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-rw-r--r--lib/Target/ARM/ARMBaseInstrInfo.cpp254
1 files changed, 215 insertions, 39 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 0288db9..7a315c4 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -108,7 +108,7 @@ ARMBaseInstrInfo::CreateTargetHazardRecognizer(const TargetSubtargetInfo *STI,
const ScheduleDAG *DAG) const {
if (usePreRAHazardRecognizer()) {
const InstrItineraryData *II =
- &static_cast<const ARMSubtarget *>(STI)->getInstrItineraryData();
+ static_cast<const ARMSubtarget *>(STI)->getInstrItineraryData();
return new ScoreboardHazardRecognizer(II, DAG, "pre-RA-sched");
}
return TargetInstrInfo::CreateTargetHazardRecognizer(STI, DAG);
@@ -518,6 +518,42 @@ bool ARMBaseInstrInfo::DefinesPredicate(MachineInstr *MI,
return Found;
}
+static bool isCPSRDefined(const MachineInstr *MI) {
+ for (const auto &MO : MI->operands())
+ if (MO.isReg() && MO.getReg() == ARM::CPSR && MO.isDef())
+ return true;
+ return false;
+}
+
+static bool isEligibleForITBlock(const MachineInstr *MI) {
+ switch (MI->getOpcode()) {
+ default: return true;
+ case ARM::tADC: // ADC (register) T1
+ case ARM::tADDi3: // ADD (immediate) T1
+ case ARM::tADDi8: // ADD (immediate) T2
+ case ARM::tADDrr: // ADD (register) T1
+ case ARM::tAND: // AND (register) T1
+ case ARM::tASRri: // ASR (immediate) T1
+ case ARM::tASRrr: // ASR (register) T1
+ case ARM::tBIC: // BIC (register) T1
+ case ARM::tEOR: // EOR (register) T1
+ case ARM::tLSLri: // LSL (immediate) T1
+ case ARM::tLSLrr: // LSL (register) T1
+ case ARM::tLSRri: // LSR (immediate) T1
+ case ARM::tLSRrr: // LSR (register) T1
+ case ARM::tMUL: // MUL T1
+ case ARM::tMVN: // MVN (register) T1
+ case ARM::tORR: // ORR (register) T1
+ case ARM::tROR: // ROR (register) T1
+ case ARM::tRSB: // RSB (immediate) T1
+ case ARM::tSBC: // SBC (register) T1
+ case ARM::tSUBi3: // SUB (immediate) T1
+ case ARM::tSUBi8: // SUB (immediate) T2
+ case ARM::tSUBrr: // SUB (register) T1
+ return !isCPSRDefined(MI);
+ }
+}
+
/// isPredicable - Return true if the specified instruction can be predicated.
/// By default, this returns true for every instruction with a
/// PredicateOperand.
@@ -525,6 +561,9 @@ bool ARMBaseInstrInfo::isPredicable(MachineInstr *MI) const {
if (!MI->isPredicable())
return false;
+ if (!isEligibleForITBlock(MI))
+ return false;
+
ARMFunctionInfo *AFI =
MI->getParent()->getParent()->getInfo<ARMFunctionInfo>();
@@ -555,16 +594,6 @@ template <> bool IsCPSRDead<MachineInstr>(MachineInstr *MI) {
}
}
-/// FIXME: Works around a gcc miscompilation with -fstrict-aliasing.
-LLVM_ATTRIBUTE_NOINLINE
-static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT,
- unsigned JTI);
-static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT,
- unsigned JTI) {
- assert(JTI < JT.size());
- return JT[JTI].MBBs.size();
-}
-
/// GetInstSize - Return the size of the specified MachineInstr.
///
unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
@@ -637,7 +666,7 @@ unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
// bytes, we can use 16-bit entries instead. Then there won't be an
// alignment issue.
unsigned InstSize = (Opc == ARM::tBR_JTr || Opc == ARM::t2BR_JT) ? 2 : 4;
- unsigned NumEntries = getNumJTEntries(JT, JTI);
+ unsigned NumEntries = JT[JTI].MBBs.size();
if (Opc == ARM::t2TBB_JT && (NumEntries & 1))
// Make sure the instruction that follows TBB is 2-byte aligned.
