#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
+#include "llvm/ADT/iterator_range.h"
#include "llvm/CodeGen/MachineOperand.h"
-#include "llvm/InlineAsm.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/DebugLoc.h"
+#include "llvm/IR/InlineAsm.h"
#include "llvm/MC/MCInstrDesc.h"
-#include "llvm/Support/DebugLoc.h"
+#include "llvm/Support/ArrayRecycler.h"
#include "llvm/Target/TargetOpcodes.h"
-#include <vector>
namespace llvm {
//===----------------------------------------------------------------------===//
/// MachineInstr - Representation of each machine instruction.
///
+/// This class isn't a POD type, but it must have a trivial destructor. When a
+/// MachineFunction is deleted, all the contained MachineInstrs are deallocated
+/// without having their destructor called.
+///
class MachineInstr : public ilist_node<MachineInstr> {
public:
typedef MachineMemOperand **mmo_iterator;
};
private:
const MCInstrDesc *MCID; // Instruction descriptor.
+ MachineBasicBlock *Parent; // Pointer to the owning basic block.
+
+ // Operands are allocated by an ArrayRecycler.
+ MachineOperand *Operands; // Pointer to the first operand.
+ unsigned NumOperands; // Number of operands on instruction.
+ typedef ArrayRecycler<MachineOperand>::Capacity OperandCapacity;
+ OperandCapacity CapOperands; // Capacity of the Operands array.
uint8_t Flags; // Various bits of additional
// information about machine
// anything other than to convey comment
// information to AsmPrinter.
- uint16_t NumMemRefs; // information on memory references
+ uint8_t NumMemRefs; // Information on memory references.
mmo_iterator MemRefs;
- std::vector<MachineOperand> Operands; // the operands
- MachineBasicBlock *Parent; // Pointer to the owning basic block.
DebugLoc debugLoc; // Source line information.
MachineInstr(const MachineInstr&) LLVM_DELETED_FUNCTION;
void operator=(const MachineInstr&) LLVM_DELETED_FUNCTION;
+ // Use MachineFunction::DeleteMachineInstr() instead.
+ ~MachineInstr() LLVM_DELETED_FUNCTION;
// Intrusive list support
friend struct ilist_traits<MachineInstr>;
/// MachineInstr ctor - This constructor create a MachineInstr and add the
/// implicit operands. It reserves space for number of operands specified by
/// MCInstrDesc. An explicit DebugLoc is supplied.
- MachineInstr(const MCInstrDesc &MCID, const DebugLoc dl, bool NoImp = false);
-
- ~MachineInstr();
+ MachineInstr(MachineFunction&, const MCInstrDesc &MCID,
+ const DebugLoc dl, bool NoImp = false);
// MachineInstrs are pool-allocated and owned by MachineFunction.
friend class MachineFunction;
return getFlag(BundledPred);
}
- /// setIsInsideBundle - Set InsideBundle bit.
- ///
- void setIsInsideBundle(bool Val = true) {
- if (Val)
- setFlag(BundledPred);
- else
- clearFlag(BundledPred);
- }
-
/// isBundled - Return true if this instruction part of a bundle. This is true
/// if either itself or its following instruction is marked "InsideBundle".
- bool isBundled() const;
+ bool isBundled() const {
+ return isBundledWithPred() || isBundledWithSucc();
+ }
/// Return true if this instruction is part of a bundle, and it is not the
/// first instruction in the bundle.
///
DebugLoc getDebugLoc() const { return debugLoc; }
+ /// \brief Return the debug variable referenced by
+ /// this DBG_VALUE instruction.
+ DIVariable getDebugVariable() const {
+ assert(isDebugValue() && "not a DBG_VALUE");
+ DIVariable Var(getOperand(2).getMetadata());
+ assert(Var.Verify() && "not a DIVariable");
+ return Var;
+ }
+
+ /// \brief Return the complex address expression referenced by
+ /// this DBG_VALUE instruction.
