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-rw-r--r--contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp261
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diff --git a/contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp b/contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
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+++ b/contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
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+//===- SparcInstrInfo.cpp - Sparc Instruction Information -------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the Sparc implementation of the TargetInstrInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SparcInstrInfo.h"
+#include "SparcSubtarget.h"
+#include "Sparc.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "SparcGenInstrInfo.inc"
+#include "SparcMachineFunctionInfo.h"
+using namespace llvm;
+
+SparcInstrInfo::SparcInstrInfo(SparcSubtarget &ST)
+ : TargetInstrInfoImpl(SparcInsts, array_lengthof(SparcInsts)),
+ RI(ST, *this), Subtarget(ST) {
+}
+
+static bool isZeroImm(const MachineOperand &op) {
+ return op.isImm() && op.getImm() == 0;
+}
+
+/// Return true if the instruction is a register to register move and
+/// leave the source and dest operands in the passed parameters.
+///
+bool SparcInstrInfo::isMoveInstr(const MachineInstr &MI,
+ unsigned &SrcReg, unsigned &DstReg,
+ unsigned &SrcSR, unsigned &DstSR) const {
+ SrcSR = DstSR = 0; // No sub-registers.
+
+ // We look for 3 kinds of patterns here:
+ // or with G0 or 0
+ // add with G0 or 0
+ // fmovs or FpMOVD (pseudo double move).
+ if (MI.getOpcode() == SP::ORrr || MI.getOpcode() == SP::ADDrr) {
+ if (MI.getOperand(1).getReg() == SP::G0) {
+ DstReg = MI.getOperand(0).getReg();
+ SrcReg = MI.getOperand(2).getReg();
+ return true;
+ } else if (MI.getOperand(2).getReg() == SP::G0) {
+ DstReg = MI.getOperand(0).getReg();
+ SrcReg = MI.getOperand(1).getReg();
+ return true;
+ }
+ } else if ((MI.getOpcode() == SP::ORri || MI.getOpcode() == SP::ADDri) &&
+ isZeroImm(MI.getOperand(2)) && MI.getOperand(1).isReg()) {
+ DstReg = MI.getOperand(0).getReg();
+ SrcReg = MI.getOperand(1).getReg();
+ return true;
+ } else if (MI.getOpcode() == SP::FMOVS || MI.getOpcode() == SP::FpMOVD ||
+ MI.getOpcode() == SP::FMOVD) {
+ SrcReg = MI.getOperand(1).getReg();
+ DstReg = MI.getOperand(0).getReg();
+ return true;
+ }
+ return false;
+}
+
+/// isLoadFromStackSlot - If the specified machine instruction is a direct
+/// load from a stack slot, return the virtual or physical register number of
+/// the destination along with the FrameIndex of the loaded stack slot. If
+/// not, return 0. This predicate must return 0 if the instruction has
+/// any side effects other than loading from the stack slot.
+unsigned SparcInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
+ int &FrameIndex) const {
+ if (MI->getOpcode() == SP::LDri ||
+ MI->getOpcode() == SP::LDFri ||
+ MI->getOpcode() == SP::LDDFri) {
+ if (MI->getOperand(1).isFI() && MI->getOperand(2).isImm() &&
+ MI->getOperand(2).getImm() == 0) {
+ FrameIndex = MI->getOperand(1).getIndex();
+ return MI->getOperand(0).getReg();
+ }
+ }
+ return 0;
+}
+
+/// isStoreToStackSlot - If the specified machine instruction is a direct
+/// store to a stack slot, return the virtual or physical register number of
+/// the source reg along with the FrameIndex of the loaded stack slot. If
+/// not, return 0. This predicate must return 0 if the instruction has
+/// any side effects other than storing to the stack slot.
+unsigned SparcInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
+ int &FrameIndex) const {
+ if (MI->getOpcode() == SP::STri ||
+ MI->getOpcode() == SP::STFri ||
+ MI->getOpcode() == SP::STDFri) {
+ if (MI->getOperand(0).isFI() && MI->getOperand(1).isImm() &&
+ MI->getOperand(1).getImm() == 0) {
+ FrameIndex = MI->getOperand(0).getIndex();
+ return MI->getOperand(2).getReg();
+ }
+ }
+ return 0;
+}
+
+unsigned
+SparcInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
+ MachineBasicBlock *FBB,
+ const SmallVectorImpl<MachineOperand> &Cond)const{
+ // FIXME this should probably take a DebugLoc argument
+ DebugLoc dl;
+ // Can only insert uncond branches so far.
+ assert(Cond.empty() && !FBB && TBB && "Can only handle uncond branches!");
+ BuildMI(&MBB, dl, get(SP::BA)).addMBB(TBB);
+ return 1;
+}
+
+bool SparcInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *DestRC,
+ const TargetRegisterClass *SrcRC,
+ DebugLoc DL) const {
+ if (DestRC != SrcRC) {
+ // Not yet supported!
