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Add MachineRegisterInfo::moveOperands().

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This function works like memmove() for MachineOperands, except it also
updates any use-def chains containing the moved operands.

The use-def chains are updated without affecting the order of operands
in the list. That isn't possible when using the
removeRegOperandFromUseList() and addRegOperandToUseList() functions.

Callers to follow soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171597 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2013-01-05 04:38:12 +00:00
parent 64e407be0d
commit bced5cd924
2 changed files with 52 additions and 0 deletions
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3
include/llvm/CodeGen/MachineRegisterInfo.h
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@@ -156,6 +156,9 @@ public:
// Strictly for use by MachineInstr.cpp.
void removeRegOperandFromUseList(MachineOperand *MO);
// Strictly for use by MachineInstr.cpp.
void moveOperands(MachineOperand *Dst, MachineOperand *Src, unsigned NumOps);
/// reg_begin/reg_end - Provide iteration support to walk over all definitions
/// and uses of a register within the MachineFunction that corresponds to this
/// MachineRegisterInfo object.