mirror of
https://github.com/c64scene-ar/llvm-6502.git
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3bf9125933
addresses a longstanding deficiency noted in many FIXMEs scattered across all the targets. This effectively moves the problem up one level, replacing eleven FIXMEs in the targets with eight FIXMEs in CodeGen, plus one path through FastISel where we actually supply a DebugLoc, fixing Radar 7421831. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106243 91177308-0d34-0410-b5e6-96231b3b80d8
261 lines
9.7 KiB
C++
261 lines
9.7 KiB
C++
//===- SparcInstrInfo.cpp - Sparc Instruction Information -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the Sparc implementation of the TargetInstrInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "SparcInstrInfo.h"
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#include "SparcSubtarget.h"
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#include "Sparc.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "SparcGenInstrInfo.inc"
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#include "SparcMachineFunctionInfo.h"
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using namespace llvm;
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SparcInstrInfo::SparcInstrInfo(SparcSubtarget &ST)
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: TargetInstrInfoImpl(SparcInsts, array_lengthof(SparcInsts)),
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RI(ST, *this), Subtarget(ST) {
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}
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static bool isZeroImm(const MachineOperand &op) {
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return op.isImm() && op.getImm() == 0;
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}
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/// Return true if the instruction is a register to register move and
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/// leave the source and dest operands in the passed parameters.
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///
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bool SparcInstrInfo::isMoveInstr(const MachineInstr &MI,
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unsigned &SrcReg, unsigned &DstReg,
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unsigned &SrcSR, unsigned &DstSR) const {
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SrcSR = DstSR = 0; // No sub-registers.
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// We look for 3 kinds of patterns here:
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// or with G0 or 0
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// add with G0 or 0
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// fmovs or FpMOVD (pseudo double move).
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if (MI.getOpcode() == SP::ORrr || MI.getOpcode() == SP::ADDrr) {
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if (MI.getOperand(1).getReg() == SP::G0) {
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DstReg = MI.getOperand(0).getReg();
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SrcReg = MI.getOperand(2).getReg();
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return true;
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} else if (MI.getOperand(2).getReg() == SP::G0) {
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DstReg = MI.getOperand(0).getReg();
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SrcReg = MI.getOperand(1).getReg();
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return true;
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}
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} else if ((MI.getOpcode() == SP::ORri || MI.getOpcode() == SP::ADDri) &&
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isZeroImm(MI.getOperand(2)) && MI.getOperand(1).isReg()) {
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DstReg = MI.getOperand(0).getReg();
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SrcReg = MI.getOperand(1).getReg();
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return true;
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} else if (MI.getOpcode() == SP::FMOVS || MI.getOpcode() == SP::FpMOVD ||
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MI.getOpcode() == SP::FMOVD) {
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SrcReg = MI.getOperand(1).getReg();
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DstReg = MI.getOperand(0).getReg();
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return true;
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}
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return false;
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}
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/// isLoadFromStackSlot - If the specified machine instruction is a direct
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/// load from a stack slot, return the virtual or physical register number of
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/// the destination along with the FrameIndex of the loaded stack slot. If
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/// not, return 0. This predicate must return 0 if the instruction has
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/// any side effects other than loading from the stack slot.
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unsigned SparcInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
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int &FrameIndex) const {
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if (MI->getOpcode() == SP::LDri ||
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MI->getOpcode() == SP::LDFri ||
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MI->getOpcode() == SP::LDDFri) {
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if (MI->getOperand(1).isFI() && MI->getOperand(2).isImm() &&
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MI->getOperand(2).getImm() == 0) {
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FrameIndex = MI->getOperand(1).getIndex();
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return MI->getOperand(0).getReg();
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}
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}
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return 0;
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}
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/// isStoreToStackSlot - If the specified machine instruction is a direct
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/// store to a stack slot, return the virtual or physical register number of
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/// the source reg along with the FrameIndex of the loaded stack slot. If
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/// not, return 0. This predicate must return 0 if the instruction has
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/// any side effects other than storing to the stack slot.
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unsigned SparcInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
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int &FrameIndex) const {
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if (MI->getOpcode() == SP::STri ||
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MI->getOpcode() == SP::STFri ||
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MI->getOpcode() == SP::STDFri) {
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if (MI->getOperand(0).isFI() && MI->getOperand(1).isImm() &&
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MI->getOperand(1).getImm() == 0) {
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FrameIndex = MI->getOperand(0).getIndex();
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return MI->getOperand(2).getReg();
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}
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}
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return 0;
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}
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unsigned
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SparcInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
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MachineBasicBlock *FBB,
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const SmallVectorImpl<MachineOperand> &Cond,
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DebugLoc DL)const{
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// Can only insert uncond branches so far.
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assert(Cond.empty() && !FBB && TBB && "Can only handle uncond branches!");
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BuildMI(&MBB, DL, get(SP::BA)).addMBB(TBB);
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return 1;
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}
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bool SparcInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I,
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unsigned DestReg, unsigned SrcReg,
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const TargetRegisterClass *DestRC,
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const TargetRegisterClass *SrcRC,
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DebugLoc DL) const {
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if (DestRC != SrcRC) {
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// Not yet supported!
