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From: "abnikant dot singh at atmel dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/18065] usual arithmetic conversion not applying correctly Date: Tue, 14 Sep 2010 07:06:00 -0000 [thread overview] Message-ID: <20100914070615.27664.qmail@sourceware.org> (raw) In-Reply-To: <bug-18065-9497@http.gcc.gnu.org/bugzilla/> ------- Comment #34 from abnikant dot singh at atmel dot com 2010-09-14 07:06 ------- Yeah, this is happening because of the type promotion in gcc/c-common.c in the function c_promoting_integer_type_p. See this: /* Nonzero if the type T promotes to int. This is (nearly) the integral promotions defined in ISO C99 6.3.1.1/2. */ bool c_promoting_integer_type_p (const_tree t) { switch (TREE_CODE (t)) { case INTEGER_TYPE: return (TYPE_MAIN_VARIANT (t) == char_type_node || TYPE_MAIN_VARIANT (t) == signed_char_type_node || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node || TYPE_MAIN_VARIANT (t) == short_integer_type_node || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); case ENUMERAL_TYPE: /* ??? Technically all enumerations not larger than an int promote to an int. But this is used along code paths that only want to notice a size change. */ return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); case BOOLEAN_TYPE: return 1; default: return 0; } } So by commenting the case INTEGER_TYPE, we will get the call to _divmodqi4, but I don't think this is the right thing to do. -- abnikant dot singh at atmel dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |abnikant dot singh at atmel | |dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18065
next parent reply other threads:[~2010-09-14 7:06 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-18065-9497@http.gcc.gnu.org/bugzilla/> 2010-09-14 7:06 ` abnikant dot singh at atmel dot com [this message] 2010-09-14 7:13 ` abnikant dot singh at atmel dot com [not found] <bug-18065-4@http.gcc.gnu.org/bugzilla/> 2012-05-24 14:03 ` peter777778 at hotmail dot co.uk 2012-05-24 14:04 ` peter777778 at hotmail dot co.uk 2012-05-24 14:05 ` peter777778 at hotmail dot co.uk 2012-05-24 14:23 ` peter777778 at hotmail dot co.uk 2004-10-19 20:22 [Bug c/18065] New: wrong built-in functions selected schlie at comcast dot net 2004-10-20 22:31 ` [Bug tree-optimization/18065] usual arithmetic conversion not applying correctly pinskia at gcc dot gnu dot org 2004-10-20 22:42 ` jsm at polyomino dot org dot uk 2004-10-20 23:03 ` jsm at polyomino dot org dot uk 2004-10-20 23:28 ` schlie at comcast dot net 2004-10-21 1:04 ` schlie at comcast dot net 2004-10-21 1:28 ` schlie at comcast dot net 2004-10-21 12:47 ` bangerth at dealii dot org 2004-12-21 20:50 ` schlie at comcast dot net 2005-01-16 1:39 ` pinskia at gcc dot gnu dot org 2005-01-16 7:17 ` schlie at comcast dot net 2005-01-16 17:39 ` schlie at comcast dot net
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