#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineOperand.h"
-#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/Target/TargetInstrDesc.h"
#include "llvm/Support/DebugLoc.h"
-#include <list>
#include <vector>
namespace llvm {
+class AliasAnalysis;
class TargetInstrDesc;
class TargetInstrInfo;
class TargetRegisterInfo;
class MachineFunction;
+class MachineMemOperand;
//===----------------------------------------------------------------------===//
/// MachineInstr - Representation of each machine instruction.
///
class MachineInstr : public ilist_node<MachineInstr> {
+public:
+ typedef MachineMemOperand **mmo_iterator;
+
+private:
const TargetInstrDesc *TID; // Instruction descriptor.
unsigned short NumImplicitOps; // Number of implicit operands (which
// are determined at construction time).
+ unsigned short AsmPrinterFlags; // Various bits of information used by
+ // the AsmPrinter to emit helpful
+ // comments. This is *not* semantic
+ // information. Do not use this for
+ // anything other than to convey comment
+ // information to AsmPrinter.
+
std::vector<MachineOperand> Operands; // the operands
- std::list<MachineMemOperand> MemOperands; // information on memory references
+ mmo_iterator MemRefs; // information on memory references
+ mmo_iterator MemRefsEnd;
MachineBasicBlock *Parent; // Pointer to the owning basic block.
DebugLoc debugLoc; // Source line information.
const MachineBasicBlock* getParent() const { return Parent; }
MachineBasicBlock* getParent() { return Parent; }
+ /// getAsmPrinterFlags - Return the asm printer flags bitvector.
+ ///
+ unsigned short getAsmPrinterFlags() const { return AsmPrinterFlags; }
+
+ /// getAsmPrinterFlag - Return whether an AsmPrinter flag is set.
+ ///
+ bool getAsmPrinterFlag(AsmPrinter::CommentFlag Flag) const {
+ return AsmPrinterFlags & Flag;
+ }
+
+ /// setAsmPrinterFlag - Set a flag for the AsmPrinter.
+ ///
+ void setAsmPrinterFlag(unsigned short Flag) {
+ AsmPrinterFlags |= Flag;
+ }
+
/// getDebugLoc - Returns the debug location id of this MachineInstr.
///
DebugLoc getDebugLoc() const { return debugLoc; }
unsigned getNumExplicitOperands() const;
/// Access to memory operands of the instruction
- std::list<MachineMemOperand>::iterator memoperands_begin()
- { return MemOperands.begin(); }
- std::list<MachineMemOperand>::iterator memoperands_end()
- { return MemOperands.end(); }
- std::list<MachineMemOperand>::const_iterator memoperands_begin() const
- { return MemOperands.begin(); }
- std::list<MachineMemOperand>::const_iterator memoperands_end() const
- { return MemOperands.end(); }
- bool memoperands_empty() const { return MemOperands.empty(); }
+ mmo_iterator memoperands_begin() const { return MemRefs; }
+ mmo_iterator memoperands_end() const { return MemRefsEnd; }
+ bool memoperands_empty() const { return MemRefsEnd == MemRefs; }
/// hasOneMemOperand - Return true if this instruction has exactly one
/// MachineMemOperand.
bool hasOneMemOperand() const {
- return !memoperands_empty() &&
- next(memoperands_begin()) == memoperands_end();
+ return MemRefsEnd - MemRefs == 1;
}
/// isIdenticalTo - Return true if this instruction is identical to (same
}
/// findRegisterUseOperandIdx() - Returns the operand index that is a use of
- /// the specific register or -1 if it is not found. It further tightening
+ /// 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;
bool addRegisterKilled(unsigned IncomingReg,
const TargetRegisterInfo *RegInfo,
bool AddIfNotFound = false);
-
+
/// addRegisterDead - We have determined MI defined a register without a use.
/// 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
bool addRegisterDead(unsigned IncomingReg, 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);
+
/// isSafeToMove - Return true if it is safe to move this instruction. If
/// SawStore is set to true, it means that there is a store (or call) between
/// the instruction's location and its intended destination.
- bool isSafeToMove(const TargetInstrInfo *TII, bool &SawStore) const;
+ bool isSafeToMove(const TargetInstrInfo *TII, bool &SawStore,
+ AliasAnalysis *AA) 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, unsigned DstReg) const;
+ bool isSafeToReMat(const TargetInstrInfo *TII, unsigned DstReg,
+ AliasAnalysis *AA) const;
/// hasVolatileMemoryRef - Return true if this instruction may have a
/// volatile memory reference, or if the information describing the
/// have no volatile memory references.
bool hasVolatileMemoryRef() const;
+ /// isInvariantLoad - Return true if this instruction is loading from a
+ /// location whose value is invariant across the function. For example,
+ /// loading a value from the constant pool or from from the argument area of
+ /// a function if it does not change. This should only return true of *all*
+ /// loads the instruction does are invariant (if it does multiple loads).
+ bool isInvariantLoad(AliasAnalysis *AA) const;
+
+ /// isConstantValuePHI - If the specified instruction is a PHI that always
+ /// merges together the same virtual register, return the register, otherwise
+ /// return 0.
+ unsigned isConstantValuePHI() const;
+
//
// Debugging support
//
///
void RemoveOperand(unsigned i);
- /// addMemOperand - Add a MachineMemOperand to the machine instruction,
- /// referencing arbitrary storage.
- void addMemOperand(MachineFunction &MF,
- const MachineMemOperand &MO);
+ /// addMemOperand - Add a MachineMemOperand to the machine instruction.
+ /// This function should be used only occasionally. The setMemRefs function
+ /// is the primary method for setting up a MachineInstr's MemRefs list.
+ void addMemOperand(MachineFunction &MF, MachineMemOperand *MO);
- /// clearMemOperands - Erase all of this MachineInstr's MachineMemOperands.
- void clearMemOperands(MachineFunction &MF);
+ /// setMemRefs - Assign this MachineInstr's memory reference descriptor
+ /// list. This does not transfer ownership.
+ void setMemRefs(mmo_iterator NewMemRefs, mmo_iterator NewMemRefsEnd) {
+ MemRefs = NewMemRefs;
+ MemRefsEnd = NewMemRefsEnd;
+ }
private:
/// getRegInfo - If this instruction is embedded into a MachineFunction,
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