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63 lines
2.0 KiB
63 lines
2.0 KiB
17 years ago
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# --- SDE-COPYRIGHT-NOTE-BEGIN ---
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# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
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#
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# Filename: package/.../gcc/extract_muldiv.patch
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# Copyright (C) 2007 The OpenSDE Project
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#
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# More information can be found in the files COPYING and README.
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#
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# This patch file is dual-licensed. It is available under the license the
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# patched project is licensed under, as long as it is an OpenSource license
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# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
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# of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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# --- SDE-COPYRIGHT-NOTE-END ---
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Take from http://gcc.gnu.org/ml/gcc-patches/2007-11/msg00948.html
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2007-11-17 Richard Guenther <rguenther@suse.de>
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PR middle-end/34130
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* fold-const.c (extract_muldiv_1): Do not move negative
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constants inside ABS_EXPR.
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* gcc.c-torture/execute/pr34130.c: New testcase.
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Index: ./gcc/fold-const.c
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===================================================================
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*** ./gcc/fold-const.c (revision 130238)
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--- ./gcc/fold-const.c (working copy)
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*************** extract_muldiv_1 (tree t, tree c, enum t
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*** 6095,6100 ****
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--- 6095,6103 ----
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}
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break;
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}
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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, strict_overflow_p))
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Index: ./gcc/testsuite/gcc.c-torture/execute/pr34130.c
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===================================================================
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*** ./gcc/testsuite/gcc.c-torture/execute/pr34130.c (revision 0)
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--- ./gcc/testsuite/gcc.c-torture/execute/pr34130.c (revision 0)
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***************
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*** 0 ****
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--- 1,12 ----
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+ extern void abort (void);
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+ int foo (int i)
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+ {
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+ return -2 * __builtin_abs(i - 2);
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+ }
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+ int main()
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+ {
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+ if (foo(1) != -2
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+ || foo(3) != -2)
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+ abort ();
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+ return 0;
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+ }
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