| //===-- XCoreFrameToArgsOffsetElim.cpp ----------------------------*- C++ -*-=// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Replace Pseudo FRAME_TO_ARGS_OFFSET with the appropriate real offset. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "XCore.h" |
| #include "XCoreInstrInfo.h" |
| #include "XCoreSubtarget.h" |
| #include "llvm/CodeGen/MachineFrameInfo.h" |
| #include "llvm/CodeGen/MachineFunctionPass.h" |
| #include "llvm/CodeGen/MachineInstrBuilder.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/Target/TargetMachine.h" |
| using namespace llvm; |
| |
| namespace { |
| struct XCoreFTAOElim : public MachineFunctionPass { |
| static char ID; |
| XCoreFTAOElim() : MachineFunctionPass(ID) {} |
| |
| bool runOnMachineFunction(MachineFunction &Fn) override; |
| MachineFunctionProperties getRequiredProperties() const override { |
| return MachineFunctionProperties().set( |
| MachineFunctionProperties::Property::NoVRegs); |
| } |
| |
| StringRef getPassName() const override { |
| return "XCore FRAME_TO_ARGS_OFFSET Elimination"; |
| } |
| }; |
| char XCoreFTAOElim::ID = 0; |
| } |
| |
| /// createXCoreFrameToArgsOffsetEliminationPass - returns an instance of the |
| /// Frame to args offset elimination pass |
| FunctionPass *llvm::createXCoreFrameToArgsOffsetEliminationPass() { |
| return new XCoreFTAOElim(); |
| } |
| |
| bool XCoreFTAOElim::runOnMachineFunction(MachineFunction &MF) { |
| const XCoreInstrInfo &TII = |
| *static_cast<const XCoreInstrInfo *>(MF.getSubtarget().getInstrInfo()); |
| unsigned StackSize = MF.getFrameInfo().getStackSize(); |
| for (MachineFunction::iterator MFI = MF.begin(), E = MF.end(); MFI != E; |
| ++MFI) { |
| MachineBasicBlock &MBB = *MFI; |
| for (MachineBasicBlock::iterator MBBI = MBB.begin(), EE = MBB.end(); |
| MBBI != EE; ++MBBI) { |
| if (MBBI->getOpcode() == XCore::FRAME_TO_ARGS_OFFSET) { |
| MachineInstr &OldInst = *MBBI; |
| unsigned Reg = OldInst.getOperand(0).getReg(); |
| MBBI = TII.loadImmediate(MBB, MBBI, Reg, StackSize); |
| OldInst.eraseFromParent(); |
| } |
| } |
| } |
| return true; |
| } |