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r122435 - in /trunk/gcc: ChangeLog config/i386/...


Author: rakdver
Date: Thu Mar  1 22:14:23 2007
New Revision: 122435

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122435
Log:
	* tree-ssa-loop-prefetch.c (determine_unroll_factor):  Bound the unroll
	factor by the estimated number of iterations.
	(loop_prefetch_arrays): Do not prefetch in loops that iterate less than
	prefetch latency.

	* gcc.dg/tree-ssa/prefetch-4.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/prefetch-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/driver-i386.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-prefetch.c


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