#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/CodeGen/MachineOperand.h"
-#include "llvm/InlineAsm.h"
+#include "llvm/IR/InlineAsm.h"
#include "llvm/MC/MCInstrDesc.h"
+#include "llvm/Support/ArrayRecycler.h"
#include "llvm/Support/DebugLoc.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;
NoFlags = 0,
FrameSetup = 1 << 0, // Instruction is used as a part of
// function frame setup code.
- InsideBundle = 1 << 1 // Instruction is inside a bundle (not
- // the first MI in a bundle)
+ BundledPred = 1 << 1, // Instruction has bundled predecessors.
+ BundledSucc = 1 << 2 // Instruction has bundled successors.
};
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 in the given MachineFunction.
MachineInstr(MachineFunction &, const MachineInstr &);
- /// MachineInstr ctor - This constructor creates a dummy MachineInstr with
- /// MCID NULL and no operands.
- 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 ctor - Work exactly the same as the ctor above, except that
- /// the MachineInstr is created and added to the end of the specified basic
- /// block.
- MachineInstr(MachineBasicBlock *MBB, const DebugLoc dl,
- const MCInstrDesc &MCID);
-
- ~MachineInstr();
+ MachineInstr(MachineFunction&, const MCInstrDesc &MCID,
+ const DebugLoc dl, bool NoImp = false);
// MachineInstrs are pool-allocated and owned by MachineFunction.
friend class MachineFunction;
}
void setFlags(unsigned flags) {
- Flags = flags;
+ // Filter out the automatically maintained flags.
+ unsigned Mask = BundledPred | BundledSucc;
+ Flags = (Flags & Mask) | (flags & ~Mask);
}
/// clearFlag - Clear a MI flag.
/// The first instruction has the special opcode "BUNDLE". It's not "inside"
/// a bundle, but the next three MIs are.
bool isInsideBundle() const {
- return getFlag(InsideBundle);
- }
-
- /// setIsInsideBundle - Set InsideBundle bit.
- ///
- void setIsInsideBundle(bool Val = true) {
- if (Val)
- setFlag(InsideBundle);
- else
- clearFlag(InsideBundle);
+ return getFlag(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.
+ bool isBundledWithPred() const { return getFlag(BundledPred); }
+
+ /// Return true if this instruction is part of a bundle, and it is not the
+ /// last instruction in the bundle.
+ bool isBundledWithSucc() const { return getFlag(BundledSucc); }
+
+ /// Bundle this instruction with its predecessor. This can be an unbundled
+ /// instruction, or it can be the first instruction in a bundle.
+ void bundleWithPred();
+
+ /// Bundle this instruction with its successor. This can be an unbundled
+ /// instruction, or it can be the last instruction in a bundle.
+ void bundleWithSucc();
+
+ /// Break bundle above this instruction.
+ void unbundleFromPred();
+
+ /// Break bundle below this instruction.
+ void unbundleFromSucc();
/// getDebugLoc - Returns the debug location id of this MachineInstr.
///
/// 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; }
/// Access to memory operands of the instruction
mmo_iterator memoperands_begin() const { return MemRefs; }
/// 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 {
bool isIdenticalTo(const MachineInstr *Other,
MICheckType Check = CheckDefs) const;
- /// removeFromParent - This method unlinks 'this' from the containing basic
- /// block, and returns it, but does not delete it.
+ /// Unlink 'this' from the containing basic block, and return it without
+ /// deleting it.
+ ///
+ /// This function can not be used on bundled instructions, use
+ /// removeFromBundle() to remove individual instructions from a bundle.
MachineInstr *removeFromParent();
- /// eraseFromParent - This method unlinks 'this' from the containing basic
- /// block and deletes it.
+ /// Unlink this instruction from its basic block and return it without
+ /// deleting it.
+ ///
+ /// If the instruction is part of a bundle, the other instructions in the
+ /// bundle remain bundled.
+ MachineInstr *removeFromBundle();
+
+ /// Unlink 'this' from the containing basic block and delete it.
+ ///
+ /// If this instruction is the header of a bundle, the whole bundle is erased.
+ /// This function can not be used for instructions inside a bundle, use
+ /// eraseFromBundle() to erase individual bundled instructions.
void eraseFromParent();
+ /// 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();
+
/// isLabel - Returns true if the MachineInstr represents a label.
///
bool isLabel() const {
bool isEHLabel() const { return getOpcode() == TargetOpcode::EH_LABEL; }
bool isGCLabel() const { return getOpcode() == TargetOpcode::GC_LABEL; }
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 {
}
}
- /// 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
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.
///
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 = 0);
/// 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 = 0,
+ 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
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