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--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -5339,7 +5339,10 @@ extract_muldiv_1 (tree t, tree c, enum t
}
break;
}
- /* FALLTHROUGH */
+ /* If the constant is negative, we cannot simplify this. */
+ if (tree_int_cst_sgn (c) == -1)
+ break;
+ /* FALLTHROUGH */
case NEGATE_EXPR:
if ((t1 = extract_muldiv (op0, c, code, wide_type)) != 0)
return fold_build1 (tcode, ctype, fold_convert (ctype, t1));
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