diff options
Diffstat (limited to 'contrib/llvm/lib/Target/ARM/ARMFrameLowering.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/ARM/ARMFrameLowering.cpp | 532 |
1 files changed, 331 insertions, 201 deletions
diff --git a/contrib/llvm/lib/Target/ARM/ARMFrameLowering.cpp b/contrib/llvm/lib/Target/ARM/ARMFrameLowering.cpp index c72db8a..16b54e8 100644 --- a/contrib/llvm/lib/Target/ARM/ARMFrameLowering.cpp +++ b/contrib/llvm/lib/Target/ARM/ARMFrameLowering.cpp @@ -16,19 +16,49 @@ #include "ARMBaseRegisterInfo.h" #include "ARMConstantPoolValue.h" #include "ARMMachineFunctionInfo.h" +#include "ARMSubtarget.h" #include "MCTargetDesc/ARMAddressingModes.h" +#include "MCTargetDesc/ARMBaseInfo.h" +#include "llvm/ADT/BitVector.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/ADT/SmallPtrSet.h" +#include "llvm/ADT/SmallVector.h" +#include "llvm/CodeGen/MachineBasicBlock.h" +#include "llvm/CodeGen/MachineConstantPool.h" #include "llvm/CodeGen/MachineFrameInfo.h" #include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineInstr.h" #include "llvm/CodeGen/MachineInstrBuilder.h" #include "llvm/CodeGen/MachineModuleInfo.h" +#include "llvm/CodeGen/MachineOperand.h" #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/CodeGen/RegisterScavenging.h" -#include "llvm/MC/MCAsmInfo.h" +#include "llvm/IR/Attributes.h" #include "llvm/IR/CallingConv.h" +#include "llvm/IR/DebugLoc.h" #include "llvm/IR/Function.h" #include "llvm/MC/MCContext.h" +#include "llvm/MC/MCDwarf.h" +#include "llvm/MC/MCRegisterInfo.h" +#include "llvm/Support/CodeGen.h" #include "llvm/Support/CommandLine.h" +#include "llvm/Support/Compiler.h" +#include "llvm/Support/Debug.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/MathExtras.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Target/TargetInstrInfo.h" +#include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetOptions.h" +#include "llvm/Target/TargetRegisterInfo.h" +#include "llvm/Target/TargetSubtargetInfo.h" +#include <algorithm> +#include <cassert> +#include <cstddef> +#include <cstdint> +#include <iterator> +#include <utility> +#include <vector> #define DEBUG_TYPE "arm-frame-lowering" @@ -180,6 +210,7 @@ static bool WindowsRequiresStackProbe(const MachineFunction &MF, } namespace { + struct StackAdjustingInsts { struct InstInfo { MachineBasicBlock::iterator I; @@ -196,7 +227,8 @@ struct StackAdjustingInsts { } void addExtraBytes(const MachineBasicBlock::iterator I, unsigned ExtraBytes) { - auto Info = find_if(Insts, [&](InstInfo &Info) { return Info.I == I; }); + auto Info = + llvm::find_if(Insts, [&](InstInfo &Info) { return Info.I == I; }); assert(Info != Insts.end() && "invalid sp adjusting instruction"); Info->SPAdjust += ExtraBytes; } @@ -219,7 +251,8 @@ struct StackAdjustingInsts { } } }; -} + +} // end anonymous namespace /// Emit an instruction sequence that will align the address in /// register Reg by zero-ing out the lower bits. For versions of the @@ -252,38 +285,55 @@ static void emitAligningInstructions(MachineFunction &MF, ARMFunctionInfo *AFI, // lsr Reg, Reg, log2(Alignment) // lsl Reg, Reg, log2(Alignment) if (CanUseBFC) { - AddDefaultPred(BuildMI(MBB, MBBI, DL, TII.get(ARM::BFC), Reg) - .addReg(Reg, RegState::Kill) - .addImm(~AlignMask)); + BuildMI(MBB, MBBI, DL, TII.get(ARM::BFC), Reg) + .addReg(Reg, RegState::Kill) + .addImm(~AlignMask) + .add(predOps(ARMCC::AL)); } else if (AlignMask <= 255) { - AddDefaultCC( - AddDefaultPred(BuildMI(MBB, MBBI, DL, TII.get(ARM::BICri), Reg) - .addReg(Reg, RegState::Kill) - .addImm(AlignMask))); + BuildMI(MBB, MBBI, DL, TII.get(ARM::BICri), Reg) + .addReg(Reg, RegState::Kill) + .addImm(AlignMask) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); } else { assert(!MustBeSingleInstruction && "Shouldn't call emitAligningInstructions demanding a single " "instruction to be emitted for large stack alignment for a target " "without BFC."); - AddDefaultCC(AddDefaultPred( - BuildMI(MBB, MBBI, DL, TII.get(ARM::MOVsi), Reg) - .addReg(Reg, RegState::Kill) - .addImm(ARM_AM::getSORegOpc(ARM_AM::lsr, NrBitsToZero)))); - AddDefaultCC(AddDefaultPred( - BuildMI(MBB, MBBI, DL, TII.get(ARM::MOVsi), Reg) - .addReg(Reg, RegState::Kill) - .