llvm-project/clang/test/SemaCXX/vector.cpp

// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -verify %s
typedef char char16 __attribute__ ((__vector_size__ (16)));
typedef long long longlong16 __attribute__ ((__vector_size__ (16)));
typedef char char16_e __attribute__ ((__ext_vector_type__ (16)));
typedef long long longlong16_e __attribute__ ((__ext_vector_type__ (2)));

// Test overloading and function calls with vector types.
void f0(char16);

void f0_test(char16 c16, longlong16 ll16, char16_e c16e, longlong16_e ll16e) {
  f0(c16);
  f0(ll16);
  f0(c16e);
  f0(ll16e);
}

int &f1(char16); // expected-note 2{{candidate function}}
float &f1(longlong16); // expected-note 2{{candidate function}}

void f1_test(char16 c16, longlong16 ll16, char16_e c16e, longlong16_e ll16e) {
  int &ir1 = f1(c16);
  float &fr1 = f1(ll16);
  f1(c16e); // expected-error{{call to 'f1' is ambiguous}}
  f1(ll16e); // expected-error{{call to 'f1' is ambiguous}}
}

void f2(char16_e); // expected-note{{no known conversion from 'longlong16_e' to 'char16_e' for 1st argument}} \
       // expected-note{{candidate function not viable: no known conversion from 'convertible_to<longlong16_e>' to 'char16_e' for 1st argument}}

void f2_test(char16 c16, longlong16 ll16, char16_e c16e, longlong16_e ll16e) {
  f2(c16);
  f2(ll16);
  f2(c16e);
  f2(ll16e); // expected-error{{no matching function}}
  f2('a');
  f2(17);
}

// Test the conditional operator with vector types.
void conditional(bool Cond, char16 c16, longlong16 ll16, char16_e c16e, 
                 longlong16_e ll16e) {
  // Conditional operators with the same type.
  __typeof__(Cond? c16 : c16) *c16p1 = &c16;
  __typeof__(Cond? ll16 : ll16) *ll16p1 = &ll16;
  __typeof__(Cond? c16e : c16e) *c16ep1 = &c16e;
  __typeof__(Cond? ll16e : ll16e) *ll16ep1 = &ll16e;

  // Conditional operators with similar types.
  __typeof__(Cond? c16 : c16e) *c16ep2 = &c16e;
  __typeof__(Cond? c16e : c16) *c16ep3 = &c16e;
  __typeof__(Cond? ll16 : ll16e) *ll16ep2 = &ll16e;
  __typeof__(Cond? ll16e : ll16) *ll16ep3 = &ll16e;

  // Conditional operators with compatible types under -flax-vector-conversions (default)
  (void)(Cond? c16 : ll16);
  (void)(Cond? ll16e : c16e);
  (void)(Cond? ll16e : c16);
}

// Test C++ cast'ing of vector types.
void casts(longlong16 ll16, longlong16_e ll16e) {
  // C-style casts.
  (void)(char16)ll16;
  (void)(char16_e)ll16;
  (void)(longlong16)ll16;
  (void)(longlong16_e)ll16;
  (void)(char16)ll16e;
  (void)(char16_e)ll16e;
  (void)(longlong16)ll16e;
  (void)(longlong16_e)ll16e;

  // Function-style casts.
  (void)char16(ll16);
  (void)char16_e(ll16);
  (void)longlong16(ll16);
  (void)longlong16_e(ll16);
  (void)char16(ll16e);
  (void)char16_e(ll16e);
  (void)longlong16(ll16e);
  (void)longlong16_e(ll16e);

  // static_cast
  (void)static_cast<char16>(ll16);
  (void)static_cast<char16_e>(ll16);
  (void)static_cast<longlong16>(ll16);
  (void)static_cast<longlong16_e>(ll16);
  (void)static_cast<char16>(ll16e);
  (void)static_cast<char16_e>(ll16e); // expected-error{{static_cast from 'longlong16_e' to 'char16_e' is not allowed}}
  (void)static_cast<longlong16>(ll16e);
  (void)static_cast<longlong16_e>(ll16e);

  // reinterpret_cast
  (void)reinterpret_cast<char16>(ll16);
  (void)reinterpret_cast<char16_e>(ll16);
  (void)reinterpret_cast<longlong16>(ll16);
  (void)reinterpret_cast<longlong16_e>(ll16);
  (void)reinterpret_cast<char16>(ll16e);
  (void)reinterpret_cast<char16_e>(ll16e);
  (void)reinterpret_cast<longlong16>(ll16e);
  (void)reinterpret_cast<longlong16_e>(ll16e);
}

template<typename T>
struct convertible_to { // expected-note 3 {{candidate function (the implicit copy assignment operator)}}
  operator T() const;
};

void test_implicit_conversions(bool Cond, char16 c16, longlong16 ll16, 
                               char16_e c16e, longlong16_e ll16e,
                               convertible_to<char16> to_c16, 
                               convertible_to<longlong16> to_ll16, 
                               convertible_to<char16_e> to_c16e, 
                               convertible_to<longlong16_e> to_ll16e,
                               convertible_to<char16&> rto_c16,
                               convertible_to<char16_e&> rto_c16e) {
  f0(to_c16);
  f0(to_ll16);
  f0(to_c16e);
  f0(to_ll16e);
  f2(to_c16);
  f2(to_ll16);
  f2(to_c16e);
  f2(to_ll16e); // expected-error{{no matching function}}

