrameReg = getFrameRegister(MF);
- Offset -= AFI->getFramePtrSpillOffset();
- }
-
- unsigned Opcode = MI.getOpcode();
- const TargetInstrDesc &Desc = MI.getDesc();
- unsigned AddrMode = (Desc.TSFlags & ARMII::AddrModeMask);
-
- if (Opcode == ARM::tADDrSPi) {
- Offset += MI.getOperand(i+1).getImm();
-
- // Can't use tADDrSPi if it's based off the frame pointer.
- unsigned NumBits = 0;
- unsigned Scale = 1;
- if (FrameReg != ARM::SP) {
- Opcode = ARM::tADDi3;
- MI.setDesc(TII.get(ARM::tADDi3));
- NumBits = 3;
- } else {
- NumBits = 8;
- Scale = 4;
- assert((Offset & 3) == 0 &&
- "Thumb add/sub sp, #imm immediate must be multiple of 4!");
- }
-
- if (Offset == 0) {
- // Turn it into a move.
- MI.setDesc(TII.get(ARM::tMOVhir2lor));
- MI.getOperand(i).ChangeToRegister(FrameReg, false);
- MI.RemoveOperand(i+1);
- return;
- }
-
- // Common case: small offset, fits into instruction.
- unsigned Mask = (1 << NumBits) - 1;
- if (((Offset / Scale) & ~Mask) == 0) {
- // Replace the FrameIndex with sp / fp
- MI.getOperand(i).ChangeToRegister(FrameReg, false);
- MI.getOperand(i+1).ChangeToImmediate(Offset / Scale);
- return;
- }
-
- unsigned DestReg = MI.getOperand(0).getReg();
- unsigned Bytes = (Offset > 0) ? Offset : -Offset;
- unsigned NumMIs = calcNumMI(Opcode, 0, Bytes, NumBits, Scale);
- // MI would expand into a large number of instructions. Don't try to
- // simplify the immediate.
- if (NumMIs > 2) {
- emitThumbRegPlusImmediate(MBB, II, DestReg, FrameReg, Offset, TII,
- *this, dl);
- MBB.erase(II);
- return;
- }
-
- if (Offset > 0) {
- // Translate r0 = add sp, imm to
- // r0 = add sp, 255*4
- // r0 = add r0, (imm - 255*4)
- MI.getOperand(i).ChangeToRegister(FrameReg, false);
- MI.getOperand(i+1).ChangeToImmediate(Mask);
- Offset = (Offset - Mask * Scale);
- MachineBasicBlock::iterator NII = next(II);
- emitThumbRegPlusImmediate(MBB, NII, DestReg, DestReg, Offset, TII,
- *this, dl);
- } else {
- // Translate r0 = add sp, -imm to
- // r0 = -imm (this is then translated into a series of instructons)
- // r0 = add r0, sp
- emitThumbConstant(MBB, II, DestReg, Offset, TII, *this, dl);
- MI.setDesc(TII.get(ARM::tADDhirr));
- MI.getOperand(i).ChangeToRegister(DestReg, false, false, true);
- MI.getOperand(i+1).ChangeToRegister(FrameReg, false);
- }
- return;
- } else {
- unsigned ImmIdx = 0;
- int InstrOffs = 0;
- unsigned NumBits = 0;
- unsigned Scale = 1;
- switch (AddrMode) {
- case ARMII::AddrModeT1_s: {
- ImmIdx = i+1;
- InstrOffs = MI.getOperand(ImmIdx).getImm();
- NumBits = (FrameReg == ARM::SP) ? 8 : 5;
- Scale = 4;
- break;
- }
- default:
- LLVM_UNREACHABLE("Unsupported addressing mode!");
- }
-
- Offset += InstrOffs * Scale;
- assert((Offset & (Scale-1)) == 0 && "Can't encode this offset!");
-
- // Common case: small offset, fits into instruction.
- MachineOperand &ImmOp = MI.getOperand(ImmIdx);
- int ImmedOffset = Offset / Scale;
- unsigned Mask = (1 << NumBits) - 1;
- if ((unsigned)Offset <= Mask * Scale) {
- // Replace the FrameIndex with sp
- MI.getOperand(i).ChangeToRegister(FrameReg, false);
- ImmOp.ChangeToImmediate(ImmedOffset);
- return;
- }
-
- bool isThumSpillRestore = Opcode == ARM::tRestore || Opcode == ARM::tSpill;
- if (AddrMode == ARMII::AddrModeT1_s) {
- // Thumb tLDRspi, tSTRspi. These will change to instructions that use
- // a different base register.
