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comparison gcc/testsuite/gcc.dg/Walloca-3.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* { dg-do compile } */
2 /* { dg-require-effective-target alloca } */
3 /* { dg-options "-Walloca-larger-than=2000 -O2" } */
4
5 void f (void *);
6
7 __SIZE_TYPE__ LIMIT;
8
9 // Warn when there is an alloca bound, but it is an unknown bound.
10
11 void
12 g1 (__SIZE_TYPE__ n)
13 {
14 void *p;
15 if (n < LIMIT)
16 p = __builtin_alloca (n); // { dg-warning "'alloca' bound is unknown" }
17 else
18 p = __builtin_malloc (n);
19 f (p);
20 }
21
22 // Similar to the above, but do not get confused by the upcast.
23
24 unsigned short SHORT_LIMIT;
25 void
26 g2 (unsigned short n)
27 {
28 void *p;
29 if (n < SHORT_LIMIT)
30 p = __builtin_alloca (n); // { dg-warning "'alloca' bound is unknown" }
31 else
32 p = __builtin_malloc (n);
33 f (p);
34 }