This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug libstdc++/85116] std::min_element does not optimize well with inlined predicate
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 26 Apr 2018 12:19:30 +0000
- Subject: [Bug libstdc++/85116] std::min_element does not optimize well with inlined predicate
- Auto-submitted: auto-generated
- References: <bug-85116-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85116
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 26 12:18:58 2018
New Revision: 259672
URL: https://gcc.gnu.org/viewcvs?rev=259672&root=gcc&view=rev
Log:
2018-04-26 Richard Biener <rguenther@suse.de>
PR tree-optimization/85116
* tree-ssa-loop-ch.c (do_while_loop_p): A do-while loop should
have a loop exit from the single latch predecessor. Remove
case of header with just condition.
(ch_base::copy_headers): Exclude infinite loops from any
processing.
(pass_ch::execute): Record exits.
* gcc.dg/tree-ssa/copy-headers-2.c: New testcase.
* gcc.dg/tree-ssa/copy-headers-3.c: Likewise.
* gcc.dg/tree-ssa/copy-headers-4.c: Likewise.
* gcc.dg/tree-ssa/loadpre6.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/copy-headers-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/copy-headers-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/copy-headers-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/loadpre6.c
trunk/gcc/tree-ssa-loop-ch.c