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comparison gcc/testsuite/gcc.dg/strlenopt-57.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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children 1830386684a0
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111:04ced10e8804 131:84e7813d76e9
1 /* PR tree-optimization/86914 - wrong code with strlen() of poor-man's
2 flexible array member plus offset
3 { dg-do compile }
4 { dg-options "-O2 -Wall -fdump-tree-optimized" } */
5
6 #include "strlenopt.h"
7
8 struct A0 { char i, a[0]; };
9 struct A1 { char i, a[1]; };
10 struct A9 { char i, a[9]; };
11 struct Ax { char i, a[]; };
12
13 extern int a[];
14
15 extern struct A0 a0;
16 extern struct A1 a1;
17 extern struct A9 a9;
18 extern struct Ax ax;
19
20 void test_var_flexarray_cst_off (void)
21 {
22 /* Use arbitrary constants greater than 16 in case GCC ever starts
23 unrolling strlen() calls with small array arguments. */
24 a[0] = 17 < strlen (a0.a + 1);
25 a[1] = 19 < strlen (a1.a + 1);
26 a[2] = 23 < strlen (a9.a + 9);
27 a[3] = 29 < strlen (ax.a + 3);
28 }
29
30 void test_ptr_flexarray_cst_off (struct A0 *p0, struct A1 *p1,
31 struct A9 *p9, struct Ax *px)
32 {
33 a[0] = 17 < strlen (p0->a + 1);
34 a[1] = 19 < strlen (p1->a + 1);
35 a[2] = 23 < strlen (p9->a + 9);
36 a[3] = 29 < strlen (px->a + 3);
37 }
38
39 void test_ptr_flexarray_var_off (struct A0 *p0, struct A1 *p1,
40 struct A9 *p9, struct Ax *px,
41 int i)
42 {
43 a[0] = 17 < strlen (p0->a + i);
44 a[1] = 19 < strlen (p1->a + i);
45 a[2] = 23 < strlen (p9->a + i);
46 a[3] = 29 < strlen (px->a + i);
47 }
48
49 /* { dg-final { scan-tree-dump-times "strlen" 12 "optimized" } } */