-//===- MSP430InstrInfo.cpp - MSP430 Instruction Information ---------------===//
+//===-- MSP430InstrInfo.cpp - MSP430 Instruction Information --------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
-#include "MSP430.h"
#include "MSP430InstrInfo.h"
+#include "MSP430.h"
#include "MSP430MachineFunctionInfo.h"
#include "MSP430TargetMachine.h"
-#include "MSP430GenInstrInfo.inc"
-#include "llvm/Function.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/PseudoSourceValue.h"
+#include "llvm/IR/Function.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetRegistry.h"
+
+#define GET_INSTRINFO_CTOR_DTOR
+#include "MSP430GenInstrInfo.inc"
using namespace llvm;
+// Pin the vtable to this file.
+void MSP430InstrInfo::anchor() {}
+
MSP430InstrInfo::MSP430InstrInfo(MSP430TargetMachine &tm)
- : TargetInstrInfoImpl(MSP430Insts, array_lengthof(MSP430Insts)),
- RI(tm, *this), TM(tm) {}
+ : MSP430GenInstrInfo(MSP430::ADJCALLSTACKDOWN, MSP430::ADJCALLSTACKUP),
+ RI(tm) {}
void MSP430InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill, int FrameIdx,
- const TargetRegisterClass *RC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
+ const TargetRegisterClass *RC,
+ const TargetRegisterInfo *TRI) const {
+ DebugLoc DL;
if (MI != MBB.end()) DL = MI->getDebugLoc();
MachineFunction &MF = *MBB.getParent();
MachineFrameInfo &MFI = *MF.getFrameInfo();
MachineMemOperand *MMO =
- MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FrameIdx),
- MachineMemOperand::MOStore, 0,
+ MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FrameIdx),
+ MachineMemOperand::MOStore,
MFI.getObjectSize(FrameIdx),
MFI.getObjectAlignment(FrameIdx));
void MSP430InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIdx,
- const TargetRegisterClass *RC) const{
- DebugLoc DL = DebugLoc::getUnknownLoc();
+ const TargetRegisterClass *RC,
+ const TargetRegisterInfo *TRI) const{
+ DebugLoc DL;
if (MI != MBB.end()) DL = MI->getDebugLoc();
MachineFunction &MF = *MBB.getParent();
MachineFrameInfo &MFI = *MF.getFrameInfo();
MachineMemOperand *MMO =
- MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FrameIdx),
- MachineMemOperand::MOLoad, 0,
+ MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FrameIdx),
+ MachineMemOperand::MOLoad,
MFI.getObjectSize(FrameIdx),
MFI.getObjectAlignment(FrameIdx));
llvm_unreachable("Cannot store this register to stack slot!");
}
-bool MSP430InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *DestRC,
- const TargetRegisterClass *SrcRC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
- if (DestRC == SrcRC) {
- unsigned Opc;
- if (DestRC == &MSP430::GR16RegClass) {
- Opc = MSP430::MOV16rr;
- } else if (DestRC == &MSP430::GR8RegClass) {
- Opc = MSP430::MOV8rr;
- } else {
- return false;
- }
-
- BuildMI(MBB, I, DL, get(Opc), DestReg).addReg(SrcReg);
- return true;
- }
-
- return false;
-}
-
-bool
-MSP430InstrInfo::isMoveInstr(const MachineInstr& MI,
- unsigned &SrcReg, unsigned &DstReg,
- unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
- SrcSubIdx = DstSubIdx = 0; // No sub-registers yet.
-
- switch (MI.getOpcode()) {
- default:
- return false;
- case MSP430::MOV8rr:
- case MSP430::MOV16rr:
- assert(MI.getNumOperands() >= 2 &&
- MI.getOperand(0).isReg() &&
- MI.getOperand(1).isReg() &&
- "invalid register-register move instruction");
- SrcReg = MI.getOperand(1).getReg();
- DstReg = MI.getOperand(0).getReg();
- return true;
- }
-}
-
-bool
-MSP430InstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const {
- if (CSI.empty())
- return false;
-
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (MI != MBB.end()) DL = MI->getDebugLoc();
-
- MachineFunction &MF = *MBB.getParent();
- MSP430MachineFunctionInfo *MFI = MF.getInfo<MSP430MachineFunctionInfo>();
- MFI->setCalleeSavedFrameSize(CSI.size() * 2);
-
- for (unsigned i = CSI.size(); i != 0; --i) {
- unsigned Reg = CSI[i-1].getReg();
- // Add the callee-saved register as live-in. It's killed at the spill.
- MBB.addLiveIn(Reg);
- BuildMI(MBB, MI, DL, get(MSP430::PUSH16r))
- .addReg(Reg, RegState::Kill);
- }
- return true;
-}
-
-bool
-MSP430InstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const {
- if (CSI.empty())
- return false;
-
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (MI != MBB.end()) DL = MI->getDebugLoc();
-
- for (unsigned i = 0, e = CSI.size(); i != e; ++i)
- BuildMI(MBB, MI, DL, get(MSP430::POP16r), CSI[i].getReg());
+void MSP430InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I, DebugLoc DL,
+ unsigned DestReg, unsigned SrcReg,
+ bool KillSrc) const {
+ unsigned Opc;
+ if (MSP430::GR16RegClass.contains(DestReg, SrcReg))
+ Opc = MSP430::MOV16rr;
+ else if (MSP430::GR8RegClass.contains(DestReg, SrcReg))
+ Opc = MSP430::MOV8rr;
+ else
+ llvm_unreachable("Impossible reg-to-reg copy");
- return true;
+ BuildMI(MBB, I, DL, get(Opc), DestReg)
+ .addReg(SrcReg, getKillRegState(KillSrc));
}
unsigned MSP430InstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
while (I != MBB.begin()) {
--I;
+ if (I->isDebugValue())
+ continue;
if (I->getOpcode() != MSP430::JMP &&
- I->getOpcode() != MSP430::JCC)
+ I->getOpcode() != MSP430::JCC &&
+ I->getOpcode() != MSP430::Br &&
+ I->getOpcode() != MSP430::Bm)
break;
// Remove the branch.
