#define LLVM_CODEGEN_MACHINEINSTRBUILDER_H
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
Undef = 0x20,
EarlyClobber = 0x40,
Debug = 0x80,
+ InternalRead = 0x100,
DefineNoRead = Define | Undef,
ImplicitDefine = Implicit | Define,
ImplicitKill = Implicit | Kill
}
class MachineInstrBuilder {
+ MachineFunction *MF;
MachineInstr *MI;
public:
- MachineInstrBuilder() : MI(0) {}
- explicit MachineInstrBuilder(MachineInstr *mi) : MI(mi) {}
+ MachineInstrBuilder() : MF(0), MI(0) {}
+
+ /// Create a MachineInstrBuilder for manipulating an existing instruction.
+ /// F must be the machine function that was used to allocate I.
+ MachineInstrBuilder(MachineFunction &F, MachineInstr *I) : MF(&F), MI(I) {}
/// Allow automatic conversion to the machine instruction we are working on.
///
unsigned SubReg = 0) const {
assert((flags & 0x1) == 0 &&
"Passing in 'true' to addReg is forbidden! Use enums instead.");
- MI->addOperand(MachineOperand::CreateReg(RegNo,
- flags & RegState::Define,
- flags & RegState::Implicit,
- flags & RegState::Kill,
- flags & RegState::Dead,
- flags & RegState::Undef,
- flags & RegState::EarlyClobber,
- SubReg,
- flags & RegState::Debug));
+ MI->addOperand(*MF, MachineOperand::CreateReg(RegNo,
+ flags & RegState::Define,
+ flags & RegState::Implicit,
+ flags & RegState::Kill,
+ flags & RegState::Dead,
+ flags & RegState::Undef,
+ flags & RegState::EarlyClobber,
+ SubReg,
+ flags & RegState::Debug,
+ flags & RegState::InternalRead));
return *this;
}
/// addImm - Add a new immediate operand.
///
const MachineInstrBuilder &addImm(int64_t Val) const {
- MI->addOperand(MachineOperand::CreateImm(Val));
+ MI->addOperand(*MF, MachineOperand::CreateImm(Val));
return *this;
}
const MachineInstrBuilder &addCImm(const ConstantInt *Val) const {
- MI->addOperand(MachineOperand::CreateCImm(Val));
+ MI->addOperand(*MF, MachineOperand::CreateCImm(Val));
return *this;
}
const MachineInstrBuilder &addFPImm(const ConstantFP *Val) const {
- MI->addOperand(MachineOperand::CreateFPImm(Val));
+ MI->addOperand(*MF, MachineOperand::CreateFPImm(Val));
return *this;
}
const MachineInstrBuilder &addMBB(MachineBasicBlock *MBB,
unsigned char TargetFlags = 0) const {
- MI->addOperand(MachineOperand::CreateMBB(MBB, TargetFlags));
+ MI->addOperand(*MF, MachineOperand::CreateMBB(MBB, TargetFlags));
return *this;
}
const MachineInstrBuilder &addFrameIndex(int Idx) const {
- MI->addOperand(MachineOperand::CreateFI(Idx));
+ MI->addOperand(*MF, MachineOperand::CreateFI(Idx));
return *this;
}
const MachineInstrBuilder &addConstantPoolIndex(unsigned Idx,
int Offset = 0,
unsigned char TargetFlags = 0) const {
- MI->addOperand(MachineOperand::CreateCPI(Idx, Offset, TargetFlags));
+ MI->addOperand(*MF, MachineOperand::CreateCPI(Idx, Offset, TargetFlags));
+ return *this;
+ }
+
+ const MachineInstrBuilder &addTargetIndex(unsigned Idx, int64_t Offset = 0,
+ unsigned char TargetFlags = 0) const {
+ MI->addOperand(*MF, MachineOperand::CreateTargetIndex(Idx, Offset,
+ TargetFlags));
return *this;
}
const MachineInstrBuilder &addJumpTableIndex(unsigned Idx,
unsigned char TargetFlags = 0) const {
- MI->addOperand(MachineOperand::CreateJTI(Idx, TargetFlags));
+ MI->addOperand(*MF, MachineOperand::CreateJTI(Idx, TargetFlags));
return *this;
}
const MachineInstrBuilder &addGlobalAddress(const GlobalValue *GV,
int64_t Offset = 0,
unsigned char TargetFlags = 0) const {
- MI->addOperand(MachineOperand::CreateGA(GV, Offset, TargetFlags));
+ MI->addOperand(*MF, MachineOperand::CreateGA(GV, Offset, TargetFlags));
return *this;
}
const MachineInstrBuilder &addExternalSymbol(const char *FnName,
unsigned char TargetFlags = 0) const {
- MI->addOperand(MachineOperand::CreateES(FnName, TargetFlags));
+ MI->addOperand(*MF, MachineOperand::CreateES(FnName, TargetFlags));
+ return *this;
+ }
+
+ const MachineInstrBuilder &addBlockAddress(const BlockAddress *BA,
+ int64_t Offset = 0,
+ unsigned char TargetFlags = 0) const {
+ MI->addOperand(*MF, MachineOperand::CreateBA(BA, Offset, TargetFlags));
return *this;
}
const MachineInstrBuilder &addRegMask(const uint32_t *Mask) const {
- MI->addOperand(MachineOperand::CreateRegMask(Mask));
+ MI->addOperand(*MF, MachineOperand::CreateRegMask(Mask));
return *this;
}
const MachineInstrBuilder &addMemOperand(MachineMemOperand *MMO) const {
- MI->addMemOperand(*MI->getParent()->getParent(), MMO);
