diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp | 25 | ||||
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZInstrInfo.h | 2 |
2 files changed, 27 insertions, 0 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp index 81d72e05740..cfd270ae434 100644 --- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp +++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp @@ -104,6 +104,31 @@ unsigned SystemZInstrInfo::isStoreToStackSlot(const MachineInstr *MI, return isSimpleMove(MI, FrameIndex, SystemZII::SimpleBDXStore); } +bool SystemZInstrInfo::isStackSlotCopy(const MachineInstr *MI, + int &DestFrameIndex, + int &SrcFrameIndex) const { + // Check for MVC 0(Length,FI1),0(FI2) + const MachineFrameInfo *MFI = MI->getParent()->getParent()->getFrameInfo(); + if (MI->getOpcode() != SystemZ::MVC || + !MI->getOperand(0).isFI() || + MI->getOperand(1).getImm() != 0 || + !MI->getOperand(3).isFI() || + MI->getOperand(4).getImm() != 0) + return false; + + // Check that Length covers the full slots. + int64_t Length = MI->getOperand(2).getImm(); + unsigned FI1 = MI->getOperand(0).getIndex(); + unsigned FI2 = MI->getOperand(3).getIndex(); + if (MFI->getObjectSize(FI1) != Length || + MFI->getObjectSize(FI2) != Length) + return false; + + DestFrameIndex = FI1; + SrcFrameIndex = FI2; + return true; +} + bool SystemZInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB, diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.h b/llvm/lib/Target/SystemZ/SystemZInstrInfo.h index 11d486cafba..3fe71d88547 100644 --- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.h +++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.h @@ -91,6 +91,8 @@ public: int &FrameIndex) const LLVM_OVERRIDE; virtual unsigned isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const LLVM_OVERRIDE; + virtual bool isStackSlotCopy(const MachineInstr *MI, int &DestFrameIndex, + int &SrcFrameIndex) const LLVM_OVERRIDE; virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB, |
