From 50313dcdf3324db6d6e522fcaa6ff94dd5de6d3f Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Tue, 24 Oct 2023 11:30:52 +0100 Subject: [PATCH] rtl-ssa: Fix null deref in first_any_insn_use first_any_insn_use implicitly (but contrary to its documentation) assumed that there was at least one use. gcc/ * rtl-ssa/member-fns.inl (first_any_insn_use): Handle null m_first_use. --- gcc/rtl-ssa/member-fns.inl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gcc/rtl-ssa/member-fns.inl b/gcc/rtl-ssa/member-fns.inl index c127fab8b981..3fdca14e0ef5 100644 --- a/gcc/rtl-ssa/member-fns.inl +++ b/gcc/rtl-ssa/member-fns.inl @@ -215,7 +215,7 @@ set_info::last_nondebug_insn_use () const inline use_info * set_info::first_any_insn_use () const { - if (m_first_use->is_in_any_insn ()) + if (m_first_use && m_first_use->is_in_any_insn ()) return m_first_use; return nullptr; } -- 2.47.2