clang/test/CodeGen/constructor-attribute.c

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=WITHOUTATEXIT %s
   2 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fregister-global-dtors-with-atexit -debug-info-kind=line-tables-only -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=CXAATEXIT --check-prefix=WITHATEXIT %s
   3 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fno-use-cxa-atexit -fregister-global-dtors-with-atexit -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=ATEXIT --check-prefix=WITHATEXIT %s
   4
   5 // WITHOUTATEXIT: global_ctors{{.*}}@A{{.*}}@C
   6 // WITHOUTATEXIT: @llvm.global_dtors = appending global [5 x { i32, ptr, ptr }]{{.*}}@B{{.*}}@E{{.*}}@F{{.*}}@G{{.*}}@D
   7 // WITHATEXIT: @llvm.global_ctors = appending global [5 x { i32, ptr, ptr }]{{.*}}i32 65535, ptr @A,{{.*}}i32 65535, ptr @C,{{.*}}i32 123, ptr @__GLOBAL_init_123,{{.*}}i32 789, ptr @[[GLOBAL_INIT_789:__GLOBAL_init_789.[0-9]+]],{{.*}}i32 65535, ptr @__GLOBAL_init_65535,
   8 // WITHATEXIT-NOT: global_dtors
   9
  10 // CHECK: define{{.*}} void @A()
  11 // CHECK: define{{.*}} void @B()
  12 // CHECK: define internal void @E()
  13 // CHECK: define internal void @F()
  14 // CHECK: define internal void @G()
  15 // CHECK: define{{.*}} i32 @__GLOBAL_init_789(i32 noundef %{{.*}})
  16 // CHECK: define internal void @C()
  17 // CHECK: define internal i32 @foo()
  18 // CHECK: define internal void @D()
  19 // CHECK: define{{.*}} i32 @main()
  20 // WITHOUTATEXIT-NOT: define
  21
  22 // CXAATEXIT: define internal void @__GLOBAL_init_123(){{.*}}section "__TEXT,__StaticInit,regular,pure_instructions" !dbg ![[GLOBAL_INIT_SP:.*]] {
  23 // ATEXIT: define internal void @__GLOBAL_init_123(){{.*}}section "__TEXT,__StaticInit,regular,pure_instructions"
  24 // CXAATEXIT: call i32 @__cxa_atexit(ptr @E, ptr null, ptr @__dso_handle) {{.*}}, !dbg ![[GLOBAL_INIT_LOC:.*]]
  25 // CXAATEXIT: call i32 @__cxa_atexit(ptr @G, ptr null, ptr @__dso_handle)
  26 // ATEXIT: call i32 @atexit(ptr @E)
  27 // ATEXIT: call i32 @atexit(ptr @G)
  28
  29 // WITHATEXIT: define internal void @[[GLOBAL_INIT_789]](){{.*}}section "__TEXT,__StaticInit,regular,pure_instructions"
  30 // CXAATEXIT: call i32 @__cxa_atexit(ptr @F, ptr null, ptr @__dso_handle)
  31 // ATEXIT: call i32 @atexit(ptr @F)
  32
  33 // WITHATEXIT: define internal void @__GLOBAL_init_65535(){{.*}}section "__TEXT,__StaticInit,regular,pure_instructions"
  34 // CXAATEXIT: call i32 @__cxa_atexit(ptr @B, ptr null, ptr @__dso_handle)
  35 // CXAATEXIT: call i32 @__cxa_atexit(ptr @D, ptr null, ptr @__dso_handle)
  36 // ATEXIT: call i32 @atexit(ptr @B)
  37 // ATEXIT: call i32 @atexit(ptr @D)
  38
  39 int printf(const char *, ...);
  40
  41 void A(void) __attribute__((constructor));
  42 void B(void) __attribute__((destructor));
  43
  44 void A(void) {
  45   printf("A\n");
  46 }
  47
  48 void B(void) {
  49   printf("B\n");
  50 }
  51
  52 static void C(void) __attribute__((constructor));
  53
  54 static void D(void) __attribute__((destructor));
  55
  56 static __attribute__((destructor(123))) void E(void) {
  57 }
  58
  59 static __attribute__((destructor(789))) void F(void) {
  60 }
  61
  62 static __attribute__((destructor(123))) void G(void) {
  63 }
  64
  65 // Test that this function doesn't collide with the synthesized constructor
  66 // function for destructors with priority 789.
  67 int __GLOBAL_init_789(int a) {
  68   return a * a;
  69 }
  70
  71 static int foo(void) {
  72   return 10;
  73 }
  74
  75 static void C(void) {
  76   printf("A: %d\n", foo());
  77 }
  78
  79 static void D(void) {
  80   printf("B\n");
  81 }
  82
  83 int main(void) {
  84   return 0;
  85 }
  86
  87 // CXAATEXIT: ![[GLOBAL_INIT_SP]] = distinct !DISubprogram(linkageName: "__GLOBAL_init_123",
  88 // CXAATEXIT: ![[GLOBAL_INIT_LOC]] = !DILocation(line: 0, scope: ![[GLOBAL_INIT_SP]])