+ DIExpression getDebugExpression() const {
+ assert(isDebugValue() && "not a DBG_VALUE");
+ DIExpression Expr(getOperand(3).getMetadata());
+ assert(Expr.Verify() && "not a DIExpression");
+ return Expr;
+ }
+
/// emitError - Emit an error referring to the source location of this
/// instruction. This should only be used for inline assembly that is somehow
/// impossible to compile. Other errors should have been handled much
/// Access to explicit operands of the instruction.
///
- unsigned getNumOperands() const { return (unsigned)Operands.size(); }
+ unsigned getNumOperands() const { return NumOperands; }
const MachineOperand& getOperand(unsigned i) const {
assert(i < getNumOperands() && "getOperand() out of range!");
unsigned getNumExplicitOperands() const;
/// iterator/begin/end - Iterate over all operands of a machine instruction.
- typedef std::vector<MachineOperand>::iterator mop_iterator;
- typedef std::vector<MachineOperand>::const_iterator const_mop_iterator;
+ typedef MachineOperand *mop_iterator;
+ typedef const MachineOperand *const_mop_iterator;
- mop_iterator operands_begin() { return Operands.begin(); }
- mop_iterator operands_end() { return Operands.end(); }
+ mop_iterator operands_begin() { return Operands; }
+ mop_iterator operands_end() { return Operands + NumOperands; }
- const_mop_iterator operands_begin() const { return Operands.begin(); }
- const_mop_iterator operands_end() const { return Operands.end(); }
+ const_mop_iterator operands_begin() const { return Operands; }
+ const_mop_iterator operands_end() const { return Operands + NumOperands; }
+
+ iterator_range<mop_iterator> operands() {
+ return iterator_range<mop_iterator>(operands_begin(), operands_end());
+ }
+ iterator_range<const_mop_iterator> operands() const {
+ return iterator_range<const_mop_iterator>(operands_begin(), operands_end());
+ }
+ iterator_range<mop_iterator> explicit_operands() {
+ return iterator_range<mop_iterator>(
+ operands_begin(), operands_begin() + getNumExplicitOperands());
+ }
+ iterator_range<const_mop_iterator> explicit_operands() const {
+ return iterator_range<const_mop_iterator>(
+ operands_begin(), operands_begin() + getNumExplicitOperands());
+ }
+ iterator_range<mop_iterator> implicit_operands() {
+ return iterator_range<mop_iterator>(explicit_operands().end(),
+ operands_end());
+ }
+ iterator_range<const_mop_iterator> implicit_operands() const {
+ return iterator_range<const_mop_iterator>(explicit_operands().end(),
+ operands_end());
+ }
+ iterator_range<mop_iterator> defs() {
+ return iterator_range<mop_iterator>(
+ operands_begin(), operands_begin() + getDesc().getNumDefs());
+ }
+ iterator_range<const_mop_iterator> defs() const {
+ return iterator_range<const_mop_iterator>(
+ operands_begin(), operands_begin() + getDesc().getNumDefs());
+ }
+ iterator_range<mop_iterator> uses() {
+ return iterator_range<mop_iterator>(
+ operands_begin() + getDesc().getNumDefs(), operands_end());
+ }
+ iterator_range<const_mop_iterator> uses() const {
+ return iterator_range<const_mop_iterator>(
+ operands_begin() + getDesc().getNumDefs(), operands_end());
+ }
/// Access to memory operands of the instruction
mmo_iterator memoperands_begin() const { return MemRefs; }
mmo_iterator memoperands_end() const { return MemRefs + NumMemRefs; }
bool memoperands_empty() const { return NumMemRefs == 0; }
+ iterator_range<mmo_iterator> memoperands() {
+ return iterator_range<mmo_iterator>(memoperands_begin(), memoperands_end());
+ }
+ iterator_range<mmo_iterator> memoperands() const {
+ return iterator_range<mmo_iterator>(memoperands_begin(), memoperands_end());
+ }
+
/// hasOneMemOperand - Return true if this instruction has exactly one
/// MachineMemOperand.
bool hasOneMemOperand() const {
/// The second argument indicates whether the query should look inside
/// instruction bundles.
bool hasProperty(unsigned MCFlag, QueryType Type = AnyInBundle) const {
- // Inline the fast path.
