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0ef93c86f7
torture/bitint-39.c ICEs with -O1; the problem is that the
finish_arith_overflow code in one spot replaces use_stmt with an
assignment or cast, but if unlucky and m_gsi iterator is the same statement,
when the code later
tree clobber = build_clobber (TREE_TYPE (var), CLOBBER_EOL);
g = gimple_build_assign (var, clobber);
gsi_insert_after (&m_gsi, g, GSI_SAME_STMT);
it will insert after iterator which contains already replaced statement and
that causes the gimple chain corruption.
2023-12-01 Jakub Jelinek <jakub@redhat.com>
* gimple-lower-bitint.cc (bitint_large_huge::finish_arith_overflow):
When replacing use_stmt which is gsi_stmt (m_gsi), update m_gsi to
the new statement.
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