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62 lines
2.0 KiB
62 lines
2.0 KiB
# --- 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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