Implement isLoadFromStackSlot and isStoreToStackSlot
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25932 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcInstrInfo.cpp b/lib/Target/Sparc/SparcInstrInfo.cpp
index d63be35..6faa972 100644
--- a/lib/Target/Sparc/SparcInstrInfo.cpp
+++ b/lib/Target/Sparc/SparcInstrInfo.cpp
@@ -57,3 +57,41 @@
}
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;
+}
diff --git a/lib/Target/Sparc/SparcInstrInfo.h b/lib/Target/Sparc/SparcInstrInfo.h
index dc4cf0f..067fb91 100644
--- a/lib/Target/Sparc/SparcInstrInfo.h
+++ b/lib/Target/Sparc/SparcInstrInfo.h
@@ -47,6 +47,20 @@
///
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;
};
}
diff --git a/lib/Target/SparcV8/SparcV8InstrInfo.cpp b/lib/Target/SparcV8/SparcV8InstrInfo.cpp
index d63be35..6faa972 100644
--- a/lib/Target/SparcV8/SparcV8InstrInfo.cpp
+++ b/lib/Target/SparcV8/SparcV8InstrInfo.cpp
@@ -57,3 +57,41 @@
}
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;
+}
diff --git a/lib/Target/SparcV8/SparcV8InstrInfo.h b/lib/Target/SparcV8/SparcV8InstrInfo.h
index dc4cf0f..067fb91 100644
--- a/lib/Target/SparcV8/SparcV8InstrInfo.h
+++ b/lib/Target/SparcV8/SparcV8InstrInfo.h
@@ -47,6 +47,20 @@
///
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;
};
}