[all-commits] [llvm/llvm-project] a78d13: [LLVM][DWARF] Change .debug_names abbrev to be an ...

[Alexander Yermolovich via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a78d13d0786bc81058ee9aaa7d1c854ee19cee48
      https://github.com/llvm/llvm-project/commit/a78d13d0786bc81058ee9aaa7d1c854ee19cee48
  Author: Alexander Yermolovich <43973793+ayermolo at users.noreply.github.com>
  Date:   2024-02-14 (Wed, 14 Feb 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/AccelTable.h
    M llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
    M llvm/test/DebugInfo/X86/debug-names-dwarf64.ll
    M llvm/test/DebugInfo/X86/debug-names-types.ll
    M llvm/test/tools/dsymutil/ARM/dwarf5-dwarf4-combination-macho.test

  Log Message:
  -----------
  [LLVM][DWARF] Change .debug_names abbrev to be an index (#81200)

Based on the discussion in
https://github.com/llvm/llvm-project/pull/80229
changed implementation to align with how .debug_abbrev is handled. So
that
.debug_names abbrev tag is a monotonically increasing index. This allows
for
tools like LLDB to access it in constant time using array like data
structure.

clang-19 debug build
before change

[41] .debug_names PROGBITS 0000000000000000 8f9e0350 137fdbe0 00 0 0 4
after change
[41] .debug_names PROGBITS 0000000000000000 8f9e0350 125bfdec 00 0 0 4

Reduction ~19.1MB