- if (Type == IgnoreBundle || !isBundle())
+ // Inline the fast path for unbundled or bundle-internal instructions.
+ if (Type == IgnoreBundle || !isBundled() || isBundledWithPred())
return getDesc().getFlags() & (1 << MCFlag);
- // If we have a bundle, take the slow path.
+ // If this is the first instruction in a bundle, take the slow path.
return hasPropertyInBundle(1 << MCFlag, Type);
}
return isBranch(Type) & isBarrier(Type) & !isIndirectBranch(Type);
}
- // isPredicable - Return true if this instruction has a predicate operand that
- // controls execution. It may be set to 'always', or may be set to other
+ /// Return true if this instruction has a predicate operand that
+ /// controls execution. It may be set to 'always', or may be set to other
/// values. There are various methods in TargetInstrInfo that can be used to
/// control and modify the predicate in this instruction.
bool isPredicable(QueryType Type = AllInBundle) const {
return hasProperty(MCID::FoldableAsLoad, Type);
}
+ /// \brief Return true if this instruction behaves
+ /// the same way as the generic REG_SEQUENCE instructions.
+ /// E.g., on ARM,
+ /// dX VMOVDRR rY, rZ
+ /// is equivalent to
+ /// dX = REG_SEQUENCE rY, ssub_0, rZ, ssub_1.
+ ///
+ /// Note that for the optimizers to be able to take advantage of
+ /// this property, TargetInstrInfo::getRegSequenceLikeInputs has to be
+ /// override accordingly.
+ bool isRegSequenceLike(QueryType Type = IgnoreBundle) const {
+ return hasProperty(MCID::RegSequence, Type);
+ }
+
+ /// \brief Return true if this instruction behaves
+ /// the same way as the generic EXTRACT_SUBREG instructions.
+ /// E.g., on ARM,
+ /// rX, rY VMOVRRD dZ
+ /// is equivalent to two EXTRACT_SUBREG:
+ /// rX = EXTRACT_SUBREG dZ, ssub_0
+ /// rY = EXTRACT_SUBREG dZ, ssub_1
+ ///
+ /// Note that for the optimizers to be able to take advantage of
+ /// this property, TargetInstrInfo::getExtractSubregLikeInputs has to be
+ /// override accordingly.
+ bool isExtractSubregLike(QueryType Type = IgnoreBundle) const {
+ return hasProperty(MCID::ExtractSubreg, Type);
+ }
+
+ /// \brief Return true if this instruction behaves
+ /// the same way as the generic INSERT_SUBREG instructions.
+ /// E.g., on ARM,
+ /// dX = VSETLNi32 dY, rZ, Imm
+ /// is equivalent to a INSERT_SUBREG:
+ /// dX = INSERT_SUBREG dY, rZ, translateImmToSubIdx(Imm)
+ ///
+ /// Note that for the optimizers to be able to take advantage of
+ /// this property, TargetInstrInfo::getInsertSubregLikeInputs has to be
+ /// override accordingly.
+ bool isInsertSubregLike(QueryType Type = IgnoreBundle) const {
+ return hasProperty(MCID::InsertSubreg, Type);
+ }
+
//===--------------------------------------------------------------------===//
// Side Effect Analysis
//===--------------------------------------------------------------------===//
/// are not marking copies from and to the same register class with this flag.
bool isAsCheapAsAMove(QueryType Type = AllInBundle) const {
// Only returns true for a bundle if all bundled instructions are cheap.
- // FIXME: This probably requires a target hook.
return hasProperty(MCID::CheapAsAMove, Type);
}
/// eraseFromBundle() to erase individual bundled instructions.
void eraseFromParent();
+ /// Unlink 'this' from the containing basic block and delete it.
+ ///
+ /// For all definitions mark their uses in DBG_VALUE nodes
+ /// as undefined. Otherwise like eraseFromParent().
+ void eraseFromParentAndMarkDBGValuesForRemoval();
+
/// Unlink 'this' form its basic block and delete it.