// FIXME: Constant island pass should insert an "ALIGN" instruction
@@ -645,6 +674,8 @@ unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
++NumEntries;
return NumEntries * EntrySize + InstSize;
}
+ case ARM::SPACE:
+ return MI->getOperand(1).getImm();
}
}
@@ -659,6 +690,49 @@ unsigned ARMBaseInstrInfo::getInstBundleLength(const MachineInstr *MI) const {
return Size;
}
+void ARMBaseInstrInfo::copyFromCPSR(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned DestReg, bool KillSrc,
+ const ARMSubtarget &Subtarget) const {
+ unsigned Opc = Subtarget.isThumb()
+ ? (Subtarget.isMClass() ? ARM::t2MRS_M : ARM::t2MRS_AR)
+ : ARM::MRS;
+
+ MachineInstrBuilder MIB =
+ BuildMI(MBB, I, I->getDebugLoc(), get(Opc), DestReg);
+
+ // There is only 1 A/R class MRS instruction, and it always refers to
+ // APSR. However, there are lots of other possibilities on M-class cores.
+ if (Subtarget.isMClass())
+ MIB.addImm(0x800);
+
+ AddDefaultPred(MIB);
+
+ MIB.addReg(ARM::CPSR, RegState::Implicit | getKillRegState(KillSrc));
+}
+
+void ARMBaseInstrInfo::copyToCPSR(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned SrcReg, bool KillSrc,
+ const ARMSubtarget &Subtarget) const {
+ unsigned Opc = Subtarget.isThumb()
+ ? (Subtarget.isMClass() ? ARM::t2MSR_M : ARM::t2MSR_AR)
+ : ARM::MSR;
+
+ MachineInstrBuilder MIB = BuildMI(MBB, I, I->getDebugLoc(), get(Opc));
+
+ if (Subtarget.isMClass())
+ MIB.addImm(0x800);
+ else
+ MIB.addImm(8);
+
+ MIB.addReg(SrcReg, getKillRegState(KillSrc));
+
+ AddDefaultPred(MIB);
+
+ MIB.addReg(ARM::CPSR, RegState::Implicit | RegState::Define);
+}
+
void ARMBaseInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I, DebugLoc DL,
unsigned DestReg, unsigned SrcReg,
@@ -682,7 +756,7 @@ void ARMBaseInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
Opc = ARM::VMOVRS;
else if (SPRDest && GPRSrc)
Opc = ARM::VMOVSR;
- else if (ARM::DPRRegClass.contains(DestReg, SrcReg))
+ else if (ARM::DPRRegClass.contains(DestReg, SrcReg) && !Subtarget.isFPOnlySP())
Opc = ARM::VMOVD;
else if (ARM::QPRRegClass.contains(DestReg, SrcReg))
Opc = ARM::VORRq;
@@ -742,6 +816,16 @@ void ARMBaseInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
BeginIdx = ARM::dsub_0;
SubRegs = 4;
Spacing = 2;
+ } else if (ARM::DPRRegClass.contains(DestReg, SrcReg) && Subtarget.isFPOnlySP()) {
+ Opc = ARM::VMOVS;
+ BeginIdx = ARM::ssub_0;
+ SubRegs = 2;
+ } else if (SrcReg == ARM::CPSR) {
+ copyFromCPSR(MBB, I, DestReg, KillSrc, Subtarget);
+ return;
+ } else if (DestReg == ARM::CPSR) {
+ copyToCPSR(MBB, I, SrcReg, KillSrc, Subtarget);
+ return;
}
assert(Opc && "Impossible reg-to-reg copy");
@@ -1174,12 +1258,26 @@ unsigned ARMBaseInstrInfo::isLoadFromStackSlotPostFE(const MachineInstr *MI,
return MI->mayLoad() && hasLoadFromStackSlot(MI, Dummy, FrameIndex);
}
-bool ARMBaseInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const{
+bool
+ARMBaseInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
+ MachineFunction &MF = *MI->getParent()->getParent();
+ Reloc::Model RM = MF.getTarget().getRelocationModel();
+
+ if (MI->getOpcode() == TargetOpcode::LOAD_STACK_GUARD) {
+ assert(getSubtarget().getTargetTriple().getObjectFormat() ==
+ Triple::MachO &&
+ "LOAD_STACK_GUARD currently supported only for MachO.");
+ expandLoadStackGuard(MI, RM);
+ MI->getParent()->erase(MI);
+ return true;
+ }
+
// This hook gets to expand COPY instructions before they become
// copyPhysReg() calls. Look for VMOVS instructions that can legally be
// widened to VMOVD. We prefer the VMOVD when possible because it may be
// changed into a VORR that can go down the NEON pipeline.
