Add the clang library to the repo (with some of my changes, too).

1 files changed, 446 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/eh.cpp b/clang/test/CodeGenCXX/eh.cpp
new file mode 100644
index 0000000..584af40
--- /dev/null
+++ b/clang/test/CodeGenCXX/eh.cpp
@@ -0,0 +1,446 @@
+// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o %t.ll
+// RUN: FileCheck --input-file=%t.ll %s
+
+struct test1_D {
+  double d;
+} d1;
+
+void test1() {
+  throw d1;
+}
+
+// CHECK:     define void @_Z5test1v()
+// CHECK:       [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8)
+// CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
+// CHECK-NEXT:  [[EXN2:%.*]] = bitcast [[DSTAR]] [[EXN]] to i8*
+// CHECK-NEXT:  call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[EXN2]], i8* bitcast ([[DSTAR]] @d1 to i8*), i64 8, i32 8, i1 false)
+// CHECK-NEXT:  call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({ i8*, i8* }* @_ZTI7test1_D to i8*), i8* null) noreturn
+// CHECK-NEXT:  unreachable
+
+
+struct test2_D {
+  test2_D(const test2_D&o);
+  test2_D();
+  virtual void bar() { }
+  int i; int j;
+} d2;
+
+void test2() {
+  throw d2;
+}
+
+// CHECK:     define void @_Z5test2v()
+// CHECK:       [[EXNVAR:%.*]] = alloca i8*
+// CHECK-NEXT:  [[SELECTORVAR:%.*]] = alloca i32
+// CHECK-NEXT:  [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 16)
+// CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
+// CHECK-NEXT:  invoke void @_ZN7test2_DC1ERKS_([[DSTAR]] [[EXN]], [[DSTAR]] @d2)
+// CHECK-NEXT:     to label %[[CONT:.*]] unwind label %{{.*}}
+//      :     [[CONT]]:   (can't check this in Release-Asserts builds)
+// CHECK:       call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({{.*}}* @_ZTI7test2_D to i8*), i8* null) noreturn
+// CHECK-NEXT:  unreachable
+
+
+struct test3_D {
+  test3_D() { }
+  test3_D(volatile test3_D&o);
+  virtual void bar();
+};
+
+void test3() {
+  throw (volatile test3_D *)0;
+}
+
+// CHECK:     define void @_Z5test3v()
+// CHECK:       [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8)
+// CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[D:%[^*]+]]**
+// CHECK-NEXT:  store [[D]]* null, [[D]]** [[EXN]]
+// CHECK-NEXT:  call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({ i8*, i8*, i32, i8* }* @_ZTIPV7test3_D to i8*), i8* null) noreturn
+// CHECK-NEXT:  unreachable
+
+
+void test4() {
+  throw;
+}
+
+// CHECK:     define void @_Z5test4v()
+// CHECK:        call void @__cxa_rethrow() noreturn
+// CHECK-NEXT:   unreachable
+
+
+// rdar://problem/7696549
+namespace test5 {
+  struct A {
+    A();
+    A(const A&);
+    ~A();
+  };
+
+  void test() {
+    try { throw A(); } catch (A &x) {}
+  }
+// CHECK:      define void @_ZN5test54testEv()
+// CHECK:      [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 1)
+// CHECK:      [[EXNCAST:%.*]] = bitcast i8* [[EXNOBJ]] to [[A:%[^*]*]]*
+// CHECK-NEXT: invoke void @_ZN5test51AC1Ev([[A]]* [[EXNCAST]])
+// CHECK:      invoke void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({{.*}}* @_ZTIN5test51AE to i8*), i8* bitcast (void ([[A]]*)* @_ZN5test51AD1Ev to i8*)) noreturn
+// CHECK-NEXT:   to label {{%.*}} unwind label %[[HANDLER:[^ ]*]]
+//      :    [[HANDLER]]:  (can't check this in Release-Asserts builds)
+// CHECK:      {{%.*}} = call i32 @llvm.eh.typeid.for(i8* bitcast ({{.*}}* @_ZTIN5test51AE to i8*))
+}
+
+namespace test6 {
+  template <class T> struct allocator {
+    ~allocator() throw() { }
+  };
+
+  void foo() {
+    allocator<int> a;
+  }
+}
+
+// PR7127
+namespace test7 {
+// CHECK:      define i32 @_ZN5test73fooEv() 
+  int foo() {
