[Bug tree-optimization/127687] [15/16/17 Regression] -fcompare-debug failure when GIMPLE_DEBUG splits forwprop VEC_PERM sequence blending since r15-5563

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127687

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|-fcompare-debug failure     |[15/16/17 Regression]
                   |when GIMPLE_DEBUG splits    |-fcompare-debug failure
                   |forwprop VEC_PERM sequence  |when GIMPLE_DEBUG splits
                   |blending                    |forwprop VEC_PERM sequence
                   |                            |blending since r15-5563
   Target Milestone|---                         |15.4
           Priority|P3                          |P2
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r15-5563-g1c4d39ada33d3655db088a0e5c90a296da794a55

I wonder if debug stmts shouldn't be skipped earlier, before assigning uids,
nothing should check uids of debug stmts in the pass and by only assigning uids
to non-debug they will be consistent.