fb21efa258
As noticed in https://github.com/llvm/llvm-project/pull/140471, the SystemZ target currently implements disassembly of PC-relative target addresses differently from other back-ends. This patch brings SystemZ in line with other targets. Specifically, this patch changes the relevant MCInst instructions to carry a PC-relative displacement instead of an absolute target address in their immediate fields. When printing the instruction, this displacement will either be shown as is (e.g. for llvm-mc), or else translated into an absolute address at print time (e.g. for llvm-objdump). The existing llvm-mc based tests using PC-relative operands no longer work and have to be rewritten, but printing displacements makes those tests easier to maintain anyway.
87 lines
3.8 KiB
C++
87 lines
3.8 KiB
C++
//== SystemZInstPrinterCommon.h - Common SystemZ InstPrinter funcs *- 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 class prints a SystemZ MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZINSTPRINTERCOMMON_H
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#define LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZINSTPRINTERCOMMON_H
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#include "SystemZMCAsmInfo.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCRegister.h"
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#include <cstdint>
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namespace llvm {
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class MCOperand;
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class SystemZInstPrinterCommon : public MCInstPrinter {
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public:
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SystemZInstPrinterCommon(const MCAsmInfo &MAI, const MCInstrInfo &MII,
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const MCRegisterInfo &MRI)
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: MCInstPrinter(MAI, MII, MRI) {}
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// Print an address with the given base, displacement and index.
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void printAddress(const MCAsmInfo *MAI, MCRegister Base,
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const MCOperand &DispMO, MCRegister Index, raw_ostream &O);
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// Print the given operand.
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void printOperand(const MCOperand &MO, const MCAsmInfo *MAI, raw_ostream &O);
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virtual void printFormattedRegName(const MCAsmInfo *MAI, MCRegister Reg,
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raw_ostream &O) {}
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// Override MCInstPrinter.
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void printRegName(raw_ostream &O, MCRegister Reg) override;
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protected:
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template <unsigned N>
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void printUImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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template <unsigned N>
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void printSImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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// Print various types of operand.
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void printOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printOperand(const MCInst *MI, uint64_t /*Address*/, unsigned OpNum,
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raw_ostream &O) {
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printOperand(MI, OpNum, O);
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}
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void printBDAddrOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printBDXAddrOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printBDLAddrOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printBDRAddrOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printBDVAddrOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printLXAAddrOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU1ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU2ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU3ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU4ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printS8ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU8ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU12ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printS16ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU16ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printS32ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU32ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printU48ImmOperand(const MCInst *MI, int OpNum, raw_ostream &O);
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void printPCRelOperand(const MCInst *MI, uint64_t Address, int OpNum,
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raw_ostream &O);
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void printPCRelTLSOperand(const MCInst *MI, uint64_t Address, int OpNum,
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raw_ostream &O);
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// Print the mnemonic for a condition-code mask ("ne", "lh", etc.)
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// This forms part of the instruction name rather than the operand list.
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void printCond4Operand(const MCInst *MI, int OpNum, raw_ostream &O);
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZINSTPRINTERCOMMON_H
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