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author | Dimitry Andric <dim@FreeBSD.org> | 2015-12-30 11:46:15 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2015-12-30 11:46:15 +0000 |
commit | dd58ef019b700900793a1eb48b52123db01b654e (patch) | |
tree | fcfbb4df56a744f4ddc6122c50521dd3f1c5e196 /lib/Target/Hexagon/HexagonRegisterInfo.cpp | |
parent | 2fe5752e3a7c345cdb59e869278d36af33c13fa4 (diff) | |
download | src-dd58ef019b700900793a1eb48b52123db01b654e.tar.gz src-dd58ef019b700900793a1eb48b52123db01b654e.zip |
Vendor import of llvm trunk r256633:
Notes
Notes:
svn path=/vendor/llvm/dist/; revision=292915
Diffstat (limited to 'lib/Target/Hexagon/HexagonRegisterInfo.cpp')
-rw-r--r-- | lib/Target/Hexagon/HexagonRegisterInfo.cpp | 94 |
1 files changed, 18 insertions, 76 deletions
diff --git a/lib/Target/Hexagon/HexagonRegisterInfo.cpp b/lib/Target/Hexagon/HexagonRegisterInfo.cpp index f6bb4a045438..61c0589fb5bf 100644 --- a/lib/Target/Hexagon/HexagonRegisterInfo.cpp +++ b/lib/Target/Hexagon/HexagonRegisterInfo.cpp @@ -66,6 +66,8 @@ HexagonRegisterInfo::getCallerSavedRegs(const MachineFunction *MF) const { switch (HST.getHexagonArchVersion()) { case HexagonSubtarget::V4: case HexagonSubtarget::V5: + case HexagonSubtarget::V55: + case HexagonSubtarget::V60: return CallerSavedRegsV4; } llvm_unreachable( @@ -84,6 +86,8 @@ HexagonRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { switch (MF->getSubtarget<HexagonSubtarget>().getHexagonArchVersion()) { case HexagonSubtarget::V4: case HexagonSubtarget::V5: + case HexagonSubtarget::V55: + case HexagonSubtarget::V60: return CalleeSavedRegsV3; } llvm_unreachable("Callee saved registers requested for unknown architecture " @@ -98,7 +102,7 @@ BitVector HexagonRegisterInfo::getReservedRegs(const MachineFunction &MF) Reserved.set(Hexagon::R29); Reserved.set(Hexagon::R30); Reserved.set(Hexagon::R31); - Reserved.set(Hexagon::D14); + Reserved.set(Hexagon::PC); Reserved.set(Hexagon::D15); Reserved.set(Hexagon::LC0); Reserved.set(Hexagon::LC1); @@ -116,62 +120,21 @@ void HexagonRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, assert(SPAdj == 0 && "Unexpected"); MachineInstr &MI = *II; - MachineBasicBlock &MB = *MI.getParent(); MachineFunction &MF = *MB.getParent(); - MachineFrameInfo &MFI = *MF.getFrameInfo(); - auto &HST = static_cast<const HexagonSubtarget&>(MF.getSubtarget()); + auto &HST = MF.getSubtarget<HexagonSubtarget>(); auto &HII = *HST.getInstrInfo(); auto &HFI = *HST.getFrameLowering(); + unsigned BP = 0; int FI = MI.getOperand(FIOp).getIndex(); - int Offset = MFI.getObjectOffset(FI) + MI.getOperand(FIOp+1).getImm(); - bool HasAlloca = MFI.hasVarSizedObjects(); - bool HasAlign = needsStackRealignment(MF); - - // XXX: Fixed objects cannot be accessed through SP if there are aligned - // objects in the local frame, or if there are dynamically allocated objects. - // In such cases, there has to be FP available. - if (!HFI.hasFP(MF)) { - assert(!HasAlloca && !HasAlign && "This function must have frame pointer"); - // We will not reserve space on the stack for the lr and fp registers. - Offset -= 8; - } - - unsigned SP = getStackRegister(), FP = getFrameRegister(); - unsigned AP = 0; - if (MachineInstr *AI = HFI.getAlignaInstr(MF)) - AP = AI->getOperand(0).getReg(); - unsigned FrameSize = MFI.getStackSize(); - - // Special handling of dbg_value instructions and INLINEASM. - if (MI.isDebugValue() || MI.isInlineAsm()) { - MI.getOperand(FIOp).ChangeToRegister(SP, false /*isDef*/); - MI.getOperand(FIOp+1).ChangeToImmediate(Offset+FrameSize); - return; - } - - bool UseFP = false, UseAP = false; // Default: use SP. - if (MFI.isFixedObjectIndex(FI) || MFI.isObjectPreAllocated(FI)) { - UseFP = HasAlloca || HasAlign; - } else { - if (HasAlloca) { - if (HasAlign) - UseAP = true; - else - UseFP = true; - } - } + // Select the base pointer (BP) and calculate the actual offset from BP + // to the beginning of the object at index FI. + int Offset = HFI.getFrameIndexReference(MF, FI, BP); + // Add the offset from the instruction. + int RealOffset = Offset + MI.getOperand(FIOp+1).getImm(); unsigned Opc = MI.getOpcode(); - bool ValidSP = HII.isValidOffset(Opc, FrameSize+Offset); - bool ValidFP = HII.isValidOffset(Opc, Offset); - - // Calculate the actual offset in the instruction. - int64_t RealOffset = Offset; - if (!UseFP && !UseAP) - RealOffset = FrameSize+Offset; - switch (Opc) { case Hexagon::TFR_FIA: MI.setDesc(HII.get(Hexagon::A2_addi)); @@ -184,20 +147,7 @@ void HexagonRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, break; } - unsigned BP = 0; - bool Valid = false; - if (UseFP) { - BP = FP; - Valid = ValidFP; - } else if (UseAP) { - BP = AP; - Valid = ValidFP; - } else { - BP = SP; - Valid = ValidSP; - } - - if (Valid) { + if (HII.isValidOffset(Opc, RealOffset)) { MI.getOperand(FIOp).ChangeToRegister(BP, false); MI.getOperand(FIOp+1).ChangeToImmediate(RealOffset); return; @@ -223,8 +173,8 @@ unsigned HexagonRegisterInfo::getFrameRegister(const MachineFunction &MF) const { const HexagonFrameLowering *TFI = getFrameLowering(MF); if (TFI->hasFP(MF)) - return Hexagon::R30; - return Hexagon::R29; + return getFrameRegister(); + return getStackRegister(); } @@ -238,17 +188,9 @@ unsigned HexagonRegisterInfo::getStackRegister() const { } -bool -HexagonRegisterInfo::useFPForScavengingIndex(const MachineFunction &MF) const { - const HexagonFrameLowering *TFI = getFrameLowering(MF); - return TFI->hasFP(MF); -} - - -bool -HexagonRegisterInfo::needsStackRealignment(const MachineFunction &MF) const { - const MachineFrameInfo *MFI = MF.getFrameInfo(); - return MFI->getMaxAlignment() > 8; +bool HexagonRegisterInfo::useFPForScavengingIndex(const MachineFunction &MF) + const { + return MF.getSubtarget<HexagonSubtarget>().getFrameLowering()->hasFP(MF); } |