- NumBits = 5;
- Mask = (1 << NumBits) - 1;
- }
- // If this is a thumb spill / restore, we will be using a constpool load to
- // materialize the offset.
- if (AddrMode == ARMII::AddrModeT1_s && isThumSpillRestore)
- ImmOp.ChangeToImmediate(0);
- else {
- // Otherwise, it didn't fit. Pull in what we can to simplify the immed.
- ImmedOffset = ImmedOffset & Mask;
- ImmOp.ChangeToImmediate(ImmedOffset);
- Offset &= ~(Mask*Scale);
- }
- }
-
- // If we get here, the immediate doesn't fit into the instruction. We folded
- // as much as possible above, handle the rest, providing a register that is
- // SP+LargeImm.
- assert(Offset && "This code isn't needed if offset already handled!");
-
- if (Desc.mayLoad()) {
- // Use the destination register to materialize sp + offset.
- unsigned TmpReg = MI.getOperand(0).getReg();
- bool UseRR = false;
- if (Opcode == ARM::tRestore) {
- if (FrameReg == ARM::SP)
- emitThumbRegPlusImmInReg(MBB, II, TmpReg, FrameReg,
- Offset, false, TII, *this, dl);
- else {
- emitLoadConstPool(MBB, II, dl, TmpReg, Offset);
- UseRR = true;
- }
- } else
- emitThumbRegPlusImmediate(MBB, II, TmpReg, FrameReg, Offset, TII,
- *this, dl);
- MI.setDesc(TII.get(ARM::tLDR));
- MI.getOperand(i).ChangeToRegister(TmpReg, false, false, true);
- if (UseRR)
- // Use [reg, reg] addrmode.
- MI.addOperand(MachineOperand::CreateReg(FrameReg, false));
- else // tLDR has an extra register operand.
- MI.addOperand(MachineOperand::CreateReg(0, false));
- } else if (Desc.mayStore()) {
- // FIXME! This is horrific!!! We need register scavenging.
- // Our temporary workaround has marked r3 unavailable. Of course, r3 is
- // also a ABI register so it's possible that is is the register that is
- // being storing here. If that's the case, we do the following:
- // r12 = r2
- // Use r2 to materialize sp + offset
- // str r3, r2
- // r2 = r12
- unsigned ValReg = MI.getOperand(0).getReg();
- unsigned TmpReg = ARM::R3;
- bool UseRR = false;
- if (ValReg == ARM::R3) {
- BuildMI(MBB, II, dl, TII.get(ARM::tMOVlor2hir), ARM::R12)
- .addReg(ARM::R2, RegState::Kill);
- TmpReg = ARM::R2;
- }
- if (TmpReg == ARM::R3 && AFI->isR3LiveIn())
- BuildMI(MBB, II, dl, TII.get(ARM::tMOVlor2hir), ARM::R12)
- .addReg(ARM::R3, RegState::Kill);
- if (Opcode == ARM::tSpill) {
- if (FrameReg == ARM::SP)
- emitThumbRegPlusImmInReg(MBB, II, TmpReg, FrameReg,
- Offset, false, TII, *this, dl);
- else {
- emitLoadConstPool(MBB, II, dl, TmpReg, Offset);
- UseRR = true;
- }
- } else
- emitThumbRegPlusImmediate(MBB, II, TmpReg, FrameReg, Offset, TII,
- *this, dl);
- MI.setDesc(TII.get(ARM::tSTR));
- MI.getOperand(i).ChangeToRegister(TmpReg, false, false, true);
- if (UseRR) // Use [reg, reg] addrmode.
- MI.addOperand(MachineOperand::CreateReg(FrameReg, false));
- else // tSTR has an extra register operand.
- MI.addOperand(MachineOperand::CreateReg(0, false));
-
- MachineBasicBlock::iterator NII = next(II);
- if (ValReg == ARM::R3)
- BuildMI(MBB, NII, dl, TII.get(ARM::tMOVhir2lor), ARM::R2)
- .addReg(ARM::R12, RegState::Kill);
- if (TmpReg == ARM::R3 && AFI->isR3LiveIn())
- BuildMI(MBB, NII, dl, TII.get(ARM::tMOVhir2lor), ARM::R3)
- .addReg(ARM::R12, RegState::Kill);
- } else
- assert(false && "Unexpected opcode!");
-}
-
-void Thumb2RegisterInfo::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front();
- MachineBasicBlock::iterator MBBI = MBB.begin();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
- unsigned VARegSaveSize = AFI->getVarArgsRegSaveSize();
- unsigned NumBytes = MFI->getStackSize();
- const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
- DebugLoc dl = (MBBI != MBB.end() ?
