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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [gcc.dg/] [c1x-noreturn-2.c] - Rev 749
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/* Test C1X _Noreturn. Test valid code using stdnoreturn.h. */ /* { dg-do run } */ /* { dg-options "-std=c1x -pedantic-errors" } */ #include <stdnoreturn.h> extern int strcmp (const char *, const char *); noreturn void exit (int); noreturn void abort (void); noreturn int f1 (void); noreturn void f2 (void); static void noreturn f3 (void) { exit (0); } /* Returning from a noreturn function is undefined at runtime, not a constraint violation, but recommended practice is to diagnose if such a return appears possible. */ noreturn int f4 (void) { return 1; /* { dg-warning "has a 'return' statement" } */ /* { dg-warning "does return" "second warning" { target *-*-* } 25 } */ } noreturn void f5 (void) { return; /* { dg-warning "has a 'return' statement" } */ /* { dg-warning "does return" "second warning" { target *-*-* } 32 } */ } noreturn void f6 (void) { } /* { dg-warning "does return" } */ noreturn void f7 (int a) { if (a) exit (0); } /* { dg-warning "does return" } */ /* Declarations need not all have noreturn. */ void f2 (void); void f8 (void); noreturn void f8 (void); /* Duplicate noreturn is OK. */ noreturn noreturn void noreturn f9 (void); /* noreturn does not affect type compatibility. */ void (*fp) (void) = f5; #ifndef noreturn #error "noreturn not defined" #endif #define str(x) #x #define xstr(x) str(x) const char *s = xstr(noreturn); int main (void) { if (strcmp (s, "_Noreturn") != 0) abort (); exit (0); }
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