scev: Avoid ICE on results used in abnormal PHI args [PR113201]

The following testcase ICEs when rslt is SSA_NAME_OCCURS_IN_ABNORMAL_PHI
and we call replace_uses_by with a INTEGER_CST def, where it ICEs on:
              if (e->flags & EDGE_ABNORMAL
                  && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (val))
because val is not an SSA_NAME.  One way would be to add
                  && TREE_CODE (val) == SSA_NAME
check in between the above 2 lines in replace_uses_by.

And/or the following patch just punts propagating constants to
SSA_NAME_OCCURS_IN_ABNORMAL_PHI rslt uses.

Or we could punt somewhere earlier in final value replacement (but dunno
where).

2024-01-05  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/113201
	* tree-scalar-evolution.cc (final_value_replacement_loop): Don't call
	replace_uses_by on SSA_NAME_OCCURS_IN_ABNORMAL_PHI rslt.

	* gcc.c-torture/compile/pr113201.c: New test.

0 files changed, 0 insertions, 0 deletions