[all-commits] [llvm/llvm-project] be5734: [DebugInfo][InstrRef] Don't fire assertions if deb...

[Jeremy Morse via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: be5734ddaae3521f8ccf3dbf4e747f51aa448936
      https://github.com/llvm/llvm-project/commit/be5734ddaae3521f8ccf3dbf4e747f51aa448936
  Author: Jeremy Morse <jeremy.morse at sony.com>
  Date:   2022-02-10 (Thu, 10 Feb 2022)

  Changed paths:
    M llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
    M llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
    A llvm/test/DebugInfo/MIR/InstrRef/livedebugvalues_illegal_locs.mir

  Log Message:
  -----------
  [DebugInfo][InstrRef] Don't fire assertions if debug-info is faulty

It's inevitable that optimisation passes will fail to update debug-info:
when that happens, it's best if the compiler doesn't crash as a result.
Therefore, downgrade a few assertions / failure modes that would crash
when illegal debug-info was seen, to instead drop variable locations. In
practice this means that an instruction reference to a nonexistant or
illegal operand should be tolerated.

Differential Revision: https://reviews.llvm.org/D118998