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return false;
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}
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if (DestRC == SP::IntRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::ORrr), DestReg).addReg(SP::G0).addReg(SrcReg);
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else if (DestRC == SP::FPRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::FMOVS), DestReg).addReg(SrcReg);
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else if (DestRC == SP::DFPRegsRegisterClass)
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BuildMI(MBB, I, DL, get(Subtarget.isV9() ? SP::FMOVD : SP::FpMOVD),DestReg)
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.addReg(SrcReg);
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else
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// Can't copy this register
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return false;
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return true;
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}
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void SparcInstrInfo::
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storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
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unsigned SrcReg, bool isKill, int FI,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI) const {
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DebugLoc DL;
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if (I != MBB.end()) DL = I->getDebugLoc();
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// On the order of operands here: think "[FrameIdx + 0] = SrcReg".
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if (RC == SP::IntRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::STri)).addFrameIndex(FI).addImm(0)
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.addReg(SrcReg, getKillRegState(isKill));
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else if (RC == SP::FPRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::STFri)).addFrameIndex(FI).addImm(0)
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.addReg(SrcReg, getKillRegState(isKill));
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else if (RC == SP::DFPRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::STDFri)).addFrameIndex(FI).addImm(0)
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.addReg(SrcReg, getKillRegState(isKill));
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else
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llvm_unreachable("Can't store this register to stack slot");
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}
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void SparcInstrInfo::
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loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
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unsigned DestReg, int FI,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI) const {
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DebugLoc DL;
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if (I != MBB.end()) DL = I->getDebugLoc();
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if (RC == SP::IntRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::LDri), DestReg).addFrameIndex(FI).addImm(0);
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else if (RC == SP::FPRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::LDFri), DestReg).addFrameIndex(FI).addImm(0);
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else if (RC == SP::DFPRegsRegisterClass)
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BuildMI(MBB, I, DL, get(SP::LDDFri), DestReg).addFrameIndex(FI).addImm(0);
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else
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llvm_unreachable("Can't load this register from stack slot");
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}
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MachineInstr *SparcInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
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MachineInstr* MI,
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const SmallVectorImpl<unsigned> &Ops,
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int FI) const {
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if (Ops.size() != 1) return NULL;
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unsigned OpNum = Ops[0];
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bool isFloat = false;
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MachineInstr *NewMI = NULL;
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switch (MI->getOpcode()) {
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case SP::ORrr:
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if (MI->getOperand(1).isReg() && MI->getOperand(1).getReg() == SP::G0&&
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MI->getOperand(0).isReg() && MI->getOperand(2).isReg()) {
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if (OpNum == 0) // COPY -> STORE
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NewMI = BuildMI(MF, MI->getDebugLoc(), get(SP::STri))
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.addFrameIndex(FI)
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.addImm(0)
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.addReg(MI->getOperand(2).getReg());
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else // COPY -> LOAD
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NewMI = BuildMI(MF, MI->getDebugLoc(), get(SP::LDri),
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MI->getOperand(0).getReg())
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.addFrameIndex(FI)
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.addImm(0);
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}
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break;
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case SP::FMOVS:
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isFloat = true;
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// FALLTHROUGH
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case SP::FMOVD:
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if (OpNum == 0) { // COPY -> STORE
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unsigned SrcReg = MI->getOperand(1).getReg();
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bool isKill = MI->getOperand(1).isKill();
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bool isUndef = MI->getOperand(1).isUndef();
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NewMI = BuildMI(MF, MI->getDebugLoc(),
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get(isFloat ? SP::STFri : SP::STDFri))
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.addFrameIndex(FI)
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.addImm(0)
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.addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef));
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} else { // COPY -> LOAD
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unsigned DstReg = MI->getOperand(0).getReg();
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bool isDead = MI->getOperand(0).isDead();
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bool isUndef = MI->getOperand(0).isUndef();
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NewMI = BuildMI(MF, MI->getDebugLoc(),
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get(isFloat ? SP::LDFri : SP::LDDFri))
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.addReg(DstReg, RegState::Define |
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getDeadRegState(isDead) | getUndefRegState(isUndef))
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.addFrameIndex(FI)
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.addImm(0);
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}
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break;
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}
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return NewMI;
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}
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unsigned SparcInstrInfo::getGlobalBaseReg(MachineFunction *MF) const
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{
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SparcMachineFunctionInfo *SparcFI = MF->getInfo<SparcMachineFunctionInfo>();
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unsigned GlobalBaseReg = SparcFI->getGlobalBaseReg();
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if (GlobalBaseReg != 0)
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return GlobalBaseReg;
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// Insert the set of GlobalBaseReg into the first MBB of the function
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MachineBasicBlock &FirstMBB = MF->front();
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MachineBasicBlock::iterator MBBI = FirstMBB.begin();
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MachineRegisterInfo &RegInfo = MF->getRegInfo();
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GlobalBaseReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
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DebugLoc dl;
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BuildMI(FirstMBB, MBBI, dl, get(SP::GETPCX), GlobalBaseReg);
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SparcFI->setGlobalBaseReg(GlobalBaseReg);
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return GlobalBaseReg;
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}
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