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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [gcc.dg/] [attr-warn-unused-result.c] - Rev 716
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/* warn_unused_result attribute tests. */ /* { dg-do compile } */ /* { dg-options "-O" } */ #define WUR __attribute__((warn_unused_result)) #define WURAI __attribute__((warn_unused_result, always_inline)) inline typedef WUR int (*fnt) (void); typedef struct { long i; } A; typedef struct { long i; long j; } B; typedef struct { char big[1024]; fnt fn; } C; WUR int check1 (void); WUR void check2 (void); /* { dg-warning "attribute ignored" } */ int foo WUR; /* { dg-warning "only applies" } */ int bar (void); extern WURAI int check3 (void) { return bar (); } WUR A check4 (void); WUR B check5 (void); WUR C check6 (void); A bar7 (void); B bar8 (void); C bar9 (void); extern WURAI A check7 (void) { return bar7 (); } extern WURAI B check8 (void) { return bar8 (); } extern WURAI C check9 (void) { return bar9 (); } /* This is useful for checking whether return value of statement expressions (returning int in this case) is used. */ extern WURAI int check_int_result (int res) { return res; } #define GU(v) ({ int e = 0; (v) = bar (); if ((v) < 23) e = 14; e; }) fnt fnptr; WUR int check10 (void); int baz (void); extern WURAI int check11 (void) { return baz (); } int k; void test (void) { int i = 0, j; const fnt pcheck1 = check1; const fnt pcheck3 = check3; A a; B b; C c; if (check1 ()) return; i += check1 (); i += ({ check1 (); }); check1 (); /* { dg-warning "ignoring return value of" } */ (void) check1 (); /* { dg-warning "ignoring return value of" } */ check1 (), bar (); /* { dg-warning "ignoring return value of" } */ check2 (); (void) check2 (); check2 (), bar (); if (check3 ()) return; i += check3 (); i += ({ check3 (); }); check3 (); /* { dg-warning "ignoring return value of" } */ (void) check3 (); /* { dg-warning "ignoring return value of" } */ check3 (), bar (); /* { dg-warning "ignoring return value of" } */ a = check4 (); if (a.i) return; if (check4 ().i) return; if (({ check4 (); }).i) return; check4 (); /* { dg-warning "ignoring return value of" } */ (void) check4 (); /* { dg-warning "ignoring return value of" } */ check4 (), bar (); /* { dg-warning "ignoring return value of" } */ b = check5 (); if (b.i + b.j) return; if (check5 ().j) return; if (({ check5 (); }).j) return; check5 (); /* { dg-warning "ignoring return value of" } */ (void) check5 (); /* { dg-warning "ignoring return value of" } */ check5 (), bar (); /* { dg-warning "ignoring return value of" } */ c = check6 (); if (c.big[12] + c.big[29]) return; if (check6 ().big[27]) return; if (({ check6 (); }).big[0]) return; check6 (); /* { dg-warning "ignoring return value of" } */ (void) check6 (); /* { dg-warning "ignoring return value of" } */ check6 (), bar (); /* { dg-warning "ignoring return value of" } */ a = check7 (); if (a.i) return; if (check7 ().i) return; if (({ check7 (); }).i) return; check7 (); /* { dg-warning "ignoring return value of" } */ (void) check7 (); /* { dg-warning "ignoring return value of" } */ check7 (), bar (); /* { dg-warning "ignoring return value of" } */ b = check8 (); if (b.i + b.j) return; if (check8 ().j) return; if (({ check8 (); }).j) return; check8 (); /* { dg-warning "ignoring return value of" } */ (void) check8 (); /* { dg-warning "ignoring return value of" } */ check8 (), bar (); /* { dg-warning "ignoring return value of" } */ c = check9 (); if (c.big[12] + c.big[29]) return; if (check9 ().big[27]) return; if (({ check9 (); }).big[0]) return; check9 (); /* { dg-warning "ignoring return value of" } */ (void) check9 (); /* { dg-warning "ignoring return value of" } */ check9 (), bar (); /* { dg-warning "ignoring return value of" } */ if (check_int_result (GU (j))) return; i += check_int_result (GU (j)); i += ({ check_int_result (GU (j)); }); check_int_result (GU (j)); /* { dg-warning "ignoring return value of" } */ (void) check_int_result (GU (j)); /* { dg-warning "ignoring return value of" } */ check_int_result (GU (j)), bar (); /* { dg-warning "ignoring return value of" } */ if (fnptr ()) return; i += fnptr (); i += ({ fnptr (); }); fnptr (); /* { dg-warning "ignoring return value of" } */ (void) fnptr (); /* { dg-warning "ignoring return value of" } */ fnptr (), bar (); /* { dg-warning "ignoring return value of" } */ fnptr = check1; if (fnptr ()) return; i += fnptr (); i += ({ fnptr (); }); fnptr (); /* { dg-warning "ignoring return value of" } */ (void) fnptr (); /* { dg-warning "ignoring return value of" } */ fnptr (), bar (); /* { dg-warning "ignoring return value of" } */ fnptr = check3; if (fnptr ()) return; i += fnptr (); i += ({ fnptr (); }); fnptr (); /* { dg-warning "ignoring return value of" } */ (void) fnptr (); /* { dg-warning "ignoring return value of" } */ fnptr (), bar (); /* { dg-warning "ignoring return value of" } */ if (bar9 ().fn ()) return; i += bar9 ().fn (); i += ({ bar9 ().fn (); }); bar9 ().fn (); /* { dg-warning "ignoring return value of" } */ (void) bar9 ().fn (); /* { dg-warning "ignoring return value of" } */ bar9 ().fn (), bar (); /* { dg-warning "ignoring return value of" } */ if ((k ? check1 : check10) ()) return; i += (k ? check1 : check10) (); i += ({ (k ? check1 : check10) (); }); (k ? check1 : check10) (); /* { dg-warning "ignoring return value of" } */ (void) (k ? check1 : check10) (); /* { dg-warning "ignoring return value of" } */ (k ? check1 : check10) (), bar (); /* { dg-warning "ignoring return value of" } */ if ((k ? check3 : check11) ()) return; i += (k ? check3 : check11) (); i += ({ (k ? check3 : check11) (); }); (k ? check3 : check11) (); /* { dg-warning "ignoring return value of" } */ (void) (k ? check3 : check11) (); /* { dg-warning "ignoring return value of" } */ (k ? check3 : check11) (), bar (); /* { dg-warning "ignoring return value of" } */ if (pcheck1 ()) return; i += pcheck1 (); i += ({ pcheck1 (); }); pcheck1 (); /* { dg-warning "ignoring return value of" } */ (void) pcheck1 (); /* { dg-warning "ignoring return value of" } */ pcheck1 (), bar (); /* { dg-warning "ignoring return value of" } */ if (pcheck3 ()) return; i += pcheck3 (); i += ({ pcheck3 (); }); pcheck3 (); /* { dg-warning "ignoring return value of" } */ (void) pcheck3 (); /* { dg-warning "ignoring return value of" } */ pcheck3 (), bar (); /* { dg-warning "ignoring return value of" } */ }
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