///
/// If the instruction is part of a bundle, the other instructions in the
/// bundle remain bundled.
void eraseFromBundle();
+ bool isEHLabel() const { return getOpcode() == TargetOpcode::EH_LABEL; }
+ bool isGCLabel() const { return getOpcode() == TargetOpcode::GC_LABEL; }
+
/// isLabel - Returns true if the MachineInstr represents a label.
///
- bool isLabel() const {
- return getOpcode() == TargetOpcode::PROLOG_LABEL ||
- getOpcode() == TargetOpcode::EH_LABEL ||
- getOpcode() == TargetOpcode::GC_LABEL;
+ bool isLabel() const { return isEHLabel() || isGCLabel(); }
+ bool isCFIInstruction() const {
+ return getOpcode() == TargetOpcode::CFI_INSTRUCTION;
}
- bool isPrologLabel() const {
- return getOpcode() == TargetOpcode::PROLOG_LABEL;
- }
- bool isEHLabel() const { return getOpcode() == TargetOpcode::EH_LABEL; }
- bool isGCLabel() const { return getOpcode() == TargetOpcode::GC_LABEL; }
+ // True if the instruction represents a position in the function.
+ bool isPosition() const { return isLabel() || isCFIInstruction(); }
+
bool isDebugValue() const { return getOpcode() == TargetOpcode::DBG_VALUE; }
+ /// A DBG_VALUE is indirect iff the first operand is a register and
+ /// the second operand is an immediate.
+ bool isIndirectDebugValue() const {
+ return isDebugValue()
+ && getOperand(0).isReg()
+ && getOperand(1).isImm();
+ }
bool isPHI() const { return getOpcode() == TargetOpcode::PHI; }
bool isKill() const { return getOpcode() == TargetOpcode::KILL; }
bool isImplicitDef() const { return getOpcode()==TargetOpcode::IMPLICIT_DEF; }
bool isInlineAsm() const { return getOpcode() == TargetOpcode::INLINEASM; }
+ bool isMSInlineAsm() const {
+ return getOpcode() == TargetOpcode::INLINEASM && getInlineAsmDialect();
+ }
bool isStackAligningInlineAsm() const;
InlineAsm::AsmDialect getInlineAsmDialect() const;
bool isInsertSubreg() const {
bool isFullCopy() const {
return isCopy() && !getOperand(0).getSubReg() && !getOperand(1).getSubReg();
}
+ bool isExtractSubreg() const {
+ return getOpcode() == TargetOpcode::EXTRACT_SUBREG;
+ }
/// isCopyLike - Return true if the instruction behaves like a copy.
/// This does not include native copy instructions.
// Pseudo-instructions that don't produce any real output.
case TargetOpcode::IMPLICIT_DEF:
case TargetOpcode::KILL:
- case TargetOpcode::PROLOG_LABEL:
+ case TargetOpcode::CFI_INSTRUCTION:
case TargetOpcode::EH_LABEL:
case TargetOpcode::GC_LABEL:
case TargetOpcode::DBG_VALUE:
}
}
- /// getBundleSize - Return the number of instructions inside the MI bundle.
+ /// Return the number of instructions inside the MI bundle, excluding the
+ /// bundle header.
+ ///
+ /// This is the number of instructions that MachineBasicBlock::iterator
+ /// skips, 0 for unbundled instructions.
unsigned getBundleSize() const;
/// readsRegister - Return true if the MachineInstr reads the specified
/// is a read of a super-register.
/// This does not count partial redefines of virtual registers as reads:
/// %reg1024:6 = OP.
- bool readsRegister(unsigned Reg, const TargetRegisterInfo *TRI = NULL) const {
+ bool readsRegister(unsigned Reg,
+ const TargetRegisterInfo *TRI = nullptr) const {
return findRegisterUseOperandIdx(Reg, false, TRI) != -1;
}
/// partial defines.
