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libgcj41
pr34130.patch
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File pr34130.patch of Package libgcj41
2007-11-17 Richard Guenther <rguenther@suse.de> PR middle-end/34130 * fold-const.c (extract_muldiv_1): Do not move negative constants inside ABS_EXPR. * gcc.c-torture/execute/pr34130.c: New testcase. Index: gcc/fold-const.c =================================================================== --- gcc/fold-const.c.orig 2009-11-20 13:41:15.000000000 +0100 +++ gcc/fold-const.c 2009-11-20 13:41:37.000000000 +0100 @@ -5339,6 +5339,9 @@ extract_muldiv_1 (tree t, tree c, enum t } break; } + /* 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) Index: gcc/testsuite/gcc.c-torture/execute/pr34130.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.c-torture/execute/pr34130.c 2009-11-20 13:41:37.000000000 +0100 @@ -0,0 +1,12 @@ +extern void abort (void); +int foo (int i) +{ + return -2 * __builtin_abs(i - 2); +} +int main() +{ + if (foo(1) != -2 + || foo(3) != -2) + abort (); + return 0; +}
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