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/* PR middle-end/101300 - -fsanitize=undefined suppresses -Wuninitialized
for a VLA read at -O0
{ dg-do compile }
{ dg-options "-O0 -Wall -fsanitize=undefined" }
{ dg-require-effective-target alloca } */
int warn_vla_rd0 (int n)
{
char a[n];
return a[0]; // { dg-warning "\\\[-Wuninitialized]" }
}
int warn_vla_rd1 (int n)
{
char a[n];
return a[1]; // { dg-warning "\\\[-Wuninitialized]" }
}
int warn_vla_rdi (int n, int i)
{
char a[n];
return a[i]; // { dg-warning "\\\[-Wuninitialized]" }
}
int warn_vla_wr0_rd2_1_0 (int n)
{
char a[n];
a[0] = __LINE__;
int x = a[2]; // { dg-warning "\\\[-Wuninitialized]" }
int y = a[1]; // { dg-warning "\\\[-Wuninitialized]" }
int z = a[0];
return x + y + z;
}
int warn_vla_wr1_rd2_1_0 (int n)
{
char a[n];
a[1] = __LINE__;
int x = a[2]; // { dg-warning "\\\[-Wuninitialized]" }
int y = a[1];
int z = a[0]; // { dg-warning "\\\[-Wuninitialized]" }
return x + y + z;
}
int warn_vla_wr2_rd2_1_0 (int n)
{
char a[n];
a[2] = __LINE__;
int x = a[2];
int y = a[1]; // { dg-warning "\\\[-Wuninitialized]" }
int z = a[0]; // { dg-warning "\\\[-Wuninitialized]" }
return x + y + z;
}
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