clang/test/CodeGen/builtin-function-start.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -fsanitize=cfi-icall -o - %s | FileCheck %s
   2
   3 #if !__has_builtin(__builtin_function_start)
   4 #error "missing __builtin_function_start"
   5 #endif
   6
   7 void a(void) {}
   8 // CHECK: @e = global ptr no_cfi @_Z1av
   9 const void *e = __builtin_function_start(a);
  10
  11 constexpr void (*d)() = &a;
  12 // CHECK: @f = global ptr no_cfi @_Z1av
  13 const void *f = __builtin_function_start(d);
  14
  15 void b(void) {}
  16 // CHECK: @g = global [2 x ptr] [ptr @_Z1bv, ptr no_cfi @_Z1bv]
  17 void *g[] = {(void *)b, __builtin_function_start(b)};
  18
  19 void c(void *p) {}
  20
  21 class A {
  22 public:
  23   void f();
  24   virtual void g();
  25   static void h();
  26   int i() const;
  27   int i(int n) const;
  28 };
  29
  30 void A::f() {}
  31 void A::g() {}
  32 void A::h() {}
  33
  34 // CHECK: define {{.*}}i32 @_ZNK1A1iEv(ptr {{.*}}%this)
  35 int A::i() const { return 0; }
  36
  37 // CHECK: define {{.*}}i32 @_ZNK1A1iEi(ptr noundef {{.*}}%this, i32 noundef %n)
  38 int A::i(int n) const { return 0; }
  39
  40 void h(void) {
  41   // CHECK: store ptr no_cfi @_Z1bv, ptr %g
  42   void *g = __builtin_function_start(b);
  43   // CHECK: call void @_Z1cPv(ptr noundef no_cfi @_Z1av)
  44   c(__builtin_function_start(a));
  45
  46   // CHECK: store ptr no_cfi @_ZN1A1fEv, ptr %Af
  47   void *Af = __builtin_function_start(&A::f);
  48   // CHECK: store ptr no_cfi @_ZN1A1gEv, ptr %Ag
  49   void *Ag = __builtin_function_start(&A::g);
  50   // CHECK: store ptr no_cfi @_ZN1A1hEv, ptr %Ah
  51   void *Ah = __builtin_function_start(&A::h);
  52   // CHECK: store ptr no_cfi @_ZNK1A1iEv, ptr %Ai1
  53   void *Ai1 = __builtin_function_start((int(A::*)() const) & A::i);
  54   // CHECK: store ptr no_cfi @_ZNK1A1iEi, ptr %Ai2
  55   void *Ai2 = __builtin_function_start((int(A::*)(int) const) & A::i);
  56 }