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Add a variant of foldMemoryOperand to fold any load / store, not just load / store from / to stack slots.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41597 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-08-30 05:52:20 +00:00
parent 42a0f9a4fb
commit 35b35c5c32
7 changed files with 42 additions and 5 deletions
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12
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@ -242,11 +242,13 @@ namespace llvm {
bool isReMaterializable(const LiveInterval &li, const VNInfo *ValNo,
MachineInstr *MI);
/// tryFoldMemoryOperand - Attempts to fold a spill / restore from slot
/// to reg into ith operand of specified MI. If it is successul, MI is
/// updated with the newly created MI and returns true.
bool tryFoldMemoryOperand(MachineInstr* &MI, VirtRegMap &vrm, unsigned index,
unsigned i, int slot, unsigned reg);
/// tryFoldMemoryOperand - Attempts to fold either a spill / restore from
/// slot / to reg or any rematerialized load into ith operand of specified
/// MI. If it is successul, MI is updated with the newly created MI and
/// returns true.
bool tryFoldMemoryOperand(MachineInstr* &MI, VirtRegMap &vrm,
unsigned index, unsigned i, bool isSS,
MachineInstr *DefMI, int slot, unsigned reg);
static LiveInterval createInterval(unsigned Reg);

9
include/llvm/Target/MRegisterInfo.h
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@ -521,6 +521,15 @@ public:
return 0;
}
/// foldMemoryOperand - Same as the previous version except it allows folding
/// of any load and store from / to any address, not just from a specific
/// stack slot.
virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
unsigned OpNum,
MachineInstr* LoadMI) const {
return 0;
}
/// targetHandlesStackFrameRounding - Returns true if the target is responsible
/// for rounding up the stack frame (probably at emitPrologue time).
virtual bool targetHandlesStackFrameRounding() const {

5
lib/Target/ARM/ARMRegisterInfo.h
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@ -66,6 +66,11 @@ public:
MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
int FrameIndex) const;
MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
MachineInstr* LoadMI) const {
return 0;
}
const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
const TargetRegisterClass* const*

5
lib/Target/Alpha/AlphaRegisterInfo.h
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@ -41,6 +41,11 @@ struct AlphaRegisterInfo : public AlphaGenRegisterInfo {
MachineInstr* foldMemoryOperand(MachineInstr *MI, unsigned OpNum,
int FrameIndex) const;
MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
MachineInstr* LoadMI) const {
return 0;
}
void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned SrcReg,
const TargetRegisterClass *RC) const;

5
lib/Target/Mips/MipsRegisterInfo.h
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@ -48,6 +48,11 @@ struct MipsRegisterInfo : public MipsGenRegisterInfo {
MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
int FrameIndex) const;
MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
MachineInstr* LoadMI) const {
return 0;
}
void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned SrcReg,
const TargetRegisterClass *RC) const;

5
lib/Target/PowerPC/PPCRegisterInfo.h
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@ -57,6 +57,11 @@ public:
virtual MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
int FrameIndex) const;
virtual MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
MachineInstr* LoadMI) const {
return 0;
}
const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
const TargetRegisterClass* const*

6
lib/Target/Sparc/SparcRegisterInfo.h
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@ -51,6 +51,12 @@ struct SparcRegisterInfo : public SparcGenRegisterInfo {
unsigned OpNum,
int FrameIndex) const;
virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
unsigned OpNum,
MachineInstr* LoadMI) const {
return 0;
}
const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
const TargetRegisterClass* const* getCalleeSavedRegClasses(