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openSUSE:12.2
libgcj41
pr28755.patch
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File pr28755.patch of Package libgcj41
2006-08-17 Jakub Jelinek <jakub@redhat.com> PR middle-end/28755 * expr.c (expand_expr_real_1) <case ARRAY_REF>: Make sure the const array field optimization doesn't create an extra constant MEM. * gcc.dg/pr28755.c: New test. --- gcc/expr.c.jj 2006-08-09 17:54:03.000000000 +0200 +++ gcc/expr.c 2006-08-17 13:00:33.000000000 +0200 @@ -7105,13 +7105,25 @@ expand_expr_real_1 (tree exp, rtx target field, value) if (tree_int_cst_equal (field, index)) { - if (!TREE_SIDE_EFFECTS (value)) + if (TREE_SIDE_EFFECTS (value)) + break; + + if (TREE_CODE (value) != CONSTRUCTOR) return expand_expr (fold (value), target, tmode, modifier); + + /* For CONSTRUCTOR this optimization is not always + a win - if expand_expr creates a temporary + constant, we just waste unnecessarily rodata + space. */ + temp = expand_expr (value, target, tmode, modifier); + if (temp == target + || (temp && GET_CODE (temp) != MEM)) + return temp; break; } } - else if(TREE_CODE (init) == STRING_CST) + else if (TREE_CODE (init) == STRING_CST) { tree index1 = index; tree low_bound = array_ref_low_bound (exp); --- gcc/testsuite/gcc.dg/pr28755.c.jj 2006-08-17 12:59:57.000000000 +0200 +++ gcc/testsuite/gcc.dg/pr28755.c 2006-08-17 12:59:57.000000000 +0200 @@ -0,0 +1,22 @@ +/* PR middle-end/28755 */ +/* { dg-do compile } */ +/* { dg-options "-Os" } */ +/* { dg-final { scan-assembler-times "2112543726\|7deadbee" 2 } } */ + +struct S +{ + void *s1; + unsigned s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14; +}; + +const struct S array[] = { + { (void *) 0, 60, 640, 2112543726, 39682, 48, 16, 33, 10, 96, 2, 0, 0, 4 }, + { (void *) 0, 60, 2112543726, 192, 18251, 16, 33, 10, 96, 2, 0, 0, 4, 212 } +}; + +void +foo (struct S *x) +{ + x[0] = array[0]; + x[5] = array[1]; +}
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