gcc/testsuite/gcc.dg/tree-ssa/pr81741.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -w -fdump-tree-dom2-details" } */
   3
   4 #include <string.h>
   5
   6 typedef struct string_s {
   7   unsigned long size, alloc;
   8   char *ptr;
   9 } string_t[1];
  10
  11 # define M_ASSUME(x)                                    \
  12   (! __builtin_constant_p (!!(x) || !(x)) || (x) ?      \
  13    (void) 0 : __builtin_unreachable())
  14
  15 int f(string_t s)
  16 {
  17   M_ASSUME(strlen(s->ptr) == s->size);
  18   return s->size;
  19 }
  20
  21 /* { dg-final { scan-assembler-not "strlen" } } */
  22