exceptions.cpp   [plain text]

// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - -fcxx-exceptions -fexceptions | FileCheck %s

typedef typeof(sizeof(0)) size_t;

// This just shouldn't crash.
namespace test0 {
  struct allocator {
    allocator();
    allocator(const allocator&);
    ~allocator();
  };

  void f();
  void g(bool b, bool c) {
    if (b) {
      if (!c)
        throw allocator();

      return;
    }
    f();
  }
}

namespace test1 {
  struct A { A(int); A(int, int); ~A(); void *p; };

  A *a() {
    // CHECK:    define [[A:%.*]]* @_ZN5test11aEv()
    // CHECK:      [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 5)
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      call void @_ZdlPv(i8* [[NEW]])
    return new A(5);
  }

  A *b() {
    // CHECK:    define [[A:%.*]]* @_ZN5test11bEv()
    // CHECK:      [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: [[FOO:%.*]] = invoke i32 @_ZN5test13fooEv()
    // CHECK:      invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[FOO]])
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      call void @_ZdlPv(i8* [[NEW]])
    extern int foo();
    return new A(foo());
  }

  struct B { B(); ~B(); operator int(); int x; };
  B makeB();

  A *c() {
    // CHECK:    define [[A:%.*]]* @_ZN5test11cEv()
    // CHECK:      [[ACTIVE:%.*]] = alloca i1
    // CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
    // CHECK-NEXT: store i1 true, i1* [[ACTIVE]] 
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test11BC1Ev([[B:%.*]]* [[T0:%.*]])
    // CHECK:      [[T1:%.*]] = getelementptr inbounds [[B]]* [[T0]], i32 0, i32 0
    // CHECK-NEXT: [[T2:%.*]] = load i32* [[T1]], align 4
    // CHECK-NEXT: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[T2]])
    // CHECK:      store i1 false, i1* [[ACTIVE]]
    // CHECK-NEXT: invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
    // CHECK-NEXT: br i1 [[ISACTIVE]]
    // CHECK:      call void @_ZdlPv(i8* [[NEW]])
    return new A(B().x);
  }

  A *d() {
    // CHECK:    define [[A:%.*]]* @_ZN5test11dEv()
    // CHECK:      [[ACTIVE:%.*]] = alloca i1
    // CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
    // CHECK-NEXT: store i1 true, i1* [[ACTIVE]] 
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test11BC1Ev([[B:%.*]]* [[T0:%.*]])
    // CHECK:      [[T1:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T0]])
    // CHECK:      invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[T1]])
    // CHECK:      store i1 false, i1* [[ACTIVE]]
    // CHECK-NEXT: invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
    // CHECK-NEXT: br i1 [[ISACTIVE]]
    // CHECK:      call void @_ZdlPv(i8* [[NEW]])
    return new A(B());
  }

  A *e() {
    // CHECK:    define [[A:%.*]]* @_ZN5test11eEv()
    // CHECK:      [[ACTIVE:%.*]] = alloca i1
    // CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
    // CHECK-NEXT: store i1 true, i1* [[ACTIVE]] 
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test11BC1Ev([[B:%.*]]* [[T0:%.*]])
    // CHECK:      [[T1:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T0]])
    // CHECK:      invoke void @_ZN5test11BC1Ev([[B]]* [[T2:%.*]])
    // CHECK:      [[T3:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T2]])
    // CHECK:      invoke void @_ZN5test11AC1Eii([[A]]* [[CAST]], i32 [[T1]], i32 [[T3]])
    // CHECK:      store i1 false, i1* [[ACTIVE]]
    // CHECK-NEXT: invoke void @_ZN5test11BD1Ev([[B]]* [[T2]])
    // CHECK:      invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
    // CHECK-NEXT: br i1 [[ISACTIVE]]
    // CHECK:      call void @_ZdlPv(i8* [[NEW]])
    return new A(B(), B());
  }
  A *f() {
    return new A(makeB().x);
  }
  A *g() {
    return new A(makeB());
  }
  A *h() {
    return new A(makeB(), makeB());
  }

