clang/test/CodeGenCXX/guard_nocf.cpp

   1 // RUN: %clang_cc1 -triple %ms_abi_triple -fms-extensions -std=c++11 -emit-llvm -O2 -o - %s | FileCheck %s
   2 // RUN: %clang_cc1 -triple x86_64-w64-windows-gnu -std=c++11 -emit-llvm -O2 -o - %s | FileCheck %s
   3
   4 // The x86_64-w64-windows-gnu version tests mingw target, which relies on
   5 // __declspec(...) being defined as __attribute__((...)) by compiler built-in.
   6
   7 void target_func();
   8 void (*func_ptr)() = &target_func;
   9
  10 // The "guard_nocf" attribute must be added.
  11 __declspec(guard(nocf)) void nocf0() {
  12   (*func_ptr)();
  13 }
  14 // CHECK-LABEL: nocf0
  15 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  16
  17 // Explicitly test using the GNU-style attribute without relying on the
  18 // __declspec define for mingw.
  19 // The "guard_nocf" attribute must be added.
  20 __attribute__((guard(nocf))) void nocf0_gnu_style() {
  21   (*func_ptr)();
  22 }
  23 // CHECK-LABEL: nocf0_gnu_style
  24 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  25
  26 // Test using the c++-style attribute.
  27 // The "guard_nocf" attribute must be added.
  28 [[clang::guard(nocf)]] void nocf0_cxx_style() {
  29   (*func_ptr)();
  30 }
  31 // CHECK-LABEL: nocf0_cxx_style
  32 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  33
  34 // The "guard_nocf" attribute must *not* be added.
  35 void cf0() {
  36   (*func_ptr)();
  37 }
  38 // CHECK-LABEL: cf0
  39 // CHECK: call{{.*}}[[CF:#[0-9]+]]
  40
  41 // If the modifier is present on either the function declaration or definition,
  42 // the "guard_nocf" attribute must be added.
  43 __declspec(guard(nocf)) void nocf1();
  44 void nocf1() {
  45   (*func_ptr)();
  46 }
  47 // CHECK-LABEL: nocf1
  48 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  49
  50 void nocf2();
  51 __declspec(guard(nocf)) void nocf2() {
  52   (*func_ptr)();
  53 }
  54 // CHECK-LABEL: nocf2
  55 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  56
  57 // When inlining a function, the "guard_nocf" attribute on indirect calls must
  58 // be preserved.
  59 void nocf3() {
  60   nocf0();
  61 }
  62 // CHECK-LABEL: nocf3
  63 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  64
  65 // When inlining into a function marked as __declspec(guard(nocf)), the
  66 // "guard_nocf" attribute must *not* be added to the inlined calls.
  67 __declspec(guard(nocf)) void cf1() {
  68   cf0();
  69 }
  70 // CHECK-LABEL: cf1
  71 // CHECK: call{{.*}}[[CF:#[0-9]+]]
  72
  73 // When the __declspec(guard(nocf)) modifier is present on an override function,
  74 // the "guard_nocf" attribute must be added.
  75 struct Base {
  76   virtual void nocf4();
  77 };
  78
  79 struct Derived : Base {
  80   __declspec(guard(nocf)) void nocf4() override {
  81     (*func_ptr)();
  82   }
  83 };
  84 Derived d;
  85 // CHECK-LABEL: nocf4
  86 // CHECK: call{{.*}}[[NOCF:#[0-9]+]]
  87
  88 // When the modifier is not present on an override function, the "guard_nocf"
  89 // attribute must *not* be added, even if the modifier is present on the virtual
  90 // function.
  91 struct Base1 {
  92   __declspec(guard(nocf)) virtual void cf2();
  93 };
  94
  95 struct Derived1 : Base1 {
  96   void cf2() override {
  97     (*func_ptr)();
  98   }
  99 };
 100 Derived1 d1;
 101 // CHECK-LABEL: cf2
 102 // CHECK: call{{.*}}[[CF:#[0-9]+]]
 103
 104 // CHECK: attributes [[NOCF]] = { {{.*}}"guard_nocf"{{.*}} }
 105 // CHECK-NOT: attributes [[CF]] = { {{.*}}"guard_nocf"{{.*}} }