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* [Bug debug/100304] New: [11/12 Regression] -fcompare-debug failure (length) with custom flags
@ 2021-04-28  5:21 zsojka at seznam dot cz
  2021-04-28  6:26 ` [Bug debug/100304] " rguenth at gcc dot gnu.org
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: zsojka at seznam dot cz @ 2021-04-28  5:21 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100304

            Bug ID: 100304
           Summary: [11/12 Regression] -fcompare-debug failure (length)
                    with custom flags
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
                CC: aoliva at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

Created attachment 50694
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50694&action=edit
auto-reduced testcase (from OpenTTD sources)

The same set of compiler flags after reduction was observed twice on two
different testcases, so it might be important.

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -fno-cse-follow-jumps
-fno-guess-branch-probability -fno-tree-coalesce-vars -fno-tree-forwprop
-funroll-loops -fno-web -fcompare-debug testcase.C -w
x86_64-pc-linux-gnu-gcc: error: testcase.C: '-fcompare-debug' failure (length)


$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-174-20210427141825-g37d2b98100c-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r12-174-20210427141825-g37d2b98100c-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.0 20210427 (experimental) (GCC)

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2021-09-20  6:54 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-28  5:21 [Bug debug/100304] New: [11/12 Regression] -fcompare-debug failure (length) with custom flags zsojka at seznam dot cz
2021-04-28  6:26 ` [Bug debug/100304] " rguenth at gcc dot gnu.org
2021-04-28  9:56 ` jakub at gcc dot gnu.org
2021-04-28 11:09 ` zsojka at seznam dot cz
2021-04-29 18:19 ` zsojka at seznam dot cz
2021-05-07 11:22 ` zsojka at seznam dot cz
2021-07-28  7:06 ` rguenth at gcc dot gnu.org
2021-09-20  6:54 ` pinskia at gcc dot gnu.org

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