| 1 | // RUN: %clang_cc1 -verify -fblocks -cl-std=CL2.0 %s |
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| 2 | |
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| 3 | // OpenCL v2.0 s6.12.5 |
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| 4 | void f0(int (^const bl)()); |
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| 5 | // All blocks declarations must be const qualified and initialized. |
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| 6 | void f1() { |
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| 7 | int (^bl1)(void) = ^() { |
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| 8 | return 1; |
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| 9 | }; |
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| 10 | int (^const bl2)(void) = ^() { |
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| 11 | return 1; |
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| 12 | }; |
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| 13 | f0(bl1); |
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| 14 | f0(bl2); |
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| 15 | bl1 = bl2; // expected-error{{invalid operands to binary expression ('int (__generic ^const)(void)' and 'int (__generic ^const)(void)')}} |
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| 16 | int (^const bl3)(); // expected-error{{invalid block variable declaration - must be initialized}} |
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| 17 | } |
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| 18 | |
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| 19 | // A block with extern storage class is not allowed. |
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| 20 | extern int (^bl)(void) = ^() { // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}} |
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| 21 | return 1; |
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| 22 | }; |
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| 23 | void f2() { |
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| 24 | extern int (^bl)(void) = ^() { // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}} |
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| 25 | return 1; |
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| 26 | }; |
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| 27 | } |
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| 28 | |
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| 29 | // A block cannot be the return value of a function. |
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| 30 | typedef int (^bl_t)(void); |
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| 31 | bl_t f3(bl_t bl); // expected-error{{declaring function return value of type 'bl_t' (aka 'int (__generic ^const)(void)') is not allowed}} |
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| 32 | |
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| 33 | struct bl_s { |
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| 34 | int (^bl)(void); // expected-error {{the 'int (__generic ^const)(void)' type cannot be used to declare a structure or union field}} |
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| 35 | }; |
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| 36 | |
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| 37 | void f4() { |
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| 38 | __block int a = 10; // expected-error {{the __block storage type is not permitted}} |
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| 39 | } |
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| 40 | |
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| 41 | // A block with variadic argument is not allowed. |
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| 42 | 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}} |
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| 43 | return 0; |
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| 44 | }; |
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| 45 | typedef int (^bl1_t)(int, ...); // expected-error {{invalid prototype, variadic arguments are not allowed in OpenCL}} |
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| 46 | |
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| 47 | // A block can't be used to declare an array |
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| 48 | typedef int (^bl2_t)(int); |
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| 49 | void f5(int i) { |
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| 50 | bl2_t bl1 = ^(int i) { |
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| 51 | return 1; |
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| 52 | }; |
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| 53 | bl2_t bl2 = ^(int i) { |
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| 54 | return 2; |
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| 55 | }; |
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| 56 | bl2_t arr[] = {bl1, bl2}; // expected-error {{array of 'bl2_t' (aka 'int (__generic ^const)(int)') type is invalid in OpenCL}} |
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| 57 | int tmp = i ? bl1(i) // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}} |
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| 58 | : bl2(i); // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}} |
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| 59 | } |
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| 60 | // A block pointer type and all pointer operations are disallowed |
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| 61 | void f6(bl2_t *bl_ptr) { // expected-error{{pointer to type '__generic bl2_t' (aka 'int (__generic ^const __generic)(int)') is invalid in OpenCL}} |
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| 62 | bl2_t bl = ^(int i) { |
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| 63 | return 1; |
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| 64 | }; |
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| 65 | bl2_t *p; // expected-error {{pointer to type '__generic bl2_t' (aka 'int (__generic ^const __generic)(int)') is invalid in OpenCL}} |
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| 66 | *bl; // expected-error {{invalid argument type 'bl2_t' (aka 'int (__generic ^const)(int)') to unary expression}} |
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| 67 | &bl; // expected-error {{invalid argument type 'bl2_t' (aka 'int (__generic ^const)(int)') to unary expression}} |
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| 68 | } |
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| 69 | // A block can't reference another block |
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| 70 | kernel void f7() { |
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| 71 | bl2_t bl1 = ^(int i) { |
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| 72 | return 1; |
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| 73 | }; |
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| 74 | void (^bl2)(void) = ^{ |
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| 75 | int i = bl1(1); // expected-error {{cannot refer to a block inside block}} |
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| 76 | }; |
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| 77 | void (^bl3)(void) = ^{ |
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| 78 | }; |
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| 79 | void (^bl4)(void) = ^{ |
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| 80 | bl3(); // expected-error {{cannot refer to a block inside block}} |
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| 81 | }; |
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| 82 | return; |
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| 83 | } |
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| 84 | |
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| 85 | // Taking address of a capture is not allowed |
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| 86 | int g; |
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| 87 | kernel void f8(int a1) { |
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| 88 | int a2; |
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| 89 | void (^bl)(void) = ^(void) { |
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| 90 | &g; //expected-warning{{expression result unused}} |
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| 91 | &a1; //expected-error{{taking address of a capture is not allowed}} |
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| 92 | &a2; //expected-error{{taking address of a capture is not allowed}} |
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| 93 | }; |
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| 94 | } |
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| 95 | |
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