[all-commits] [llvm/llvm-project] 24f0b6: [llvm-objdump] avoid crash disassembling unknown i...

[sjoerdmeijer via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 24f0b6b6d8e798f76621af9ea6ccda0568d28703
      https://github.com/llvm/llvm-project/commit/24f0b6b6d8e798f76621af9ea6ccda0568d28703
  Author: Sjoerd Meijer <sjoerd.meijer at arm.com>
  Date:   2020-01-31 (Fri, 31 Jan 2020)

  Changed paths:
    A llvm/test/tools/llvm-objdump/ARM/unknown-instr.test
    M llvm/tools/llvm-objdump/llvm-objdump.cpp

  Log Message:
  -----------
  [llvm-objdump] avoid crash disassembling unknown instruction

Disassembly of instructions can fail when llvm-objdump is not given the right set of
architecture features, for example when the source is compiled with:

  clang -march=..+ext1+ext2

and disassembly is attempted with:

  llvm-objdump -mattr=+ext1

This patch avoids further analysing unknown instructions (as was happening
before) when disassembly has failed.

Differential Revision: https://reviews.llvm.org/D73531