[all-commits] [llvm/llvm-project] fb21ef: [SystemZ] Support PrintBranchImmAsAddress in disas...

[Ulrich Weigand via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fb21efa258d84a159a5951c3cc8184edfe5ba796
      https://github.com/llvm/llvm-project/commit/fb21efa258d84a159a5951c3cc8184edfe5ba796
  Author: Ulrich Weigand <ulrich.weigand at de.ibm.com>
  Date:   2025-05-22 (Thu, 22 May 2025)

  Changed paths:
    M llvm/lib/Target/SystemZ/Disassembler/SystemZDisassembler.cpp
    M llvm/lib/Target/SystemZ/MCTargetDesc/SystemZInstPrinterCommon.cpp
    M llvm/lib/Target/SystemZ/MCTargetDesc/SystemZInstPrinterCommon.h
    R llvm/test/MC/Disassembler/SystemZ/insns-pcrel.txt
    M llvm/test/MC/Disassembler/SystemZ/insns-z13-bad.txt
    M llvm/test/MC/Disassembler/SystemZ/insns-z13.txt
    M llvm/test/MC/Disassembler/SystemZ/insns-z14.txt
    M llvm/test/MC/Disassembler/SystemZ/insns-z15.txt
    M llvm/test/MC/Disassembler/SystemZ/insns-z16.txt
    M llvm/test/MC/Disassembler/SystemZ/insns-z17.txt
    M llvm/test/MC/Disassembler/SystemZ/insns.txt
    M llvm/test/MC/Disassembler/SystemZ/marked-up.txt

  Log Message:
  -----------
  [SystemZ] Support PrintBranchImmAsAddress in disassembler (#141064)

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.



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