56 lines
789 B
C
56 lines
789 B
C
/* PR optimization/5844
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This testcase was miscompiled because of an rtx sharing bug. */
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/* { dg-do run } */
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/* { dg-options "-O2" } */
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/* { dg-options "-O2 -mtune=i586" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
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/* { dg-xfail-if "doesn't support self-referential initializers" { nvptx-*-* } } */
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struct A
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{
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struct A *a;
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int b;
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};
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struct B
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{
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struct A *c;
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unsigned int d;
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};
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struct A p = { &p, -1 };
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struct B q = { &p, 0 };
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extern void abort (void);
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extern void exit (int);
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struct B *
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foo (void)
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{
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return &q;
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}
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void
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bar (void)
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{
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struct B *e = foo ();
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struct A *f = e->c;
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int g = f->b;
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if (++g == 0)
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{
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e->d++;
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e->c = f->a;
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}
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f->b = g;
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}
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int
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main ()
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{
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bar ();
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if (p.b != 0 || q.d != 1 || q.c != &p)
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abort ();
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exit (0);
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}
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