//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "Alpha.h"
#include "AlphaInstrInfo.h"
#include "AlphaGenInstrInfo.inc"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
using namespace llvm;
AlphaInstrInfo::AlphaInstrInfo()
- : TargetInstrInfo(AlphaInsts, sizeof(AlphaInsts)/sizeof(AlphaInsts[0])),
+ : TargetInstrInfoImpl(AlphaInsts, array_lengthof(AlphaInsts)),
RI(*this) { }
bool AlphaInstrInfo::isMoveInstr(const MachineInstr& MI,
- unsigned& sourceReg,
- unsigned& destReg) const {
- MachineOpCode oc = MI.getOpcode();
+ unsigned& sourceReg, unsigned& destReg,
+ unsigned& SrcSR, unsigned& DstSR) const {
+ unsigned oc = MI.getOpcode();
if (oc == Alpha::BISr ||
oc == Alpha::CPYSS ||
oc == Alpha::CPYST ||
// or r1, r2, r2
// cpys(s|t) r1 r2 r2
assert(MI.getNumOperands() >= 3 &&
- MI.getOperand(0).isRegister() &&
- MI.getOperand(1).isRegister() &&
- MI.getOperand(2).isRegister() &&
+ MI.getOperand(0).isReg() &&
+ MI.getOperand(1).isReg() &&
+ MI.getOperand(2).isReg() &&
"invalid Alpha BIS instruction!");
if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
sourceReg = MI.getOperand(1).getReg();
destReg = MI.getOperand(0).getReg();
+ SrcSR = DstSR = 0;
return true;
}
}
}
unsigned
-AlphaInstrInfo::isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const {
+AlphaInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
+ int &FrameIndex) const {
switch (MI->getOpcode()) {
case Alpha::LDL:
case Alpha::LDQ:
case Alpha::LDWU:
case Alpha::LDS:
case Alpha::LDT:
- if (MI->getOperand(1).isFrameIndex()) {
- FrameIndex = MI->getOperand(1).getFrameIndex();
+ if (MI->getOperand(1).isFI()) {
+ FrameIndex = MI->getOperand(1).getIndex();
return MI->getOperand(0).getReg();
}
break;
}
unsigned
-AlphaInstrInfo::isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const {
+AlphaInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
+ int &FrameIndex) const {
switch (MI->getOpcode()) {
case Alpha::STL:
case Alpha::STQ:
case Alpha::STW:
case Alpha::STS:
case Alpha::STT:
- if (MI->getOperand(1).isFrameIndex()) {
- FrameIndex = MI->getOperand(1).getFrameIndex();
+ if (MI->getOperand(1).isFI()) {
+ FrameIndex = MI->getOperand(1).getIndex();
return MI->getOperand(0).getReg();
}
break;
}
}
-unsigned AlphaInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
- MachineBasicBlock *FBB,
- const std::vector<MachineOperand> &Cond)const{
+unsigned AlphaInstrInfo::InsertBranch(MachineBasicBlock &MBB,
+ MachineBasicBlock *TBB,
+ MachineBasicBlock *FBB,
+ const SmallVectorImpl<MachineOperand> &Cond) const {
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
assert((Cond.size() == 2 || Cond.size() == 0) &&
"Alpha branch conditions have two components!");
return 2;
}
+bool AlphaInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *DestRC,
+ const TargetRegisterClass *SrcRC) const {
+ //cerr << "copyRegToReg " << DestReg << " <- " << SrcReg << "\n";
+ if (DestRC != SrcRC) {
+ // Not yet supported!
