clang/test/Sema/merge-decls.c

   1 // RUN: %clang_cc1 %s -verify -fsyntax-only -Wno-strict-prototypes
   2
   3 void foo(void);
   4 void foo(void) {}
   5 void foo(void);
   6 void foo(void); // expected-note {{previous declaration is here}}
   7
   8 void foo(int); // expected-error {{conflicting types for 'foo'}}
   9
  10 int funcdef()
  11 {
  12  return 0;
  13 }
  14
  15 int funcdef();
  16
  17 int funcdef2() { return 0; } // expected-note {{previous definition is here}}
  18 int funcdef2() { return 0; } // expected-error {{redefinition of 'funcdef2'}}
  19
  20 // PR2502
  21 void (*f)(void);
  22 void (*f)() = 0;
  23
  24 typedef __attribute__(( ext_vector_type(2) )) int Vi2;
  25 typedef __attribute__(( ext_vector_type(2) )) float Vf2;
  26
  27 Vf2 g0; // expected-note {{previous definition is here}}
  28 Vi2 g0; // expected-error {{redefinition of 'g0'}}
  29
  30 _Complex int g1; // expected-note {{previous definition is here}}
  31 _Complex float g1; // expected-error {{redefinition of 'g1'}}
  32
  33 extern char i6096412[10];
  34 extern char i6096412[];
  35 void foo6096412(void) {
  36   int x = sizeof(i6096412);
  37 }
  38
  39
  40 typedef int test1_IA[];
  41 typedef int test1_A10[10];
  42 static test1_A10 *test1_f(void);
  43 void test1_g(void)
  44 {
  45   {
  46     extern test1_IA  *test1_f(void);
  47   }
  48   (void)sizeof(*test1_f());
  49 }
  50
  51 typedef int test2_IA[];
  52 typedef int test2_A10[10];
  53
  54 static test2_A10 *test2_f(void);
  55 static test2_IA  *test2_f(void);
  56
  57 void test2_g(void)
  58 {
  59   (void)sizeof(*test2_f());
  60 }
  61
  62 int (*test3_f())[10];
  63 int (*test3_f())[];
  64 int test3_k = sizeof(*test3_f());
  65
  66 void test4_f(int);
  67 void test4_f(a)
  68   char a;
  69 {
  70   int v[sizeof(a) == 1 ? 1 : -1];
  71 }
  72
  73 int test5_f(int (*)[10]);
  74 int test5_f(int (*x)[]) {
  75   return sizeof(*x); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
  76 }
  77
  78 void test6_f(int (*a)[11]);
  79 void test6_f(a)
  80    int (*a)[];
  81 {}
  82 void test6_g() {
  83   int arr[10];
  84   test6_f(&arr); // expected-warning {{incompatible pointer types passing 'int (*)[10]' to parameter of type 'int (*)[11]}}
  85 }
  86
  87 void test7_f(int (*)[10]);
  88 void test7_f(int (*)[]); // expected-note {{passing argument to parameter here}}
  89 void test7_g() {
  90   int x[5];
  91   test7_f(&x); // expected-warning {{incompatible pointer types passing 'int (*)[5]' to parameter of type 'int (*)[10]}}
  92 }
  93
  94 char d;
  95 char test8_gh62447[d.undef == 8]; // expected-error {{member reference base type 'char' is not a structure or union}}
  96 char test8_gh62447[d.undef == 4]; // expected-error {{member reference base type 'char' is not a structure or union}}