71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
/* { dg-do compile } */
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/* { dg-require-effective-target stdint_types } */
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/* { dg-require-effective-target alloca } */
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/* { dg-options "-O2 -Wvla-larger-than=40" } */
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#include <stdint.h>
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void f0 (void *);
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void
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f1 (__SIZE_TYPE__ a)
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{
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if (a <= 10)
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{
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// 10 * 4 bytes = 40: OK!
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uint32_t x[a];
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f0 (x);
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}
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}
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void
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f2 (__SIZE_TYPE__ a)
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{
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if (a <= 11)
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{
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// 11 * 4 bytes = 44: Not OK.
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uint32_t x[a]; // { dg-warning "array may be too large" }
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f0 (x);
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}
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}
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void
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f3 (__SIZE_TYPE__ a, __SIZE_TYPE__ b)
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{
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if (a <= 5 && b <= 3)
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{
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// 5 * 3 * 4 bytes = 60: Not OK.
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uint32_t x[a][b]; // { dg-warning "array may be too large" }
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f0 (x);
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}
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}
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void
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f4 (__SIZE_TYPE__ a, __SIZE_TYPE__ b)
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{
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if (a <= 5 && b <= 2)
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{
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// 5 * 2 * 4 bytes = 40 bytes: OK!
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uint32_t x[a][b];
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f0 (x);
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}
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}
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void
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f5 (__SIZE_TYPE__ len)
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{
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// Test that a direct call to __builtin_alloca_with_align is not
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// confused with a VLA.
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void *p = __builtin_alloca_with_align (len, 8);
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f0 (p);
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}
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void
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f6 (unsigned stuff)
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{
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int n = 7000;
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do {
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char a[n]; // { dg-warning "variable-length array is too large" }
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f0 (a);
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} while (stuff--);
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}
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