From: Richard Sandiford <richard.sandiford@arm.com>
To: gcc-patches@gcc.gnu.org
Cc: Richard Sandiford <richard.sandiford@arm.com>
Subject: [PATCH 1/4] rtl-ssa: Fix null deref in first_any_insn_use
Date: Tue, 24 Oct 2023 11:29:57 +0100 [thread overview]
Message-ID: <20231024103000.3334790-2-richard.sandiford@arm.com> (raw)
In-Reply-To: <20231024103000.3334790-1-richard.sandiford@arm.com>
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 c127fab8b98..3fdca14e0ef 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;
}
--
2.25.1
next prev parent reply other threads:[~2023-10-24 10:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-24 10:29 [PATCH 0/4] rtl-ssa: Some small, obvious fixes Richard Sandiford
2023-10-24 10:29 ` Richard Sandiford [this message]
2023-10-24 10:29 ` [PATCH 2/4] rtl-ssa: Fix handling of deleted insns Richard Sandiford
2023-10-24 10:29 ` [PATCH 3/4] rtl-ssa: Don't insert after insns that can throw Richard Sandiford
2023-10-24 10:30 ` [PATCH 4/4] rtl-ssa: Avoid creating duplicated phis Richard Sandiford
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