[all-commits] [llvm/llvm-project] 9b9b19: [X86][Disassembler] Reject instructions longer tha...

[Charles Zablit via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9b9b19364dfb5ba2984a0970928b7ad95569e88a
      https://github.com/llvm/llvm-project/commit/9b9b19364dfb5ba2984a0970928b7ad95569e88a
  Author: Charles Zablit <c_zablit at apple.com>
  Date:   2026-07-10 (Fri, 10 Jul 2026)

  Changed paths:
    M llvm/lib/Target/X86/Disassembler/X86Disassembler.cpp
    A llvm/test/MC/Disassembler/X86/x86-64-instruction-length.txt

  Log Message:
  -----------
  [X86][Disassembler] Reject instructions longer than 15 bytes (#208277)

An x86 instruction can be at most 15 bytes. The decoder already checks
for overruns but only emits an `LLVM_DEBUG` message and still returns
`Success`. This patch returns `Fail` instead, so `getInstruction()`
never reports a size
that isn't a valid instruction length.



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