+ MI->addMemOperand(*MF, MMO);
return *this;
}
const MachineInstrBuilder &addOperand(const MachineOperand &MO) const {
- MI->addOperand(MO);
+ MI->addOperand(*MF, MO);
return *this;
}
const MachineInstrBuilder &addMetadata(const MDNode *MD) const {
- MI->addOperand(MachineOperand::CreateMetadata(MD));
+ MI->addOperand(*MF, MachineOperand::CreateMetadata(MD));
return *this;
}
const MachineInstrBuilder &addSym(MCSymbol *Sym) const {
- MI->addOperand(MachineOperand::CreateMCSymbol(Sym));
+ MI->addOperand(*MF, MachineOperand::CreateMCSymbol(Sym));
return *this;
}
}
// Add a displacement from an existing MachineOperand with an added offset.
- const MachineInstrBuilder &addDisp(const MachineOperand &Disp,
- int64_t off) const {
+ const MachineInstrBuilder &addDisp(const MachineOperand &Disp, int64_t off,
+ unsigned char TargetFlags = 0) const {
switch (Disp.getType()) {
default:
llvm_unreachable("Unhandled operand type in addDisp()");
case MachineOperand::MO_Immediate:
return addImm(Disp.getImm() + off);
- case MachineOperand::MO_GlobalAddress:
- return addGlobalAddress(Disp.getGlobal(), Disp.getOffset() + off);
+ case MachineOperand::MO_GlobalAddress: {
+ // If caller specifies new TargetFlags then use it, otherwise the
+ // default behavior is to copy the target flags from the existing
+ // MachineOperand. This means if the caller wants to clear the
+ // target flags it needs to do so explicitly.
+ if (TargetFlags)
+ return addGlobalAddress(Disp.getGlobal(), Disp.getOffset() + off,
+ TargetFlags);
+ return addGlobalAddress(Disp.getGlobal(), Disp.getOffset() + off,
+ Disp.getTargetFlags());
+ }
}
}
+
+ /// Copy all the implicit operands from OtherMI onto this one.
+ const MachineInstrBuilder ©ImplicitOps(const MachineInstr *OtherMI) {
+ MI->copyImplicitOps(*MF, OtherMI);
+ return *this;
+ }
};
/// BuildMI - Builder interface. Specify how to create the initial instruction
inline MachineInstrBuilder BuildMI(MachineFunction &MF,
DebugLoc DL,
const MCInstrDesc &MCID) {
- return MachineInstrBuilder(MF.CreateMachineInstr(MCID, DL));
+ return MachineInstrBuilder(MF, MF.CreateMachineInstr(MCID, DL));
}
/// BuildMI - This version of the builder sets up the first operand as a
DebugLoc DL,
const MCInstrDesc &MCID,
unsigned DestReg) {
- return MachineInstrBuilder(MF.CreateMachineInstr(MCID, DL))
+ return MachineInstrBuilder(MF, MF.CreateMachineInstr(MCID, DL))
.addReg(DestReg, RegState::Define);
}
DebugLoc DL,
const MCInstrDesc &MCID,
unsigned DestReg) {
- MachineInstr *MI = BB.getParent()->CreateMachineInstr(MCID, DL);
+ MachineFunction &MF = *BB.getParent();
+ MachineInstr *MI = MF.CreateMachineInstr(MCID, DL);
BB.insert(I, MI);
- return MachineInstrBuilder(MI).addReg(DestReg, RegState::Define);
+ return MachineInstrBuilder(MF, MI).addReg(DestReg, RegState::Define);
}
inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
DebugLoc DL,
const MCInstrDesc &MCID,
unsigned DestReg) {
- MachineInstr *MI = BB.getParent()->CreateMachineInstr(MCID, DL);
+ MachineFunction &MF = *BB.getParent();
+ MachineInstr *MI = MF.CreateMachineInstr(MCID, DL);
BB.insert(I, MI);
- return MachineInstrBuilder(MI).addReg(DestReg, RegState::Define);
+ return MachineInstrBuilder(MF, MI).addReg(DestReg, RegState::Define);
}
inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
MachineBasicBlock::iterator I,
DebugLoc DL,
const MCInstrDesc &MCID) {
- MachineInstr *MI = BB.getParent()->CreateMachineInstr(MCID, DL);
+ MachineFunction &MF = *BB.getParent();
+ MachineInstr *MI = MF.CreateMachineInstr(MCID, DL);
BB.insert(I, MI);
- return MachineInstrBuilder(MI);
+ return MachineInstrBuilder(MF, MI);
}
inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
MachineBasicBlock::instr_iterator I,
DebugLoc DL,
const MCInstrDesc &MCID) {
- MachineInstr *MI = BB.getParent()->CreateMachineInstr(MCID, DL);
+ MachineFunction &MF = *BB.getParent();
+ MachineInstr *MI = MF.CreateMachineInstr(MCID, DL);
BB.insert(I, MI);
- return MachineInstrBuilder(MI);
+ return MachineInstrBuilder(MF, MI);
}
inline MachineInstrBuilder BuildMI(MachineBasicBlock &BB,
inline unsigned getUndefRegState(bool B) {
return B ? RegState::Undef : 0;
}
+inline unsigned getInternalReadRegState(bool B) {
+ return B ? RegState::InternalRead : 0;
+}
+inline unsigned getDebugRegState(bool B) {
+ return B ? RegState::Debug : 0;
+}
+
+
+/// Helper class for constructing bundles of MachineInstrs.
