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1// RUN: %clang_cc1 -fsyntax-only -verify=expected,conly -triple wasm32 -Wno-unused-value -target-feature +reference-types %s2// RUN: %clang_cc1 -x c++ -std=c++17 -fsyntax-only -verify=expected,cpp -triple wasm32 -Wno-unused-value -target-feature +reference-types %s3 4// Note: As WebAssembly references are sizeless types, we don't exhaustively5// test for cases covered by sizeless-1.c and similar tests.6 7// Unlike standard sizeless types, reftype globals are supported.8__externref_t r1;9extern __externref_t r2;10static __externref_t r3;11 12__externref_t *t1; // expected-error {{pointer to WebAssembly reference type is not allowed}}13__externref_t **t2; // expected-error {{pointer to WebAssembly reference type is not allowed}}14__externref_t ******t3; // expected-error {{pointer to WebAssembly reference type is not allowed}}15static __externref_t t4[3]; // expected-error {{only zero-length WebAssembly tables are currently supported}}16static __externref_t t5[]; // expected-error {{only zero-length WebAssembly tables are currently supported}}17static __externref_t t6[] = {0}; // expected-error {{only zero-length WebAssembly tables are currently supported}}18__externref_t t7[0]; // expected-error {{WebAssembly table must be static}}19static __externref_t t8[0][0]; // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}20static __externref_t (*t9)[0]; // expected-error {{cannot form a pointer to a WebAssembly table}}21 22static __externref_t table[0];23static __externref_t other_table[0] = {};24static __externref_t another_table[] = {}; // expected-error {{only zero-length WebAssembly tables are currently supported}}25 26struct s {27 __externref_t f1; // expected-error {{field has sizeless type '__externref_t'}}28 __externref_t f2[0]; // expected-error {{field has sizeless type '__externref_t'}}29 __externref_t f3[]; // expected-error {{field has sizeless type '__externref_t'}}30 __externref_t f4[0][0]; // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}31 __externref_t *f5; // expected-error {{pointer to WebAssembly reference type is not allowed}}32 __externref_t ****f6; // expected-error {{pointer to WebAssembly reference type is not allowed}}33 __externref_t (*f7)[0]; // expected-error {{cannot form a pointer to a WebAssembly table}}34};35 36union u {37 __externref_t f1; // expected-error {{field has sizeless type '__externref_t'}}38 __externref_t f2[0]; // expected-error {{field has sizeless type '__externref_t'}}39 __externref_t f3[]; // expected-error {{field has sizeless type '__externref_t'}}40 __externref_t f4[0][0]; // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}41 __externref_t *f5; // expected-error {{pointer to WebAssembly reference type is not allowed}}42 __externref_t ****f6; // expected-error {{pointer to WebAssembly reference type is not allowed}}43 __externref_t (*f7)[0]; // expected-error {{cannot form a pointer to a WebAssembly table}}44};45 46void illegal_argument_1(__externref_t table[]); // expected-error {{cannot use WebAssembly table as a function parameter}}47void illegal_argument_2(__externref_t table[0][0]); // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}48void illegal_argument_3(__externref_t *table); // expected-error {{pointer to WebAssembly reference type is not allowed}}49void illegal_argument_4(__externref_t ***table); // expected-error {{pointer to WebAssembly reference type is not allowed}}50void illegal_argument_5(__externref_t (*table)[0]); // expected-error {{cannot form a pointer to a WebAssembly table}}51void illegal_argument_6(__externref_t table[0]); // expected-error {{cannot use WebAssembly table as a function parameter}}52 53__externref_t *illegal_return_1(); // expected-error {{pointer to WebAssembly reference type is not allowed}}54__externref_t ***illegal_return_2(); // expected-error {{pointer to WebAssembly reference type is not allowed}}55__externref_t (*illegal_return_3())[0]; // expected-error {{cannot form a pointer to a WebAssembly table}}56 57void varargs(int, ...);58typedef void (*__funcref funcref_t)();59typedef void (*__funcref __funcref funcref_fail_t)(); // expected-warning {{attribute '__funcref' is already applied}}60 61__externref_t func(__externref_t ref) {62 &ref; // expected-error {{cannot take address of WebAssembly reference}}63 int foo = 40;64 (__externref_t *)(&foo); // expected-error {{pointer to WebAssembly reference type is not allowed}}65 (__externref_t ****)(&foo); // expected-error {{pointer to WebAssembly reference type is not allowed}}66 sizeof(ref); // expected-error {{invalid application of 'sizeof' to sizeless type '__externref_t'}}67 sizeof(__externref_t); // expected-error {{invalid application of 'sizeof' to sizeless type '__externref_t'}}68 sizeof(__externref_t[0]); // expected-error {{invalid application of 'sizeof' to WebAssembly table}}69 