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loop-iv.c (iv_analysis_loop_init): Use df analysis in a more efficient way.

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* loop-iv.c (iv_analysis_loop_init): Use df analysis in a more
	efficient way.

From-SVN: r110188
This commit is contained in:
Zdenek Dvorak 2006-01-25 00:37:25 +01:00 • committed by Zdenek Dvorak
parent 801a91f9c2
commit 7faaba2884
2 changed files with 13 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2006-01-25 Zdenek Dvorak <dvorakz@suse.cz>
* loop-iv.c (iv_analysis_loop_init): Use df analysis in a more
efficient way.
2006-01-24 DJ Delorie <dj@redhat.com>
* expmed.c (store_bit_field): Don't arbitrarily deny using insv

13
gcc/loop-iv.c
View file

@ -250,11 +250,14 @@ iv_analysis_loop_init (struct loop *loop)
current_loop = loop;
/* Clear the information from the analysis of the previous loop. */
if (!first_time)
iv_analysis_done ();
df = df_init (DF_HARD_REGS | DF_EQUIV_NOTES);
df_chain_add_problem (df, DF_UD_CHAIN);
bivs = htab_create (10, biv_hash, biv_eq, free);
if (first_time)
{
df = df_init (DF_HARD_REGS | DF_EQUIV_NOTES);
df_chain_add_problem (df, DF_UD_CHAIN);
bivs = htab_create (10, biv_hash, biv_eq, free);
}
else
clear_iv_info ();
for (i = 0; i < loop->num_nodes; i++)
{