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Add test for PR middle-end/100571.

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gcc/testsuite:
	PR middle-end/100571
	* gcc.dg/Wstringop-overflow-67.c: New test.
This commit is contained in:
Martin Sebor 2021-05-12 15:57:34 -06:00
parent d902a1b576
commit db514f98a3
1 changed files with 92 additions and 0 deletions
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gcc/testsuite/gcc.dg/Wstringop-overflow-67.c Normal file
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/* PR middle-end/100571 - bogus -Wstringop-overflow with VLA of elements
larger than byte
{ dg-do compile }
{ dg-options "-O2 -Wall" } */
__attribute__ ((access (read_only, 1, 2))) void fro (int *, int);
__attribute__ ((access (write_only, 1, 2))) void fwo (int *, int);
__attribute__ ((access (read_write, 1, 2))) void frw (int *, int);
extern __SIZE_TYPE__ n;
void alloca_ro (void)
{
int *a = __builtin_alloca (n * sizeof *a);
a[0] = 0;
fro (a, n);
}
void alloca_wo (void)
{
int *a = __builtin_alloca (n * sizeof *a);
fwo (a, n);
}
void alloca_rw (void)
{
int *a = __builtin_alloca (n * sizeof *a);
a[0] = 0;
frw (a, n);
}
void calloc_ro (void)
{
int *a = __builtin_calloc (n, sizeof *a);
fro (a, n);
}
void calloc_wo (void)
{
int *a = __builtin_calloc (n, sizeof *a);
fwo (a, n);
}
void calloc_rw (void)
{
int *a = __builtin_calloc (n, sizeof *a);
a[0] = 0;
frw (a, n);
}
void malloc_ro (void)
{
int *a = __builtin_malloc (n * sizeof *a);
a[0] = 0;
fro (a, n);
}
void malloc_wo (void)
{
int *a = __builtin_malloc (n * sizeof *a);
fwo (a, n);
}
void malloc_rw (void)
{
int *a = __builtin_malloc (n * sizeof *a);
a[0] = 0;
frw (a, n);
}
void vla_ro (void)
{
int a[n];
a[0] = 0;
fro (a, n);
}
void vla_wo (void)
{
int a[n];
fwo (a, n);
}
void vla_rw (void)
{
int a[n];
a[0] = 0;
frw (a, n);
}