[all-commits] [llvm/llvm-project] c808e6: [DebugInfo] Don't emit .loc directive with all val...

[Oliver Stannard via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c808e665ce5a74ed37b807865b92646c4bbbbf3d
      https://github.com/llvm/llvm-project/commit/c808e665ce5a74ed37b807865b92646c4bbbbf3d
  Author: Oliver Stannard <oliver.stannard at arm.com>
  Date:   2024-09-26 (Thu, 26 Sep 2024)

  Changed paths:
    M llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
    A llvm/test/DebugInfo/ARM/align-func-start.ll

  Log Message:
  -----------
  [DebugInfo] Don't emit .loc directive with all values zero (#109978)

When emitting debug info for code alignment, it was possible to emit a
.loc directive with a file number of zero, which is invalid for DWARF 4
and earlier. This happened because getCurrentDwarfLoc() returned a
zero-initialised value when there hadn't been a previous .loc directive
emitted.

---------

Co-authored-by: Paul T Robinson <paul.robinson at sony.com>



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