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[Bug tree-optimization/59597] [4.9 Regression] Performance degradation on Coremark after r205074
- 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: Wed, 22 Jan 2014 21:28:11 +0000
- Subject: [Bug tree-optimization/59597] [4.9 Regression] Performance degradation on Coremark after r205074
- Auto-submitted: auto-generated
- References: <bug-59597-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59597
--- Comment #5 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Jan 22 21:27:38 2014
New Revision: 206941
URL: http://gcc.gnu.org/viewcvs?rev=206941&root=gcc&view=rev
Log:
PR tree-optimization/59597
* tree-ssa-threadupdate.c (dump_jump_thread_path): Move to earlier
in file. Accept new argument REGISTERING and use it to modify
dump output appropriately.
(register_jump_thread): Corresponding changes.
(mark_threaded_blocks): Reinstate code to cancel unprofitable
thread paths involving joiner blocks. Add code to dump cancelled
jump threading paths.
PR tree-optimization/59597
* gcc.dg/tree-ssa/pr59597.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr59597.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-threadupdate.c