  A *i() {
    // CHECK:    define [[A:%.*]]* @_ZN5test11iEv()
    // CHECK:      [[X:%.*]] = alloca [[A]]*, align 8
    // CHECK:      [[ACTIVE:%.*]] = alloca i1
    // CHECK:      [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
    // CHECK-NEXT: store i1 true, i1* [[ACTIVE]] 
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test15makeBEv([[B:%.*]]* sret [[T0:%.*]])
    // CHECK:      [[T1:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T0]])
    // CHECK:      invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[T1]])
    // CHECK:      store i1 false, i1* [[ACTIVE]]
    // CHECK-NEXT: store [[A]]* [[CAST]], [[A]]** [[X]], align 8
    // CHECK:      invoke void @_ZN5test15makeBEv([[B:%.*]]* sret [[T2:%.*]])
    // CHECK:      [[RET:%.*]] = load [[A]]** [[X]], align 8
    // CHECK:      invoke void @_ZN5test11BD1Ev([[B]]* [[T2]])
    // CHECK:      invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
    // CHECK:      ret [[A]]* [[RET]]
    // CHECK:      [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
    // CHECK-NEXT: br i1 [[ISACTIVE]]
    // CHECK:      call void @_ZdlPv(i8* [[NEW]])
    A *x;
    return (x = new A(makeB()), makeB(), x);
  }
}

namespace test2 {
  struct A {
    A(int); A(int, int); ~A();
    void *p;
    void *operator new(size_t);
    void operator delete(void*, size_t);
  };

  A *a() {
    // CHECK:    define [[A:%.*]]* @_ZN5test21aEv()
    // CHECK:      [[NEW:%.*]] = call i8* @_ZN5test21AnwEm(i64 8)
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test21AC1Ei([[A]]* [[CAST]], i32 5)
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      invoke void @_ZN5test21AdlEPvm(i8* [[NEW]], i64 8)
    // CHECK:      call void @_ZSt9terminatev()
    return new A(5);
  }
}

namespace test3 {
  struct A {
    A(int); A(int, int); A(const A&); ~A();
    void *p;
    void *operator new(size_t, void*, double);
    void operator delete(void*, void*, double);
  };

  void *foo();
  double bar();
  A makeA(), *makeAPtr();

  A *a() {
    // CHECK:    define [[A:%.*]]* @_ZN5test31aEv()
    // CHECK:      [[FOO:%.*]] = call i8* @_ZN5test33fooEv()
    // CHECK:      [[BAR:%.*]] = call double @_ZN5test33barEv()
    // CHECK:      [[NEW:%.*]] = call i8* @_ZN5test31AnwEmPvd(i64 8, i8* [[FOO]], double [[BAR]])
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test31AC1Ei([[A]]* [[CAST]], i32 5)
    // CHECK:      ret [[A]]* [[CAST]]
    // CHECK:      invoke void @_ZN5test31AdlEPvS1_d(i8* [[NEW]], i8* [[FOO]], double [[BAR]])
    // CHECK:      call void @_ZSt9terminatev()
    return new(foo(),bar()) A(5);
  }

  // rdar://problem/8439196
  A *b(bool cond) {

    // CHECK:    define [[A:%.*]]* @_ZN5test31bEb(i1 zeroext
    // CHECK:      [[SAVED0:%.*]] = alloca i8*
    // CHECK-NEXT: [[SAVED1:%.*]] = alloca i8*
    // CHECK-NEXT: [[CLEANUPACTIVE:%.*]] = alloca i1

    // CHECK:      [[COND:%.*]] = trunc i8 {{.*}} to i1
    // CHECK-NEXT: store i1 false, i1* [[CLEANUPACTIVE]]
    // CHECK-NEXT: br i1 [[COND]]
    return (cond ?

    // CHECK:      [[FOO:%.*]] = call i8* @_ZN5test33fooEv()
    // CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test31AnwEmPvd(i64 8, i8* [[FOO]], double [[CONST:.*]])
    // CHECK-NEXT: store i8* [[NEW]], i8** [[SAVED0]]
    // CHECK-NEXT: store i8* [[FOO]], i8** [[SAVED1]]
    // CHECK-NEXT: store i1 true, i1* [[CLEANUPACTIVE]]
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: invoke void @_ZN5test35makeAEv([[A]]* sret [[CAST]])
    // CHECK: br label
    //   -> cond.end
            new(foo(),10.0) A(makeA()) :

    // CHECK:      [[MAKE:%.*]] = call [[A]]* @_ZN5test38makeAPtrEv()
    // CHECK:      br label
    //   -> cond.end
            makeAPtr());

    // cond.end:
    // CHECK:      [[RESULT:%.*]] = phi [[A]]* {{.*}}[[CAST]]{{.*}}[[MAKE]]
    // CHECK:      ret [[A]]* [[RESULT]]

