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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/56902] New: Fails to SLP with mismatched +/- and negatable constants Date: Wed, 10 Apr 2013 09:46:00 -0000 [thread overview] Message-ID: <bug-56902-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56902 Bug #: 56902 Summary: Fails to SLP with mismatched +/- and negatable constants Classification: Unclassified Product: gcc Version: 4.9.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P3 Component: tree-optimization AssignedTo: unassigned@gcc.gnu.org ReportedBy: rguenth@gcc.gnu.org Blocks: 53947 double x[1024], y[1024], z[1024]; void foo (double w) { int i; for (i = 0; i < 1023; i+=2) { z[i] = x[i] + 3.; z[i+1] = x[i+1] + -3.; } } void bar (double w) { int i; for (i = 0; i < 1023; i+=2) { z[i] = x[i] + w; z[i+1] = x[i+1] + -3.; } } void baz (double w) { int i; for (i = 0; i < 1023; i+=2) { z[i] = x[i] - w; z[i+1] = x[i+1] + 3.; } }
next reply other threads:[~2013-04-10 9:46 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-04-10 9:46 rguenth at gcc dot gnu.org [this message] 2013-11-11 18:44 ` [Bug tree-optimization/56902] " congh at google dot com 2013-11-13 15:39 ` rguenth at gcc dot gnu.org 2015-10-22 10:03 ` rguenth at gcc dot gnu.org
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