+// CHECK:      [[CAUGHTEXNVAR:%.*]] = alloca i8*
+// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
+// CHECK-NEXT: [[INTCATCHVAR:%.*]] = alloca i32
+    try {
+      try {
+// CHECK-NEXT: [[EXNALLOC:%.*]] = call i8* @__cxa_allocate_exception
+// CHECK-NEXT: bitcast i8* [[EXNALLOC]] to i32*
+// CHECK-NEXT: store i32 1, i32*
+// CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXNALLOC]], i8* bitcast (i8** @_ZTIi to i8*), i8* null
+        throw 1;
+      }
+
+// CHECK:      [[CAUGHTVAL:%.*]] = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+// CHECK-NEXT:   catch i8* bitcast (i8** @_ZTIi to i8*)
+// CHECK-NEXT:   catch i8* null
+// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 0
+// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
+// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 1
+// CHECK-NEXT: store i32 [[SELECTOR]], i32* [[SELECTORVAR]]
+// CHECK-NEXT: br label
+// CHECK:      [[SELECTOR:%.*]] = load i32* [[SELECTORVAR]]
+// CHECK-NEXT: [[T0:%.*]] = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
+// CHECK-NEXT: icmp eq i32 [[SELECTOR]], [[T0]]
+// CHECK-NEXT: br i1
+// CHECK:      [[T0:%.*]] = load i8** [[CAUGHTEXNVAR]]
+// CHECK-NEXT: [[T1:%.*]] = call i8* @__cxa_begin_catch(i8* [[T0]])
+// CHECK-NEXT: [[T2:%.*]] = bitcast i8* [[T1]] to i32*
+// CHECK-NEXT: [[T3:%.*]] = load i32* [[T2]]
+// CHECK-NEXT: store i32 [[T3]], i32* {{%.*}}, align 4
+// CHECK-NEXT: invoke void @__cxa_rethrow
+      catch (int) {
+        throw;
+      }
+    }
+// CHECK:      [[CAUGHTVAL:%.*]] = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+// CHECK-NEXT:   catch i8* null
+// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 0
+// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
+// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 1
+// CHECK-NEXT: store i32 [[SELECTOR]], i32* [[SELECTORVAR]]
+// CHECK-NEXT: call void @__cxa_end_catch()
+// CHECK-NEXT: br label
+// CHECK:      load i8** [[CAUGHTEXNVAR]]
+// CHECK-NEXT: call i8* @__cxa_begin_catch
+// CHECK-NEXT: call void @__cxa_end_catch
+    catch (...) {
+    }
+// CHECK:      ret i32 0
+    return 0;
+  }
+}
+
+// Ordering of destructors in a catch handler.
+namespace test8 {
+  struct A { A(const A&); ~A(); };
+  void bar();
+
+  // CHECK: define void @_ZN5test83fooEv()
+  void foo() {
+    try {
+      // CHECK:      invoke void @_ZN5test83barEv()
+      bar();
+    } catch (A a) {
+      // CHECK:      call i8* @__cxa_get_exception_ptr
+      // CHECK-NEXT: bitcast
+      // CHECK-NEXT: invoke void @_ZN5test81AC1ERKS0_(
+      // CHECK:      call i8* @__cxa_begin_catch
+      // CHECK-NEXT: call void @_ZN5test81AD1Ev(
+      // CHECK:      call void @__cxa_end_catch()
+      // CHECK:      ret void
+    }
+  }
+}
+
+// Constructor function-try-block must rethrow on fallthrough.
+// rdar://problem/7696603
+namespace test9 {
+  void opaque();
+
+  struct A { A(); };
+
+  // CHECK:      define void @_ZN5test91AC1Ev(%"struct.test9::A"* %this) unnamed_addr
+  // CHECK:      call void @_ZN5test91AC2Ev
+  // CHECK-NEXT: ret void
+
+  // CHECK: define void @_ZN5test91AC2Ev(%"struct.test9::A"* %this) unnamed_addr
+  A::A() try {
+  // CHECK:      invoke void @_ZN5test96opaqueEv()
+    opaque();
+  } catch (int x) {
+  // CHECK:      landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+  // CHECK-NEXT:   catch i8* bitcast (i8** @_ZTIi to i8*)
+
+  // CHECK:      call i8* @__cxa_begin_catch
+  // CHECK:      invoke void @_ZN5test96opaqueEv()
+  // CHECK:      invoke void @__cxa_rethrow()
+    opaque();
+  }
+}
+
+// __cxa_end_catch can throw for some kinds of caught exceptions.
