129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
/* { dg-options "-fnon-call-exceptions" } */
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/* With -fnon-call-exceptions 0 / 0 should not be eliminated. */
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#ifdef SIGNAL_SUPPRESS
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# define DO_TEST 0
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#elif defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) || defined (__POWERPC__) || defined (__ppc)
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/* On PPC division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__SPU__)
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/* On SPU division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__sh__)
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/* On SH division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__v850__)
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/* On V850 division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__MSP430__)
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/* On MSP430 division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__RL78__)
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/* On RL78 division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__RX__)
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/* On RX division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__aarch64__)
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/* On AArch64 integer division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__TMS320C6X__)
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/* On TI C6X division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__VISIUM__)
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/* On Visium division by zero does not trap. */
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# define DO_TEST 0
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#elif defined (__mips__) && !defined(__linux__)
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/* MIPS divisions do trap by default, but libgloss targets do not
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intercept the trap and raise a SIGFPE. The same is probably
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true of other bare-metal environments, so restrict the test to
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systems that use the Linux kernel. */
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# define DO_TEST 0
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#elif defined (__mips16) && defined(__linux__)
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/* Not all Linux kernels deal correctly the breakpoints generated by
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MIPS16 divisions by zero. They show up as a SIGTRAP instead. */
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# define DO_TEST 0
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#elif defined (__MICROBLAZE__)
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/* We cannot rely on division by zero generating a trap. */
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# define DO_TEST 0
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#elif defined (__epiphany__)
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/* Epiphany does not have hardware division, and the software implementation
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has truly undefined behavior for division by 0. */
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# define DO_TEST 0
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#elif defined (__m68k__) && !defined(__linux__)
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/* Attempting to trap division-by-zero in this way isn't likely to work on
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bare-metal m68k systems. */
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# define DO_TEST 0
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#elif defined (__CRIS__)
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/* No SIGFPE for CRIS integer division. */
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# define DO_TEST 0
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#elif defined (__MMIX__)
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/* By default we emit a sequence with DIVU, which "never signals an
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exceptional condition, even when dividing by zero". */
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# define DO_TEST 0
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#elif defined (__arc__)
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/* No SIGFPE for ARC integer division. */
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# define DO_TEST 0
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#elif defined (__arm__) && defined (__ARM_EABI__)
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# ifdef __ARM_ARCH_EXT_IDIV__
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/* Hardware division instructions may not trap, and handle trapping
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differently anyway. Skip the test if we have those instructions. */
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# define DO_TEST 0
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# else
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# include <signal.h>
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/* ARM division-by-zero behavior is to call a helper function, which
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can do several different things, depending on requirements. Emulate
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the behavior of other targets here by raising SIGFPE. */
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int __attribute__((used))
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__aeabi_idiv0 (int return_value)
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{
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raise (SIGFPE);
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return return_value;
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}
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# define DO_TEST 1
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# endif
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#elif defined (__nios2__)
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/* Nios II requires both hardware support and user configuration to
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raise an exception on divide by zero. */
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# define DO_TEST 0
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#elif defined (__nvptx__)
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/* There isn't even a signal function. */
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# define DO_TEST 0
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#else
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# define DO_TEST 1
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#endif
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extern void abort (void);
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extern void exit (int);
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#if DO_TEST
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#include <signal.h>
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void
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sigfpe (int signum __attribute__ ((unused)))
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{
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exit (0);
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}
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#endif
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/* When optimizing, the compiler is smart enough to constant fold the
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static unset variables i and j to produce 0 / 0, but it can't
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eliminate the assignment to the global k. */
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static int i;
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static int j;
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int k __attribute__ ((used));
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int
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main ()
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{
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#if DO_TEST
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signal (SIGFPE, sigfpe);
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k = i / j;
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abort ();
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#else
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exit (0);
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#endif
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}
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