+///
+/// MIBundleBuilder can create a bundle from scratch by inserting new
+/// MachineInstrs one at a time, or it can create a bundle from a sequence of
+/// existing MachineInstrs in a basic block.
+class MIBundleBuilder {
+ MachineBasicBlock &MBB;
+ MachineBasicBlock::instr_iterator Begin;
+ MachineBasicBlock::instr_iterator End;
+
+public:
+ /// Create an MIBundleBuilder that inserts instructions into a new bundle in
+ /// BB above the bundle or instruction at Pos.
+ MIBundleBuilder(MachineBasicBlock &BB,
+ MachineBasicBlock::iterator Pos)
+ : MBB(BB), Begin(Pos.getInstrIterator()), End(Begin) {}
+
+ /// Create a bundle from the sequence of instructions between B and E.
+ MIBundleBuilder(MachineBasicBlock &BB,
+ MachineBasicBlock::iterator B,
+ MachineBasicBlock::iterator E)
+ : MBB(BB), Begin(B.getInstrIterator()), End(E.getInstrIterator()) {
+ assert(B != E && "No instructions to bundle");
+ ++B;
+ while (B != E) {
+ MachineInstr *MI = B;
+ ++B;
+ MI->bundleWithPred();
+ }
+ }
+
+ /// Create an MIBundleBuilder representing an existing instruction or bundle
+ /// that has MI as its head.
+ explicit MIBundleBuilder(MachineInstr *MI)
+ : MBB(*MI->getParent()), Begin(MI), End(getBundleEnd(MI)) {}
+
+ /// Return a reference to the basic block containing this bundle.
+ MachineBasicBlock &getMBB() const { return MBB; }
+
+ /// Return true if no instructions have been inserted in this bundle yet.
+ /// Empty bundles aren't representable in a MachineBasicBlock.
+ bool empty() const { return Begin == End; }
+
+ /// Return an iterator to the first bundled instruction.
+ MachineBasicBlock::instr_iterator begin() const { return Begin; }
+
+ /// Return an iterator beyond the last bundled instruction.
+ MachineBasicBlock::instr_iterator end() const { return End; }
+
+ /// Insert MI into this bundle before I which must point to an instruction in
+ /// the bundle, or end().
+ MIBundleBuilder &insert(MachineBasicBlock::instr_iterator I,
+ MachineInstr *MI) {
+ MBB.insert(I, MI);
+ if (I == Begin) {
+ if (!empty())
+ MI->bundleWithSucc();
+ Begin = MI;
+ return *this;
+ }
+ if (I == End) {
+ MI->bundleWithPred();
+ return *this;
+ }
+ // MI was inserted in the middle of the bundle, so its neighbors' flags are
+ // already fine. Update MI's bundle flags manually.
+ MI->setFlag(MachineInstr::BundledPred);
+ MI->setFlag(MachineInstr::BundledSucc);
+ return *this;
+ }
+
+ /// Insert MI into MBB by prepending it to the instructions in the bundle.
+ /// MI will become the first instruction in the bundle.
+ MIBundleBuilder &prepend(MachineInstr *MI) {
+ return insert(begin(), MI);
+ }
+
+ /// Insert MI into MBB by appending it to the instructions in the bundle.
+ /// MI will become the last instruction in the bundle.
+ MIBundleBuilder &append(MachineInstr *MI) {
+ return insert(end(), MI);
+ }
+};
} // End llvm namespace
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