clang/test/CIR/CodeGen/static-vars.c

// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o %t.cir
// RUN: FileCheck --input-file=%t.cir %s

void func1(void) {
  // Should lower default-initialized static vars.
  static int i;
  // CHECK-DAG: cir.global "private" internal dsolocal @func1.i = #cir.int<0> : !s32i

  // Should lower constant-initialized static vars.
  static int j = 1;
  // CHECK-DAG: cir.global "private" internal dsolocal @func1.j = #cir.int<1> : !s32i

  // Should properly shadow static vars in nested scopes.
  {
    static int j = 2;
    // CHECK-DAG: cir.global "private" internal dsolocal @func1.j.1 = #cir.int<2> : !s32i
  }
  {
    static int j = 3;
    // CHECK-DAG: cir.global "private" internal dsolocal @func1.j.2 = #cir.int<3> : !s32i
  }

  // Should lower basic static vars arithmetics.
  j++;
  // CHECK-DAG: %[[#V2:]] = cir.get_global @func1.j : !cir.ptr<!s32i>
  // CHECK-DAG: %[[#V3:]] = cir.load %[[#V2]] : !cir.ptr<!s32i>, !s32i
  // CHECK-DAG: %[[#V4:]] = cir.unary(inc, %[[#V3]]) : !s32i, !s32i
  // CHECK-DAG: cir.store %[[#V4]], %[[#V2]] : !s32i, !cir.ptr<!s32i>
}

// Should shadow static vars on different functions.
void func2(void) {
  static char i;
  // CHECK-DAG: cir.global "private" internal dsolocal @func2.i = #cir.int<0> : !s8i
  static float j;
  // CHECK-DAG: cir.global "private" internal dsolocal @func2.j = #cir.fp<0.000000e+00> : !cir.float
}

// Should const initialize static vars with constant addresses.
void func3(void) {
  static int var;
  static int *constAddr = &var;
  // CHECK-DAG: cir.global "private" internal dsolocal @func3.constAddr = #cir.global_view<@func3.var> : !cir.ptr<!s32i>
}

// Should match type size in bytes between var and initializer.
void func4(void) {
  static char string[] = "Hello";
  // CHECK-DAG: cir.global "private" internal dsolocal @func4.string = #cir.const_array<"Hello\00" : !cir.array<!s8i x 6>> : !cir.array<!s8i x 6>
}