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add a new callback

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23373 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-17 01:02:45 +00:00
parent 452d7bebaa
commit 7d3041e060
1 changed files with 8 additions and 0 deletions
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8
include/llvm/Target/MRegisterInfo.h
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@ -250,6 +250,14 @@ public:
unsigned DestReg, unsigned SrcReg,
const TargetRegisterClass *RC) const = 0;
/// isLoadFromStackSlot - If the specified machine instruction is a direct
/// load from a stack slot, return the virtual or physical register number of
/// the destination along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return false if the instruction has
/// any side effects other than loading from the stack slot.
virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const{
return 0;
}
/// foldMemoryOperand - Attempt to fold a load or store of the
/// specified stack slot into the specified machine instruction for