/// If Ops is not null, all operand indices for Reg are added.
std::pair<bool,bool> readsWritesVirtualRegister(unsigned Reg,
- SmallVectorImpl<unsigned> *Ops = 0) const;
+ SmallVectorImpl<unsigned> *Ops = nullptr) const;
/// killsRegister - Return true if the MachineInstr kills the specified
/// register. If TargetRegisterInfo is passed, then it also checks if there is
/// a kill of a super-register.
- bool killsRegister(unsigned Reg, const TargetRegisterInfo *TRI = NULL) const {
+ bool killsRegister(unsigned Reg,
+ const TargetRegisterInfo *TRI = nullptr) const {
return findRegisterUseOperandIdx(Reg, true, TRI) != -1;
}
/// specified register. If TargetRegisterInfo is passed, then it also checks
/// if there is a def of a super-register.
/// NOTE: It's ignoring subreg indices on virtual registers.
- bool definesRegister(unsigned Reg, const TargetRegisterInfo *TRI=NULL) const {
+ bool definesRegister(unsigned Reg,
+ const TargetRegisterInfo *TRI = nullptr) const {
return findRegisterDefOperandIdx(Reg, false, false, TRI) != -1;
}
/// instruction. If TargetRegisterInfo is passed, then it also checks
/// if there is a dead def of a super-register.
bool registerDefIsDead(unsigned Reg,
- const TargetRegisterInfo *TRI = NULL) const {
+ const TargetRegisterInfo *TRI = nullptr) const {
return findRegisterDefOperandIdx(Reg, true, false, TRI) != -1;
}
/// the specific register or -1 if it is not found. It further tightens
/// the search criteria to a use that kills the register if isKill is true.
int findRegisterUseOperandIdx(unsigned Reg, bool isKill = false,
- const TargetRegisterInfo *TRI = NULL) const;
+ const TargetRegisterInfo *TRI = nullptr) const;
/// findRegisterUseOperand - Wrapper for findRegisterUseOperandIdx, it returns
/// a pointer to the MachineOperand rather than an index.
MachineOperand *findRegisterUseOperand(unsigned Reg, bool isKill = false,
- const TargetRegisterInfo *TRI = NULL) {
+ const TargetRegisterInfo *TRI = nullptr) {
int Idx = findRegisterUseOperandIdx(Reg, isKill, TRI);
- return (Idx == -1) ? NULL : &getOperand(Idx);
+ return (Idx == -1) ? nullptr : &getOperand(Idx);
}
/// findRegisterDefOperandIdx() - Returns the operand index that is a def of
/// This may also return a register mask operand when Overlap is true.
int findRegisterDefOperandIdx(unsigned Reg,
bool isDead = false, bool Overlap = false,
- const TargetRegisterInfo *TRI = NULL) const;
+ const TargetRegisterInfo *TRI = nullptr) const;
/// findRegisterDefOperand - Wrapper for findRegisterDefOperandIdx, it returns
/// a pointer to the MachineOperand rather than an index.
MachineOperand *findRegisterDefOperand(unsigned Reg, bool isDead = false,
- const TargetRegisterInfo *TRI = NULL) {
+ const TargetRegisterInfo *TRI = nullptr) {
int Idx = findRegisterDefOperandIdx(Reg, isDead, false, TRI);
- return (Idx == -1) ? NULL : &getOperand(Idx);
+ return (Idx == -1) ? nullptr : &getOperand(Idx);
}
/// findFirstPredOperandIdx() - Find the index of the first operand in the
/// The flag operand is an immediate that can be decoded with methods like
/// InlineAsm::hasRegClassConstraint().
///
- int findInlineAsmFlagIdx(unsigned OpIdx, unsigned *GroupNo = 0) const;
+ int findInlineAsmFlagIdx(unsigned OpIdx, unsigned *GroupNo = nullptr) const;
/// getRegClassConstraint - Compute the static register class constraint for
/// operand OpIdx. For normal instructions, this is derived from the
const TargetInstrInfo *TII,
const TargetRegisterInfo *TRI) const;
+ /// \brief Applies the constraints (def/use) implied by this MI on \p Reg to
+ /// the given \p CurRC.
