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_decimal fails to build with --with-pydebug --with-lto on GCC #94847

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tiran opened this issue Jul 14, 2022 · 1 comment
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_decimal fails to build with --with-pydebug --with-lto on GCC #94847

tiran opened this issue Jul 14, 2022 · 1 comment
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type-bug An unexpected behavior, bug, or error

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@tiran
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tiran commented Jul 14, 2022

Bug report

GH-94474 caused several buildbots with GCC to fail to compile _decimal module with --with-pydebug --with-lto option. The problem did not show up when I was testing my PR on the build bot farm. I can reproduce the issue locally with GCC 12.1.1. Build does not fail with non-debug builds. Only the combination of LTO and debug fails for me

../Modules/_decimal/libmpdec/mpdecimal.c: In function ‘exp_to_string’:
../Modules/_decimal/libmpdec/mpdecimal.c:143:1: error: inlining failed in call to ‘always_inline’ ‘mpd_word_digits’: function not considered for inlining
  143 | mpd_word_digits(mpd_uint_t word)
      | ^
@tiran tiran added the type-bug An unexpected behavior, bug, or error label Jul 14, 2022
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tiran commented Jul 14, 2022

_decimal has been broken on LTO + pydebug builds for a while. We just didn't notice because build failure was not fatal and did not cause the buildbot to break. Here is an older build run from two days ago, https://buildbot.python.org/all/#/builders/285/builds/2550

tiran added a commit to tiran/cpython that referenced this issue Jul 14, 2022
@tiran
pythongh-94847: Don't force inlining in debug builds of libmpdec
20177b4
@bedevere-bot bedevere-bot mentioned this issue Jul 14, 2022
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tiran added a commit that referenced this issue Jul 18, 2022
@tiran
gh-94847: Don't force inlining in debug builds of libmpdec (GH-94848)
97b4121
miss-islington pushed a commit to miss-islington/cpython that referenced this issue Jul 18, 2022
@tiran @miss-islington
pythongh-94847: Don't force inlining in debug builds of libmpdec (pyt…
f8c9943 
…honGH-94848)

(cherry picked from commit 97b4121)

Co-authored-by: Christian Heimes <[email protected]>
@bedevere-bot bedevere-bot mentioned this issue Jul 18, 2022
Merged
@tiran tiran closed this as completed Jul 18, 2022
tiran added a commit that referenced this issue Jul 18, 2022
@miss-islington @tiran
[3.11] gh-94847: Don't force inlining in debug builds of libmpdec (GH…
4607e88 
…-94848) (GH-94951)

Co-authored-by: Christian Heimes <[email protected]>
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