Author: evancheng
Date: Wed Dec 5 12:41:29 2007
New Revision: 44623
URL: http://llvm.org/viewvc/llvm-project?rev=44623&view=rev
Log:
Added canFoldMemoryOperand for PPC.
Modified:
llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.cpp
llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.h
Modified: llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.cpp?rev=44623&r1=44622&r2=44623&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.cpp Wed Dec 5 12:41:29 2007
@@ -613,6 +613,26 @@
return NewMI;
}
+bool PPCRegisterInfo::canFoldMemoryOperand(MachineInstr *MI,
+ SmallVectorImpl<unsigned> &Ops) const
{
+ if (Ops.size() != 1) return NULL;
+
+ // Make sure this is a reg-reg copy. Note that we can't handle MCRF, because
+ // it takes more than one instruction to store it.
+ unsigned Opc = MI->getOpcode();
+
+ if ((Opc == PPC::OR &&
+ MI->getOperand(1).getReg() == MI->getOperand(2).getReg()))
+ return true;
+ else if ((Opc == PPC::OR8 &&
+ MI->getOperand(1).getReg() == MI->getOperand(2).getReg()))
+ return true;
+ else if (Opc == PPC::FMRD || Opc == PPC::FMRS)
+ return true;
+
+ return false;
+}
+
//===----------------------------------------------------------------------===//
// Stack Frame Processing methods
//===----------------------------------------------------------------------===//
Modified: llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.h
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.h?rev=44623&r1=44622&r2=44623&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.h (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCRegisterInfo.h Wed Dec 5 12:41:29 2007
@@ -75,6 +75,9 @@
return 0;
}
+ virtual bool canFoldMemoryOperand(MachineInstr *MI,
+ SmallVectorImpl<unsigned> &Ops) const;
+
const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
const TargetRegisterClass* const*
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