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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
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
//===-- ARMFeatures.h - Checks for ARM instruction features -----*- 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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// This file contains the code shared between ARM CodeGen and ARM MC
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_ARM_ARMFEATURES_H
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#define LLVM_LIB_TARGET_ARM_ARMFEATURES_H
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#include "MCTargetDesc/ARMMCTargetDesc.h"
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namespace llvm {
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template<typename InstrType> // could be MachineInstr or MCInst
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bool IsCPSRDead(const InstrType *Instr);
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template<typename InstrType> // could be MachineInstr or MCInst
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inline bool isV8EligibleForIT(const InstrType *Instr) {
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switch (Instr->getOpcode()) {
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default:
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return false;
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case ARM::tADC:
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case ARM::tADDi3:
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case ARM::tADDi8:
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case ARM::tADDrr:
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case ARM::tAND:
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case ARM::tASRri:
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case ARM::tASRrr:
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case ARM::tBIC:
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case ARM::tEOR:
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case ARM::tLSLri:
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case ARM::tLSLrr:
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case ARM::tLSRri:
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case ARM::tLSRrr:
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case ARM::tMOVi8:
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case ARM::tMUL:
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case ARM::tMVN:
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case ARM::tORR:
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case ARM::tROR:
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case ARM::tRSB:
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case ARM::tSBC:
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case ARM::tSUBi3:
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case ARM::tSUBi8:
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case ARM::tSUBrr:
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// Outside of an IT block, these set CPSR.
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return IsCPSRDead(Instr);
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case ARM::tADDrSPi:
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case ARM::tCMNz:
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case ARM::tCMPi8:
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case ARM::tCMPr:
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case ARM::tLDRBi:
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case ARM::tLDRBr:
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case ARM::tLDRHi:
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case ARM::tLDRHr:
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case ARM::tLDRSB:
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case ARM::tLDRSH:
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case ARM::tLDRi:
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case ARM::tLDRr:
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case ARM::tLDRspi:
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case ARM::tSTRBi:
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case ARM::tSTRBr:
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case ARM::tSTRHi:
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case ARM::tSTRHr:
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case ARM::tSTRi:
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case ARM::tSTRr:
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case ARM::tSTRspi:
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case ARM::tTST:
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return true;
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// there are some "conditionally deprecated" opcodes
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case ARM::tADDspr:
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case ARM::tBLXr:
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return Instr->getOperand(2).getReg() != ARM::PC;
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// ADD PC, SP and BLX PC were always unpredictable,
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// now on top of it they're deprecated
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case ARM::tADDrSP:
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case ARM::tBX:
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return Instr->getOperand(0).getReg() != ARM::PC;
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case ARM::tADDhirr:
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return Instr->getOperand(0).getReg() != ARM::PC &&
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Instr->getOperand(2).getReg() != ARM::PC;
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case ARM::tCMPhir:
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case ARM::tMOVr:
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return Instr->getOperand(0).getReg() != ARM::PC &&
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Instr->getOperand(1).getReg() != ARM::PC;
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}
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}
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}
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#endif
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