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      1 // RUN: %clang_cc1 -Wconversion -Wliteral-conversion -fsyntax-only -verify %s
      2 
      3 // C DR #316, PR 3626.
      4 void f0(a, b, c, d) int a,b,c,d; {}
      5 void t0(void) {
      6   f0(1);  // expected-warning{{too few arguments}}
      7 }
      8 
      9 void f1(a, b) int a, b; {}
     10 void t1(void) {
     11   f1(1, 2, 3); // expected-warning{{too many arguments}}
     12 }
     13 
     14 void f2(float); // expected-note{{previous declaration is here}}
     15 void f2(x) float x; { } // expected-warning{{promoted type 'double' of K&R function parameter is not compatible with the parameter type 'float' declared in a previous prototype}}
     16 
     17 typedef void (*f3)(void);
     18 f3 t3(int b) { return b? f0 : f1; } // okay
     19 
     20 // <rdar://problem/8193107>
     21 void f4() {
     22     char *rindex();
     23 }
     24 
     25 char *rindex(s, c)
     26      register char *s, c; // expected-warning{{promoted type 'char *' of K&R function parameter is not compatible with the parameter type 'const char *' declared in a previous prototype}}
     27 {
     28   return 0;
     29 }
     30 
     31 // PR8314
     32 void proto(int);
     33 void proto(x)
     34      int x;
     35 {
     36 }
     37 
     38 void use_proto() {
     39   proto(42.1); // expected-warning{{implicit conversion turns literal floating-point number into integer}}
     40   (&proto)(42.1); // expected-warning{{implicit conversion turns literal floating-point number into integer}}
     41 }
     42