gcc: warn about integer overflow in constant expressions in the C++ frontend.
This fixes GCC 28986: http://gcc.gnu.org/ml/gcc-patches/2007-01/msg00473.html Obtained from: gcc 4.3 (rev. 120558; GPLv2) MFC after: 3 weeks
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=258157
@ -3773,6 +3773,12 @@ build_binary_op (enum tree_code code, tree orig_op0, tree orig_op1,
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result = fold_if_not_in_template (result);
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if (final_type != 0)
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result = cp_convert (final_type, result);
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if (TREE_OVERFLOW_P (result)
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&& !TREE_OVERFLOW_P (op0)
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&& !TREE_OVERFLOW_P (op1))
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overflow_warning (result);
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return result;
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}
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