From 4b8ca6c6177b2bd948c1cb2a116955b942751559 Mon Sep 17 00:00:00 2001 From: Andrew MacLeod Date: Mon, 27 Sep 2021 18:53:54 -0400 Subject: [PATCH] Ranger: More efficient zero/nonzero check. A recent change introduced a frequent check for zero and non-zero which has caused a lot of extra temporary trees to be created. Make the check more efficent as it is always a pointer and thus unsigned. * gimple-range-cache.cc (non_null_ref::adjust_range): Check for zero and non-zero more efficently. --- gcc/gimple-range-cache.cc | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc index 61043d3f375..91dd5a5c087 100644 --- a/gcc/gimple-range-cache.cc +++ b/gcc/gimple-range-cache.cc @@ -98,9 +98,10 @@ non_null_ref::adjust_range (irange &r, tree name, basic_block bb, return false; // We only care about the null / non-null property of pointers. - if (!POINTER_TYPE_P (TREE_TYPE (name)) || r.zero_p () || r.nonzero_p ()) + if (!POINTER_TYPE_P (TREE_TYPE (name))) + return false; + if (r.undefined_p () || r.lower_bound () != 0 || r.upper_bound () == 0) return false; - // Check if pointers have any non-null dereferences. if (non_null_deref_p (name, bb, search_dom)) {