diff options
Diffstat (limited to 'lib/Target/ARC/ARCFrameLowering.cpp')
| -rw-r--r-- | lib/Target/ARC/ARCFrameLowering.cpp | 59 |
1 files changed, 44 insertions, 15 deletions
diff --git a/lib/Target/ARC/ARCFrameLowering.cpp b/lib/Target/ARC/ARCFrameLowering.cpp index ca59cb2baaa7..d8946d97deff 100644 --- a/lib/Target/ARC/ARCFrameLowering.cpp +++ b/lib/Target/ARC/ARCFrameLowering.cpp @@ -1,9 +1,8 @@ //===- ARCFrameLowering.cpp - ARC Frame Information -------------*- C++ -*-===// // -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // @@ -65,6 +64,8 @@ static void generateStackAdjustment(MachineBasicBlock &MBB, assert((AbsAmount % 4 == 0) && "Stack adjustments must be 4-byte aligned."); if (isUInt<6>(AbsAmount)) AdjOp = Positive ? ARC::ADD_rru6 : ARC::SUB_rru6; + else if (isInt<12>(AbsAmount)) + AdjOp = Positive ? ARC::ADD_rrs12 : ARC::SUB_rrs12; else AdjOp = Positive ? ARC::ADD_rrlimm : ARC::SUB_rrlimm; @@ -134,8 +135,12 @@ void ARCFrameLowering::emitPrologue(MachineFunction &MF, // Add in the varargs area here first. LLVM_DEBUG(dbgs() << "Varargs\n"); unsigned VarArgsBytes = MFI.getObjectSize(AFI->getVarArgsFrameIndex()); - BuildMI(MBB, MBBI, dl, TII->get(ARC::SUB_rru6)) - .addReg(ARC::SP) + unsigned Opc = ARC::SUB_rrlimm; + if (isUInt<6>(VarArgsBytes)) + Opc = ARC::SUB_rru6; + else if (isInt<12>(VarArgsBytes)) + Opc = ARC::SUB_rrs12; + BuildMI(MBB, MBBI, dl, TII->get(Opc), ARC::SP) .addReg(ARC::SP) .addImm(VarArgsBytes); } @@ -247,7 +252,10 @@ void ARCFrameLowering::emitEpilogue(MachineFunction &MF, // Then, replace the frame pointer by (new) [sp,StackSize-4]. // Then, move the stack pointer the rest of the way (sp = sp + StackSize). if (hasFP(MF)) { - BuildMI(MBB, MBBI, DebugLoc(), TII->get(ARC::SUB_rru6), ARC::SP) + unsigned Opc = ARC::SUB_rrlimm; + if (isUInt<6>(StackSize)) + Opc = ARC::SUB_rru6; + BuildMI(MBB, MBBI, DebugLoc(), TII->get(Opc), ARC::SP) .addReg(ARC::FP) .addImm(StackSize); AmountAboveFunclet += 4; @@ -271,19 +279,28 @@ void ARCFrameLowering::emitEpilogue(MachineFunction &MF, } // Move the stack pointer up to the point of the funclet. - if (StackSize - AmountAboveFunclet) { - BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(ARC::ADD_rru6)) - .addReg(ARC::SP) + if (unsigned MoveAmount = StackSize - AmountAboveFunclet) { + unsigned Opc = ARC::ADD_rrlimm; + if (isUInt<6>(MoveAmount)) + Opc = ARC::ADD_rru6; + else if (isInt<12>(MoveAmount)) + Opc = ARC::ADD_rrs12; + BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(Opc), ARC::SP) .addReg(ARC::SP) .addImm(StackSize - AmountAboveFunclet); } if (StackSlotsUsedByFunclet) { + // This part of the adjustment will always be < 64 bytes. BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(ARC::BL)) .addExternalSymbol(load_funclet_name[Last - ARC::R15]) .addReg(ARC::BLINK, RegState::Implicit | RegState::Kill); - BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(ARC::ADD_rru6)) - .addReg(ARC::SP) + unsigned Opc = ARC::ADD_rrlimm; + if (isUInt<6>(4 * StackSlotsUsedByFunclet)) + Opc = ARC::ADD_rru6; + else if (isInt<12>(4 * StackSlotsUsedByFunclet)) + Opc = ARC::ADD_rrs12; + BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(Opc), ARC::SP) .addReg(ARC::SP) .addImm(4 * (StackSlotsUsedByFunclet)); } @@ -294,8 +311,8 @@ void ARCFrameLowering::emitEpilogue(MachineFunction &MF, // Now, pop fp if necessary. if (hasFP(MF)) { BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(ARC::LD_AB_rs9)) - .addReg(ARC::SP, RegState::Define) .addReg(ARC::FP, RegState::Define) + .addReg(ARC::SP, RegState::Define) .addReg(ARC::SP) .addImm(4); } @@ -305,7 +322,12 @@ void ARCFrameLowering::emitEpilogue(MachineFunction &MF, // Add in the varargs area here first. LLVM_DEBUG(dbgs() << "Varargs\n"); unsigned VarArgsBytes = MFI.getObjectSize(AFI->getVarArgsFrameIndex()); - BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(ARC::ADD_rru6)) + unsigned Opc = ARC::ADD_rrlimm; + if (isUInt<6>(VarArgsBytes)) + Opc = ARC::ADD_rru6; + else if (isInt<12>(VarArgsBytes)) + Opc = ARC::ADD_rrs12; + BuildMI(MBB, MBBI, MBB.findDebugLoc(MBBI), TII->get(Opc)) .addReg(ARC::SP) .addReg(ARC::SP) .addImm(VarArgsBytes); @@ -431,7 +453,14 @@ static void emitRegUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, DebugLoc dl, unsigned Reg, int NumBytes, bool IsAdd, const ARCInstrInfo *TII) { - unsigned Opc = IsAdd ? ARC::ADD_rru6 : ARC::SUB_rru6; + unsigned Opc; + if (isUInt<6>(NumBytes)) + Opc = IsAdd ? ARC::ADD_rru6 : ARC::SUB_rru6; + else if (isInt<12>(NumBytes)) + Opc = IsAdd ? ARC::ADD_rrs12 : ARC::SUB_rrs12; + else + Opc = IsAdd ? ARC::ADD_rrlimm : ARC::SUB_rrlimm; + BuildMI(MBB, MBBI, dl, TII->get(Opc), Reg) .addReg(Reg, RegState::Kill) .addImm(NumBytes); |