/// ReMaterializeTrivialDef - If the source of a copy is defined by a trivial
/// computation, replace the copy by rematerialize the definition.
bool ReMaterializeTrivialDef(LiveInterval &SrcInt, unsigned DstReg,
- MachineInstr *CopyMI);
-
- /// TurnCopyIntoImpDef - If source of the specified copy is an implicit def,
- /// turn the copy into an implicit def.
- bool TurnCopyIntoImpDef(MachineBasicBlock::iterator &I,
- MachineBasicBlock *MBB,
- unsigned DstReg, unsigned SrcReg);
+ unsigned DstSubIdx, MachineInstr *CopyMI);
/// CanCoalesceWithImpDef - Returns true if the specified copy instruction
/// from an implicit def to another register can be coalesced away.
bool CanCoalesceWithImpDef(MachineInstr *CopyMI,
LiveInterval &li, LiveInterval &ImpLi) const;
- /// RemoveCopiesFromValNo - The specified value# is defined by an implicit
- /// def and it is being removed. Turn all copies from this value# into
- /// identity copies so they will be removed.
- void RemoveCopiesFromValNo(LiveInterval &li, VNInfo *VNI);
+ /// TurnCopiesFromValNoToImpDefs - The specified value# is defined by an
+ /// implicit_def and it is being removed. Turn all copies from this value#
+ /// into implicit_defs.
+ void TurnCopiesFromValNoToImpDefs(LiveInterval &li, VNInfo *VNI);
/// isWinToJoinVRWithSrcPhysReg - Return true if it's worth while to join a
/// a virtual destination register with physical source register.
/// subregister.
void UpdateRegDefsUses(unsigned SrcReg, unsigned DstReg, unsigned SubIdx);
- /// RemoveDeadImpDef - Remove implicit_def instructions which are
- /// "re-defining" registers due to insert_subreg coalescing. e.g.
- void RemoveDeadImpDef(unsigned Reg, LiveInterval &LI);
-
/// RemoveUnnecessaryKills - Remove kill markers that are no longer accurate
/// due to live range lengthening as the result of coalescing.
void RemoveUnnecessaryKills(unsigned Reg, LiveInterval &LI);