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[Bug middle-end/49946] New: Thread jumps confuse loop unrolling
- From: "izamyatin at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 2 Aug 2011 14:41:13 +0000
- Subject: [Bug middle-end/49946] New: Thread jumps confuse loop unrolling
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
Summary: Thread jumps confuse loop unrolling
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: izamyatin@gmail.com
Created attachment 24892
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24892
test for loop unrolling
I see exactly the case that was mentioned here -
http://gcc.gnu.org/ml/gcc/2010-01/msg00057.html:
exp_gcc/gcc -c -O3 test_unroll.c -fno-tree-dominator-opts performs complete
unroll and
exp_gcc/gcc -c -O3 test_unroll.c does not do the unroll