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// RUN: %clang_cc1 -verify -fblocks -cl-std=CL2.0 %s
// OpenCL v2.0 s6.12.5
void f0(int (^const bl)());
// All blocks declarations must be const qualified and initialized.
void f1() {
int (^bl1)(void) = ^() {
return 1;
};
int (^const bl2)(void) = ^() {
return 1;
};
f0(bl1);
f0(bl2);
bl1 = bl2; // expected-error{{invalid operands to binary expression ('int (__generic ^const)(void)' and 'int (__generic ^const)(void)')}}
int (^const bl3)(); // expected-error{{invalid block variable declaration - must be initialized}}
}
// A block with extern storage class is not allowed.
extern int (^bl)(void) = ^() { // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}}
return 1;
};
void f2() {
extern int (^bl)(void) = ^() { // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}}
return 1;
};
}
// A block cannot be the return value of a function.
typedef int (^bl_t)(void);
bl_t f3(bl_t bl); // expected-error{{declaring function return value of type 'bl_t' (aka 'int (__generic ^const)(void)') is not allowed}}
struct bl_s {
int (^bl)(void); // expected-error {{the 'int (__generic ^const)(void)' type cannot be used to declare a structure or union field}}
};
void f4() {
__block int a = 10; // expected-error {{the __block storage type is not permitted}}
}
// A block with variadic argument is not allowed.
int (^bl)(int, ...) = ^int(int I, ...) { // expected-error {{invalid prototype, variadic arguments are not allowed in OpenCL}} expected-error {{invalid prototype, variadic arguments are not allowed in OpenCL}}
return 0;
};
typedef int (^bl1_t)(int, ...); // expected-error {{invalid prototype, variadic arguments are not allowed in OpenCL}}
// A block can't be used to declare an array
typedef int (^bl2_t)(int);
void f5(int i) {
bl2_t bl1 = ^(int i) {
return 1;
};
bl2_t bl2 = ^(int i) {
return 2;
};
bl2_t arr[] = {bl1, bl2}; // expected-error {{array of 'bl2_t' (aka 'int (__generic ^const)(int)') type is invalid in OpenCL}}
int tmp = i ? bl1(i) // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}}
: bl2(i); // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}}
}
// A block pointer type and all pointer operations are disallowed
void f6(bl2_t *bl_ptr) { // expected-error{{pointer to type '__generic bl2_t' (aka 'int (__generic ^const __generic)(int)') is invalid in OpenCL}}
bl2_t bl = ^(int i) {
return 1;
};
bl2_t *p; // expected-error {{pointer to type '__generic bl2_t' (aka 'int (__generic ^const __generic)(int)') is invalid in OpenCL}}
*bl; // expected-error {{invalid argument type 'bl2_t' (aka 'int (__generic ^const)(int)') to unary expression}}
&bl; // expected-error {{invalid argument type 'bl2_t' (aka 'int (__generic ^const)(int)') to unary expression}}
}
// A block can't reference another block
kernel void f7() {
bl2_t bl1 = ^(int i) {
return 1;
};
void (^bl2)(void) = ^{
int i = bl1(1); // expected-error {{cannot refer to a block inside block}}
};
void (^bl3)(void) = ^{
};
void (^bl4)(void) = ^{
bl3(); // expected-error {{cannot refer to a block inside block}}
};
return;
}
// Taking address of a capture is not allowed
int g;
kernel void f8(int a1) {
int a2;
void (^bl)(void) = ^(void) {
&g; //expected-warning{{expression result unused}}
&a1; //expected-error{{taking address of a capture is not allowed}}
&a2; //expected-error{{taking address of a capture is not allowed}}
};
}
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