+ return false;
+ }
+
+ if (DestRC == Alpha::GPRCRegisterClass) {
+ BuildMI(MBB, MI, get(Alpha::BISr), DestReg).addReg(SrcReg).addReg(SrcReg);
+ } else if (DestRC == Alpha::F4RCRegisterClass) {
+ BuildMI(MBB, MI, get(Alpha::CPYSS), DestReg).addReg(SrcReg).addReg(SrcReg);
+ } else if (DestRC == Alpha::F8RCRegisterClass) {
+ BuildMI(MBB, MI, get(Alpha::CPYST), DestReg).addReg(SrcReg).addReg(SrcReg);
+ } else {
+ // Attempt to copy register that is not GPR or FPR
+ return false;
+ }
+
+ return true;
+}
+
+void
+AlphaInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned SrcReg, bool isKill, int FrameIdx,
+ const TargetRegisterClass *RC) const {
+ //cerr << "Trying to store " << getPrettyName(SrcReg) << " to "
+ // << FrameIdx << "\n";
+ //BuildMI(MBB, MI, Alpha::WTF, 0).addReg(SrcReg);
+ if (RC == Alpha::F4RCRegisterClass)
+ BuildMI(MBB, MI, get(Alpha::STS))
+ .addReg(SrcReg, false, false, isKill)
+ .addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ else if (RC == Alpha::F8RCRegisterClass)
+ BuildMI(MBB, MI, get(Alpha::STT))
+ .addReg(SrcReg, false, false, isKill)
+ .addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ else if (RC == Alpha::GPRCRegisterClass)
+ BuildMI(MBB, MI, get(Alpha::STQ))
+ .addReg(SrcReg, false, false, isKill)
+ .addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ else
+ abort();
+}
+
+void AlphaInstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+ bool isKill,
+ SmallVectorImpl<MachineOperand> &Addr,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) const {
+ unsigned Opc = 0;
+ if (RC == Alpha::F4RCRegisterClass)
+ Opc = Alpha::STS;
+ else if (RC == Alpha::F8RCRegisterClass)
+ Opc = Alpha::STT;
+ else if (RC == Alpha::GPRCRegisterClass)
+ Opc = Alpha::STQ;
+ else
+ abort();
+ MachineInstrBuilder MIB =
+ BuildMI(MF, get(Opc)).addReg(SrcReg, false, false, isKill);
+ for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+ MachineOperand &MO = Addr[i];
+ if (MO.isReg())
+ MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
+ else
+ MIB.addImm(MO.getImm());
+ }
+ NewMIs.push_back(MIB);
+}
+
+void
+AlphaInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, int FrameIdx,
+ const TargetRegisterClass *RC) const {
+ //cerr << "Trying to load " << getPrettyName(DestReg) << " to "
+ // << FrameIdx << "\n";
+ if (RC == Alpha::F4RCRegisterClass)
+ BuildMI(MBB, MI, get(Alpha::LDS), DestReg)
+ .addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ else if (RC == Alpha::F8RCRegisterClass)
+ BuildMI(MBB, MI, get(Alpha::LDT), DestReg)
+ .addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ else if (RC == Alpha::GPRCRegisterClass)
+ BuildMI(MBB, MI, get(Alpha::LDQ), DestReg)
+ .addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ else
+ abort();
+}
+
+void AlphaInstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+ SmallVectorImpl<MachineOperand> &Addr,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) const {
+ unsigned Opc = 0;
+ if (RC == Alpha::F4RCRegisterClass)
+ Opc = Alpha::LDS;
+ else if (RC == Alpha::F8RCRegisterClass)
+ Opc = Alpha::LDT;
+ else if (RC == Alpha::GPRCRegisterClass)
+ Opc = Alpha::LDQ;
+ else
+ abort();
+ MachineInstrBuilder MIB =
+ BuildMI(MF, get(Opc), DestReg);
+ for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+ MachineOperand &MO = Addr[i];
+ if (MO.isReg())
+ MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
+ else
+ MIB.addImm(MO.getImm());
+ }
+ NewMIs.push_back(MIB);
+}
+
+MachineInstr *AlphaInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
+ MachineInstr *MI,
+ const SmallVectorImpl<unsigned> &Ops,
+ int FrameIndex) const {
+ if (Ops.size() != 1) return NULL;
+
+ // Make sure this is a reg-reg copy.
