b5046a7fa9
This PR provides implementation of the basic codegen infra such as TargetFrameLowering, MCInstLower, AsmPrinter, RegisterInfo, InstructionInfo, TargetLowering, SelectionDAGISel. Migrated from https://reviews.llvm.org/D145658
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
//===- XtensaISelLowering.cpp - Xtensa DAG Lowering Implementation --------===//
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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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// This file defines the interfaces that Xtensa uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#include "XtensaISelLowering.h"
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#include "XtensaSubtarget.h"
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#include "XtensaTargetMachine.h"
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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#define DEBUG_TYPE "xtensa-lower"
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XtensaTargetLowering::XtensaTargetLowering(const TargetMachine &TM,
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const XtensaSubtarget &STI)
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: TargetLowering(TM), Subtarget(STI) {
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// Set up the register classes.
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addRegisterClass(MVT::i32, &Xtensa::ARRegClass);
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// Set up special registers.
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setStackPointerRegisterToSaveRestore(Xtensa::SP);
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setSchedulingPreference(Sched::RegPressure);
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setMinFunctionAlignment(Align(4));
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// Compute derived properties from the register classes
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computeRegisterProperties(STI.getRegisterInfo());
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}
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SDValue XtensaTargetLowering::LowerOperation(SDValue Op,
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SelectionDAG &DAG) const {
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switch (Op.getOpcode()) {
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default:
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report_fatal_error("Unexpected node to lower");
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}
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}
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const char *XtensaTargetLowering::getTargetNodeName(unsigned Opcode) const {
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return nullptr;
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}
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