+ return false;
+ }
+
+ if (DestRC == SP::IntRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::ORrr), DestReg).addReg(SP::G0).addReg(SrcReg);
+ else if (DestRC == SP::FPRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::FMOVS), DestReg).addReg(SrcReg);
+ else if (DestRC == SP::DFPRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(Subtarget.isV9() ? SP::FMOVD : SP::FpMOVD),DestReg)
+ .addReg(SrcReg);
+ else
+ // Can't copy this register
+ return false;
+
+ return true;
+}
+
+void SparcInstrInfo::
+storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+ unsigned SrcReg, bool isKill, int FI,
+ const TargetRegisterClass *RC,
+ const TargetRegisterInfo *TRI) const {
+ DebugLoc DL;
+ if (I != MBB.end()) DL = I->getDebugLoc();
+
+ // On the order of operands here: think "[FrameIdx + 0] = SrcReg".
+ if (RC == SP::IntRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::STri)).addFrameIndex(FI).addImm(0)
+ .addReg(SrcReg, getKillRegState(isKill));
+ else if (RC == SP::FPRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::STFri)).addFrameIndex(FI).addImm(0)
+ .addReg(SrcReg, getKillRegState(isKill));
+ else if (RC == SP::DFPRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::STDFri)).addFrameIndex(FI).addImm(0)
+ .addReg(SrcReg, getKillRegState(isKill));
+ else
+ llvm_unreachable("Can't store this register to stack slot");
+}
+
+void SparcInstrInfo::
+loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+ unsigned DestReg, int FI,
+ const TargetRegisterClass *RC,
+ const TargetRegisterInfo *TRI) const {
+ DebugLoc DL;
+ if (I != MBB.end()) DL = I->getDebugLoc();
+
+ if (RC == SP::IntRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::LDri), DestReg).addFrameIndex(FI).addImm(0);
+ else if (RC == SP::FPRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::LDFri), DestReg).addFrameIndex(FI).addImm(0);
+ else if (RC == SP::DFPRegsRegisterClass)
+ BuildMI(MBB, I, DL, get(SP::LDDFri), DestReg).addFrameIndex(FI).addImm(0);
+ else
+ llvm_unreachable("Can't load this register from stack slot");
+}
+
+MachineInstr *SparcInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
+ MachineInstr* MI,
+ const SmallVectorImpl<unsigned> &Ops,
+ int FI) const {
+ if (Ops.size() != 1) return NULL;
+
+ unsigned OpNum = Ops[0];
+ bool isFloat = false;
+ MachineInstr *NewMI = NULL;
+ switch (MI->getOpcode()) {
+ case SP::ORrr:
+ if (MI->getOperand(1).isReg() && MI->getOperand(1).getReg() == SP::G0&&
+ MI->getOperand(0).isReg() && MI->getOperand(2).isReg()) {
+ if (OpNum == 0) // COPY -> STORE
+ NewMI = BuildMI(MF, MI->getDebugLoc(), get(SP::STri))
+ .addFrameIndex(FI)
+ .addImm(0)
+ .addReg(MI->getOperand(2).getReg());
+ else // COPY -> LOAD
+ NewMI = BuildMI(MF, MI->getDebugLoc(), get(SP::LDri),
+ MI->getOperand(0).getReg())
+ .addFrameIndex(FI)
+ .addImm(0);
+ }
+ break;
+ case SP::FMOVS:
+ isFloat = true;
+ // FALLTHROUGH
+ case SP::FMOVD:
+ if (OpNum == 0) { // COPY -> STORE
+ unsigned SrcReg = MI->getOperand(1).getReg();
+ bool isKill = MI->getOperand(1).isKill();
+ bool isUndef = MI->getOperand(1).isUndef();
+ NewMI = BuildMI(MF, MI->getDebugLoc(),
+ get(isFloat ? SP::STFri : SP::STDFri))
+ .addFrameIndex(FI)
+ .addImm(0)
+ .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef));
+ } else { // COPY -> LOAD
+ unsigned DstReg = MI->getOperand(0).getReg();
+ bool isDead = MI->getOperand(0).isDead();
+ bool isUndef = MI->getOperand(0).isUndef();
+ NewMI = BuildMI(MF, MI->getDebugLoc(),
+ get(isFloat ? SP::LDFri : SP::LDDFri))
+ .addReg(DstReg, RegState::Define |
+ getDeadRegState(isDead) | getUndefRegState(isUndef))
+ .addFrameIndex(FI)
+ .addImm(0);
+ }
+ break;
+ }
+
+ return NewMI;
+}
+
+unsigned SparcInstrInfo::getGlobalBaseReg(MachineFunction *MF) const
+{
+ SparcMachineFunctionInfo *SparcFI = MF->getInfo<SparcMachineFunctionInfo>();
+ unsigned GlobalBaseReg = SparcFI->getGlobalBaseReg();
+ if (GlobalBaseReg != 0)
+ return GlobalBaseReg;
+
+ // Insert the set of GlobalBaseReg into the first MBB of the function
+ MachineBasicBlock &FirstMBB = MF->front();
+ MachineBasicBlock::iterator MBBI = FirstMBB.begin();
+ MachineRegisterInfo &RegInfo = MF->getRegInfo();
+
+ GlobalBaseReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
+
+
+ DebugLoc dl;
+
+ BuildMI(FirstMBB, MBBI, dl, get(SP::GETPCX), GlobalBaseReg);
+ SparcFI->setGlobalBaseReg(GlobalBaseReg);
+ return GlobalBaseReg;
+}
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