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/* PR middle-end/91458 - inconsistent warning for writing past the end
of an array member
{ dg-do compile }
{ dg-options "-O2 -fno-tree-vectorize -Wall -Wno-array-bounds -fno-ipa-icf" } */
void sink (void*);
// Exercise trailing one-element array members.
struct A1
{
char n;
char a[1]; // { dg-message "destination object" "note" }
};
// Verify warning for access to a definition with an initializer that doesn't
// initialize the one-element array member.
struct A1 a1__ = { 0 };
void ga1__ (void)
{
a1__.a[0] = 0;
a1__.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a1__.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
struct A1 a = { 1 };
a.a[0] = 0;
a.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
sink (&a);
}
// Verify warning for access to a definition with an initializer that
// initializes the one-element array member to empty.
struct A1 a1_0 = { 0, { } };
void ga1_0_ (void)
{
a1_0.a[0] = 0;
a1_0.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a1_0.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
struct A1 a = { 1, { } };
a.a[0] = 0;
a.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
sink (&a);
}
// Verify warning for access to a definition with an initializer that
// initializes the one-element array member.
struct A1 a1_1 = { 0, { 1 } };
void ga1_1 (void)
{
a1_1.a[0] = 0;
a1_1.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a1_1.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
struct A1 a = { 0, { 1 } };
a.a[0] = 0;
a.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
sink (&a);
}
// Exercise interior one-element array members (verify they're not
// treated as trailing.
struct A1i
{
char n;
char a[1]; // { dg-message "destination object" }
char x;
};
// Verify warning for access to a definition with an initializer that doesn't
// initialize the one-element array member.
struct A1i a1i__ = { 0 };
void ga1i__ (void)
{
a1i__.a[0] = 0;
a1i__.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a1i__.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
struct A1i a = { 0 };
a.a[0] = 0;
a.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
sink (&a);
}
// Verify warning for access to a definition with an initializer that
// initializes the one-element array member to empty.
struct A1 a1i_0 = { 0, { } };
void ga1i_0_ (void)
{
a1i_0.a[0] = 0;
a1i_0.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a1i_0.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
struct A1 a = { 0, { } };
a.a[0] = 0;
a.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
sink (&a);
}
// Verify warning for access to a definition with an initializer that
// initializes the one-element array member.
struct A1 a1i_1 = { 0, { 1 } };
void ga1i_1 (void)
{
a1i_1.a[0] = 0;
a1i_1.a[1] = 1; // { dg-warning "\\\[-Wstringop-overflow" }
a1i_1.a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
struct A1 a = { 0, { 1 } };
a.a[0] = 1;
a.a[1] = 2; // { dg-warning "\\\[-Wstringop-overflow" }
a.a[2] = 3; // { dg-warning "\\\[-Wstringop-overflow" }
sink (&a);
}
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