[Bug c++/38562] [4.3/4.4 regression] mysql miscompiles and causes testsuite failures

--- Comment #11 from pinskia at gcc dot gnu dot org 2008-12-22 01:10 --- I do get a warning from the trunk though: log_event.cc: In member function 'virtual bool Query_log_event::write(IO_CACHE*)': log_event.cc:1124: warning: dereferencing pointer 'start.519' does break strict-aliasing

[Bug c++/38562] [4.3/4.4 regression] mysql miscompiles and causes testsuite failures

--- Comment #10 from pinskia at gcc dot gnu dot org 2008-12-22 01:06 --- (In reply to comment #9) > Is this a regression in gcc, or is this something upstreams need to add to > their builds when doing the char/pointer manipulations you described? Most likely a bug in the mysql sources.

[Bug c++/38562] [4.3/4.4 regression] mysql miscompiles and causes testsuite failures

--- Comment #9 from kees at outflux dot net 2008-12-22 01:01 --- Yes! Adding "-fno-strict-aliasing" to a normal (-O2) build seems to have fixed the problems so far. The full test suite takes a while, but the early failures are not present any more. I will report more once it finishes.

Results for 4.3.3 20081217 (prerelease) (Debian 4.3.2-3~exp5) libjava testsuite on arm-unknown-linux-gnueabi

LAST_UPDATED: Wed Dec 17 07:13:08 UTC 2008 (revision 142790) Native configuration is arm-unknown-linux-gnueabi === libjava tests === Running target unix FAIL: Throw_2 execution - source compiled test FAIL: Throw_2 -findirect-dispatch execution - source compiled test FAIL: Throw_

Results for 4.3.3 20081217 (prerelease) (Debian 4.3.2-3~exp5) libjava testsuite on powerpc-unknown-linux-gnu

LAST_UPDATED: Wed Dec 17 07:13:08 UTC 2008 (revision 142790) Target: powerpc-linux-gnu gcc version 4.3.3 20081217 (prerelease) (Debian 4.3.2-3~exp5) Native configuration is powerpc-unknown-linux-gnu === libjava tests === Running target unix === libjava Summary

[Bug c++/38562] [4.3/4.4 regression] mysql miscompiles and causes testsuite failures

--- Comment #8 from pinskia at gcc dot gnu dot org 2008-12-21 22:48 --- Does compiling with -O2 -fno-strict-aliasing fix the issue. I thought I saw some aliasing violations in the source dealing with accessing a "char *" as a "Log_event::Byte*" (aka "unsigned char *"). Now what is only

[Bug c++/38562] [4.3/4.4 regression] mysql miscompiles and causes testsuite failures

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[Bug tree-optimization/38593] [4.4 regression] ICE: verify_gimple failed

--- Comment #4 from pinskia at gcc dot gnu dot org 2008-12-21 17:27 --- Does disabling PCH fix the issue (just adding -D__disable_PCH__ should be enough to disable PCH when building that one file)? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38593 --- You are receiving this

[Bug tree-optimization/38593] [4.4 regression] ICE: verify_gimple failed

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[Bug target/38593] [4.4 regression] ICE: verify_gimple failed

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