Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/pr25682.c @ 157:dafe684d005c
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:08:54 +0900 |
parents | 04ced10e8804 |
children |
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/* PR c/25682 */ /* { dg-do compile } */ /* { dg-options "-ansi" } */ /* { dg-require-effective-target alloca } */ /* Test whether we don't ICE on questionable constructs where offsetof should have been used instead. */ struct S { char a[4]; int b; }; char c[(char *) &((struct S *) 0)->b - (char *) 0]; /* { dg-warning "variably modified" } */ char d[(__UINTPTR_TYPE__) &((struct S *) 8)->b]; /* { dg-warning "variably modified" } */ char e[sizeof (c) == __builtin_offsetof (struct S, b) ? 1 : -1]; char f[sizeof (d) == __builtin_offsetof (struct S, b) + 8 ? 1 : -1]; extern void bar (char *, char *); void foo (void) { char g[(char *) &((struct S *) 0)->b - (char *) 0]; char h[(__UINTPTR_TYPE__) &((struct S *) 8)->b]; char i[sizeof (g) == __builtin_offsetof (struct S, b) ? 1 : -1]; char j[sizeof (h) == __builtin_offsetof (struct S, b) + 8 ? 1 : -1]; bar (g, h); }