gcc/testsuite/gcc.dg/pr41340.c

   1 /* PR debug/41340 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O3 -g -fcompare-debug" } */
   4 /* { dg-options "-O3 -g -fcompare-debug -march=i686" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   5 /* { dg-skip-if "no long pointers" {  { ! ilp32 } && { ! lp64 } } } */
   6
   7 typedef struct { int t; } *T;
   8 struct S1 { unsigned s1; };
   9 struct S2 { struct S1 s2; };
  10 struct S3 { unsigned s3; struct S2 **s4; };
  11 struct S5 { struct S2 *s5; };
  12
  13 __extension__ typedef __INTPTR_TYPE__ ssize_t;
  14
  15 extern void fn0 (void) __attribute__ ((__noreturn__));
  16 T fn6 (struct S3);
  17 void fn7 (void);
  18
  19 static inline __attribute__((always_inline)) int
  20 fn1 (const struct S1 *x)
  21 {
  22   return x->s1;
  23 }
  24
  25 static inline __attribute__((always_inline)) int
  26 fn2 (const struct S1 *x, unsigned y)
  27 {
  28   if (y >= x->s1)
  29     fn0 ();
  30   return 0;
  31 }
  32
  33 static inline __attribute__((always_inline)) int
  34 fn3 (struct S3 x)
  35 {
  36   return (x.s3 == fn1 (*x.s4 ? &(*x.s4)->s2 : 0));
  37 }
  38
  39 static inline __attribute__((always_inline)) int
  40 fn4 (struct S3 x)
  41 {
  42   return fn2 (&(*x.s4)->s2, x.s3);
  43 }
  44
  45 int
  46 fn5 (struct S3 x, T *y)
  47 {
  48   if (!fn3 (x))
  49     {
  50       *y = (T) (ssize_t) fn4 (x);
  51       return 1;
  52     }
  53   return 0;
  54 }
  55
  56 void
  57 test (struct S5 *x)
  58 {
  59   struct S3 a;
  60   T b;
  61   unsigned char c = 0;
  62   a.s4 = &x->s5;
  63   while (fn5 (a, &b))
  64     if (!(b->t & 8))
  65       c = 1;
  66   a.s4 = &x->s5;
  67   while ((b = fn6 (a)))
  68     ;
  69   if (!c)
  70     fn7 ();
  71 }