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, NrBitsToZero)))); + BuildMI(MBB, MBBI, DL, TII.get(ARM::MOVsi), Reg) + .addReg(Reg, RegState::Kill) + .addImm(ARM_AM::getSORegOpc(ARM_AM::lsr, NrBitsToZero)) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); + BuildMI(MBB, MBBI, DL, TII.get(ARM::MOVsi), Reg) + .addReg(Reg, RegState::Kill) + .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, NrBitsToZero)) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); } } else { // Since this is only reached for Thumb-2 targets, the BFC instruction // should always be available. assert(CanUseBFC); - AddDefaultPred(BuildMI(MBB, MBBI, DL, TII.get(ARM::t2BFC), Reg) - .addReg(Reg, RegState::Kill) - .addImm(~AlignMask)); + BuildMI(MBB, MBBI, DL, TII.get(ARM::t2BFC), Reg) + .addReg(Reg, RegState::Kill) + .addImm(~AlignMask) + .add(predOps(ARMCC::AL)); } } +/// We need the offset of the frame pointer relative to other MachineFrameInfo +/// offsets which are encoded relative to SP at function begin. +/// See also emitPrologue() for how the FP is set up. +/// Unfortunately we cannot determine this value in determineCalleeSaves() yet +/// as assignCalleeSavedSpillSlots() hasn't run at this point. Instead we use +/// this to produce a conservative estimate that we check in an assert() later. +static int getMaxFPOffset(const Function &F, const ARMFunctionInfo &AFI) { + // This is a conservative estimation: Assume the frame pointer being r7 and + // pc("r15") up to r8 getting spilled before (= 8 registers). + return -AFI.getArgRegsSaveSize() - (8 * 4); +} + void ARMFrameLowering::emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const { MachineBasicBlock::iterator MBBI = MBB.begin(); @@ -394,8 +444,10 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF, unsigned DPRCSOffset = GPRCS2Offset - DPRGapSize - DPRCSSize; int FramePtrOffsetInPush = 0; if (HasFP) { - FramePtrOffsetInPush = - MFI.getObjectOffset(FramePtrSpillFI) + ArgRegsSaveSize; + int FPOffset = MFI.getObjectOffset(FramePtrSpillFI); + assert(getMaxFPOffset(*MF.getFunction(), *AFI) <= FPOffset && + "Max FP estimation is wrong"); + FramePtrOffsetInPush = FPOffset + ArgRegsSaveSize; AFI->setFramePtrSpillOffset(MFI.getObjectOffset(FramePtrSpillFI) + NumBytes); } @@ -448,9 +500,10 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF, uint32_t NumWords = NumBytes >> 2; if (NumWords < 65536) - AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::t2MOVi16), ARM::R4) - .addImm(NumWords) - .setMIFlags(MachineInstr::FrameSetup)); + BuildMI(MBB, MBBI, dl, TII.get(ARM::t2MOVi16), ARM::R4) + .addImm(NumWords) + .setMIFlags(MachineInstr::FrameSetup) + .add(predOps(ARMCC::AL)); else BuildMI(MBB, MBBI, dl, TII.get(ARM::t2MOVi32imm), ARM::R4) .addImm(NumWords) @@ -462,10 +515,10 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF, case CodeModel::Default: case CodeModel::Kernel: BuildMI(MBB, MBBI, dl, TII.get(ARM::tBL)) - .addImm((unsigned)ARMCC::AL).addReg(0) - .addExternalSymbol("__chkstk") - .addReg(ARM::R4, RegState::Implicit) - .setMIFlags(MachineInstr::FrameSetup); + .add(predOps(ARMCC::AL)) + .addExternalSymbol("__chkstk") + .addReg(ARM::R4, RegState::Implicit) + .setMIFlags(MachineInstr::FrameSetup); break; case CodeModel::Large: case CodeModel::JITDefault: @@ -474,18 +527,19 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF, .setMIFlags(MachineInstr::FrameSetup); BuildMI(MBB, MBBI, dl, TII.get(ARM::tBLXr)) - .addImm((unsigned)ARMCC::AL).addReg(0) - .addReg(ARM::R12, RegState::Kill) - .addReg(ARM::R4, RegState::Implicit) - .setMIFlags(MachineInstr::FrameSetup); + .add(predOps(ARMCC::AL)) + .addReg(ARM::R12, RegState::Kill) + .addReg(ARM::R4, RegState::Implicit) + .setMIFlags(MachineInstr::FrameSetup); break; } - AddDefaultCC(AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::t2SUBrr), - ARM::SP) - .addReg(ARM::SP, RegState::Kill) - .addReg(ARM::R4, RegState::Kill) - .setMIFlags(MachineInstr::FrameSetup))); + BuildMI(MBB, MBBI, dl, TII.get(ARM::t2SUBrr), ARM::SP) + .addReg(ARM::SP, RegState::Kill) + .addReg(ARM::R4, RegState::Kill) + .setMIFlags(MachineInstr::FrameSetup) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); NumBytes = 0; } @@ -657,12 +711,14 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF, // -- out lower bits in r4 // mov sp, r4 // FIXME: It will be better just to find spare register here. - AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), ARM::R4) - .addReg(ARM::SP, RegState::Kill)); + BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), ARM::R4) + .addReg(ARM::SP, RegState::Kill) + .add(predOps(ARMCC::AL)); emitAligningInstructions(MF, AFI, TII, MBB, MBBI, dl, ARM::R4, MaxAlign, false); - AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), ARM::SP) - .addReg(ARM::R4, RegState::Kill)); + BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), ARM::SP) + .addReg(ARM::R4, RegState::Kill) + .add(predOps(ARMCC::AL)); } AFI->setShouldRestoreSPFromFP(true); @@ -675,14 +731,14 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF, // FIXME: Clarify FrameSetup flags here. if (RegInfo->hasBasePointer(MF)) { if (isARM) - BuildMI(MBB, MBBI, dl, - TII.get(ARM::MOVr), RegInfo->getBaseRegister()) - .addReg(ARM::SP) - .addImm((unsigned)ARMCC::AL).addReg(0).addReg(0); + BuildMI(MBB, MBBI, dl, TII.get(ARM::MOVr), RegInfo->getBaseRegister()) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); else - AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), - RegInfo->getBaseRegister()) - .addReg(ARM::SP)); + BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), RegInfo->getBaseRegister()) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)); } // If the frame has variable sized objects then the epilogue must restore @@ -757,19 +813,21 @@ void ARMFrameLowering::emitEpilogue(MachineFunction &MF, "No scratch register to restore SP from FP!"); emitT2RegPlusImmediate(MBB, MBBI, dl, ARM::R4, FramePtr, -NumBytes, ARMCC::AL, 0, TII); - AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), - ARM::SP) - .addReg(ARM::R4)); + BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), ARM::SP) + .addReg(ARM::R4) + .add(predOps(ARMCC::AL)); } } else { // Thumb2 or ARM. if (isARM) BuildMI(MBB, MBBI, dl, TII.get(ARM::MOVr), ARM::SP) - .addReg(FramePtr).addImm((unsigned)ARMCC::AL).addReg(0).addReg(0); + .addReg(FramePtr) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); else - AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), - ARM::SP) - .addReg(FramePtr)); + BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), ARM::SP) + .addReg(FramePtr) + .add(predOps(ARMCC::AL)); } } else if (NumBytes && !tryFoldSPUpdateIntoPushPop(STI, MF, &*MBBI, NumBytes)) @@ -829,7 +887,7 @@ ARMFrameLowering::ResolveFrameIndexReference(const MachineFunction &MF, // When dynamically realigning the stack, use the frame pointer for // parameters, and the stack/base pointer for locals. if (RegInfo->needsStackRealignment(MF)) { - assert (hasFP(MF) && "dynamic stack realignment without a FP!"); + assert(hasFP(MF) && "dynamic stack realignment without a FP!"); if (isFixed) { FrameReg = RegInfo->getFrameRegister(MF); Offset = FPOffset; @@ -910,8 +968,9 @@ void ARMFrameLowering::emitPushInst(MachineBasicBlock &MBB, if (Reg >= ARM::D8 && Reg < ARM::D8 + NumAlignedDPRCS2Regs) continue; - bool isLiveIn = MF.getRegInfo().isLiveIn(Reg); - if (!isLiveIn) + const MachineRegisterInfo &MRI = MF.getRegInfo(); + bool isLiveIn = MRI.isLiveIn(Reg); + if (!isLiveIn && !MRI.isReserved(Reg)) MBB.addLiveIn(Reg); // If NoGap is true, push consecutive registers and then leave the rest // for other instructions. e.g. @@ -936,18 +995,19 @@ void ARMFrameLowering::emitPushInst(MachineBasicBlock &MBB, }); if (Regs.size() > 1 || StrOpc== 0) { - MachineInstrBuilder MIB = - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(StmOpc), ARM::SP) - .addReg(ARM::SP).setMIFlags(MIFlags)); + MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, TII.get(StmOpc), ARM::SP) + .addReg(ARM::SP) + .setMIFlags(MIFlags) + .add(predOps(ARMCC::AL)); for (unsigned i = 0, e = Regs.size(); i < e; ++i) MIB.addReg(Regs[i].first, getKillRegState(Regs[i].second)); } else if (Regs.size() == 1) { - MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, TII.get(StrOpc), - ARM::SP) - .addReg(Regs[0].first, getKillRegState(Regs[0].second)) - .addReg(ARM::SP).setMIFlags(MIFlags) - .addImm(-4); - AddDefaultPred(MIB); + BuildMI(MBB, MI, DL, TII.get(StrOpc), ARM::SP) + .addReg(Regs[0].first, getKillRegState(Regs[0].second)) + .addReg(ARM::SP) + .setMIFlags(MIFlags) + .addImm(-4) + .add(predOps(ARMCC::AL)); } Regs.clear(); @@ -1027,9 +1087,9 @@ void ARMFrameLowering::emitPopInst(MachineBasicBlock &MBB, }); if (Regs.size() > 1 || LdrOpc == 0) { - MachineInstrBuilder MIB = - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(LdmOpc), ARM::SP) - .addReg(ARM::SP)); + MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, TII.get(LdmOpc), ARM::SP) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)); for (unsigned i = 0, e = Regs.size(); i < e; ++i) MIB.addReg(Regs[i], getDefRegState(true)); if (DeleteRet && MI != MBB.end()) { @@ -1053,7 +1113,7 @@ void ARMFrameLowering::emitPopInst(MachineBasicBlock &MBB, MIB.addImm(ARM_AM::getAM2Opc(ARM_AM::add, 4, ARM_AM::no_shift)); } else MIB.addImm(4); - AddDefaultPred(MIB); + MIB.add(predOps(ARMCC::AL)); } Regs.clear(); @@ -1114,9 +1174,11 @@ static void emitAlignedDPRCS2Spills(MachineBasicBlock &MBB, // sub r4, sp, #numregs * 8 // The immediate is <= 64, so it doesn't need any special encoding. unsigned Opc = isThumb ? ARM::t2SUBri : ARM::SUBri; - AddDefaultCC(AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(Opc), ARM::R4) - .addReg(ARM::SP) - .addImm(8 * NumAlignedDPRCS2Regs))); + BuildMI(MBB, MI, DL, TII.get(Opc), ARM::R4) + .addReg(ARM::SP) + .addImm(8 * NumAlignedDPRCS2Regs) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); unsigned MaxAlign = MF.getFrameInfo().getMaxAlignment(); // We must set parameter MustBeSingleInstruction to true, since @@ -1132,10 +1194,10 @@ static void emitAlignedDPRCS2Spills(MachineBasicBlock &MBB, // Leave r4 live, it is used below. Opc = isThumb ? ARM::tMOVr : ARM::MOVr; MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, TII.get(Opc), ARM::SP) - .addReg(ARM::R4); - MIB = AddDefaultPred(MIB); + .addReg(ARM::R4) + .add(predOps(ARMCC::AL)); if (!isThumb) - AddDefaultCC(MIB); + MIB.add(condCodeOp()); // Now spill NumAlignedDPRCS2Regs registers starting from d8. // r4 holds the stack slot address. @@ -1147,11 +1209,12 @@ static void emitAlignedDPRCS2Spills(MachineBasicBlock &MBB, unsigned SupReg = TRI->getMatchingSuperReg(NextReg, ARM::dsub_0, &ARM::QQPRRegClass); MBB.addLiveIn(SupReg); - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VST1d64Qwb_fixed), - ARM::R4) - .addReg(ARM::R4, RegState::Kill).addImm(16) - .addReg(NextReg) - .addReg(SupReg, RegState::ImplicitKill)); + BuildMI(MBB, MI, DL, TII.get(ARM::VST1d64Qwb_fixed), ARM::R4) + .addReg(ARM::R4, RegState::Kill) + .addImm(16) + .addReg(NextReg) + .addReg(SupReg, RegState::ImplicitKill) + .add(predOps(ARMCC::AL)); NextReg += 4; NumAlignedDPRCS2Regs -= 4; } @@ -1165,9 +1228,12 @@ static void emitAlignedDPRCS2Spills(MachineBasicBlock &MBB, unsigned SupReg = TRI->getMatchingSuperReg(NextReg, ARM::dsub_0, &ARM::QQPRRegClass); MBB.addLiveIn(SupReg); - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VST1d64Q)) - .addReg(ARM::R4).addImm(16).addReg(NextReg) - .addReg(SupReg, RegState::ImplicitKill)); + BuildMI(MBB, MI, DL, TII.get(ARM::VST1d64Q)) + .addReg(ARM::R4) + .addImm(16) + .addReg(NextReg) + .addReg(SupReg, RegState::ImplicitKill) + .add(predOps(ARMCC::AL)); NextReg += 4; NumAlignedDPRCS2Regs -= 4; } @@ -1177,8 +1243,11 @@ static void emitAlignedDPRCS2Spills(MachineBasicBlock &MBB, unsigned SupReg = TRI->getMatchingSuperReg(NextReg, ARM::dsub_0, &ARM::QPRRegClass); MBB.addLiveIn(SupReg); - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VST1q64)) - .addReg(ARM::R4).addImm(16).addReg(SupReg)); + BuildMI(MBB, MI, DL, TII.get(ARM::VST1q64)) + .addReg(ARM::R4) + .addImm(16) + .addReg(SupReg) + .add(predOps(ARMCC::AL)); NextReg += 2; NumAlignedDPRCS2Regs -= 2; } @@ -1187,9 +1256,11 @@ static void emitAlignedDPRCS2Spills(MachineBasicBlock &MBB, if (NumAlignedDPRCS2Regs) { MBB.addLiveIn(NextReg); // vstr.64 uses addrmode5 which has an offset scale of 4. - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VSTRD)) - .addReg(NextReg) - .addReg(ARM::R4).addImm((NextReg-R4BaseReg)*2)); + BuildMI(MBB, MI, DL, TII.get(ARM::VSTRD)) + .addReg(NextReg) + .addReg(ARM::R4) + .addImm((NextReg - R4BaseReg) * 2) + .add(predOps(ARMCC::AL)); } // The last spill instruction inserted should kill the scratch register r4. @@ -1254,8 +1325,11 @@ static void emitAlignedDPRCS2Restores(MachineBasicBlock &MBB, assert(!AFI->isThumb1OnlyFunction() && "Can't realign stack for thumb1"); unsigned Opc = isThumb ? ARM::t2ADDri : ARM::ADDri; - AddDefaultCC(AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(Opc), ARM::R4) - .addFrameIndex(D8SpillFI).addImm(0))); + BuildMI(MBB, MI, DL, TII.get(Opc), ARM::R4) + .addFrameIndex(D8SpillFI) + .addImm(0) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); // Now