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17 lines
620 B
Diff
17 lines
620 B
Diff
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Index: gcc-4.1.2/gcc/fold-const.c
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===================================================================
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--- gcc-4.1.2.orig/gcc/fold-const.c 2007-11-21 18:53:42.000000000 +0100
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+++ gcc-4.1.2/gcc/fold-const.c 2007-11-21 18:56:26.000000000 +0100
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@@ -5339,7 +5339,10 @@
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}
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break;
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}
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- /* FALLTHROUGH */
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+ /* If the constant is negative, we cannot simplify this. */
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+ if (tree_int_cst_sgn (c) == -1)
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+ break;
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+ /* FALLTHROUGH */
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case NEGATE_EXPR:
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if ((t1 = extract_muldiv (op0, c, code, wide_type)) != 0)
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return fold_build1 (tcode, ctype, fold_convert (ctype, t1));
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