[Bug c/69760] [4.9/5/6 Regression] Wrong 64-bit memory address caused by an unneeded overflowing 32-bit integer multiplication on x86_64 under -O2 and -O3 code optimization

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69760

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amker at gcc dot gnu.org
   Target Milestone|---                         |4.9.4
            Summary|Wrong 64-bit memory address |[4.9/5/6 Regression] Wrong
                   |caused by an unneeded       |64-bit memory address
                   |overflowing 32-bit integer  |caused by an unneeded
                   |multiplication on x86_64    |overflowing 32-bit integer
                   |under -O2 and -O3 code      |multiplication on x86_64
                   |optimization                |under -O2 and -O3 code
                   |                            |optimization

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems this stopped working at -O2 somewhere in between r127688 and r127750.