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(__lm32__)
  34 /* No pic register.  */
  35 #elif defined(__M32R__)
  36 /* No pic register.  */
  37 #elif defined(__m68k__)
  38 # define PIC_REG  "a5"
  39 #elif defined(__mc68hc1x__)
  40 /* No pic register.  */
  41 #elif defined(__mcore__)
  42 /* No pic register.  */
  43 #elif defined(__mips__)
  44 /* PIC register is $28, but is used even without -fpic.  */
  45 #elif defined(__MMIX__)
  46 /* No pic register.  */
  47 #elif defined(__mn10300__)
  48 /* No pic register.  */
  49 #elif defined(__moxie__)
  50 /* No pic register.  */
  51 #elif defined(__hppa__)
  52 /* PIC register is %r27 or %r19, but is used even without -fpic.  */
  53 #elif defined(__pdp11__)
  54 /* No pic register.  */
  55 #elif defined(__powerpc__) || defined(__PPC__) || defined(__POWERPC__) || defined (__ppc)
  56 # ifdef __MACH__
  57 #  define PIC_REG  "31"
  58 # else
  59 #  define PIC_REG  "30"
  60 # endif
  61 #elif defined(__s390__)
  62 # define PIC_REG  "12"
  63 #elif defined(__sparc__)
  64 # define PIC_REG  "l7"
  65 #elif defined(__v850)
  66 /* No pic register.  */
  67 #elif defined(__vax__)
  68 /* No pic register.  */
  69 #elif defined(__xstormy16__)
  70 /* No pic register.  */
  71 #elif defined(__XTENSA__)
  72 /* No pic register.  */
  73 #elif defined(__sh__)
  74 # define PIC_REG  "r12"
  75 #elif defined(__x86_64__)
  76 /* No pic register.  */
  77 #elif defined(__m32c__)
  78 /* No pic register.  */
  79 #elif defined(__SPU__)
  80 #  define PIC_REG  "126"
  81 #elif defined (__frv__)
  82 # ifdef __FRV_FDPIC__
  83 #  define PIC_REG "gr15"
  84 # else
  85 #  define PIC_REG "gr17"
  86 #endif
  87 #else
  88 # error "Modify the test for your target."
  89 #endif
  90
  91 #if defined PIC_REG && !defined __PIC__ && !defined __pic__
  92 register void *reg __asm__(PIC_REG);
  93 #else
  94 /* We really need a global register variable set to the PIC register
  95    to expose the bug.  Oh well, let the test case not fail.  */
  96 static void *reg;
  97 #endif
  98
  99 void * __attribute__((noinline))
 100 dummy (void *x)
 101 {
 102   return x;
 103 }
 104
 105 void
 106 f (void)
 107 {
 108   goto *dummy (&&bar);
 109   for (;;)
 110     {
 111     foo:
 112       reg = (void *) 1;
 113       if (!reg)
 114         goto baz;
 115       reg = &&foo;
 116     }
 117
 118  bar:
 119  baz:
 120   reg = 0;
 121 }
 122
 123 int
 124 main()
 125 {
 126   void *old_reg = reg;
 127   reg = (void *) 1;
 128
 129   f ();
 130
 131   /* Additionally test that the prologue/epilogue properly does *not*
 132      save and restore global registers.  Not possible when the PIC
 133      register is in a register window, of course.  On Darwin, you can't
 134      call library routines from non-PIC code.  */
 135 #if !defined (__sparc__) && !defined(__MACH__)
 136   if (reg)
 137     abort ();
 138 #endif
 139
 140   reg = old_reg;
 141   return 0;
 142 }