51 lines
2.4 KiB
C
51 lines
2.4 KiB
C
/* PR tree-optimization/98597 */
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/* { dg-do compile } */
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/* { dg-options "-O2 -fno-tree-vectorize -Wuninitialized" } */
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union U { double d; int i; float f; };
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struct S { char a; int b; char c; unsigned d; union U e; int f[3]; unsigned g[3]; };
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struct T { char t; struct S u; int v; };
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typedef short V[2][2];
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void baz (V *);
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static inline int
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bar (char *p)
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{
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return *(int *) p;
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}
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void
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foo (int *q)
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{
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struct T t;
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t.t = 1;
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t.u.c = 2;
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char *pt = (char *) &t;
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q[0] = bar (pt + __builtin_offsetof (struct T, u.b)); /* { dg-warning "'t\\.u\\.b' is used uninitialized" } */
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q[1] = bar (pt + __builtin_offsetof (struct T, u.e)); /* { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)&t \\+ offsetof\\(struct T, u\\.e\\)\\)' is used uninitialized" } */
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q[2] = bar (pt + __builtin_offsetof (struct T, v)); /* { dg-warning "'t\\.v' is used uninitialized" } */
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q[3] = bar (pt + __builtin_offsetof (struct T, u.d)); /* { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)&t \\+ offsetof\\(struct T, u\\.d\\)\\)' is used uninitialized" } */
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q[4] = bar (pt + __builtin_offsetof (struct T, u.f[2])); /* { dg-warning "'t\\.u\\.f\\\[2\\\]' is used uninitialized" } */
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q[5] = bar (pt + __builtin_offsetof (struct T, u.g[2])); /* { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)&t \\+ offsetof\\(struct T, u\\.g\\\[2\\\]\\)\\)' is used uninitialized" } */
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int s[3];
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s[0] = 1;
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char *ps = (char *) s;
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q[6] = bar (ps + sizeof (int)); /* { dg-warning "'s\\\[1\\\]' is used uninitialized" } */
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unsigned w[2][2];
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w[0][0] = 1;
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char *pw = (char *) w;
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q[7] = bar (pw + 3 * sizeof (unsigned)); /* { dg-warning "'\\*\\(int \\*\\)\\(&w\\\[1\\\]\\\[1\\\]\\)' is used uninitialized" } */
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struct T x[3][3];
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x[0][0].t = 1;
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char *px = (char *) x;
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q[8] = bar (px + 5 * sizeof (struct T) + __builtin_offsetof (struct T, u.b)); /* { dg-warning "'x\\\[1\\\]\\\[2\\\]\\.u\\.b' is used uninitialized" } */
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q[9] = bar (px + 6 * sizeof (struct T) + __builtin_offsetof (struct T, u.d)); /* { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)&x\\\[2\\\]\\\[0\\\] \\+ offsetof\\(struct T, u\\.d\\)\\)' is used uninitialized" } */
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#if defined(__i386__) || defined(__x86_64__)
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/* memcpy folding is too target dependent to test it everywhere. */
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V u[2], v[2];
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u[0][0][0] = 1;
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__builtin_memcpy (&v[1], &u[1], sizeof (V)); /* { dg-warning "'u' is used uninitialized" "" { target i?86-*-* x86_64-*-* } } */
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baz (&v[1]);
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#endif
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}
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