- if (!WidenVMOVS || !MI->isCopy() || Subtarget.isCortexA15())
+ if (!WidenVMOVS || !MI->isCopy() || Subtarget.isCortexA15() ||
+ Subtarget.isFPOnlySP())
return false;
// Look for a copy between even S-registers. That is where we keep floats
@@ -2832,7 +2930,7 @@ static unsigned getNumMicroOpsSwiftLdSt(const InstrItineraryData *ItinData,
// FIXME: The current MachineInstr design does not support relying on machine
// mem operands to determine the width of a memory access. Instead, we expect
// the target to provide this information based on the instruction opcode and
-// operands. However, using MachineMemOperand is a the best solution now for
+// operands. However, using MachineMemOperand is the best solution now for
// two reasons:
//
// 1) getNumMicroOps tries to infer LDM memory width from the total number of MI
@@ -3933,6 +4031,38 @@ bool ARMBaseInstrInfo::verifyInstruction(const MachineInstr *MI,
return true;
}
+// LoadStackGuard has so far only been implemented for MachO. Different code
+// sequence is needed for other targets.
+void ARMBaseInstrInfo::expandLoadStackGuardBase(MachineBasicBlock::iterator MI,
+ unsigned LoadImmOpc,
+ unsigned LoadOpc,
+ Reloc::Model RM) const {
+ MachineBasicBlock &MBB = *MI->getParent();
+ DebugLoc DL = MI->getDebugLoc();
+ unsigned Reg = MI->getOperand(0).getReg();
+ const GlobalValue *GV =
+ cast<GlobalValue>((*MI->memoperands_begin())->getValue());
+ MachineInstrBuilder MIB;
+
+ BuildMI(MBB, MI, DL, get(LoadImmOpc), Reg)
+ .addGlobalAddress(GV, 0, ARMII::MO_NONLAZY);
+
+ if (Subtarget.GVIsIndirectSymbol(GV, RM)) {
+ MIB = BuildMI(MBB, MI, DL, get(LoadOpc), Reg);
+ MIB.addReg(Reg, RegState::Kill).addImm(0);
+ unsigned Flag = MachineMemOperand::MOLoad | MachineMemOperand::MOInvariant;
+ MachineMemOperand *MMO = MBB.getParent()->
+ getMachineMemOperand(MachinePointerInfo::getGOT(), Flag, 4, 4);
+ MIB.addMemOperand(MMO);
+ AddDefaultPred(MIB);
+ }
+
+ MIB = BuildMI(MBB, MI, DL, get(LoadOpc), Reg);
+ MIB.addReg(Reg, RegState::Kill).addImm(0);
+ MIB.setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
+ AddDefaultPred(MIB);
+}
+
bool
ARMBaseInstrInfo::isFpMLxInstruction(unsigned Opcode, unsigned &MulOpc,
unsigned &AddSubOpc,
@@ -4361,29 +4491,6 @@ breakPartialRegDependency(MachineBasicBlock::iterator MI,
MI->addRegisterKilled(DReg, TRI, true);
}
-void ARMBaseInstrInfo::getUnconditionalBranch(
- MCInst &Branch, const MCSymbolRefExpr *BranchTarget) const {
- if (Subtarget.isThumb())
- Branch.setOpcode(ARM::tB);
- else if (Subtarget.isThumb2())
- Branch.setOpcode(ARM::t2B);
- else
- Branch.setOpcode(ARM::Bcc);
-
- Branch.addOperand(MCOperand::CreateExpr(BranchTarget));
- Branch.addOperand(MCOperand::CreateImm(ARMCC::AL));
- Branch.addOperand(MCOperand::CreateReg(0));
-}
-
-void ARMBaseInstrInfo::getTrap(MCInst &MI) const {
- if (Subtarget.isThumb())