restore NumAlignedDPRCS2Regs registers starting from d8. unsigned NextReg = ARM::D8; @@ -1264,10 +1338,12 @@ static void emitAlignedDPRCS2Restores(MachineBasicBlock &MBB, if (NumAlignedDPRCS2Regs >= 6) { unsigned SupReg = TRI->getMatchingSuperReg(NextReg, ARM::dsub_0, &ARM::QQPRRegClass); - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VLD1d64Qwb_fixed), NextReg) - .addReg(ARM::R4, RegState::Define) - .addReg(ARM::R4, RegState::Kill).addImm(16) - .addReg(SupReg, RegState::ImplicitDefine)); + BuildMI(MBB, MI, DL, TII.get(ARM::VLD1d64Qwb_fixed), NextReg) + .addReg(ARM::R4, RegState::Define) + .addReg(ARM::R4, RegState::Kill) + .addImm(16) + .addReg(SupReg, RegState::ImplicitDefine) + .add(predOps(ARMCC::AL)); NextReg += 4; NumAlignedDPRCS2Regs -= 4; } @@ -1280,9 +1356,11 @@ static void emitAlignedDPRCS2Restores(MachineBasicBlock &MBB, if (NumAlignedDPRCS2Regs >= 4) { unsigned SupReg = TRI->getMatchingSuperReg(NextReg, ARM::dsub_0, &ARM::QQPRRegClass); - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VLD1d64Q), NextReg) - .addReg(ARM::R4).addImm(16) - .addReg(SupReg, RegState::ImplicitDefine)); + BuildMI(MBB, MI, DL, TII.get(ARM::VLD1d64Q), NextReg) + .addReg(ARM::R4) + .addImm(16) + .addReg(SupReg, RegState::ImplicitDefine) + .add(predOps(ARMCC::AL)); NextReg += 4; NumAlignedDPRCS2Regs -= 4; } @@ -1291,16 +1369,20 @@ static void emitAlignedDPRCS2Restores(MachineBasicBlock &MBB, if (NumAlignedDPRCS2Regs >= 2) { unsigned SupReg = TRI->getMatchingSuperReg(NextReg, ARM::dsub_0, &ARM::QPRRegClass); - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VLD1q64), SupReg) - .addReg(ARM::R4).addImm(16)); + BuildMI(MBB, MI, DL, TII.get(ARM::VLD1q64), SupReg) + .addReg(ARM::R4) + .addImm(16) + .add(predOps(ARMCC::AL)); NextReg += 2; NumAlignedDPRCS2Regs -= 2; } // Finally, use a vanilla vldr.64 for the remaining odd register. if (NumAlignedDPRCS2Regs) - AddDefaultPred(BuildMI(MBB, MI, DL, TII.get(ARM::VLDRD), NextReg) - .addReg(ARM::R4).addImm(2*(NextReg-R4BaseReg))); + BuildMI(MBB, MI, DL, TII.get(ARM::VLDRD), NextReg) + .addReg(ARM::R4) + .addImm(2 * (NextReg - R4BaseReg)) + .add(predOps(ARMCC::AL)); // Last store kills r4. std::prev(MI)->addRegisterKilled(ARM::R4, TRI); @@ -1633,24 +1715,38 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, // worth the effort and added fragility? unsigned EstimatedStackSize = MFI.estimateStackSize(MF) + 4 * (NumGPRSpills + NumFPRSpills); - if (hasFP(MF)) { + + // Determine biggest (positive) SP offset in MachineFrameInfo. + int MaxFixedOffset = 0; + for (int I = MFI.getObjectIndexBegin(); I < 0; ++I) { + int MaxObjectOffset = MFI.getObjectOffset(I) + MFI.getObjectSize(I); + MaxFixedOffset = std::max(MaxFixedOffset, MaxObjectOffset); + } + + bool HasFP = hasFP(MF); + if (HasFP) { if (AFI->hasStackFrame()) EstimatedStackSize += 4; } else { // If FP is not used, SP will be used to access arguments, so count the // size of arguments into the estimation. - EstimatedStackSize += MF.getInfo<ARMFunctionInfo>()->getArgumentStackSize(); + EstimatedStackSize += MaxFixedOffset; } EstimatedStackSize += 16; // For possible paddings. - bool BigStack = EstimatedStackSize >= estimateRSStackSizeLimit(MF, this) || - MFI.hasVarSizedObjects() || - (MFI.adjustsStack() && !canSimplifyCallFramePseudos(MF)); + unsigned EstimatedRSStackSizeLimit = estimateRSStackSizeLimit(MF, this); + int MaxFPOffset = getMaxFPOffset(*MF.getFunction(), *AFI); + bool BigFrameOffsets = EstimatedStackSize >= EstimatedRSStackSizeLimit || + MFI.hasVarSizedObjects() || + (MFI.adjustsStack() && !canSimplifyCallFramePseudos(MF)) || + // For large argument stacks fp relative addressed may overflow. + (HasFP && (MaxFixedOffset - MaxFPOffset) >= (int)EstimatedRSStackSizeLimit); bool ExtraCSSpill = false; - if (BigStack || !CanEliminateFrame || RegInfo->cannotEliminateFrame(MF)) { + if (BigFrameOffsets || + !CanEliminateFrame || RegInfo->cannotEliminateFrame(MF)) { AFI->setHasStackFrame(true); - if (hasFP(MF)) { + if (HasFP) { SavedRegs.set(FramePtr); // If the frame pointer is required by the ABI, also spill LR so that we // emit a complete frame record. @@ -1658,11 +1754,11 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, SavedRegs.set(ARM::LR); LRSpilled = true; NumGPRSpills++; - auto LRPos = find(UnspilledCS1GPRs, ARM::LR); + auto LRPos = llvm::find(UnspilledCS1GPRs, ARM::LR); if (LRPos != UnspilledCS1GPRs.end()) UnspilledCS1GPRs.erase(LRPos); } - auto FPPos = find(UnspilledCS1GPRs, FramePtr); + auto FPPos = llvm::find(UnspilledCS1GPRs, FramePtr); if (FPPos != UnspilledCS1GPRs.end()) UnspilledCS1GPRs.erase(FPPos); NumGPRSpills++; @@ -1721,7 +1817,7 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, } // r7 can be used if it is not being used as the frame pointer. - if (!hasFP(MF)) { + if (!HasFP) { if (SavedRegs.test(ARM::R7)) { --RegDeficit; DEBUG(dbgs() << "%R7 is saved low register, RegDeficit = " @@ -1773,7 +1869,7 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, NumGPRSpills++; CS1Spilled = true; ExtraCSSpill = true; - UnspilledCS1GPRs.erase(find(UnspilledCS1GPRs, Reg)); + UnspilledCS1GPRs.erase(llvm::find(UnspilledCS1GPRs, Reg)); if (Reg == ARM::LR) LRSpilled = true; } @@ -1786,7 +1882,7 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, SavedRegs.set(ARM::LR); NumGPRSpills++; SmallVectorImpl<unsigned>::iterator LRPos; - LRPos = find(UnspilledCS1GPRs, (unsigned)ARM::LR); + LRPos = llvm::find(UnspilledCS1GPRs, (unsigned)ARM::LR); if (LRPos != UnspilledCS1GPRs.end()) UnspilledCS1GPRs.erase(LRPos); @@ -1831,7 +1927,7 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, // callee-saved register or reserve a special spill slot to facilitate // register scavenging. Thumb1 needs a spill slot for stack pointer // adjustments also, even when the frame itself is small. - if (BigStack && !ExtraCSSpill) { + if (BigFrameOffsets && !ExtraCSSpill) { // If any non-reserved CS register isn't spilled, just spill one or two // extra. That should take care of it! unsigned NumExtras = TargetAlign / 4; @@ -1865,10 +1961,10 @@ void ARMFrameLowering::determineCalleeSaves(MachineFunction &MF, // note: Thumb1 functions spill to R12, not the stack. Reserve a slot // closest to SP or frame pointer. assert(RS && "Register scavenging not provided"); - const TargetRegisterClass *RC = &ARM::GPRRegClass; - RS->addScavengingFrameIndex(MFI.CreateStackObject(RC->getSize(), - RC->getAlignment(), - false)); + const TargetRegisterClass &RC = ARM::GPRRegClass; + unsigned Size = TRI->getSpillSize(RC); + unsigned Align = TRI->getSpillAlignment(RC); + RS->addScavengingFrameIndex(MFI.CreateStackObject(Size, Align, false)); } } } @@ -1890,7 +1986,7 @@ MachineBasicBlock::iterator ARMFrameLowering::eliminateCallFramePseudoInstr( // ADJCALLSTACKUP -> add, sp, sp, amount MachineInstr &Old = *I; DebugLoc dl = Old.getDebugLoc(); - unsigned Amount = Old.getOperand(0).getImm(); + unsigned Amount = TII.getFrameSize(Old); 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 @@ -1908,14 +2004,11 @@ MachineBasicBlock::iterator ARMFrameLowering::eliminateCallFramePseudoInstr( ARMCC::CondCodes Pred = (PIdx == -1) ? ARMCC::AL : (ARMCC::CondCodes)Old.getOperand(PIdx).getImm(); + unsigned PredReg = TII.getFramePred(Old); if (Opc == ARM::ADJCALLSTACKDOWN || Opc == ARM::tADJCALLSTACKDOWN) { - // Note: PredReg is operand 2 for ADJCALLSTACKDOWN. - unsigned PredReg = Old.getOperand(2).getReg(); emitSPUpdate(isARM, MBB, I, dl, TII, -Amount, MachineInstr::NoFlags, Pred, PredReg); } else { - // Note: PredReg is operand 3 for ADJCALLSTACKUP. - unsigned PredReg = Old.getOperand(3).getReg(); assert(Opc == ARM::ADJCALLSTACKUP || Opc == ARM::tADJCALLSTACKUP); emitSPUpdate(isARM, MBB, I, dl, TII, Amount, MachineInstr::NoFlags, Pred, PredReg); @@ -2081,12 +2174,17 @@ void ARMFrameLowering::adjustForSegmentedStacks( // SR1: Scratch Register #1 // push {SR0, SR1} if (Thumb) { - AddDefaultPred(BuildMI(PrevStackMBB, DL, TII.get(ARM::tPUSH))) - .addReg(ScratchReg0).addReg(ScratchReg1); + BuildMI(PrevStackMBB, DL, TII.get(ARM::tPUSH)) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0) + .addReg(ScratchReg1); } else { - AddDefaultPred(BuildMI(PrevStackMBB, DL, TII.get(ARM::STMDB_UPD)) - .addReg(ARM::SP, RegState::Define).addReg(ARM::SP)) - .addReg(ScratchReg0).addReg(ScratchReg1); + BuildMI(PrevStackMBB, DL, TII.get(ARM::STMDB_UPD)) + .addReg(ARM::SP, RegState::Define) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0) + .addReg(ScratchReg1); } // Emit the relevant DWARF information about the change in stack pointer as @@ -2106,21 +2204,29 @@ void