clang/test/SemaCXX/vector-casts.cpp

   1 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown -fsyntax-only -verify %s
   2 typedef int __v2si __attribute__((__vector_size__(8)));
   3 typedef short __v4hi __attribute__((__vector_size__(8)));
   4 typedef short __v8hi __attribute__((__vector_size__(16)));
   5 typedef short __v3hi __attribute__((__ext_vector_type__(3)));
   6
   7 struct S { }; // expected-note 3 {{candidate constructor}}
   8
   9 enum E : long long { Evalue };
  10
  11 void f() {
  12   __v2si v2si;
  13   __v3hi v3hi;
  14   __v4hi v4hi;
  15   __v8hi v8hi;
  16   unsigned long long ll;
  17   unsigned char c;
  18   S s;
  19   E e;
  20
  21   (void)reinterpret_cast<__v2si>(v4hi);
  22   (void)(__v2si)v4hi;
  23   (void)reinterpret_cast<__v4hi>(v2si);
  24   (void)(__v4hi)v2si;
  25   (void)reinterpret_cast<unsigned long long>(v2si);
  26   (void)(unsigned long long)v2si;
  27   (void)reinterpret_cast<__v2si>(ll);
  28   (void)(__v2si)(ll);
  29
  30   (void)(E)v2si; // expected-error {{C-style cast from '__v2si' (vector of 2 'int' values) to 'E' is not allowed}}
  31   (void)(__v2si)e; // expected-error {{C-style cast from 'E' to '__v2si' (vector of 2 'int' values)}}
  32   (void)reinterpret_cast<E>(v2si); // expected-error {{reinterpret_cast from '__v2si' (vector of 2 'int' values) to 'E' is not allowed}}
  33   (void)reinterpret_cast<__v2si>(e); // expected-error {{reinterpret_cast from 'E' to '__v2si' (vector of 2 'int' values)}}
  34
  35   (void)reinterpret_cast<S>(v2si); // expected-error {{reinterpret_cast from '__v2si' (vector of 2 'int' values) to 'S' is not allowed}}
  36   (void)(S)v2si; // expected-error {{no matching conversion for C-style cast from '__v2si' (vector of 2 'int' values) to 'S'}}
  37   (void)reinterpret_cast<__v2si>(s); // expected-error {{reinterpret_cast from 'S' to '__v2si' (vector of 2 'int' values) is not allowed}}
  38   (void)(__v2si)s; // expected-error {{cannot convert 'S' to '__v2si' (vector of 2 'int' values) without a conversion operator}}
  39
  40   (void)reinterpret_cast<unsigned char>(v2si); // expected-error {{reinterpret_cast from vector '__v2si' (vector of 2 'int' values) to scalar 'unsigned char' of different size}}
  41   (void)(unsigned char)v2si; // expected-error {{C-style cast from vector '__v2si' (vector of 2 'int' values) to scalar 'unsigned char' of different size}}
  42   (void)reinterpret_cast<__v2si>(c); // expected-error {{reinterpret_cast from scalar 'unsigned char' to vector '__v2si' (vector of 2 'int' values) of different size}}
  43
  44   (void)reinterpret_cast<__v8hi>(v4hi); // expected-error {{reinterpret_cast from vector '__v4hi' (vector of 4 'short' values) to vector '__v8hi' (vector of 8 'short' values) of different size}}
  45   (void)(__v8hi)v4hi; // expected-error {{C-style cast from vector '__v4hi' (vector of 4 'short' values) to vector '__v8hi' (vector of 8 'short' values) of different size}}
  46   (void)reinterpret_cast<__v4hi>(v8hi); // expected-error {{reinterpret_cast from vector '__v8hi' (vector of 8 'short' values) to vector '__v4hi' (vector of 4 'short' values) of different size}}
  47   (void)(__v4hi)v8hi; // expected-error {{C-style cast from vector '__v8hi' (vector of 8 'short' values) to vector '__v4hi' (vector of 4 'short' values) of different size}}
  48
  49   (void)(__v3hi)v4hi; // expected-error {{C-style cast from vector '__v4hi' (vector of 4 'short' values) to vector '__v3hi' (vector of 3 'short' values) of different size}}
  50   (void)(__v3hi)v2si; // expected-error {{C-style cast from vector '__v2si' (vector of 2 'int' values) to vector '__v3hi' (vector of 3 'short' values) of different size}}
  51   (void)(__v4hi)v3hi; // expected-error {{C-style cast from vector '__v3hi' (vector of 3 'short' values) to vector '__v4hi' (vector of 4 'short' values) of different size}}
  52   (void)(__v2si)v3hi; // expected-error {{C-style cast from vector '__v3hi' (vector of 3 'short' values) to vector '__v2si' (vector of 2 'int' values) of different size}}
  53   (void)reinterpret_cast<__v3hi>(v4hi); // expected-error {{reinterpret_cast from vector '__v4hi' (vector of 4 'short' values) to vector '__v3hi' (vector of 3 'short' values) of different size}}
  54   (void)reinterpret_cast<__v3hi>(v2si); // expected-error {{reinterpret_cast from vector '__v2si' (vector of 2 'int' values) to vector '__v3hi' (vector of 3 'short' values) of different size}}
  55   (void)reinterpret_cast<__v4hi>(v3hi); // expected-error {{reinterpret_cast from vector '__v3hi' (vector of 3 'short' values) to vector '__v4hi' (vector of 4 'short' values) of different size}}
  56   (void)reinterpret_cast<__v2si>(v3hi); // expected-error {{reinterpret_cast from vector '__v3hi' (vector of 3 'short' values) to vector '__v2si' (vector of 2 'int' values) of different size}}
  57 }
  58
  59 struct testvec {
  60   __v2si v;
  61   void madd(const testvec& rhs) {
  62     v = v + rhs; // expected-error {{cannot convert between vector and non-scalar values}}
  63   }
  64   void madd2(testvec rhs) {
  65     v = v + rhs; // expected-error {{cannot convert between vector and non-scalar values}}
  66   }
  67 };
  68
  69 //   Conversions for return values.
  70 __v4hi threeToFour(__v3hi v) { // expected-note {{not viable}}
  71   return v; // expected-error {{cannot initialize return object}}
  72 }
  73 __v3hi fourToThree(__v4hi v) { // expected-note {{not viable}}
  74   return v; // expected-error {{cannot initialize return object}}
  75 }
  76 //   Conversions for calls.
  77 void call3to4(__v4hi v) {
  78   (void) threeToFour(v); // expected-error {{no matching function for call}}
  79 }
  80 void call4to3(__v3hi v) {
  81   (void) fourToThree(v); // expected-error {{no matching function for call}}
  82 }