sizeof(table); // expected-error {{invalid application of 'sizeof' to WebAssembly table}}70 sizeof(__externref_t[0][0]); // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}71 sizeof(__externref_t *); // expected-error {{pointer to WebAssembly reference type is not allowed}}72 sizeof(__externref_t ***); // expected-error {{pointer to WebAssembly reference type is not allowed}};73 // expected-warning@+1 {{'_Alignof' applied to an expression is a GNU extension}}74 _Alignof(ref); // expected-error {{invalid application of 'alignof' to sizeless type '__externref_t'}}75 _Alignof(__externref_t); // expected-error {{invalid application of 'alignof' to sizeless type '__externref_t'}}76 _Alignof(__externref_t[]); // expected-error {{invalid application of 'alignof' to sizeless type '__externref_t'}}77 _Alignof(__externref_t[0]); // expected-error {{invalid application of 'alignof' to sizeless type '__externref_t'}}78 _Alignof(table); // expected-warning {{'_Alignof' applied to an expression is a GNU extension}} expected-error {{invalid application of 'alignof' to WebAssembly table}}79 _Alignof(__externref_t[0][0]); // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}80 _Alignof(__externref_t *); // expected-error {{pointer to WebAssembly reference type is not allowed}}81 _Alignof(__externref_t ***); // expected-error {{pointer to WebAssembly reference type is not allowed}};82 varargs(1, ref); // expected-error {{cannot pass expression of type '__externref_t' to variadic function}}83 84 __externref_t lt1[0]; // expected-error {{WebAssembly table cannot be declared within a function}}85 static __externref_t lt2[0]; // expected-error {{WebAssembly table cannot be declared within a function}}86 static __externref_t lt3[0][0]; // expected-error {{multi-dimensional arrays of WebAssembly references are not allowed}}87 static __externref_t(*lt4)[0]; // expected-error {{cannot form a pointer to a WebAssembly table}}88 // conly-error@+2 {{cannot use WebAssembly table as a function parameter}}89 // cpp-error@+1 {{no matching function for call to 'illegal_argument_1'}}90 illegal_argument_1(table);91 varargs(1, table); // expected-error {{cannot use WebAssembly table as a function parameter}}92 table == 1; // expected-error {{invalid operands to binary expression ('__attribute__((address_space(1))) __externref_t[0]' and 'int')}}93 1 >= table; // expected-error {{invalid operands to binary expression ('int' and '__attribute__((address_space(1))) __externref_t[0]')}}94 table == other_table; // expected-error {{invalid operands to binary expression ('__attribute__((address_space(1))) __externref_t[0]' and '__attribute__((address_space(1))) __externref_t[0]')}}95 table !=- table; // expected-error {{invalid argument type '__attribute__((address_space(1))) __externref_t *' to unary expression}}96 !table; // expected-error {{invalid argument type '__attribute__((address_space(1))) __externref_t *' to unary expression}}97 1 && table; // expected-error {{invalid operands to binary expression ('int' and '__attribute__((address_space(1))) __externref_t[0]')}}98 table || 1; // expected-error {{invalid operands to binary expression ('__attribute__((address_space(1))) __externref_t[0]' and 'int')}}99 1 ? table : table; // expected-error {{cannot use a WebAssembly table within a branch of a conditional expression}}100 table ? : other_table; // expected-error {{cannot use a WebAssembly table within a branch of a conditional expression}}101 (void *)table; // expected-error {{cannot cast from a WebAssembly table}}102 void *u;103 u = table; // expected-error {{cannot assign a WebAssembly table}}104 void *v = table; // expected-error {{cannot assign a WebAssembly table}}105 &table; // expected-error {{cannot form a reference to a WebAssembly table}}106 (void)table;107 108 table[0]; // expected-error {{cannot subscript a WebAssembly table}}109 table[0] = ref; // expected-error {{cannot subscript a WebAssembly table}}110 111 int i = 0; // cpp-note {{declared here}}112 __externref_t oh_no_vlas[i]; // expected-error {{WebAssembly table cannot be declared within a function}} \113 cpp-warning {{variable length arrays in C++ are a Clang extension}} \114 cpp-note {{read of non-const variable 'i' is not allowed in a constant expression}}115 116 return ref;117}118 119void foo() {120 static __externref_t t[0]; // expected-error {{WebAssembly table cannot be declared within a function}}121 {122 static __externref_t t2[0]; // expected-error {{WebAssembly table cannot be declared within a function}}123 for (;;) {124 static __externref_t t3[0]; // expected-error {{WebAssembly table cannot be declared within a function}}125 }126 }127 int i = ({128 static __externref_t t4[0]; // expected-error {{WebAssembly table cannot be declared within a function}}129 1;130 });131}132 133void *ret_void_ptr() {134 return table; // expected-error {{cannot return a WebAssembly table}}135}136