gcc/testsuite/gcc.dg/torture/pr106590.c

   1 /* PR rtl-optimization/106590 } */
   2 /* { dg-do run } */
   3 /* { dg-additional-options "-mtune=skylake" { target { i?86-*-* x86_64-*-* } } } */
   4
   5 typedef struct A { short a; } A;
   6 typedef A *B;
   7 typedef struct C { int c, d; } C;
   8 typedef C *D;
   9
  10 B
  11 foo (void)
  12 {
  13   static A r = { .a = 1 };
  14   return &r;
  15 }
  16
  17 D
  18 bar (void)
  19 {
  20   static C r = { .c = 1, .d = 23 };
  21   return &r;
  22 }
  23
  24 static inline int __attribute__((always_inline))
  25 baz (short a)
  26 {
  27   int e = 1, f;
  28   short g;
  29   D h;
  30
  31   switch (a)
  32     {
  33     case 1:
  34       f = 23;
  35       g = 1;
  36       break;
  37     case 2:
  38       f = 20;
  39       g = 2;
  40       break;
  41     }
  42
  43   h = bar ();
  44
  45   if (h->d != f || h->c != g)
  46     __builtin_abort ();
  47   return e;
  48 }
  49
  50 int
  51 qux (void)
  52 {
  53   B i = foo ();
  54   int e = 1;
  55
  56   switch (i->a)
  57     {
  58     case 1:
  59     case 2:
  60       e = baz (i->a);
  61       break;
  62     case 3:
  63       e = 0;
  64       break;
  65     }
  66
  67   return e;
  68 }
  69
  70 int
  71 main ()
  72 {
  73   qux ();
  74   return 0;
  75 }