[Bug c++/92299] New: The expression X / abs (X) is simplified to 1 even when the variable X is 0

[disquisitiones at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92299

            Bug ID: 92299
           Summary: The expression X / abs (X) is simplified to 1 even
                    when the variable X is 0
           Product: gcc
           Version: 9.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: disquisitiones at gmail dot com
  Target Milestone: ---

Created attachment 47141
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47141&action=edit
the preprocessed file that triggers the bug

This error seems present since GCC 7.1

Output of #g++ -v:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --with-system-zlib --with-isl --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch
--disable-libssp --enable-gnu-unique-object --enable-linker-build-id
--enable-lto --enable-plugin --enable-install-libiberty
--with-linker-hash-style=gnu --enable-gnu-indirect-function --enable-multilib
--disable-werror --enable-checking=release --enable-default-pie
--enable-default-ssp --enable-cet=auto
Thread model: posix
gcc version 9.2.0 (GCC)

- complete command line that triggers the bug:
#g++ -save-temps -o test test.cpp

- compiler output: none