+ unsigned Opc = MI->getOpcode();
+
+ MachineInstr *NewMI = NULL;
+ switch(Opc) {
+ default:
+ break;
+ case Alpha::BISr:
+ case Alpha::CPYSS:
+ case Alpha::CPYST:
+ if (MI->getOperand(1).getReg() == MI->getOperand(2).getReg()) {
+ if (Ops[0] == 0) { // move -> store
+ unsigned InReg = MI->getOperand(1).getReg();
+ bool isKill = MI->getOperand(1).isKill();
+ Opc = (Opc == Alpha::BISr) ? Alpha::STQ :
+ ((Opc == Alpha::CPYSS) ? Alpha::STS : Alpha::STT);
+ NewMI = BuildMI(MF, get(Opc)).addReg(InReg, false, false, isKill)
+ .addFrameIndex(FrameIndex)
+ .addReg(Alpha::F31);
+ } else { // load -> move
+ unsigned OutReg = MI->getOperand(0).getReg();
+ bool isDead = MI->getOperand(0).isDead();
+ Opc = (Opc == Alpha::BISr) ? Alpha::LDQ :
+ ((Opc == Alpha::CPYSS) ? Alpha::LDS : Alpha::LDT);
+ NewMI = BuildMI(MF, get(Opc)).addReg(OutReg, true, false, false, isDead)
+ .addFrameIndex(FrameIndex)
+ .addReg(Alpha::F31);
+ }
+ }
+ break;
+ }
+ return NewMI;
+}
+
static unsigned AlphaRevCondCode(unsigned Opcode) {
switch (Opcode) {
case Alpha::BEQ: return Alpha::BNE;
default:
assert(0 && "Unknown opcode");
}
+ return 0; // Not reached
}
// Branch analysis.
bool AlphaInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
- std::vector<MachineOperand> &Cond) const {
+ SmallVectorImpl<MachineOperand> &Cond) const {
// If the block has no terminators, it just falls into the block after it.
MachineBasicBlock::iterator I = MBB.end();
- if (I == MBB.begin() || !isTerminatorInstr((--I)->getOpcode()))
+ if (I == MBB.begin() || !isUnpredicatedTerminator(--I))
return false;
// Get the last instruction in the block.
MachineInstr *LastInst = I;
// If there is only one terminator instruction, process it.
- if (I == MBB.begin() || !isTerminatorInstr((--I)->getOpcode())) {
+ if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) {
if (LastInst->getOpcode() == Alpha::BR) {
- TBB = LastInst->getOperand(0).getMachineBasicBlock();
+ TBB = LastInst->getOperand(0).getMBB();
return false;
} else if (LastInst->getOpcode() == Alpha::COND_BRANCH_I ||
LastInst->getOpcode() == Alpha::COND_BRANCH_F) {
// Block ends with fall-through condbranch.
- TBB = LastInst->getOperand(2).getMachineBasicBlock();
+ TBB = LastInst->getOperand(2).getMBB();
Cond.push_back(LastInst->getOperand(0));
Cond.push_back(LastInst->getOperand(1));
return false;
// If there are three terminators, we don't know what sort of block this is.
if (SecondLastInst && I != MBB.begin() &&
- isTerminatorInstr((--I)->getOpcode()))
+ isUnpredicatedTerminator(--I))
return true;
// If the block ends with Alpha::BR and Alpha::COND_BRANCH_*, handle it.
if ((SecondLastInst->getOpcode() == Alpha::COND_BRANCH_I ||
SecondLastInst->getOpcode() == Alpha::COND_BRANCH_F) &&
LastInst->getOpcode() == Alpha::BR) {
- TBB = SecondLastInst->getOperand(2).getMachineBasicBlock();
+ TBB = SecondLastInst->getOperand(2).getMBB();
Cond.push_back(SecondLastInst->getOperand(0));
Cond.push_back(SecondLastInst->getOperand(1));
- FBB = LastInst->getOperand(0).getMachineBasicBlock();
+ FBB = LastInst->getOperand(0).getMBB();
return false;
}
+ // If the block ends with two Alpha::BRs, handle it. The second one is not
+ // executed, so remove it.
+ if (SecondLastInst->getOpcode() == Alpha::BR &&
+ LastInst->getOpcode() == Alpha::BR) {
+ TBB = SecondLastInst->getOperand(0).getMBB();
+ I = LastInst;
+ I->eraseFromParent();
+ return false;
+ }
+
// Otherwise, can't handle this.
return true;
}
.addReg(Alpha::R31);
}
-bool AlphaInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
+bool AlphaInstrInfo::BlockHasNoFallThrough(const MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;
switch (MBB.back().getOpcode()) {
+ case Alpha::RETDAG: // Return.
+ case Alpha::RETDAGp:
case Alpha::BR: // Uncond branch.
case Alpha::JMP: // Indirect branch.
return true;
}
}
bool AlphaInstrInfo::
-ReverseBranchCondition(std::vector<MachineOperand> &Cond) const {
+ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
assert(Cond.size() == 2 && "Invalid Alpha branch opcode!");
Cond[0].setImm(AlphaRevCondCode(Cond[0].getImm()));
return false;
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