gcc/testsuite/c-c++-common/addrtmp.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-add-options bind_pic_locally } */
   4
   5 typedef struct A { int a,b; } A;
   6 int*g(int*x){return x;}
   7 int*f1(){
   8   A x[2]={{1,2},{3,4}};
   9   return g(&x[1].a); // { dg-warning "returns address of local variable" }
  10 }
  11 int*f2(int n){
  12   A x[2]={{1,2},{3,4}};
  13   return n?0:g(&x[1].a); // { dg-warning "may return address of local variable" }
  14 }
  15 A y[2]={{1,2},{3,4}};
  16 int*h(){
  17   return g(&y[1].a);
  18 }
  19 int*j(int n){
  20   A x[2]={{1,2},{3,4}};
  21   int*p=g(&y[1].a);
  22   if(n==1)p=g(&x[1].a);
  23   if(n==2)p=g(&x[0].b);
  24   return p; // { dg-warning "may return address of local variable" }
  25 }
  26 int*s()
  27 {
  28   static int i;
  29   return &i;
  30 }