gcc/testsuite/gcc.dg/20020312-2.c

   1 /* PR 5878.
   2
   3    We ICEd in verify_local_live_at_start because we incorrectly forced
   4    the PIC register live between BAR and BAZ.  We did this because the
   5    definition of PIC_OFFSET_TABLE_REGNUM was incorrectly not INVALID_REGNUM
   6    when !flag_pic for most targets.  */
   7
   8 /* { dg-do run } */
   9 /* { dg-options "-O -fno-pic" } */
  10
  11 extern void abort (void);
  12
  13 #if defined(__alpha__)
  14 /* PIC register is $29, but is used even without -fpic.  */
  15 #elif defined(__arc__)
  16 # define PIC_REG  "26"
  17 #elif defined(__arm__)
  18 # define PIC_REG  "9"
  19 #elif defined(AVR)
  20 /* No pic register.  */
  21 #elif defined(__cris__)
  22 # define PIC_REG  "0"
  23 #elif defined(__fr30__)
  24 /* No pic register.  */
  25 #elif defined(__H8300__) || defined(__H8300H__) || defined(__H8300S__)
  26 /* No pic register.  */
  27 #elif defined(_IBMR2)
  28 /* No pic register.  */
  29 #elif defined(__i386__)
  30 # define PIC_REG  "ebx"
  31 #elif defined(__ia64__)
  32 /* PIC register is r1, but is used even without -fpic.  */
  33 #elif defined(__M32R__)
  34 /* No pic register.  */
  35 #elif defined(__m68k__)
  36 # define PIC_REG  "a5"
  37 #elif defined(__mc68hc1x__)
  38 /* No pic register.  */
  39 #elif defined(__mcore__)
  40 /* No pic register.  */
  41 #elif defined(__mips__)
  42 /* PIC register is $28, but is used even without -fpic.  */
  43 #elif defined(__MMIX__)
  44 /* No pic register.  */
  45 #elif defined(__mn10300__)
  46 /* No pic register.  */
  47 #elif defined(__hppa__)
  48 /* PIC register is %r27 or %r19, but is used even without -fpic.  */
  49 #elif defined(__pdp11__)
  50 /* No pic register.  */
  51 #elif defined(__powerpc__) || defined(__PPC__) || defined(__POWERPC__)
  52 # ifdef __MACH__
  53 #  define PIC_REG  "31"
  54 # else
  55 #  define PIC_REG  "30"
  56 # endif
  57 #elif defined(__s390__)
  58 # define PIC_REG  "12"
  59 #elif defined(__sparc__)
  60 # define PIC_REG  "l7"
  61 #elif defined(__v850)
  62 /* No pic register.  */
  63 #elif defined(__vax__)
  64 /* No pic register.  */
  65 #elif defined(__xstormy16__)
  66 /* No pic register.  */
  67 #elif defined(__XTENSA__)
  68 /* No pic register.  */
  69 #elif defined(__sh__)
  70 # define PIC_REG  "r12"
  71 #elif defined(__x86_64__)
  72 /* No pic register.  */
  73 #elif defined(__m32c__)
  74 /* No pic register.  */
  75 #else
  76 # error "Modify the test for your target."
  77 #endif
  78
  79 #if defined PIC_REG && !defined __PIC__ && !defined __pic__
  80 register void *reg __asm__(PIC_REG);
  81 #else
  82 /* We really need a global register variable set to the PIC register
  83    to expose the bug.  Oh well, let the test case not fail.  */
  84 static void *reg;
  85 #endif
  86
  87 void * __attribute__((noinline))
  88 dummy (void *x)
  89 {
  90   return x;
  91 }
  92
  93 void
  94 f (void)
  95 {
  96   goto *dummy (&&bar);
  97   for (;;)
  98     {
  99     foo:
 100       reg = (void *) 1;
 101       if (!reg)
 102         goto baz;
 103       reg = &&foo;
 104     }
 105
 106  bar:
 107  baz:
 108   reg = 0;
 109 }
 110
 111 int
 112 main()
 113 {
 114   void *old_reg = reg;
 115   reg = (void *) 1;
 116
 117   f ();
 118
 119   /* Additionally test that the prologue/epilogue properly does *not*
 120      save and restore global registers.  Not possible when the PIC
 121      register is in a register window, of course.  On Darwin, you can't
 122      call library routines from non-PIC code.  */
 123 #if !defined (__sparc__) && !defined(__MACH__)
 124   if (reg)
 125     abort ();
 126 #endif
 127
 128   reg = old_reg;
 129   return 0;
 130 }