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Ranger: More efficient zero/nonzero check.

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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.
This commit is contained in:
Andrew MacLeod 2021-09-27 18:53:54 -04:00
parent 90c3a62272
commit 4b8ca6c617
1 changed files with 3 additions and 2 deletions
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5
gcc/gimple-range-cache.cc
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@ -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))
{