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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/17247] New: [3.5 Regression] TER is not always doing its job Date: Tue, 31 Aug 2004 06:32:00 -0000 [thread overview] Message-ID: <20040831063245.17247.pinskia@gcc.gnu.org> (raw) I finnally was able to analyzed why gcc.dg/rs6000-power2-2.c was failing and noticed that TER was not doing its job in combining back T.1 = *(a+-1*8); into t = T.1; why I don't know. Here is the reduced testcase: register double t1 __asm__("fr1"); void t(double *a, double *b) { t1 = a[-1]; b[-1] = t1; } Compile with "gcc -O3 -S -o - t.c -w" to see the problem. Can also see the problem with the following source on any target if you look into the *.var file: double t1; void t(double *a, double *b) { t1 = a[-1]; b[-1] = t1; } -- Summary: [3.5 Regression] TER is not always doing its job Product: gcc Version: 3.5.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: critical 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 GCC target triplet: powerpc-*-* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17247
next reply other threads:[~2004-08-31 6:32 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2004-08-31 6:32 pinskia at gcc dot gnu dot org [this message] 2004-08-31 6:35 ` [Bug tree-optimization/17247] " pinskia at gcc dot gnu dot org 2004-08-31 6:39 ` pinskia at gcc dot gnu dot org
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