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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/105533] UBSAN: gcc/expmed.cc:3272:26: runtime error:
 signed integer overflow: -9223372036854775808 - 1 cannot be represented in
 type 'long int'
Date: Tue, 05 Mar 2024 19:20:46 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105533

David Binderman <dcb314 at hotmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dcb314 at hotmail dot com

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
I see something similar when attempting a bootstrap with asan & ubsan on
current gcc trunk:

gcc/expmed.cc:3288:26: runtime error: signed integer overflow:
-9223372036854775808 - 1 cannot be represented in type 'long int'

Configure is:

../trunk/configure \
    --disable-multilib \
    --disable-werror \
    --with-build-config=3Dbootstrap-asan \
    --with-build-config=3Dbootstrap-ubsan \
    --enable-checking=3Ddf,extra,fold,rtl,yes \
    --enable-languages=3Dc,c++,fortran

And there are extra flags added to the top level Makefile:

sed 's;-O2;-O3 -march=3Dnative;' < Makefile > Makefile.tmp
diff Makefile Makefile.tmp
mv Makefile.tmp Makefile

I wonder if this is a regression for gcc-14.=