gcc/testsuite/gcc.dg/strlenopt-47.c

   1 /* PR tree-optimization/86400 - set<string>::set<char (*)[2]) constructor
   2    does not work with array argument
   3    Verify that strlen() calls with two-character array elements of
   4    multidimensional arrays whose higher order dimension is 1 are not
   5    folded.
   6    { dg-do compile }
   7    { dg-options "-O2 -Wall -fdump-tree-optimized" } */
   8
   9 #include "strlenopt.h"
  10
  11 void f (void)
  12 {
  13   extern char a[1][2];
  14   int n = strlen (*a);
  15   if (n != 1)
  16     abort();
  17 }
  18
  19 void g (void)
  20 {
  21   extern char b[1][2];
  22   int n = strlen (b[0]);
  23   if (n != 1)
  24     abort();
  25 }
  26
  27 void h (void)
  28 {
  29   extern char c[1][2];
  30   int n = strlen (&c[0][0]);
  31   if (n != 1)
  32     abort();
  33 }
  34
  35 /* { dg-final { scan-tree-dump-times "= strlen" 3 "optimized" } }
  36    { dg-final { scan-tree-dump-times "abort" 3 "optimized" } } */