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authorRichard Biener <rguenther@suse.de>2024-04-17 13:20:40 +0200
committerRichard Biener <rguenther@suse.de>2024-05-07 15:28:55 +0200
commitcb4e2685a3e73474246adda356595f72fcd43827 (patch)
tree751b77369b1ea8e094dd4d10de252d5dbaf897ae
parentb72e7addf855aed66c0922f17efc85f26193f801 (diff)
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Avoid re-allocating vector
The following avoids re-allocating the var map BB vector by pre-allocating it to the exact size needed when operating on the whole function. * tree-ssa-live.cc (init_var_map): Pre-allocate vec_bbs vector to the correct size and use quick_push.
-rw-r--r--gcc/tree-ssa-live.cc4
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-live.cc b/gcc/tree-ssa-live.cc
index fa6be2f..e6ae551 100644
--- a/gcc/tree-ssa-live.cc
+++ b/gcc/tree-ssa-live.cc
@@ -113,8 +113,10 @@ init_var_map (int size, class loop *loop, bitmap bitint)
map->outofssa_p = bitint == NULL;
map->bitint = bitint;
basic_block bb;
+ map->vec_bbs.reserve_exact (n_basic_blocks_for_fn (cfun)
+ - NUM_FIXED_BLOCKS);
FOR_EACH_BB_FN (bb, cfun)
- map->vec_bbs.safe_push (bb);
+ map->vec_bbs.quick_push (bb);
}
return map;
}