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From: "schwab at suse dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/35695] New: [4.3/4.4 regression] -funroll-loops breaks inline float divide Date: Tue, 25 Mar 2008 17:29:00 -0000 [thread overview] Message-ID: <bug-35695-50@http.gcc.gnu.org/bugzilla/> (raw) $ gcc -O2 div.c $ ./a.out 1.000000000000000 0.5000000000000000 0.5000000000000000 0.3333333333333333 $ gcc -O2 -funroll-loops div.c $ ./a.out 1.000000000000000 0.4999980926513672 0.4999980926513672 0.3333330154418945 With -funroll-loops the insn that computes e = 1 - (b * y) is optimized in cse2 to e = 0. -- Summary: [4.3/4.4 regression] -funroll-loops breaks inline float divide Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: schwab at suse dot de GCC target triplet: ia64-*-* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35695
next reply other threads:[~2008-03-25 17:29 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-03-25 17:29 schwab at suse dot de [this message] 2008-03-25 17:30 ` [Bug target/35695] " schwab at suse dot de 2008-03-26 9:42 ` [Bug target/35695] [4.3/4.4 Regression] " rguenth at gcc dot gnu dot org 2008-03-27 5:53 ` wilson at tuliptree dot org 2008-03-27 5:55 ` wilson at gcc dot gnu dot org 2008-03-27 15:47 ` schwab at suse dot de 2008-03-27 17:18 ` schwab at suse dot de 2008-03-31 19:52 ` wilson at gcc dot gnu dot org 2008-03-31 20:23 ` wilson at gcc dot gnu dot org 2008-04-07 23:49 ` [Bug target/35695] [4.3 " wilson at gcc dot gnu dot org 2008-04-08 8:43 ` rguenther at suse dot de 2008-04-12 16:49 ` wilson at gcc dot gnu dot org 2008-04-14 23:48 ` wilson at gcc dot gnu dot org
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