Re: [PATCH] Bail in bounds_of_var_in_loop if scev returns NULL.

[Andrew MacLeod via Gcc-patches]

On 5/13/21 4:15 PM, Aldy Hernandez via Gcc-patches wrote:

Both initial_condition_in_loop_num and evolution_part_in_loop_num
can return NULL.  This patch exits if either one is NULL.  Presumably
this didn't happen before, because adjust_range_with_scev was called
far less frequently than in ranger, which can call it for every PHI.

OK pending tests?

gcc/ChangeLog:

        PR tree-optimization/100349
        * vr-values.c (bounds_of_var_in_loop): Bail if scev returns
          NULL.

gcc/testsuite/ChangeLog:

        * gcc.dg/pr100349.c: New test.
-

OK.

Andrew