    // in the EH path:
    // CHECK:      [[ISACTIVE:%.*]] = load i1* [[CLEANUPACTIVE]]
    // CHECK-NEXT: br i1 [[ISACTIVE]]
    // CHECK:      [[V0:%.*]] = load i8** [[SAVED0]]
    // CHECK-NEXT: [[V1:%.*]] = load i8** [[SAVED1]]
    // CHECK-NEXT: invoke void @_ZN5test31AdlEPvS1_d(i8* [[V0]], i8* [[V1]], double [[CONST]])
  }
}

namespace test4 {
  struct A {
    A(int); A(int, int); ~A();
    void *p;
    void *operator new(size_t, void*, void*);
    void operator delete(void*, size_t, void*, void*); // not a match
  };

  A *a() {
    // CHECK:    define [[A:%.*]]* @_ZN5test41aEv()
    // CHECK:      [[FOO:%.*]] = call i8* @_ZN5test43fooEv()
    // CHECK-NEXT: [[BAR:%.*]] = call i8* @_ZN5test43barEv()
    // CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test41AnwEmPvS1_(i64 8, i8* [[FOO]], i8* [[BAR]])
    // CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
    // CHECK-NEXT: call void @_ZN5test41AC1Ei([[A]]* [[CAST]], i32 5)
    // CHECK-NEXT: ret [[A]]* [[CAST]]
    extern void *foo(), *bar();

    return new(foo(),bar()) A(5);
  }
}

// PR7908
namespace test5 {
  struct T { T(); ~T(); };

  struct A {
    A(const A &x, const T &t = T());
    ~A();
  };

  void foo();

  // CHECK:    define void @_ZN5test54testEv()
  // CHECK:      [[EXNSLOT:%.*]] = alloca i8*
  // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
  // CHECK-NEXT: [[A:%.*]] = alloca [[A_T:%.*]], align 1
  // CHECK-NEXT: [[T:%.*]] = alloca [[T_T:%.*]], align 1
  // CHECK-NEXT: invoke void @_ZN5test53fooEv()
  // CHECK:      [[EXN:%.*]] = load i8** [[EXNSLOT]]
  // CHECK-NEXT: [[ADJ:%.*]] = call i8* @__cxa_get_exception_ptr(i8* [[EXN]])
  // CHECK-NEXT: [[SRC:%.*]] = bitcast i8* [[ADJ]] to [[A_T]]*
  // CHECK-NEXT: invoke void @_ZN5test51TC1Ev([[T_T]]* [[T]])
  // CHECK:      invoke void @_ZN5test51AC1ERKS0_RKNS_1TE([[A_T]]* [[A]], [[A_T]]* [[SRC]], [[T_T]]* [[T]])
  // CHECK:      invoke void @_ZN5test51TD1Ev([[T_T]]* [[T]])
  // CHECK:      call i8* @__cxa_begin_catch(i8* [[EXN]]) nounwind
  // CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A_T]]* [[A]])
  // CHECK:      call void @__cxa_end_catch()
  void test() {
    try {
      foo();
    } catch (A a) {
    }
  }
}

// PR9303: invalid assert on this
namespace test6 {
  bool cond();
  void test() {
    try {
    lbl:
      if (cond()) goto lbl;
    } catch (...) {
    }
  }
}

// PR9298
namespace test7 {
  struct A { A(); ~A(); };
  struct B {
    // The throw() operator means that a bad allocation is signalled
    // with a null return, which means that the initializer is
    // evaluated conditionally.
    static void *operator new(size_t size) throw();
    B(const A&, B*);
    ~B();
  };

  B *test() {
    // CHECK: define [[B:%.*]]* @_ZN5test74testEv()
    // CHECK:      [[OUTER_NEW:%.*]] = alloca i1
    // CHECK-NEXT: alloca [[A:%.*]],
    // CHECK-NEXT: alloca i8*
    // CHECK-NEXT: alloca i32
    // CHECK-NEXT: [[OUTER_A:%.*]] = alloca i1
    // CHECK-NEXT: alloca i8*
    // CHECK-NEXT: [[INNER_NEW:%.*]] = alloca i1
    // CHECK-NEXT: alloca [[A]]
    // CHECK-NEXT: [[INNER_A:%.*]] = alloca i1

    // Allocate the outer object.
    // CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test71BnwEm(
    // CHECK-NEXT: icmp eq i8* [[NEW]], null

    // These stores, emitted before the outermost conditional branch,
    // deactivate the temporary cleanups.
    // CHECK-NEXT: store i1 false, i1* [[OUTER_NEW]]
    // CHECK-NEXT: store i1 false, i1* [[OUTER_A]]
    // CHECK-NEXT: store i1 false, i1* [[INNER_NEW]]
    // CHECK-NEXT: store i1 false, i1* [[INNER_A]]
    // CHECK-NEXT: br i1

