gcc/testsuite/c-c++-common/Wmisleading-indentation-3.c

   1 /* Verify -Wmisleading-indentation with source-printing.
   2    This is a subset of Wmisleading-indentation.c.  */
   3
   4 /* { dg-options "-Wmisleading-indentation -fdiagnostics-show-caret" } */
   5 /* { dg-do compile } */
   6
   7 extern int foo (int);
   8 extern int bar (int, int);
   9 extern int flagA;
  10 extern int flagB;
  11 extern int flagC;
  12 extern int flagD;
  13
  14 void
  15 fn_5 (double *a, double *b, double *sum, double *prod)
  16 {
  17   int i = 0;
  18   for (i = 0; i < 10; i++) /* { dg-warning "3: this 'for' clause does not guard..." } */
  19     sum[i] = a[i] * b[i];
  20     prod[i] = a[i] * b[i]; /* { dg-message "5: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'" } */
  21 /* { dg-begin-multiline-output "" }
  22    for (i = 0; i < 10; i++)
  23    ^~~
  24    { dg-end-multiline-output "" } */
  25 /* { dg-begin-multiline-output "" }
  26      prod[i] = a[i] * b[i];
  27      ^~~~
  28    { dg-end-multiline-output "" } */
  29 }
  30
  31 /* Based on CVE-2014-1266 aka "goto fail" */
  32 int fn_6 (int a, int b, int c)
  33 {
  34         int err;
  35
  36         /* ... */
  37         if ((err = foo (a)) != 0)
  38                 goto fail;
  39         if ((err = foo (b)) != 0) /* { dg-message "2: this 'if' clause does not guard..." } */
  40                 goto fail;
  41                 goto fail; /* { dg-message "3: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'" } */
  42         if ((err = foo (c)) != 0)
  43                 goto fail;
  44         /* ... */
  45
  46 /* { dg-begin-multiline-output "" }
  47   if ((err = foo (b)) != 0)
  48   ^~
  49    { dg-end-multiline-output "" } */
  50 /* { dg-begin-multiline-output "" }
  51    goto fail;
  52    ^~~~
  53    { dg-end-multiline-output "" } */
  54
  55 fail:
  56         return err;
  57 }
  58
  59 #define FOR_EACH(VAR, START, STOP) \
  60   for ((VAR) = (START); (VAR) < (STOP); (VAR++)) /* { dg-warning "3: this 'for' clause does not guard..." } */
  61
  62 void fn_14 (void)
  63 {
  64   int i;
  65   FOR_EACH (i, 0, 10) /* { dg-message "in expansion of macro .FOR_EACH." } */
  66     foo (i);
  67     bar (i, i); /* { dg-message "5: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'" } */
  68
  69 /* { dg-begin-multiline-output "" }
  70    for ((VAR) = (START); (VAR) < (STOP); (VAR++))
  71    ^
  72    { dg-end-multiline-output "" } */
  73 /* { dg-begin-multiline-output "" }
  74    FOR_EACH (i, 0, 10)
  75    ^~~~~~~~
  76    { dg-end-multiline-output "" } */
  77 /* { dg-begin-multiline-output "" }
  78      bar (i, i);
  79      ^~~
  80    { dg-end-multiline-output "" } */
  81 }
  82 #undef FOR_EACH