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[Bug rtl-optimization/68182] [6 Regression] ICE in reorder_basic_blocks_simple building libitm/beginend.cc
- From: "segher at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 09 Nov 2015 03:57:51 +0000
- Subject: [Bug rtl-optimization/68182] [6 Regression] ICE in reorder_basic_blocks_simple building libitm/beginend.cc
- Auto-submitted: auto-generated
- References: <bug-68182-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68182
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Nov 9 03:57:19 2015
New Revision: 229983
URL: https://gcc.gnu.org/viewcvs?rev=229983&root=gcc&view=rev
Log:
Fix bb-reorder problem with degenerate cond_jump (PR68182)
The code mistakenly thinks any cond_jump has two successors. This is
not true if both destinations are the same, as can happen with weird
patterns as in the PR.
PR rtl-optimization/68182
* gcc/bb-reorder.c (reorder_basic_blocks_simple): Treat a conditional
branch with only one successor just like unconditional branches.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/bb-reorder.c