[Bug tree-optimization/109002] [13 Regression] -O1 -ftree-pre -ftree-partial-pre results in stall value

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109002

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|-O1 -ftree-pre              |[13 Regression] -O1
                   |-ftree-partial-pre results  |-ftree-pre
                   |in stall value              |-ftree-partial-pre results
                   |                            |in stall value
   Target Milestone|---                         |13.0
      Known to work|                            |12.2.0
           Priority|P3                          |P1
           Keywords|                            |needs-bisection

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like GCC 12 "works", I suspect the compile-time optimizations in pruning
to be the reason since PA_IN has bogus virtual operands in expressions which is
what the fix fixes.