180 lines
1.9 KiB
C
180 lines
1.9 KiB
C
/* { dg-do compile } */
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/* { dg-options "-Wunused" } */
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void
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f1 (void)
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{
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int a; /* { dg-warning "set but not used" } */
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int b;
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int c;
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c = 1;
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a = b = c;
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}
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void
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f2 (int x)
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{
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int a; /* { dg-warning "set but not used" } */
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int b;
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int c; /* { dg-warning "set but not used" } */
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c = (a = x, b = x);
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}
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int
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f3 (int x)
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{
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int a;
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return a = x;
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}
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int
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f4 (int x)
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{
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int a;
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a = x;
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return a;
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}
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void
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f5 (int x)
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{
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int a[2]; /* { dg-warning "set but not used" } */
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int b;
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int *c, d[2];
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c = d;
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b = x;
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a[b] = 1;
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c[b] = 1;
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}
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int
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f6 (int x)
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{
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int a[2];
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int b;
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b = x;
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a[b] = 1;
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return a[b];
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}
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void
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f7 (int x, int *p)
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{
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int *a[2];
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a[x] = p;
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a[x][x] = x;
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}
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struct S { int i; };
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void
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f8 (void)
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{
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struct S s; /* { dg-warning "set but not used" } */
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s.i = 6;
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}
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int
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f9 (void)
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{
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struct S s;
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s.i = 6;
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return s.i;
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}
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struct S
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f10 (void)
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{
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struct S s;
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s.i = 6;
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return s;
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}
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extern int foo11 (int *);
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void
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f11 (void)
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{
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int a[2];
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foo11 (a);
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}
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void
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f12 (void)
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{
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int a;
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a = 1;
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a; /* { dg-warning "no effect" } */
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}
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void
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f13 (void (*x) (void))
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{
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void (*a) (void);
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a = x;
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a ();
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}
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void
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f14 (void (*x) (void))
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{
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void (*a) (void); /* { dg-warning "set but not used" } */
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a = x;
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}
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extern void foo15 (int *);
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void
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f15 (void)
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{
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int a[10];
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int *b = a + 2;
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foo15 (b);
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}
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extern void foo16 (int **);
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void
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f16 (void)
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{
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int a[10];
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int *b[] = { a, a + 2 };
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foo16 (b);
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}
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void
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f17 (int x)
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{
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long a; /* { dg-warning "set but not used" } */
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int b;
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a = b = x;
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}
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void
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f18 (int x)
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{
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int a; /* { dg-warning "set but not used" } */
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int b;
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a = (char) (b = x);
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}
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int
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f19 (int x, int y, int z)
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{
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int a;
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int b;
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a = x;
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b = y;
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return z ? a : b;
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}
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int *
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f20 (int x)
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{
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static int a[] = { 3, 4, 5, 6 };
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static int b[] = { 4, 5, 6, 7 };
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static int c[] = { 5, 6, 7, 8 }; /* { dg-warning "set but not used" } */
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c[1] = 1;
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return x ? a : b;
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}
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