1 /* { dg-options "-fnon-call-exceptions" } */
2 /* With -fnon-call-exceptions 0 / 0 should not be eliminated. */
3
4 #ifdef SIGNAL_SUPPRESS
5 # define DO_TEST 0
6 #elif defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) || defined (__POWERPC__) || defined (__ppc)
7 /* On PPC division by zero does not trap. */
8 # define DO_TEST 0
9 #elif defined (__SPU__)
10 /* On SPU division by zero does not trap. */
11 # define DO_TEST 0
12 #elif defined (__sh__)
13 /* On SH division by zero does not trap. */
14 # define DO_TEST 0
15 #elif defined (__v850__)
16 /* On V850 division by zero does not trap. */
17 # define DO_TEST 0
18 #elif defined (__MSP430__)
19 /* On MSP430 division by zero does not trap. */
20 # define DO_TEST 0
21 #elif defined (__RL78__)
22 /* On RL78 division by zero does not trap. */
23 # define DO_TEST 0
24 #elif defined (__RX__)
25 /* On RX division by zero does not trap. */
26 # define DO_TEST 0
27 #elif defined (__aarch64__)
28 /* On AArch64 integer division by zero does not trap. */
29 # define DO_TEST 0
30 #elif defined (__TMS320C6X__)
31 /* On TI C6X division by zero does not trap. */
32 # define DO_TEST 0
33 #elif defined (__VISIUM__)
34 /* On Visium division by zero does not trap. */
35 # define DO_TEST 0
36 #elif defined (__mips__) && !defined(__linux__)
37 /* MIPS divisions do trap by default, but libgloss targets do not
38 intercept the trap and raise a SIGFPE. The same is probably
39 true of other bare-metal environments, so restrict the test to
40 systems that use the Linux kernel. */
41 # define DO_TEST 0
42 #elif defined (__mips16) && defined(__linux__)
43 /* Not all Linux kernels deal correctly the breakpoints generated by
44 MIPS16 divisions by zero. They show up as a SIGTRAP instead. */
45 # define DO_TEST 0
46 #elif defined (__MICROBLAZE__)
47 /* We cannot rely on division by zero generating a trap. */
48 # define DO_TEST 0
49 #elif defined (__epiphany__)
50 /* Epiphany does not have hardware division, and the software implementation
51 has truly undefined behavior for division by 0. */
52 # define DO_TEST 0
53 #elif defined (__m68k__) && !defined(__linux__)
54 /* Attempting to trap division-by-zero in this way isn't likely to work on
55 bare-metal m68k systems. */
56 # define DO_TEST 0
57 #elif defined (__CRIS__)
58 /* No SIGFPE for CRIS integer division. */
59 # define DO_TEST 0
60 #elif defined (__MMIX__)
61 /* By default we emit a sequence with DIVU, which "never signals an
62 exceptional condition, even when dividing by zero". */
63 # define DO_TEST 0
64 #elif defined (__arc__)
65 /* No SIGFPE for ARC integer division. */
66 # define DO_TEST 0
67 #elif defined (__arm__) && defined (__ARM_EABI__)
68 # ifdef __ARM_ARCH_EXT_IDIV__
69 /* Hardware division instructions may not trap, and handle trapping
70 differently anyway. Skip the test if we have those instructions. */
71 # define DO_TEST 0
72 # else
73 # include <signal.h>
74 /* ARM division-by-zero behavior is to call a helper function, which
75 can do several different things, depending on requirements. Emulate
76 the behavior of other targets here by raising SIGFPE. */
77 int __attribute__((used))
__aeabi_idiv0(int return_value)78 __aeabi_idiv0 (int return_value)
79 {
80 raise (SIGFPE);
81 return return_value;
82 }
83 # define DO_TEST 1
84 # endif
85 #elif defined (__nios2__)
86 /* Nios II requires both hardware support and user configuration to
87 raise an exception on divide by zero. */
88 # define DO_TEST 0
89 #elif defined (__nvptx__)
90 /* There isn't even a signal function. */
91 # define DO_TEST 0
92 #else
93 # define DO_TEST 1
94 #endif
95
96 extern void abort (void);
97 extern void exit (int);
98
99 #if DO_TEST
100
101 #include <signal.h>
102
103 void
sigfpe(int signum)104 sigfpe (int signum __attribute__ ((unused)))
105 {
106 exit (0);
107 }
108
109 #endif
110
111 /* When optimizing, the compiler is smart enough to constant fold the
112 static unset variables i and j to produce 0 / 0, but it can't
113 eliminate the assignment to the global k. */
114 static int i;
115 static int j;
116 int k __attribute__ ((used));
117
118 int
main()119 main ()
120 {
121 #if DO_TEST
122 signal (SIGFPE, sigfpe);
123 k = i / j;
124 abort ();
125 #else
126 exit (0);
127 #endif
128 }
129