[Bug rtl-optimization/52203] ICE: in reset_sched_cycles_in_current_ebb, at sel-sched.c:7136 with -fsel-sched-pipelining -fselective-scheduling2 and other custom flags

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52203

--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2012-02-13 15:54:28 UTC ---
(In reply to comment #2)
> Well, in this case the insn is vcvtps2pd (from avx_cvtps2pd256 and
> *avx_cvtps2pd256_2 patterns) but not having a reservation looks correct as the
> manual says "decode type -- microcode".  Uros, is that right?  In this case,
> the below fixes the test for me (and I was stupid enough not to do this in the
> first place when this bug stream just started...  However, we did fix some real
> bugs.)

There is nothing wrong with insn definition, the problem is only that
attributes are missing.  Attributes are considered a tool to fine-tune the
scheduler and in any case, gcc should not ICE on an insn without reservation.
The insn doesn't reserve anything in this case and scheduler should live with
this.

The bugs you are referring to were real bugs, where wrong or missing operand
was accessed from attribute calculation machinery.