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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
//===-- XCoreFrameToArgsOffsetElim.cpp ----------------------------*- C++ -*-=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Replace Pseudo FRAME_TO_ARGS_OFFSET with the appropriate real offset.
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//
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//===----------------------------------------------------------------------===//
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#include "XCore.h"
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#include "XCoreInstrInfo.h"
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#include "XCoreSubtarget.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetMachine.h"
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using namespace llvm;
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namespace {
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struct XCoreFTAOElim : public MachineFunctionPass {
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static char ID;
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XCoreFTAOElim() : MachineFunctionPass(ID) {}
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bool runOnMachineFunction(MachineFunction &Fn) override;
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MachineFunctionProperties getRequiredProperties() const override {
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return MachineFunctionProperties().set(
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MachineFunctionProperties::Property::NoVRegs);
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}
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StringRef getPassName() const override {
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return "XCore FRAME_TO_ARGS_OFFSET Elimination";
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}
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};
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char XCoreFTAOElim::ID = 0;
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}
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/// createXCoreFrameToArgsOffsetEliminationPass - returns an instance of the
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/// Frame to args offset elimination pass
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FunctionPass *llvm::createXCoreFrameToArgsOffsetEliminationPass() {
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return new XCoreFTAOElim();
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}
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bool XCoreFTAOElim::runOnMachineFunction(MachineFunction &MF) {
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const XCoreInstrInfo &TII =
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*static_cast<const XCoreInstrInfo *>(MF.getSubtarget().getInstrInfo());
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unsigned StackSize = MF.getFrameInfo().getStackSize();
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for (MachineFunction::iterator MFI = MF.begin(), E = MF.end(); MFI != E;
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++MFI) {
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MachineBasicBlock &MBB = *MFI;
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for (MachineBasicBlock::iterator MBBI = MBB.begin(), EE = MBB.end();
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MBBI != EE; ++MBBI) {
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if (MBBI->getOpcode() == XCore::FRAME_TO_ARGS_OFFSET) {
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MachineInstr &OldInst = *MBBI;
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unsigned Reg = OldInst.getOperand(0).getReg();
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MBBI = TII.loadImmediate(MBB, MBBI, Reg, StackSize);
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OldInst.eraseFromParent();
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}
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}
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}
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return true;
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}
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