#include "llvm/Target/TargetInstrDesc.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
namespace llvm {
/// hasLoadFromStackSlot - If the specified machine instruction has
/// a load from a stack slot, return true along with the FrameIndex
- /// of the loaded stack slot. If not, return false. Unlike
+ /// of the loaded stack slot and the machine mem operand containing
+ /// the reference. If not, return false. Unlike
/// isLoadFromStackSlot, this returns true for any instructions that
/// loads from the stack. This is just a hint, as some cases may be
/// missed.
virtual bool hasLoadFromStackSlot(const MachineInstr *MI,
+ const MachineMemOperand *&MMO,
int &FrameIndex) const {
return 0;
}
/// stack locations as well. This uses a heuristic so it isn't
/// reliable for correctness.
virtual unsigned isStoreToStackSlotPostFE(const MachineInstr *MI,
- int &FrameIndex) const {
+ int &FrameIndex) const {
return 0;
}
/// hasStoreToStackSlot - If the specified machine instruction has a
/// store to a stack slot, return true along with the FrameIndex of
- /// the loaded stack slot. If not, return false. Unlike
- /// isStoreToStackSlot, this returns true for any instructions that
- /// loads from the stack. This is just a hint, as some cases may be
- /// missed.
+ /// the loaded stack slot and the machine mem operand containing the
+ /// reference. If not, return false. Unlike isStoreToStackSlot,
+ /// this returns true for any instructions that loads from the
+ /// stack. This is just a hint, as some cases may be missed.
virtual bool hasStoreToStackSlot(const MachineInstr *MI,
+ const MachineMemOperand *&MMO,
int &FrameIndex) const {
return 0;
}
/// length.
virtual unsigned getInlineAsmLength(const char *Str,
const MCAsmInfo &MAI) const;
+
+ /// TailDuplicationLimit - Returns the limit on the number of instructions
+ /// in basic block MBB beyond which it will not be tail-duplicated.
+ virtual unsigned TailDuplicationLimit(const MachineBasicBlock &MBB,
+ unsigned DefaultLimit) const {
+ return DefaultLimit;
+ }
};
/// TargetInstrInfoImpl - This is the default implementation of