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

[Alexander Richardson via All-commits]

  Branch: refs/heads/users/arichardson/risc-v-mc-fix-mapping-symbol-section-tracking-on-popsection
  Home:   https://github.com/llvm/llvm-project
  Commit: aaadfa4ea365f743cc079765c51a196b0bb8f159
      https://github.com/llvm/llvm-project/commit/aaadfa4ea365f743cc079765c51a196b0bb8f159
  Author: Alex Richardson <alexrichardson at google.com>
  Date:   2026-09-21 (Mon, 21 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()

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.

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