Hi!
While looking at pattern recognizer, I've noticed that we needlessly
allocate a single member array from heap. An automatic variable for that
would be fine, but BB_VINFO_BB is also addressable.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2012-06-14 Jakub Jelinek <ja...@redhat.com>
* tree-vect-patterns.c (vect_pattern_recog): Don't unnecessarily
allocate and free bbs array for the SLP case.
--- gcc/tree-vect-patterns.c.jj 2012-06-14 13:22:27.000000000 +0200
+++ gcc/tree-vect-patterns.c 2012-06-14 15:33:16.335453016 +0200
@@ -2983,7 +2983,7 @@ void
vect_pattern_recog (loop_vec_info loop_vinfo, bb_vec_info bb_vinfo)
{
struct loop *loop;
- basic_block *bbs, bb;
+ basic_block *bbs;
unsigned int nbbs;
gimple_stmt_iterator si;
unsigned int i, j;
@@ -3002,10 +3002,8 @@ vect_pattern_recog (loop_vec_info loop_v
}
else
{
- bb = BB_VINFO_BB (bb_vinfo);
+ bbs = &BB_VINFO_BB (bb_vinfo);
nbbs = 1;
- bbs = XNEW (basic_block);
- bbs[0] = bb;
}
/* Scan through the loop stmts, applying the pattern recognition
@@ -3031,6 +3029,4 @@ vect_pattern_recog (loop_vec_info loop_v
}
VEC_free (gimple, heap, stmts_to_replace);
- if (bb_vinfo)
- free (bbs);
}
Jakub