  (void)(c16 == c16e);
  (void)(c16 == to_c16);
  (void)+to_c16;
  (void)-to_c16;
  (void)~to_c16;
  (void)(to_c16 == to_c16e);
  (void)(to_c16 != to_c16e);
  (void)(to_c16 <  to_c16e);
  (void)(to_c16 <= to_c16e);
  (void)(to_c16 >  to_c16e);
  (void)(to_c16 >= to_c16e);
  (void)(to_c16 + to_c16);
  (void)(to_c16 - to_c16);
  (void)(to_c16 * to_c16);
  (void)(to_c16 / to_c16);
  (void)(rto_c16 = to_c16); // expected-error{{no viable overloaded '='}}
  (void)(rto_c16 += to_c16);
  (void)(rto_c16 -= to_c16);
  (void)(rto_c16 *= to_c16);
  (void)(rto_c16 /= to_c16);

  (void)+to_c16e;
  (void)-to_c16e;
  (void)~to_c16e;
  (void)(to_c16e == to_c16e);
  (void)(to_c16e != to_c16e);
  (void)(to_c16e <  to_c16e);
  (void)(to_c16e <= to_c16e);
  (void)(to_c16e >  to_c16e);
  (void)(to_c16e >= to_c16e);
  (void)(to_c16e + to_c16);
  (void)(to_c16e - to_c16);
  (void)(to_c16e * to_c16);
  (void)(to_c16e / to_c16);
  (void)(rto_c16e = to_c16); // expected-error{{no viable overloaded '='}}
  (void)(rto_c16e += to_c16);
  (void)(rto_c16e -= to_c16);
  (void)(rto_c16e *= to_c16);
  (void)(rto_c16e /= to_c16);

  (void)+to_c16;
  (void)-to_c16;
  (void)~to_c16;
  (void)(to_c16 == to_c16e);
  (void)(to_c16 != to_c16e);
  (void)(to_c16 <  to_c16e);
  (void)(to_c16 <= to_c16e);
  (void)(to_c16 >  to_c16e);
  (void)(to_c16 >= to_c16e);
  (void)(to_c16 + to_c16e);
  (void)(to_c16 - to_c16e);
  (void)(to_c16 * to_c16e);
  (void)(to_c16 / to_c16e);
  (void)(rto_c16 = c16e); // expected-error{{no viable overloaded '='}}
  (void)(rto_c16 += to_c16e); // expected-error{{expression is not assignable}}
  (void)(rto_c16 -= to_c16e); // expected-error{{expression is not assignable}}
  (void)(rto_c16 *= to_c16e); // expected-error{{expression is not assignable}}
  (void)(rto_c16 /= to_c16e); // expected-error{{expression is not assignable}}

  (void)(Cond? to_c16 : to_c16e);
  (void)(Cond? to_ll16e : to_ll16);
  
  // These 2 are convertable with -flax-vector-conversions (default)
  (void)(Cond? to_c16 : to_ll16);
  (void)(Cond? to_c16e : to_ll16e);
}

typedef float fltx2 __attribute__((__vector_size__(8)));
typedef float fltx4 __attribute__((__vector_size__(16)));
typedef double dblx2 __attribute__((__vector_size__(16)));
typedef double dblx4 __attribute__((__vector_size__(32)));

void accept_fltx2(fltx2); // expected-note{{candidate function not viable: no known conversion from 'double' to 'fltx2' for 1st argument}}
void accept_fltx4(fltx4);
void accept_dblx2(dblx2);
void accept_dblx4(dblx4);
void accept_bool(bool); // expected-note{{candidate function not viable: no known conversion from 'fltx2' to 'bool' for 1st argument}}

void test(fltx2 fltx2_val, fltx4 fltx4_val, dblx2 dblx2_val, dblx4 dblx4_val) {
  // Exact matches
  accept_fltx2(fltx2_val);
  accept_fltx4(fltx4_val);
  accept_dblx2(dblx2_val);
  accept_dblx4(dblx4_val);

  // Same-size conversions
  // FIXME: G++ rejects these conversions, we accept them. Revisit this!
  accept_fltx4(dblx2_val);
  accept_dblx2(fltx4_val);

  // Conversion to bool.
  accept_bool(fltx2_val); // expected-error{{no matching function for call to 'accept_bool'}}

  // Scalar-to-vector conversions.
  accept_fltx2(1.0); // expected-error{{no matching function for call to 'accept_fltx2'}}
}