[all-commits] [llvm/llvm-project] 0ab350: [RISC-V][MC] Fix mapping symbol section tracking o...

[Alexander Richardson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0ab3502ec56a5d8330c79849945b9fefd2668f01
      https://github.com/llvm/llvm-project/commit/0ab3502ec56a5d8330c79849945b9fefd2668f01
  Author: Alexander Richardson <alexrichardson at google.com>
  Date:   2026-09-26 (Sat, 26 Sep 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
    M llvm/test/MC/RISCV/mapping-across-sections.s

  Log Message:
  -----------
  [RISC-V][MC] Fix mapping symbol section tracking on popSection() (#225131)

Previously, RISCVELFStreamer::changeSection() saved LastEMS and LastEmittedArch
under getPreviousSection().first instead of getCurrentSection().first. When
MCStreamer::popSection() switches back to a previous section,
getPreviousSection() already points to the destination section being restored
rather than the section being exited. This clobbered the destination section's
saved mapping symbol state and caused duplicate `$x<arch>` mapping symbols to
be emitted whenever returning to `.text`.

Use getCurrentSection().first instead, matching AArch64ELFStreamer and
ARMELFStreamer.

This commit was created with the help of AI tools

Pull-Request: https://github.com/llvm/llvm-project/pull/225131



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