I->eraseFromParent();
MSP430CC::CondCodes CC = static_cast<MSP430CC::CondCodes>(Cond[0].getImm());
switch (CC) {
- default:
- assert(0 && "Invalid branch condition!");
- break;
+ default: llvm_unreachable("Invalid branch condition!");
case MSP430CC::COND_E:
CC = MSP430CC::COND_NE;
break;
return false;
}
-bool MSP430InstrInfo::BlockHasNoFallThrough(const MachineBasicBlock &MBB)const{
- if (MBB.empty()) return false;
-
- switch (MBB.back().getOpcode()) {
- case MSP430::RET: // Return.
- case MSP430::JMP: // Uncond branch.
- return true;
- default: return false;
- }
-}
-
bool MSP430InstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
- const TargetInstrDesc &TID = MI->getDesc();
- if (!TID.isTerminator()) return false;
+ if (!MI->isTerminator()) return false;
// Conditional branch is a special case.
- if (TID.isBranch() && !TID.isBarrier())
+ if (MI->isBranch() && !MI->isBarrier())
return true;
- if (!TID.isPredicable())
+ if (!MI->isPredicable())
return true;
return !isPredicated(MI);
}
MachineBasicBlock::iterator I = MBB.end();
while (I != MBB.begin()) {
--I;
+ if (I->isDebugValue())
+ continue;
+
// Working from the bottom, when we see a non-terminator
// instruction, we're done.
if (!isUnpredicatedTerminator(I))
// A terminator that isn't a branch can't easily be handled
// by this analysis.
- if (!I->getDesc().isBranch())
+ if (!I->isBranch())
+ return true;
+
+ // Cannot handle indirect branches.
+ if (I->getOpcode() == MSP430::Br ||
+ I->getOpcode() == MSP430::Bm)
return true;
// Handle unconditional branches.
unsigned
MSP430InstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
- const SmallVectorImpl<MachineOperand> &Cond) const {
- // FIXME this should probably have a DebugLoc operand
- DebugLoc dl = DebugLoc::getUnknownLoc();
-
+ const SmallVectorImpl<MachineOperand> &Cond,
+ DebugLoc DL) const {
// Shouldn't be a fall through.
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
assert((Cond.size() == 1 || Cond.size() == 0) &&
if (Cond.empty()) {
// Unconditional branch?
assert(!FBB && "Unconditional branch with multiple successors!");
- BuildMI(&MBB, dl, get(MSP430::JMP)).addMBB(TBB);
+ BuildMI(&MBB, DL, get(MSP430::JMP)).addMBB(TBB);
return 1;
}
// Conditional branch.
unsigned Count = 0;
- BuildMI(&MBB, dl, get(MSP430::JCC)).addMBB(TBB).addImm(Cond[0].getImm());
+ BuildMI(&MBB, DL, get(MSP430::JCC)).addMBB(TBB).addImm(Cond[0].getImm());
++Count;
if (FBB) {
// Two-way Conditional branch. Insert the second branch.
- BuildMI(&MBB, dl, get(MSP430::JMP)).addMBB(FBB);
+ BuildMI(&MBB, DL, get(MSP430::JMP)).addMBB(FBB);
++Count;
}
return Count;
}
+
+/// GetInstSize - Return the number of bytes of code the specified
+/// instruction may be. This returns the maximum number of bytes.
+///
+unsigned MSP430InstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
+ const MCInstrDesc &Desc = MI->getDesc();
+
+ switch (Desc.TSFlags & MSP430II::SizeMask) {
+ default:
+ switch (Desc.getOpcode()) {
+ default: llvm_unreachable("Unknown instruction size!");
+ case TargetOpcode::PROLOG_LABEL:
+ case TargetOpcode::EH_LABEL:
+ case TargetOpcode::IMPLICIT_DEF:
+ case TargetOpcode::KILL:
+ case TargetOpcode::DBG_VALUE:
+ return 0;
+ case TargetOpcode::INLINEASM: {
+ const MachineFunction *MF = MI->getParent()->getParent();
+ const TargetInstrInfo &TII = *MF->getTarget().getInstrInfo();
+ return TII.getInlineAsmLength(MI->getOperand(0).getSymbolName(),
+ *MF->getTarget().getMCAsmInfo());
+ }
+ }
+ case MSP430II::SizeSpecial:
+ switch (MI->getOpcode()) {
+ default: llvm_unreachable("Unknown instruction size!");
+ case MSP430::SAR8r1c:
+ case MSP430::SAR16r1c:
+ return 4;
+ }
+ case MSP430II::Size2Bytes:
+ return 2;
+ case MSP430II::Size4Bytes:
+ return 4;
+ case MSP430II::Size6Bytes:
+ return 6;
+ }
+}
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