- MBBI->getDebugLoc() : DebugLoc::getUnknownLoc());
-
- // Check if R3 is live in. It might have to be used as a scratch register.
- for (MachineRegisterInfo::livein_iterator I =MF.getRegInfo().livein_begin(),
- E = MF.getRegInfo().livein_end(); I != E; ++I) {
- if (I->first == ARM::R3) {
- AFI->setR3IsLiveIn(true);
- break;
- }
- }
-
- // Thumb add/sub sp, imm8 instructions implicitly multiply the offset by 4.
- NumBytes = (NumBytes + 3) & ~3;
- MFI->setStackSize(NumBytes);
-
- // Determine the sizes of each callee-save spill areas and record which frame
- // belongs to which callee-save spill areas.
- unsigned GPRCS1Size = 0, GPRCS2Size = 0, DPRCSSize = 0;
- int FramePtrSpillFI = 0;
-
- if (VARegSaveSize)
- emitSPUpdate(MBB, MBBI, TII, dl, *this, -VARegSaveSize);
-
- if (!AFI->hasStackFrame()) {
- if (NumBytes != 0)
- emitSPUpdate(MBB, MBBI, TII, dl, *this, -NumBytes);
- return;
- }
-
- for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
- unsigned Reg = CSI[i].getReg();
- int FI = CSI[i].getFrameIdx();
- switch (Reg) {
- case ARM::R4:
- case ARM::R5:
- case ARM::R6:
- case ARM::R7:
- case ARM::LR:
- if (Reg == FramePtr)
- FramePtrSpillFI = FI;
- AFI->addGPRCalleeSavedArea1Frame(FI);
- GPRCS1Size += 4;
- break;
- case ARM::R8:
- case ARM::R9:
- case ARM::R10:
- case ARM::R11:
- if (Reg == FramePtr)
- FramePtrSpillFI = FI;
- if (STI.isTargetDarwin()) {
- AFI->addGPRCalleeSavedArea2Frame(FI);
- GPRCS2Size += 4;
- } else {
- AFI->addGPRCalleeSavedArea1Frame(FI);
- GPRCS1Size += 4;
- }
- break;
- default:
- AFI->addDPRCalleeSavedAreaFrame(FI);
- DPRCSSize += 8;
- }
- }
-
- if (MBBI != MBB.end() && MBBI->getOpcode() == ARM::tPUSH) {
- ++MBBI;
- if (MBBI != MBB.end())
- dl = MBBI->getDebugLoc();
- }
-
- // Darwin ABI requires FP to point to the stack slot that contains the
- // previous FP.
- if (STI.isTargetDarwin() || hasFP(MF)) {
- MachineInstrBuilder MIB =
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tADDrSPi), FramePtr)
- .addFrameIndex(FramePtrSpillFI).addImm(0);
- }
-
- // Determine starting offsets of spill areas.
- unsigned DPRCSOffset = NumBytes - (GPRCS1Size + GPRCS2Size + DPRCSSize);
- unsigned GPRCS2Offset = DPRCSOffset + DPRCSSize;
- unsigned GPRCS1Offset = GPRCS2Offset + GPRCS2Size;
- AFI->setFramePtrSpillOffset(MFI->getObjectOffset(FramePtrSpillFI) + NumBytes);
- AFI->setGPRCalleeSavedArea1Offset(GPRCS1Offset);
- AFI->setGPRCalleeSavedArea2Offset(GPRCS2Offset);
- AFI->setDPRCalleeSavedAreaOffset(DPRCSOffset);
-
- NumBytes = DPRCSOffset;
- if (NumBytes) {
- // Insert it after all the callee-save spills.