    // We passed the first null check; activate that cleanup and continue.
    // CHECK:      store i1 true, i1* [[OUTER_NEW]]
    // CHECK-NEXT: bitcast

    // Create the first A temporary and activate that cleanup.
    // CHECK-NEXT: invoke void @_ZN5test71AC1Ev(
    // CHECK:      store i1 true, i1* [[OUTER_A]]

    // Allocate the inner object.
    // CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test71BnwEm(
    // CHECK-NEXT: icmp eq i8* [[NEW]], null
    // CHECK-NEXT: br i1

    // We passed the second null check; save that pointer, activate
    // that cleanup, and continue.
    // CHECK:      store i8* [[NEW]]
    // CHECK-NEXT: store i1 true, i1* [[INNER_NEW]]
    // CHECK-NEXT: bitcast

    // Build the second A temporary and activate that cleanup.
    // CHECK-NEXT: invoke void @_ZN5test71AC1Ev(
    // CHECK:      store i1 true, i1* [[INNER_A]]

    // Build the inner B object and deactivate the inner delete cleanup.
    // CHECK-NEXT: invoke void @_ZN5test71BC1ERKNS_1AEPS0_(
    // CHECK:      store i1 false, i1* [[INNER_NEW]]
    // CHECK:      phi

    // Build the outer B object and deactivate the outer delete cleanup.
    // CHECK-NEXT: invoke void @_ZN5test71BC1ERKNS_1AEPS0_(
    // CHECK:      store i1 false, i1* [[OUTER_NEW]]
    // CHECK:      phi
    // CHECK-NEXT: store [[B]]*

    // Destroy the inner A object.
    // CHECK-NEXT: load i1* [[INNER_A]]
    // CHECK-NEXT: br i1
    // CHECK:      invoke void @_ZN5test71AD1Ev(

    // Destroy the outer A object.
    // CHECK:      load i1* [[OUTER_A]]
    // CHECK-NEXT: br i1
    // CHECK:      invoke void @_ZN5test71AD1Ev(

    return new B(A(), new B(A(), 0));
  }
}

// Just don't crash.
namespace test8 {
  struct A {
    // Having both of these is required to trigger the assert we're
    // trying to avoid.
    A(const A&);
    A&operator=(const A&);

    ~A();
  };

  A makeA();
  void test() {
    throw makeA();
  }
  // CHECK: define void @_ZN5test84testEv
}

// Make sure we generate the correct code for the delete[] call which
// happens if A::A() throws.  (We were previously calling delete[] on
// a pointer to the first array element, not the pointer returned by new[].)
// PR10870
namespace test9 {
  struct A {
    A();
    ~A();
  };
  A* test() {
    return new A[10];
  }
  // CHECK: define {{%.*}}* @_ZN5test94testEv
  // CHECK: [[TEST9_NEW:%.*]] = call noalias i8* @_Znam
  // CHECK: call void @_ZdaPv(i8* [[TEST9_NEW]])
}

// In a destructor with a function-try-block, a return statement in a
// catch handler behaves differently from running off the end of the
// catch handler.  PR13102.
namespace test10 {
  extern void cleanup();
  extern bool suppress;

  struct A { ~A(); };
  A::~A() try { cleanup(); } catch (...) { return; }
  // CHECK:    define void @_ZN6test101AD1Ev(
  // CHECK:      invoke void @_ZN6test107cleanupEv()
  // CHECK-NOT:  rethrow
  // CHECK:      ret void

  struct B { ~B(); };
  B::~B() try { cleanup(); } catch (...) {}
  // CHECK:    define void @_ZN6test101BD1Ev(
  // CHECK:      invoke void @_ZN6test107cleanupEv()
  // CHECK:      call i8* @__cxa_begin_catch
  // CHECK-NEXT: invoke void @__cxa_rethrow()
  // CHECK:      unreachable

  struct C { ~C(); };
  C::~C() try { cleanup(); } catch (...) { if (suppress) return; }
  // CHECK:    define void @_ZN6test101CD1Ev(
  // CHECK:      invoke void @_ZN6test107cleanupEv()
  // CHECK:      call i8* @__cxa_begin_catch
  // CHECK-NEXT: load i8* @_ZN6test108suppressE, align 1
  // CHECK-NEXT: trunc
  // CHECK-NEXT: br i1
  // CHECK:      call void @__cxa_end_catch()
  // CHECK-NEXT: br label
  // CHECK:      invoke void @__cxa_rethrow()
  // CHECK:      unreachable
}