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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/67864] New: [6 Regression] CSiBE size regression
Date: Tue, 06 Oct 2015 10:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67864

            Bug ID: 67864
           Summary: [6 Regression] CSiBE size regression
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
                CC: segher at kernel dot crashing.org
  Target Milestone: ---

http://gcc.opensuse.org/CSiBE/ shows a big size regression between r228310
(good)
and r228359 (bad).  Flags used are -Os -fgnu89-inline, suspect is


+2015-10-01  Segher Boessenkool  <segher@kernel.crashing.org>
+
+       * bb-reorder.c (reorder_basic_blocks): Use the algorithm selected
+       with flag_reorder_blocks_algorithm.
+       * common.opt (freorder-blocks-algorithm=): New flag.
+       (reorder_blocks_algorithm): New enum.
+       * flag-types.h (reorder_blocks_algorithm): New enum.
+       * opts.c (default_options_table): Use -freorder-blocks at -O1 and up,
+       and -freorder-blocks-algorithm=stc at -O2 and up (not at -Os).

The size regression is from 3562398 bytes to 3617915 bytes.