+ /// If \p ExploreBundle is set and MI is part of a bundle, all the
+ /// instructions inside the bundle will be taken into account. In other words,
+ /// this method accumulates all the constrains of the operand of this MI and
+ /// the related bundle if MI is a bundle or inside a bundle.
+ ///
+ /// Returns the register class that statisfies both \p CurRC and the
+ /// constraints set by MI. Returns NULL if such a register class does not
+ /// exist.
+ ///
+ /// \pre CurRC must not be NULL.
+ const TargetRegisterClass *getRegClassConstraintEffectForVReg(
+ unsigned Reg, const TargetRegisterClass *CurRC,
+ const TargetInstrInfo *TII, const TargetRegisterInfo *TRI,
+ bool ExploreBundle = false) const;
+
+ /// \brief Applies the constraints (def/use) implied by the \p OpIdx operand
+ /// to the given \p CurRC.
+ ///
+ /// Returns the register class that statisfies both \p CurRC and the
+ /// constraints set by \p OpIdx MI. Returns NULL if such a register class
+ /// does not exist.
+ ///
+ /// \pre CurRC must not be NULL.
+ /// \pre The operand at \p OpIdx must be a register.
+ const TargetRegisterClass *
+ getRegClassConstraintEffect(unsigned OpIdx, const TargetRegisterClass *CurRC,
+ const TargetInstrInfo *TII,
+ const TargetRegisterInfo *TRI) const;
+
/// tieOperands - Add a tie between the register operands at DefIdx and
/// UseIdx. The tie will cause the register allocator to ensure that the two
/// operands are assigned the same physical register.
/// check if the register def is tied to a source operand, due to either
/// two-address elimination or inline assembly constraints. Returns the
/// first tied use operand index by reference if UseOpIdx is not null.
- bool isRegTiedToUseOperand(unsigned DefOpIdx, unsigned *UseOpIdx = 0) const {
+ bool isRegTiedToUseOperand(unsigned DefOpIdx,
+ unsigned *UseOpIdx = nullptr) const {
const MachineOperand &MO = getOperand(DefOpIdx);
if (!MO.isReg() || !MO.isDef() || !MO.isTied())
return false;
}
/// isRegTiedToDefOperand - Return true if the use operand of the specified
- /// index is tied to an def operand. It also returns the def operand index by
+ /// index is tied to a def operand. It also returns the def operand index by
/// reference if DefOpIdx is not null.
- bool isRegTiedToDefOperand(unsigned UseOpIdx, unsigned *DefOpIdx = 0) const {
+ bool isRegTiedToDefOperand(unsigned UseOpIdx,
+ unsigned *DefOpIdx = nullptr) const {
const MachineOperand &MO = getOperand(UseOpIdx);
if (!MO.isReg() || !MO.isUse() || !MO.isTied())
return false;
///
void clearKillInfo();
- /// copyKillDeadInfo - Copies kill / dead operand properties from MI.
- ///
- void copyKillDeadInfo(const MachineInstr *MI);
-
- /// copyPredicates - Copies predicate operand(s) from MI.
- void copyPredicates(const MachineInstr *MI);
-
/// substituteRegister - Replace all occurrences of FromReg with ToReg:SubIdx,
/// properly composing subreg indices where necessary.
void substituteRegister(unsigned FromReg, unsigned ToReg, unsigned SubIdx,
/// Look for the operand that defines it and mark it as IsDead. If
/// AddIfNotFound is true, add a implicit operand if it's not found. Returns
/// true if the operand exists / is added.
- bool addRegisterDead(unsigned IncomingReg, const TargetRegisterInfo *RegInfo,
+ bool addRegisterDead(unsigned Reg, const TargetRegisterInfo *RegInfo,
bool AddIfNotFound = false);
/// addRegisterDefined - We have determined MI defines a register. Make sure
/// there is an operand defining Reg.
