test/CodeGen/tentative-decls.c

   1 // RUN: %clang_cc1 -emit-llvm -o %t %s
   2
   3 // RUN: grep '@r = common global \[1 x .*\] zeroinitializer' %t
   4
   5 int r[];
   6 int (*a)[] = &r;
   7
   8 struct s0;
   9 struct s0 x;
  10 // RUN: grep '@x = common global .struct.s0 zeroinitializer' %t
  11
  12 struct s0 y;
  13 // RUN: grep '@y = common global .struct.s0 zeroinitializer' %t
  14 struct s0 *f0() {
  15   return &y;
  16 }
  17
  18 struct s0 {
  19   int x;
  20 };
  21
  22 // RUN: grep '@b = common global \[1 x .*\] zeroinitializer' %t
  23 int b[];
  24 int *f1() {
  25   return b;
  26 }
  27
  28 // Check that the most recent tentative definition wins.
  29 // RUN: grep '@c = common global \[4 x .*\] zeroinitializer' %t
  30 int c[];
  31 int c[4];
  32
  33 // Check that we emit static tentative definitions
  34 // RUN: grep '@c5 = internal global \[1 x .*\] zeroinitializer' %t
  35 static int c5[];
  36 static int func() { return c5[0]; }
  37 int callfunc() { return func(); }
  38