- MI.setOpcode(ARM::tTRAP);
- else if (Subtarget.useNaClTrap())
- MI.setOpcode(ARM::TRAPNaCl);
- else
- MI.setOpcode(ARM::TRAP);
-}
-
bool ARMBaseInstrInfo::hasNOP() const {
return (Subtarget.getFeatureBits() & ARM::HasV6T2Ops) != 0;
}
@@ -4401,3 +4508,72 @@ bool ARMBaseInstrInfo::isSwiftFastImmShift(const MachineInstr *MI) const {
return false;
}
+
+bool ARMBaseInstrInfo::getRegSequenceLikeInputs(
+ const MachineInstr &MI, unsigned DefIdx,
+ SmallVectorImpl<RegSubRegPairAndIdx> &InputRegs) const {
+ assert(DefIdx < MI.getDesc().getNumDefs() && "Invalid definition index");
+ assert(MI.isRegSequenceLike() && "Invalid kind of instruction");
+
+ switch (MI.getOpcode()) {
+ case ARM::VMOVDRR:
+ // dX = VMOVDRR rY, rZ
+ // is the same as:
+ // dX = REG_SEQUENCE rY, ssub_0, rZ, ssub_1
+ // Populate the InputRegs accordingly.
+ // rY
+ const MachineOperand *MOReg = &MI.getOperand(1);
+ InputRegs.push_back(
+ RegSubRegPairAndIdx(MOReg->getReg(), MOReg->getSubReg(), ARM::ssub_0));
+ // rZ
+ MOReg = &MI.getOperand(2);
+ InputRegs.push_back(
+ RegSubRegPairAndIdx(MOReg->getReg(), MOReg->getSubReg(), ARM::ssub_1));
+ return true;
+ }
+ llvm_unreachable("Target dependent opcode missing");
+}
+
+bool ARMBaseInstrInfo::getExtractSubregLikeInputs(
+ const MachineInstr &MI, unsigned DefIdx,
+ RegSubRegPairAndIdx &InputReg) const {
+ assert(DefIdx < MI.getDesc().getNumDefs() && "Invalid definition index");
+ assert(MI.isExtractSubregLike() && "Invalid kind of instruction");
+
+ switch (MI.getOpcode()) {
+ case ARM::VMOVRRD:
+ // rX, rY = VMOVRRD dZ
+ // is the same as:
+ // rX = EXTRACT_SUBREG dZ, ssub_0
+ // rY = EXTRACT_SUBREG dZ, ssub_1
+ const MachineOperand &MOReg = MI.getOperand(2);
+ InputReg.Reg = MOReg.getReg();
+ InputReg.SubReg = MOReg.getSubReg();
+ InputReg.SubIdx = DefIdx == 0 ? ARM::ssub_0 : ARM::ssub_1;
+ return true;
+ }
+ llvm_unreachable("Target dependent opcode missing");
+}
+
+bool ARMBaseInstrInfo::getInsertSubregLikeInputs(
+ const MachineInstr &MI, unsigned DefIdx, RegSubRegPair &BaseReg,
+ RegSubRegPairAndIdx &InsertedReg) const {
+ assert(DefIdx < MI.getDesc().getNumDefs() && "Invalid definition index");
+ assert(MI.isInsertSubregLike() && "Invalid kind of instruction");
+
+ switch (MI.getOpcode()) {
+ case ARM::VSETLNi32:
+ // dX = VSETLNi32 dY, rZ, imm
+ const MachineOperand &MOBaseReg = MI.getOperand(1);
+ const MachineOperand &MOInsertedReg = MI.getOperand(2);
+ const MachineOperand &MOIndex = MI.getOperand(3);
+ BaseReg.Reg = MOBaseReg.getReg();
+ BaseReg.SubReg = MOBaseReg.getSubReg();
+
+ InsertedReg.Reg = MOInsertedReg.getReg();
+ InsertedReg.SubReg = MOInsertedReg.getSubReg();
+ InsertedReg.SubIdx = MOIndex.getImm() == 0 ? ARM::ssub_0 : ARM::ssub_1;
+ return true;
+ }
+ llvm_unreachable("Target dependent opcode missing");
+}
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