clang/test/SemaOpenCL/invalid-block.cl

   1 // RUN: %clang_cc1 -verify -fblocks -cl-std=CL2.0 %s
   2 // RUN: %clang_cc1 -verify -fblocks -cl-std=CL3.0 -cl-ext=-all,+__opencl_c_device_enqueue,+__opencl_c_generic_address_space,+__opencl_c_program_scope_global_variables  %s
   3 // OpenCL v2.0 s6.12.5
   4 void f0(int (^const bl)(void)); // expected-error{{declaring function parameter of type 'int (__generic ^const __private)(void)' is not allowed}}
   5 // All blocks declarations must be const qualified and initialized.
   6 void f1(void) {
   7   int (^bl1)(void) = ^(void) {
   8     return 1;
   9   };
  10   int (^const bl2)(void) = ^(void) {
  11     return 1;
  12   };
  13   f0(bl1);
  14   f0(bl2);
  15   bl1 = bl2;          // expected-error{{invalid operands to binary expression ('int (__generic ^const __private)(void)' and 'int (__generic ^const __private)(void)')}}
  16   int (^const bl3)(void); // expected-error{{invalid block variable declaration - must be initialized}}
  17 }
  18
  19 // A block with extern storage class is not allowed.
  20 extern int (^bl)(void) = ^(void) { // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}}
  21   return 1;
  22 };
  23 void f2() {
  24   extern int (^bl)(void) = ^(void) { // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}}
  25     return 1;
  26   };
  27 }
  28
  29 // A block cannot be the return value or parameter of a function.
  30 typedef int (^bl_t)(void);
  31 bl_t f3a(int);     // expected-error{{declaring function return value of type 'bl_t' (aka 'int (__generic ^const)(void)') is not allowed}}
  32 bl_t f3b(bl_t bl);
  33 // expected-error@-1{{declaring function return value of type 'bl_t' (aka 'int (__generic ^const)(void)') is not allowed}}
  34 // expected-error@-2{{declaring function parameter of type '__private bl_t' (aka 'int (__generic ^const __private)(void)') is not allowed}}
  35 void f3c(void) {
  36   // Block with a block argument.
  37   int (^const bl2)(bl_t block_arg) = ^(void) { // expected-error{{declaring function parameter of type '__private bl_t' (aka 'int (__generic ^const __private)(void)') is not allowed}}
  38     return block_arg(); // expected-error{{use of undeclared identifier 'block_arg'}}
  39   };
  40 }
  41
  42 struct bl_s {
  43   int (^bl)(void); // expected-error {{the 'int (__generic ^const)(void)' type cannot be used to declare a structure or union field}}
  44 };
  45
  46 void f4() {
  47   __block int a = 10; // expected-error {{the __block storage type is not permitted}}
  48 }
  49
  50 // A block with variadic argument is not allowed.
  51 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}}
  52   return 0;
  53 };
  54 typedef int (^bl1_t)(int, ...); // expected-error {{invalid prototype, variadic arguments are not allowed in OpenCL}}
  55
  56 // A block can't be used to declare an array
  57 typedef int (^bl2_t)(int);
  58 void f5(int i) {
  59   bl2_t bl1 = ^(int i) {
  60     return 1;
  61   };
  62   bl2_t bl2 = ^(int i) {
  63     return 2;
  64   };
  65   bl2_t arr[] = {bl1, bl2}; // expected-error {{array of 'bl2_t' (aka 'int (__generic ^const)(__private int)') type is invalid in OpenCL}}
  66   int tmp = i ? bl1(i)      // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}}
  67               : bl2(i);     // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}}
  68 }
  69 // A block pointer type and all pointer operations are disallowed
  70 void f6(bl2_t *bl_ptr) { // expected-error{{pointer to type 'bl2_t' (aka 'int (__generic ^const)(__private int)') is invalid in OpenCL}}
  71   bl2_t bl = ^(int i) {
  72     return 1;
  73   };
  74   bl2_t *p; // expected-error {{pointer to type 'bl2_t' (aka 'int (__generic ^const)(__private int)') is invalid in OpenCL}}
  75   *bl;      // expected-error {{invalid argument type '__private bl2_t' (aka 'int (__generic ^const __private)(__private int)') to unary expression}}
  76   &bl;      // expected-error {{invalid argument type '__private bl2_t' (aka 'int (__generic ^const __private)(__private int)') to unary expression}}
  77 }
  78 // A block can't reference another block
  79 kernel void f7(void) {
  80   bl2_t bl1 = ^(int i) {
  81     return 1;
  82   };
  83   void (^bl2)(void) = ^{
  84     int i = bl1(1); // expected-error {{cannot refer to a block inside block}}
  85   };
  86   void (^bl3)(void) = ^{
  87   };
  88   void (^bl4)(void) = ^{
  89     bl3(); // expected-error {{cannot refer to a block inside block}}
  90   };
  91   return;
  92 }
  93
  94 // Taking address of a capture is not allowed
  95 int g;
  96 kernel void f8(int a1) {
  97   int a2;
  98   void (^bl)(void) = ^(void) {
  99     &g; //expected-warning{{expression result unused}}
 100     &a1; //expected-error{{taking address of a capture is not allowed}}
 101     &a2; //expected-error{{taking address of a capture is not allowed}}
 102   };
 103 }