+namespace test10 {
+  void opaque();
+
+  struct A { ~A(); };
+  struct B { int x; };
+
+  // CHECK: define void @_ZN6test103fooEv()
+  void foo() {
+    A a; // force a cleanup context
+
+    try {
+    // CHECK:      invoke void @_ZN6test106opaqueEv()
+      opaque();
+    } catch (int i) {
+    // CHECK:      call i8* @__cxa_begin_catch
+    // CHECK-NEXT: bitcast
+    // CHECK-NEXT: load i32*
+    // CHECK-NEXT: store i32
+    // CHECK-NEXT: call void @__cxa_end_catch() nounwind
+    } catch (B a) {
+    // CHECK:      call i8* @__cxa_begin_catch
+    // CHECK-NEXT: bitcast
+    // CHECK-NEXT: bitcast
+    // CHECK-NEXT: bitcast
+    // CHECK-NEXT: call void @llvm.memcpy
+    // CHECK-NEXT: invoke void @__cxa_end_catch()
+    } catch (...) {
+    // CHECK:      call i8* @__cxa_begin_catch
+    // CHECK-NEXT: invoke void @__cxa_end_catch()
+    }
+
+    // CHECK: call void @_ZN6test101AD1Ev(
+  }
+}
+
+// __cxa_begin_catch returns pointers by value, even when catching by reference
+// <rdar://problem/8212123>
+namespace test11 {
+  void opaque();
+
+  // CHECK: define void @_ZN6test113fooEv()
+  void foo() {
+    try {
+      // CHECK:      invoke void @_ZN6test116opaqueEv()
+      opaque();
+    } catch (int**&p) {
+      // CHECK:      [[EXN:%.*]] = load i8**
+      // CHECK-NEXT: call i8* @__cxa_begin_catch(i8* [[EXN]]) nounwind
+      // CHECK-NEXT: [[ADJ1:%.*]] = getelementptr i8* [[EXN]], i32 32
+      // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to i32***
+      // CHECK-NEXT: store i32*** [[ADJ2]], i32**** [[P:%.*]]
+      // CHECK-NEXT: call void @__cxa_end_catch() nounwind
+    }
+  }
+
+  struct A {};
+
+  // CHECK: define void @_ZN6test113barEv()
+  void bar() {
+    try {
+      // CHECK:      [[EXNSLOT:%.*]] = alloca i8*
+      // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
+      // CHECK-NEXT: [[P:%.*]] = alloca [[A:%.*]]**,
+      // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]]*
+      // CHECK-NEXT: invoke void @_ZN6test116opaqueEv()
+      opaque();
+    } catch (A*&p) {
+      // CHECK:      [[EXN:%.*]] = load i8** [[EXNSLOT]]
+      // CHECK-NEXT: [[ADJ1:%.*]] = call i8* @__cxa_begin_catch(i8* [[EXN]]) nounwind
+      // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to [[A]]*
+      // CHECK-NEXT: store [[A]]* [[ADJ2]], [[A]]** [[TMP]]
+      // CHECK-NEXT: store [[A]]** [[TMP]], [[A]]*** [[P]]
+      // CHECK-NEXT: call void @__cxa_end_catch() nounwind
+    }
+  }
+}
+
+// PR7686
+namespace test12 {
+  struct A { ~A() noexcept(false); };
+  bool opaque(const A&);
+
+  // CHECK: define void @_ZN6test124testEv()
+  void test() {
+    // CHECK: [[X:%.*]] = alloca [[A:%.*]],
+    // CHECK: [[EHCLEANUPDEST:%.*]] = alloca i32
+    // CHECK: [[Y:%.*]] = alloca [[A]]
+    // CHECK: [[Z:%.*]] = alloca [[A]]
+    // CHECK: [[CLEANUPDEST:%.*]] = alloca i32
+
+    A x;
+    // CHECK: invoke zeroext i1 @_ZN6test126opaqueERKNS_1AE(
+    if (opaque(x)) {
+      A y;
+      A z;
+
+      // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Z]])
+      // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Y]])
+      // CHECK-NOT: switch
+      goto success;
+    }
+
+  success:
+    bool _ = true;
+
+    // CHECK: call void @_ZN6test121AD1Ev([[A]]* [[X]])
+    // CHECK-NEXT: ret void
+  }
+}
+
+// Reduced from some TableGen code that was causing a self-host crash.