- void addRegisterDefined(unsigned IncomingReg,
- const TargetRegisterInfo *RegInfo = 0);
+ void addRegisterDefined(unsigned Reg,
+ const TargetRegisterInfo *RegInfo = nullptr);
/// setPhysRegsDeadExcept - Mark every physreg used by this instruction as
/// dead except those in the UsedRegs list.
bool isSafeToMove(const TargetInstrInfo *TII, AliasAnalysis *AA,
bool &SawStore) const;
- /// isSafeToReMat - Return true if it's safe to rematerialize the specified
- /// instruction which defined the specified register instead of copying it.
- bool isSafeToReMat(const TargetInstrInfo *TII, AliasAnalysis *AA,
- unsigned DstReg) const;
-
/// hasOrderedMemoryRef - Return true if this instruction may have an ordered
/// or volatile memory reference, or if the information describing the memory
/// reference is not available. Return false if it is known to have no
/// copyImplicitOps - Copy implicit register operands from specified
/// instruction to this instruction.
- void copyImplicitOps(const MachineInstr *MI);
+ void copyImplicitOps(MachineFunction &MF, const MachineInstr *MI);
//
// Debugging support
//
- void print(raw_ostream &OS, const TargetMachine *TM = 0) const;
+ void print(raw_ostream &OS, const TargetMachine *TM = nullptr,
+ bool SkipOpers = false) const;
void dump() const;
//===--------------------------------------------------------------------===//
// Accessors used to build up machine instructions.
- /// addOperand - Add the specified operand to the instruction. If it is an
- /// implicit operand, it is added to the end of the operand list. If it is
- /// an explicit operand it is added at the end of the explicit operand list
+ /// Add the specified operand to the instruction. If it is an implicit
+ /// operand, it is added to the end of the operand list. If it is an
+ /// explicit operand it is added at the end of the explicit operand list
/// (before the first implicit operand).
+ ///
+ /// MF must be the machine function that was used to allocate this
+ /// instruction.
+ ///
+ /// MachineInstrBuilder provides a more convenient interface for creating
+ /// instructions and adding operands.
+ void addOperand(MachineFunction &MF, const MachineOperand &Op);
+
+ /// Add an operand without providing an MF reference. This only works for
+ /// instructions that are inserted in a basic block.
+ ///
+ /// MachineInstrBuilder and the two-argument addOperand(MF, MO) should be
+ /// preferred.
void addOperand(const MachineOperand &Op);
/// setDesc - Replace the instruction descriptor (thus opcode) of
/// list. This does not transfer ownership.
void setMemRefs(mmo_iterator NewMemRefs, mmo_iterator NewMemRefsEnd) {
MemRefs = NewMemRefs;
- NumMemRefs = NewMemRefsEnd - NewMemRefs;
+ NumMemRefs = uint8_t(NewMemRefsEnd - NewMemRefs);
+ assert(NumMemRefs == NewMemRefsEnd - NewMemRefs && "Too many memrefs");
}
private:
/// addImplicitDefUseOperands - Add all implicit def and use operands to
/// this instruction.
- void addImplicitDefUseOperands();
+ void addImplicitDefUseOperands(MachineFunction &MF);
/// RemoveRegOperandsFromUseLists - Unlink all of the register operands in
/// this instruction from their respective use lists. This requires that the
/// hasPropertyInBundle - Slow path for hasProperty when we're dealing with a
/// bundle.
bool hasPropertyInBundle(unsigned Mask, QueryType Type) const;
+
+ /// \brief Implements the logic of getRegClassConstraintEffectForVReg for the
+ /// this MI and the given operand index \p OpIdx.
+ /// If the related operand does not constrained Reg, this returns CurRC.
+ const TargetRegisterClass *getRegClassConstraintEffectForVRegImpl(
+ unsigned OpIdx, unsigned Reg, const TargetRegisterClass *CurRC,
+ const TargetInstrInfo *TII, const TargetRegisterInfo *TRI) const;
};
/// MachineInstrExpressionTrait - Special DenseMapInfo traits to compare
/// useful for CSE, etc.
struct MachineInstrExpressionTrait : DenseMapInfo<MachineInstr*> {
static inline MachineInstr *getEmptyKey() {
- return 0;
+ return nullptr;
}
static inline MachineInstr *getTombstoneKey() {
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