Files
clang-p2996/clang/test/Sema/ext_vector_casts.c
Douglas Gregor c68e140657 Improve diagnostics when we fail to convert from a source type to a
destination type for initialization, assignment, parameter-passing,
etc. The main issue fixed here is that we used rather confusing
wording for diagnostics such as

t.c:2:9: warning: initializing 'char const [2]' discards qualifiers,
      expected 'char *' [-pedantic]
  char *name = __func__;
        ^      ~~~~~~~~

We're not initializing a 'char const [2]', we're initializing a 'char
*' with an expression of type 'char const [2]'. Similar problems
existed for other diagnostics in this area, so I've normalized them all
with more precise descriptive text to say what we're
initializing/converting/assigning/etc. from and to. The warning for
the code above is now:

t.c:2:9: warning: initializing 'char *' from an expression of type
      'char const [2]' discards qualifiers [-pedantic]
  char *name = __func__;
        ^      ~~~~~~~~

Fixes <rdar://problem/7447179>.

llvm-svn: 100832
2010-04-09 00:35:39 +00:00

46 lines
1.6 KiB
C

// RUN: %clang_cc1 -fsyntax-only -verify %s
typedef __attribute__(( ext_vector_type(2) )) float float2;
typedef __attribute__(( ext_vector_type(4) )) int int4;
typedef __attribute__(( ext_vector_type(8) )) short short8;
typedef __attribute__(( ext_vector_type(4) )) float float4;
typedef float t3 __attribute__ ((vector_size (16)));
static void test() {
float2 vec2;
float4 vec4, vec4_2;
int4 ivec4;
short8 ish8;
t3 vec4_3;
int *ptr;
int i;
vec4 = 5.0f;
vec4 = (float4)5.0f;
vec4 = (float4)5;
vec4 = (float4)vec4_3;
ivec4 = (int4)5.0f;
ivec4 = (int4)5;
ivec4 = (int4)vec4_3;
i = (int)ivec4; // expected-error {{invalid conversion between vector type 'int4' and integer type 'int' of different size}}
i = ivec4; // expected-error {{assigning to 'int' from incompatible type 'int4'}}
ivec4 = (int4)ptr; // expected-error {{invalid conversion between vector type 'int4' and scalar type 'int *'}}
vec4 = (float4)vec2; // expected-error {{invalid conversion between ext-vector type 'float4' and 'float2'}}
ish8 += 5; // expected-error {{can't convert between vector values of different size ('short8' and 'int')}}
ish8 += (short)5;
ivec4 *= 5;
vec4 /= 5.2f;
vec4 %= 4; // expected-error {{invalid operands to binary expression ('float4' and 'int')}}
ivec4 %= 4;
ivec4 += vec4; // expected-error {{can't convert between vector values of different size ('float4' and 'int4')}}
ivec4 += (int4)vec4;
ivec4 -= ivec4;
ivec4 |= ivec4;
ivec4 += ptr; // expected-error {{can't convert between vector values of different size ('int4' and 'int *')}}
}