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tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Check that loop is optimized for speed.

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* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Check that
	loop is optimized for speed.

From-SVN: r139834
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Jan Hubicka 2008-08-31 17:54:54 +02:00 • committed by Jan Hubicka
parent f885a45b90
commit 079990a2bf
2 changed files with 13 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-08-31 Jan Hubicka <jh@suse.cz>
* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Check that
loop is optimized for speed.
2008-08-31 Richard Guenther <rguenther@suse.de>
PR middle-end/37289

8
gcc/tree-ssa-loop-unswitch.c
View file

@ -198,6 +198,14 @@ tree_unswitch_single_loop (struct loop *loop, int num)
return false;
}
/* Do not unswitch in cold regions. */
if (optimize_loop_for_size_p (loop))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, ";; Not unswitching cold loops\n");
return false;
}
/* The loop should not be too large, to limit code growth. */
if (tree_num_loop_insns (loop, &eni_size_weights)
> (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))