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[Bug lto/66752] spec2000 255.vortex performance compiled with GCC is ~20% lower than with CLANG
- From: "law at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 25 Jul 2015 05:46:14 +0000
- Subject: [Bug lto/66752] spec2000 255.vortex performance compiled with GCC is ~20% lower than with CLANG
- Auto-submitted: auto-generated
- References: <bug-66752-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66752
--- Comment #12 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Sat Jul 25 05:45:42 2015
New Revision: 226206
URL: https://gcc.gnu.org/viewcvs?rev=226206&root=gcc&view=rev
Log:
Revert:
PR lto/66752
* tree-ssa-threadedge.c (simplify_conrol_stmt_condition): If we are
unable to find X NE 0 in the tables, return X as the simplified
condition.
(fsm_find_control_statement_thread_paths): If nodes in NEXT_PATH are
in VISISTED_BBS, then return failure. Else add nodes from NEXT_PATH
to VISISTED_BBS. */
* tree-ssa-threadupdate.c (duplicate_thread_path): Fix up edge flags
after removing the control flow statement and unnecessary edges.
testsuite/
PR lto/66752
* gcc.dg/tree-ssa/pr66752-2.c: New test.
* gcc.dg/torture/pr66752-1.c: New test
* g++.dg/torture/pr66752-2.C: New test.
Removed:
trunk/gcc/testsuite/g++.dg/torture/pr66752-2.C
trunk/gcc/testsuite/gcc.dg/torture/pr66752-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr66752-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-threadedge.c
trunk/gcc/tree-ssa-threadupdate.c