ARMFrameLowering::adjustForSegmentedStacks( // mov SR1, sp if (Thumb) { - AddDefaultPred(BuildMI(McrMBB, DL, TII.get(ARM::tMOVr), ScratchReg1) - .addReg(ARM::SP)); + BuildMI(McrMBB, DL, TII.get(ARM::tMOVr), ScratchReg1) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)); } else if (CompareStackPointer) { - AddDefaultPred(BuildMI(McrMBB, DL, TII.get(ARM::MOVr), ScratchReg1) - .addReg(ARM::SP)).addReg(0); + BuildMI(McrMBB, DL, TII.get(ARM::MOVr), ScratchReg1) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); } // sub SR1, sp, #StackSize if (!CompareStackPointer && Thumb) { - AddDefaultPred( - AddDefaultCC(BuildMI(McrMBB, DL, TII.get(ARM::tSUBi8), ScratchReg1)) - .addReg(ScratchReg1).addImm(AlignedStackSize)); + BuildMI(McrMBB, DL, TII.get(ARM::tSUBi8), ScratchReg1) + .add(condCodeOp()) + .addReg(ScratchReg1) + .addImm(AlignedStackSize) + .add(predOps(ARMCC::AL)); } else if (!CompareStackPointer) { - AddDefaultPred(BuildMI(McrMBB, DL, TII.get(ARM::SUBri), ScratchReg1) - .addReg(ARM::SP).addImm(AlignedStackSize)).addReg(0); + BuildMI(McrMBB, DL, TII.get(ARM::SUBri), ScratchReg1) + .addReg(ARM::SP) + .addImm(AlignedStackSize) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); } if (Thumb && ST->isThumb1Only()) { @@ -2131,21 +2237,25 @@ void ARMFrameLowering::adjustForSegmentedStacks( unsigned CPI = MCP->getConstantPoolIndex(NewCPV, 4); // ldr SR0, [pc, offset(STACK_LIMIT)] - AddDefaultPred(BuildMI(GetMBB, DL, TII.get(ARM::tLDRpci), ScratchReg0) - .addConstantPoolIndex(CPI)); + BuildMI(GetMBB, DL, TII.get(ARM::tLDRpci), ScratchReg0) + .addConstantPoolIndex(CPI) + .add(predOps(ARMCC::AL)); // ldr SR0, [SR0] - AddDefaultPred(BuildMI(GetMBB, DL, TII.get(ARM::tLDRi), ScratchReg0) - .addReg(ScratchReg0).addImm(0)); + BuildMI(GetMBB, DL, TII.get(ARM::tLDRi), ScratchReg0) + .addReg(ScratchReg0) + .addImm(0) + .add(predOps(ARMCC::AL)); } else { // Get TLS base address from the coprocessor // mrc p15, #0, SR0, c13, c0, #3 - AddDefaultPred(BuildMI(McrMBB, DL, TII.get(ARM::MRC), ScratchReg0) - .addImm(15) - .addImm(0) - .addImm(13) - .addImm(0) - .addImm(3)); + BuildMI(McrMBB, DL, TII.get(ARM::MRC), ScratchReg0) + .addImm(15) + .addImm(0) + .addImm(13) + .addImm(0) + .addImm(3) + .add(predOps(ARMCC::AL)); // Use the last tls slot on android and a private field of the TCP on linux. assert(ST->isTargetAndroid() || ST->isTargetLinux()); @@ -2153,16 +2263,19 @@ void ARMFrameLowering::adjustForSegmentedStacks( // Get the stack limit from the right offset // ldr SR0, [sr0, #4 * TlsOffset] - AddDefaultPred(BuildMI(GetMBB, DL, TII.get(ARM::LDRi12), ScratchReg0) - .addReg(ScratchReg0).addImm(4 * TlsOffset)); + BuildMI(GetMBB, DL, TII.get(ARM::LDRi12), ScratchReg0) + .addReg(ScratchReg0) + .addImm(4 * TlsOffset) + .add(predOps(ARMCC::AL)); } // Compare stack limit with stack size requested. // cmp SR0, SR1 Opcode = Thumb ? ARM::tCMPr : ARM::CMPrr; - AddDefaultPred(BuildMI(GetMBB, DL, TII.get(Opcode)) - .addReg(ScratchReg0) - .addReg(ScratchReg1)); + BuildMI(GetMBB, DL, TII.get(Opcode)) + .addReg(ScratchReg0) + .addReg(ScratchReg1) + .add(predOps(ARMCC::AL)); // This jump is taken if StackLimit < SP - stack required. Opcode = Thumb ? ARM::tBcc : ARM::Bcc; @@ -2178,32 +2291,40 @@ void ARMFrameLowering::adjustForSegmentedStacks( // Pass first argument for the __morestack by Scratch Register #0. // The amount size of stack required if (Thumb) { - AddDefaultPred(AddDefaultCC(BuildMI(AllocMBB, DL, TII.get(ARM::tMOVi8), - ScratchReg0)).addImm(AlignedStackSize)); + BuildMI(AllocMBB, DL, TII.get(ARM::tMOVi8), ScratchReg0) + .add(condCodeOp()) + .addImm(AlignedStackSize) + .add(predOps(ARMCC::AL)); } else { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::MOVi), ScratchReg0) - .addImm(AlignedStackSize)).addReg(0); + BuildMI(AllocMBB, DL, TII.get(ARM::MOVi), ScratchReg0) + .addImm(AlignedStackSize) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); } // Pass second argument for the __morestack by Scratch Register #1. // The amount size of stack consumed to save function arguments. if (Thumb) { - AddDefaultPred( - AddDefaultCC(BuildMI(AllocMBB, DL, TII.get(ARM::tMOVi8), ScratchReg1)) - .addImm(alignToARMConstant(ARMFI->getArgumentStackSize()))); + BuildMI(AllocMBB, DL, TII.get(ARM::tMOVi8), ScratchReg1) + .add(condCodeOp()) + .addImm(alignToARMConstant(ARMFI->getArgumentStackSize())) + .add(predOps(ARMCC::AL)); } else { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::MOVi), ScratchReg1) - .addImm(alignToARMConstant(ARMFI->getArgumentStackSize()))) - .addReg(0); + BuildMI(AllocMBB, DL, TII.get(ARM::MOVi), ScratchReg1) + .addImm(alignToARMConstant(ARMFI->getArgumentStackSize())) + .add(predOps(ARMCC::AL)) + .add(condCodeOp()); } // push {lr} - Save return address of this function. if (Thumb) { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::tPUSH))) + BuildMI(AllocMBB, DL, TII.get(ARM::tPUSH)) + .add(predOps(ARMCC::AL)) .addReg(ARM::LR); } else { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::STMDB_UPD)) - .addReg(ARM::SP, RegState::Define) - .addReg(ARM::SP)) + BuildMI(AllocMBB, DL, TII.get(ARM::STMDB_UPD)) + .addReg(ARM::SP, RegState::Define) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) .addReg(ARM::LR); } @@ -2220,7 +2341,8 @@ void ARMFrameLowering::adjustForSegmentedStacks( // Call __morestack(). if (Thumb) { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::tBL))) + BuildMI(AllocMBB, DL, TII.get(ARM::tBL)) + .add(predOps(ARMCC::AL)) .addExternalSymbol("__morestack"); } else { BuildMI(AllocMBB, DL, TII.get(ARM::BL)) @@ -2230,22 +2352,26 @@ void ARMFrameLowering::adjustForSegmentedStacks( // pop {lr} - Restore return address of this original function. if (Thumb) { if (ST->isThumb1Only()) { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::tPOP))) - .addReg(ScratchReg0); - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::tMOVr), ARM::LR) - .addReg(ScratchReg0)); + BuildMI(AllocMBB, DL, TII.get(ARM::tPOP)) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0); + BuildMI(AllocMBB, DL, TII.get(ARM::tMOVr), ARM::LR) + .addReg(ScratchReg0) + .add(predOps(ARMCC::AL)); } else { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::t2LDR_POST)) - .addReg(ARM::LR, RegState::Define) - .addReg(ARM::SP, RegState::Define) - .addReg(ARM::SP) - .addImm(4)); + BuildMI(AllocMBB, DL, TII.get(ARM::t2LDR_POST)) + .addReg(ARM::LR, RegState::Define) + .addReg(ARM::SP, RegState::Define) + .addReg(ARM::SP) + .addImm(4) + .add(predOps(ARMCC::AL)); } } else { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::LDMIA_UPD)) - .addReg(ARM::SP, RegState::Define) - .addReg(ARM::SP)) - .addReg(ARM::LR); + BuildMI(AllocMBB, DL, TII.get(ARM::LDMIA_UPD)) + .addReg(ARM::SP, RegState::Define) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) + .addReg(ARM::LR); } // Restore SR0 and SR1 in case of __morestack() was called. @@ -2253,15 +2379,17 @@ void ARMFrameLowering::adjustForSegmentedStacks( // scratch registers from here. // pop {SR0, SR1} if (Thumb) { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::tPOP))) - .addReg(ScratchReg0) - .addReg(ScratchReg1); + BuildMI(AllocMBB, DL, TII.get(ARM::tPOP)) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0) + .addReg(ScratchReg1); } else { - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(ARM::LDMIA_UPD)) - .addReg(ARM::SP, RegState::Define) - .addReg(ARM::SP)) - .addReg(ScratchReg0) - .addReg(ScratchReg1); + BuildMI(AllocMBB, DL, TII.get(ARM::LDMIA_UPD)) + .addReg(ARM::SP, RegState::Define) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0) + .addReg(ScratchReg1); } // Update the CFA offset now that we've popped @@ -2271,20 +2399,22 @@ void ARMFrameLowering::adjustForSegmentedStacks( // bx lr - Return from this function. Opcode = Thumb ? ARM::tBX_RET : ARM::BX_RET; - AddDefaultPred(BuildMI(AllocMBB, DL, TII.get(Opcode))); + BuildMI(AllocMBB, DL, TII.get(Opcode)).add(predOps(ARMCC::AL)); // Restore SR0 and SR1 in case of __morestack() was not called. // pop {SR0, SR1} if (Thumb) { - AddDefaultPred(BuildMI(PostStackMBB, DL, TII.get(ARM::tPOP))) - .addReg(ScratchReg0) - .addReg(ScratchReg1); + BuildMI(PostStackMBB, DL, TII.get(ARM::tPOP)) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0) + .addReg(ScratchReg1); } else { - AddDefaultPred(BuildMI(PostStackMBB, DL, TII.get(ARM::LDMIA_UPD)) - .addReg(ARM::SP, RegState::Define) - .addReg(ARM::SP)) - .addReg(ScratchReg0) - .addReg(ScratchReg1); + BuildMI(PostStackMBB, DL, TII.get(ARM::LDMIA_UPD)) + .addReg(ARM::SP, RegState::Define) + .addReg(ARM::SP) + .add(predOps(ARMCC::AL)) + .addReg(ScratchReg0) + .addReg(ScratchReg1); } // Update the CFA offset now that we've popped |
