PR c/18624

[pf3gnuchains/gcc-fork.git] / gcc / testsuite / gcc.dg / Wunused-var-1.c

diff --git a/gcc/testsuite/gcc.dg/Wunused-var-1.c b/gcc/testsuite/gcc.dg/Wunused-var-1.c
index d60dd70..bee34d8 100644 (file)
--- a/gcc/testsuite/gcc.dg/Wunused-var-1.c
+++ b/gcc/testsuite/gcc.dg/Wunused-var-1.c
@@ -1,26 +1,179 @@
 /* { dg-do compile } */
 /* { dg-options "-Wunused" } */
 
-int
+void
 f1 (void)
 {
+  int a;       /* { dg-warning "set but not used" } */
+  int b;
+  int c;
+  c = 1;
+  a = b = c;
+}
+
+void
+f2 (int x)
+{
+  int a;       /* { dg-warning "set but not used" } */
+  int b;
+  int c;       /* { dg-warning "set but not used" } */
+  c = (a = x, b = x);
+}
+
+int
+f3 (int x)
+{
+  int a;
+  return a = x;
+}
+
+int
+f4 (int x)
+{
+  int a;
+  a = x;
+  return a;
+}
+
+void
+f5 (int x)
+{
+  int a[2];    /* { dg-warning "set but not used" } */
+  int b;
+  int *c, d[2];
+  c = d;
+  b = x;
+  a[b] = 1;
+  c[b] = 1;
+}
+
+int
+f6 (int x)
+{
+  int a[2];
+  int b;
+  b = x;
+  a[b] = 1;
+  return a[b];
+}
+
+void
+f7 (int x, int *p)
+{
+  int *a[2];
+  a[x] = p;
+  a[x][x] = x;
+}
+
+struct S { int i; };
+
+void
+f8 (void)
+{
+  struct S s;  /* { dg-warning "set but not used" } */
+  s.i = 6;
+}
+
+int
+f9 (void)
+{
+  struct S s;
+  s.i = 6;
+  return s.i;
+}
+
+struct S
+f10 (void)
+{
+  struct S s;
+  s.i = 6;
+  return s;
+}
+
+extern int foo11 (int *);
+
+void
+f11 (void)
+{
+  int a[2];
+  foo11 (a);
+}
+
+void
+f12 (void)
+{
   int a;
-  int foo (void)
-  {
-    return a;
-  }
   a = 1;
-  return foo ();
+  a;   /* { dg-warning "statement with no effect" } */
 }
 
 void
-f2 (void)
+f13 (void (*x) (void))
+{
+  void (*a) (void);
+  a = x;
+  a ();
+}
+
+void
+f14 (void (*x) (void))
+{
+  void (*a) (void);    /* { dg-warning "set but not used" } */
+  a = x;
+}
+
+extern void foo15 (int *);
+
+void
+f15 (void)
+{
+  int a[10];
+  int *b = a + 2;
+  foo15 (b);
+}
+
+extern void foo16 (int **);
+
+void
+f16 (void)
+{
+  int a[10];
+  int *b[] = { a, a + 2 };
+  foo16 (b);
+}
+
+void
+f17 (int x)
+{
+  long a;      /* { dg-warning "set but not used" } */
+  int b;
+  a = b = x;
+}
+
+void
+f18 (int x)
 {
   int a;       /* { dg-warning "set but not used" } */
-  void foo (void)
-  {
-    a = 2;
-  }
-  a = 1;
-  foo ();
+  int b;
+  a = (char) (b = x);
+}
+
+int
+f19 (int x, int y, int z)
+{
+  int a;
+  int b;
+  a = x;
+  b = y;
+  return z ? a : b;
+}
+
+int *
+f20 (int x)
+{
+  static int a[] = { 3, 4, 5, 6 };
+  static int b[] = { 4, 5, 6, 7 };
+  static int c[] = { 5, 6, 7, 8 };     /* { dg-warning "set but not used" } */
+  c[1] = 1;
+  return x ? a : b;
 }