[PATCH] D151908: [BOLT][DWARF] Output DWO files as they are being processed

[Alexander Yermolovich via Phabricator via llvm-commits]

ayermolo created this revision.
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Changed how we handle writing out .dwo and .dwp files. We now write out DWO
sections sooner and destroy DIEBuilder. This should decrease memory footprint.

Ran on clang-17 build in debug mode with split-dwarf.
before
8:07.49 real,   664.62 user,    69.00 sys,      0 amem, 41601612 mmem
8:07.06 real,   669.60 user,    68.75 sys,      0 amem, 41822588 mmem
8:00.36 real,   664.14 user,    66.36 sys,      0 amem, 41561548 mmem

after
8:21.85 real,   682.23 user,    69.64 sys,      0 amem, 39379880 mmem
8:04.58 real,   671.62 user,    66.50 sys,      0 amem, 39735800 mmem
8:10.02 real,   680.67 user,    67.24 sys,       0 amem, 39662888 mmem

Depends on D151906 <https://reviews.llvm.org/D151906>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151908

Files:
  bolt/include/bolt/Rewrite/DWARFRewriter.h
  bolt/lib/Rewrite/DWARFRewriter.cpp

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