[Bug rtl-optimization/25569] [4.2 Regression] FAIL: gfortran.dg/g77/20010610.f -O3 -fomit-frame-pointer -funroll-loops

[rakdver at gcc dot gnu dot org]

------- Comment #11 from rakdver at gcc dot gnu dot org  2006-03-14 01:10 -------
>From reading loop-unroll.c, I believe that we could safely have
>analyze_iv_to_split_insn return NULL instead of aborting when
>iv_analyze_result returns false.

>However, I wouldn't want to make such a change without first
>giving you the opportunity to look at the code and indicate
>if such a change is just papering over a problem elsewhere in
>the IV code.

This is definitely a bug in loop-iv.c -- once biv_p (SET_DEST (single_set
(insn))) returns true, iv_analyze_result must succeed as well.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25569