- emitSPUpdate(MBB, MBBI, TII, dl, *this, -NumBytes);
- }
-
- if (STI.isTargetELF() && hasFP(MF)) {
- MFI->setOffsetAdjustment(MFI->getOffsetAdjustment() -
- AFI->getFramePtrSpillOffset());
- }
-
- AFI->setGPRCalleeSavedArea1Size(GPRCS1Size);
- AFI->setGPRCalleeSavedArea2Size(GPRCS2Size);
- AFI->setDPRCalleeSavedAreaSize(DPRCSSize);
+ .addConstantPoolIndex(Idx).addImm((int64_t)ARMCC::AL).addReg(0);
}
-static bool isCalleeSavedRegister(unsigned Reg, const unsigned *CSRegs) {
- for (unsigned i = 0; CSRegs[i]; ++i)
- if (Reg == CSRegs[i])
- return true;
+bool Thumb2RegisterInfo::
+requiresRegisterScavenging(const MachineFunction &MF) const {
+ // FIXME
return false;
}
-
-static bool isCSRestore(MachineInstr *MI, const unsigned *CSRegs) {
- return (MI->getOpcode() == ARM::tRestore &&
- MI->getOperand(1).isFI() &&
- isCalleeSavedRegister(MI->getOperand(0).getReg(), CSRegs));
-}
-
-void Thumb2RegisterInfo::emitEpilogue(MachineFunction &MF,
- MachineBasicBlock &MBB) const {
- MachineBasicBlock::iterator MBBI = prior(MBB.end());
- assert((MBBI->getOpcode() == ARM::tBX_RET ||
- MBBI->getOpcode() == ARM::tPOP_RET) &&
- "Can only insert epilog into returning blocks");
- DebugLoc dl = MBBI->getDebugLoc();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
- unsigned VARegSaveSize = AFI->getVarArgsRegSaveSize();
- int NumBytes = (int)MFI->getStackSize();
-
- if (!AFI->hasStackFrame()) {
- if (NumBytes != 0)
- emitSPUpdate(MBB, MBBI, TII, dl, *this, NumBytes);
- } else {
- // Unwind MBBI to point to first LDR / FLDD.
- const unsigned *CSRegs = getCalleeSavedRegs();
- if (MBBI != MBB.begin()) {
- do
- --MBBI;
- while (MBBI != MBB.begin() && isCSRestore(MBBI, CSRegs));
- if (!isCSRestore(MBBI, CSRegs))
- ++MBBI;
- }
-
- // Move SP to start of FP callee save spill area.
- NumBytes -= (AFI->getGPRCalleeSavedArea1Size() +
- AFI->getGPRCalleeSavedArea2Size() +
- AFI->getDPRCalleeSavedAreaSize());
-
- if (hasFP(MF)) {
- NumBytes = AFI->getFramePtrSpillOffset() - NumBytes;
- // Reset SP based on frame pointer only if the stack frame extends beyond
- // frame pointer stack slot or target is ELF and the function has FP.
- if (NumBytes)
- emitThumbRegPlusImmediate(MBB, MBBI, ARM::SP, FramePtr, -NumBytes,
- TII, *this, dl);
- else
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVlor2hir), ARM::SP)
- .addReg(FramePtr);
- } else {
- if (MBBI->getOpcode() == ARM::tBX_RET &&
- &MBB.front() != MBBI &&
- prior(MBBI)->getOpcode() == ARM::tPOP) {
- MachineBasicBlock::iterator PMBBI = prior(MBBI);
- emitSPUpdate(MBB, PMBBI, TII, dl, *this, NumBytes);
- } else
- emitSPUpdate(MBB, MBBI, TII, dl, *this, NumBytes);
- }
- }
-
- if (VARegSaveSize) {
- // Epilogue for vararg functions: pop LR to R3 and branch off it.
- // FIXME: Verify this is still ok when R3 is no longer being reserved.
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tPOP)).addReg(ARM::R3);
-
- emitSPUpdate(MBB, MBBI, TII, dl, *this, VARegSaveSize);
-
- BuildMI(MBB, MBBI, dl, TII.get(ARM::tBX_RET_vararg)).addReg(ARM::R3);
- MBB.erase(MBBI);
- }
-}
ARMCC::CondCodes Pred = ARMCC::AL,
unsigned PredReg = 0) const;
- /// Code Generation virtual methods...
- const TargetRegisterClass *
- getPhysicalRegisterRegClass(unsigned Reg, MVT VT = MVT::Other) const;
-
bool requiresRegisterScavenging(const MachineFunction &MF) const;
-
- bool hasReservedCallFrame(MachineFunction &MF) const;
-
- void eliminateCallFramePseudoInstr(MachineFunction &MF,
- MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const;
-
- void eliminateFrameIndex(MachineBasicBlock::iterator II,
- int SPAdj, RegScavenger *RS = NULL) const;
-
- void emitPrologue(MachineFunction &MF) const;
- void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
};
}
-; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep smmul | count 1
+; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep smull | count 1
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep umull | count 1
define i32 @smulhi(i32 %x, i32 %y) {
-; XFAIL: *
-; fixme
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep mov | count 3
; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep mvn | count 1
projects / oota-llvm.git / commitdiff