[all-commits] [llvm/llvm-project] c06483: [ARM] Reject invalid BF encoding when target is ne...

[Hamza Khan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c06483c6fb9fc84bed1ae33172323c9aa57a3ca4
      https://github.com/llvm/llvm-project/commit/c06483c6fb9fc84bed1ae33172323c9aa57a3ca4
  Author: Hamza Khan <99187565+HamzaKodez at users.noreply.github.com>
  Date:   2026-06-08 (Mon, 08 Jun 2026)

  Changed paths:
    M llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
    A llvm/test/MC/ARM/bf-invalid-target.s

  Log Message:
  -----------
  [ARM] Reject invalid BF encoding when target is next instruction (#201533)

When the BF instruction targets the immediately following label, the
encoded branch offset becomes zero, causing LLVM to emit invalid machine
code.

Add validation in the fixup_bf_branch path to reject this case and emit
an error instead.

Add MC regression test to cover new validation.

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