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From: Aldy Hernandez <aldyh@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-3026] Avoid comparing ranges when sub-ranges is 0. Date: Mon, 3 Oct 2022 11:08:44 +0000 (GMT) [thread overview] Message-ID: <20221003110844.117953854170@sourceware.org> (raw) https://gcc.gnu.org/g:7f6f1f521fc12d4dbbdd0766d8fb7121d1e5ea8d commit r13-3026-g7f6f1f521fc12d4dbbdd0766d8fb7121d1e5ea8d Author: Aldy Hernandez <aldyh@redhat.com> Date: Sat Oct 1 22:31:34 2022 +0200 Avoid comparing ranges when sub-ranges is 0. There is nothing else to compare when the number of sub-ranges is 0. gcc/ChangeLog: * value-range.cc (irange::operator==): Early bail on m_num_ranges equal to 0. Diff: --- gcc/value-range.cc | 3 +++ 1 file changed, 3 insertions(+) diff --git a/gcc/value-range.cc b/gcc/value-range.cc index ddbcdd67633..e1066f4946e 100644 --- a/gcc/value-range.cc +++ b/gcc/value-range.cc @@ -1260,6 +1260,9 @@ irange::operator== (const irange &other) const if (m_num_ranges != other.m_num_ranges) return false; + if (m_num_ranges == 0) + return true; + for (unsigned i = 0; i < m_num_ranges; ++i) { tree lb = tree_lower_bound (i);
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