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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/19905] New: Extra V_MAY_DEF on a static variable whose address is not taken (we should be able to move the load out of the loop) Date: Fri, 11 Feb 2005 19:29:00 -0000 [thread overview] Message-ID: <20050211144714.19905.pinskia@gcc.gnu.org> (raw) The following two functions should be the same (note don't compile with -ffast-math or even -fno- math-errno as sqrt is marked as pure) #define NUMPOINTS 20 float opoints[NUMPOINTS]; double sqrt (double); void NormalizeVectors (void) { int i, r; float s, x, y, z; static float d = 0.0; d += 0.2f; if (d > 4) d = 0.0; for (i=0; i<NUMPOINTS; i++) { opoints[i] = sqrt (d); } } void NormalizeVectors1 (void) { int i, r; float s, x, y, z; static float d = 0.0; d += 0.2f; if (d > 4) d = 0.0; s = d; for (i=0; i<NUMPOINTS; i++) { opoints[i] = sqrt (s); } } -- Summary: Extra V_MAY_DEF on a static variable whose address is not taken (we should be able to move the load out of the loop) Product: gcc Version: 4.0.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19905
next reply other threads:[~2005-02-11 14:47 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-02-11 19:29 pinskia at gcc dot gnu dot org [this message] 2005-02-11 19:38 ` [Bug tree-optimization/19905] " pinskia at gcc dot gnu dot org 2005-02-20 19:30 ` pinskia at gcc dot gnu dot org 2005-05-08 17:40 ` pinskia at gcc dot gnu dot org 2005-07-17 20:35 ` pinskia at gcc dot gnu dot org 2005-07-17 20:55 ` pinskia at gcc dot gnu dot org 2005-07-19 20:00 ` pinskia at gcc dot gnu dot org 2005-08-23 16:52 ` pinskia at gcc dot gnu dot org
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