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Implement isLoadFromStackSlot and isStoreToStackSlot

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llvm-svn: 25932
This commit is contained in:
Chris Lattner 2006-02-03 06:44:54 +00:00
parent 7c8bab62e5
commit 590c0d8621
2 changed files with 52 additions and 0 deletions
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38
lib/Target/SparcV8/SparcV8InstrInfo.cpp
View File

@ -57,3 +57,41 @@ bool SparcV8InstrInfo::isMoveInstr(const MachineInstr &MI,
}
return false;
}
/// 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 0 if the instruction has
/// any side effects other than loading from the stack slot.
unsigned SparcV8InstrInfo::isLoadFromStackSlot(MachineInstr *MI,
int &FrameIndex) const {
if (MI->getOpcode() == V8::LDri ||
MI->getOpcode() == V8::LDFri ||
MI->getOpcode() == V8::LDDFri) {
if (MI->getOperand(1).isFrameIndex() && MI->getOperand(2).isImmediate() &&
MI->getOperand(2).getImmedValue() == 0) {
FrameIndex = MI->getOperand(1).getFrameIndex();
return MI->getOperand(0).getReg();
}
}
return 0;
}
/// isStoreToStackSlot - If the specified machine instruction is a direct
/// store to a stack slot, return the virtual or physical register number of
/// the source reg along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than storing to the stack slot.
unsigned SparcV8InstrInfo::isStoreToStackSlot(MachineInstr *MI,
int &FrameIndex) const {
if (MI->getOpcode() == V8::STri ||
MI->getOpcode() == V8::STFri ||
MI->getOpcode() == V8::STDFri) {
if (MI->getOperand(0).isFrameIndex() && MI->getOperand(1).isImmediate() &&
MI->getOperand(1).getImmedValue() == 0) {
FrameIndex = MI->getOperand(0).getFrameIndex();
return MI->getOperand(2).getReg();
}
}
return 0;
}

14
lib/Target/SparcV8/SparcV8InstrInfo.h
View File

@ -47,6 +47,20 @@ public:
///
virtual bool isMoveInstr(const MachineInstr &MI,
unsigned &SrcReg, unsigned &DstReg) const;
/// 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 0 if the instruction has
/// any side effects other than loading from the stack slot.
virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
/// isStoreToStackSlot - If the specified machine instruction is a direct
/// store to a stack slot, return the virtual or physical register number of
/// the source reg along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than storing to the stack slot.
virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
};
}