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Date: Sat, 26 Feb 2005 22:27:00 -0000
From: "christophe dot jaillet at wanadoo dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20050225234916.20219.christophe.jaillet@wanadoo.fr>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug rtl-optimization/20219] New: Missed optimisation sin / tan --> cos
X-Bugzilla-Reason: CC
X-SW-Source: 2005-02/txt/msg03215.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

GCC knows how to optimise
	tan * cos --> sin		(fold-const line 7734)
	cos * tan --> sin
	sin / cos --> tan		(fold-const line 8080)
	cos / sin --> 1.0 / tan		(fold-const line 8094)
	
but misses
	sin / tan --> cos
	tan / sin --> 1.0 / cos

-- 
           Summary: Missed optimisation sin / tan --> cos
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: christophe dot jaillet at wanadoo dot fr
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20219