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[Bug tree-optimization/61384] [4.10 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
- From: "dehao at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 02 Jun 2014 14:50:41 +0000
- Subject: [Bug tree-optimization/61384] [4.10 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
- Auto-submitted: auto-generated
- References: <bug-61384-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61384
dehao at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #3 from dehao at gcc dot gnu.org ---
We need to rebuild frequency after vrp, otherwise the following code in
tree-ssa-threadupdate.c will make the frequency larger than upper-bound.
/* Excessive jump threading may make frequencies large enough so
the computation overflows. */
if (rd->dup_blocks[0]->frequency < BB_FREQ_MAX * 2)
rd->dup_blocks[0]->frequency += EDGE_FREQUENCY (e);
I'll send out a patch for this.