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From: "changpeng dot fang at amd dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/45021] Redundant prefetches for some loops (vectorizer produced ones too) Date: Wed, 28 Jul 2010 18:28:00 -0000 [thread overview] Message-ID: <20100728182823.995.qmail@sourceware.org> (raw) In-Reply-To: <bug-45021-18740@http.gcc.gnu.org/bugzilla/> ------- Comment #5 from changpeng dot fang at amd dot com 2010-07-28 18:28 ------- Thing is a little complicate if we change the code to: a[i] = a[i+1] + beta * b[i]; The prefetch pass want to group a[i] and a[i+1], i.e. they have the same base address with an offset of 4 bytes. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45021
prev parent reply other threads:[~2010-07-28 18:28 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-07-21 17:46 [Bug tree-optimization/45021] New: Redundant prefetches for the vectorized loop changpeng dot fang at amd dot com 2010-07-21 18:27 ` [Bug tree-optimization/45021] " changpeng dot fang at amd dot com 2010-07-24 20:32 ` [Bug tree-optimization/45021] Redundant prefetches for some loops (vectorizer produced ones too) pinskia at gcc dot gnu dot org 2010-07-24 20:42 ` rakdver at kam dot mff dot cuni dot cz 2010-07-28 18:23 ` changpeng dot fang at amd dot com 2010-07-28 18:28 ` changpeng dot fang at amd dot com [this message]
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