gcc/testsuite/gcc.dg/strlenopt-48.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 one-character array elements of
   4    multidimensional arrays are still folded.
   5    { dg-do compile }
   6    { dg-options "-O2 -Wall -fdump-tree-optimized" } */
   7
   8 #include "strlenopt.h"
   9
  10 void f (void)
  11 {
  12   extern char a[2][1];
  13   int n = strlen (a[1]);
  14   if (n >= sizeof a)
  15     abort();
  16 }
  17
  18 void g (void)
  19 {
  20   extern char b[3][2][1];
  21   int n = strlen (b[2][1]);
  22   if (n >= sizeof b)
  23     abort();
  24 }
  25
  26 void h (void)
  27 {
  28   extern char c[4][3][2][1];
  29   int n = strlen (c[3][2][1]);
  30   if (n >= sizeof c)
  31     abort();
  32 }
  33
  34 /* { dg-final { scan-tree-dump-times "strlen1" 0 "optimized" } }
  35    { dg-final { scan-tree-dump-times "abort" 0 "optimized" } } */