gcc/testsuite/c-c++-common/sizeof-array-argument.c

   1 /* PR c/6940 */
   2 /* { dg-do compile } */
   3
   4 /* Test -Wsizeof-array-argument warning.  */
   5
   6 typedef int T[2][2];
   7
   8 int
   9 fn1 (int a[])
  10 {
  11   return sizeof a; /* { dg-warning "on array function parameter" } */
  12 }
  13
  14 int
  15 fn2 (int x, int b[3])
  16 {
  17   return x + sizeof b; /* { dg-warning "on array function parameter" } */
  18 }
  19
  20 int
  21 fn3 (int *p)
  22 {
  23   return sizeof p;
  24 }
  25
  26 int fn4 (int *p);
  27 int
  28 fn4 (int p[])
  29 {
  30   return sizeof p; /* { dg-warning "on array function parameter" } */
  31 }
  32
  33 int fn5 (int x[]);
  34 int
  35 fn5 (int *x)
  36 {
  37   return sizeof x;
  38 }
  39
  40 #ifndef __cplusplus
  41 /* C++ doesn't know VLA unspec.  */
  42 int fn6 (int x[*]);
  43 int
  44 fn6 (int x[])
  45 {
  46   return sizeof x; /* { dg-warning "on array function parameter" "" { target c } } */
  47 }
  48 #endif
  49
  50 int
  51 fn7 (int x[][2])
  52 {
  53   return sizeof x; /* { dg-warning "on array function parameter" } */
  54 }
  55
  56 int
  57 fn8 (char *x[])
  58 {
  59   return sizeof x; /* { dg-warning "on array function parameter" } */
  60 }
  61
  62 int
  63 fn9 (char **x)
  64 {
  65   return sizeof x;
  66 }
  67
  68 #ifndef __cplusplus
  69 int
  70 fn10 (int a, char x[static sizeof a])
  71 {
  72   return sizeof x; /* { dg-warning "on array function parameter" "" { target c } } */
  73 }
  74
  75 int
  76 fn11 (a)
  77   char a[];
  78 {
  79   return sizeof a; /* { dg-warning "on array function parameter" "" { target c } } */
  80 }
  81
  82 int
  83 fn12 (a)
  84   char *a;
  85 {
  86   return sizeof a;
  87 }
  88 #endif
  89
  90 int
  91 fn13 (char (*x)[2])
  92 {
  93   return sizeof x;
  94 }
  95
  96 int
  97 fn14 (T t)
  98 {
  99   return sizeof t; /* { dg-warning "on array function parameter" } */
 100 }