clang/test/CodeGen/tentative-decls.c

   1 // RUN: %clang_cc1 -emit-llvm -w -o - %s | FileCheck %s
   2
   3 // CHECK-DAG: @r = {{(dso_local )?}}global [1 x {{.*}}] zeroinitializer
   4
   5 int r[];
   6 int (*a)[] = &r;
   7
   8 struct s0;
   9 struct s0 x;
  10 // CHECK-DAG: @x = {{(dso_local )?}}global %struct.s0 zeroinitializer
  11
  12 struct s0 y;
  13 // CHECK-DAG: @y = {{(dso_local )?}}global %struct.s0 zeroinitializer
  14 struct s0 *f0(void) {
  15   return &y;
  16 }
  17
  18 struct s0 {
  19   int x;
  20 };
  21
  22 // CHECK-DAG: @b = {{(dso_local )?}}global [1 x {{.*}}] zeroinitializer
  23 int b[];
  24 int *f1(void) {
  25   return b;
  26 }
  27
  28 // Check that the most recent tentative definition wins.
  29 // CHECK-DAG: @c = {{(dso_local )?}}global [4 x {{.*}}] zeroinitializer
  30 int c[];
  31 int c[4];
  32
  33 // Check that we emit static tentative definitions
  34 // CHECK-DAG: @c5 = internal global [1 x {{.*}}] zeroinitializer
  35 static int c5[];
  36 static int func(void) { return c5[0]; }
  37 int callfunc(void) { return func(); }
  38