+namespace test13 {
+  struct A { ~A(); };
+
+  void test0(int x) {
+    try {
+      switch (x) {
+      case 0:
+        break;
+      case 1:{
+        A a;
+        break;
+      }
+      default:
+        return;
+      }
+      return;
+    } catch (int x) {
+    }
+    return;
+  }
+
+  void test1(int x) {
+    A y;
+    try {
+      switch (x) {
+      default: break;
+      }
+    } catch (int x) {}
+  }
+}
+
+// rdar://problem/8231514
+namespace test14 {
+  struct A { ~A(); };
+  struct B { ~B(); };
+
+  B b();
+  void opaque();
+
+  void foo() {
+    A a;
+    try {
+      B str = b();
+      opaque();
+    } catch (int x) {
+    }
+  }
+}
+
+// rdar://problem/8231514
+// JumpDests shouldn't get confused by scopes that aren't normal cleanups.
+namespace test15 {
+  struct A { ~A(); };
+
+  bool opaque(int);
+
+  // CHECK: define void @_ZN6test153fooEv()
+  void foo() {
+    A a;
+
+    try {
+      // CHECK:      [[X:%.*]] = alloca i32
+      // CHECK:      store i32 10, i32* [[X]]
+      // CHECK-NEXT: br label
+      //   -> while.cond
+      int x = 10;
+
+      while (true) {
+        // CHECK:      load i32* [[X]]
+        // CHECK-NEXT: [[COND:%.*]] = invoke zeroext i1 @_ZN6test156opaqueEi
+        // CHECK:      br i1 [[COND]]
+        if (opaque(x))
+        // CHECK:      br label
+          break;
+
+        // CHECK:      br label
+      }
+      // CHECK:      br label
+    } catch (int x) { }
+
+    // CHECK: call void @_ZN6test151AD1Ev
+  }
+}
+
+namespace test16 {
+  struct A { A(); ~A() noexcept(false); };
+  struct B { int x; B(const A &); ~B() noexcept(false); };
+  void foo();
+  bool cond();
+
+  // CHECK: define void @_ZN6test163barEv()
+  void bar() {
+    // CHECK:      [[EXN_SAVE:%.*]] = alloca i8*
+    // CHECK-NEXT: [[EXN_ACTIVE:%.*]] = alloca i1
+    // CHECK-NEXT: [[TEMP:%.*]] = alloca [[A:%.*]],
+    // CHECK-NEXT: [[EXNSLOT:%.*]] = alloca i8*
+    // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
+    // CHECK-NEXT: [[TEMP_ACTIVE:%.*]] = alloca i1
+
+    cond() ? throw B(A()) : foo();
+
+    // CHECK-NEXT: [[COND:%.*]] = call zeroext i1 @_ZN6test164condEv()
+    // CHECK-NEXT: store i1 false, i1* [[EXN_ACTIVE]]
+    // CHECK-NEXT: store i1 false, i1* [[TEMP_ACTIVE]]
+    // CHECK-NEXT: br i1 [[COND]],
+
+    // CHECK:      [[EXN:%.*]] = call i8* @__cxa_allocate_exception(i64 4)
+    // CHECK-NEXT: store i8* [[EXN]], i8** [[EXN_SAVE]]
+    // CHECK-NEXT: store i1 true, i1* [[EXN_ACTIVE]]
+    // CHECK-NEXT: [[T0:%.*]] = bitcast i8* [[EXN]] to [[B:%.*]]*
+    // CHECK-NEXT: invoke void @_ZN6test161AC1Ev([[A]]* [[TEMP]])
+    // CHECK:      store i1 true, i1* [[TEMP_ACTIVE]]
+    // CHECK-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE([[B]]* [[T0]], [[A]]* [[TEMP]])
+    // CHECK:      store i1 false, i1* [[EXN_ACTIVE]]
+    // CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXN]],
+
+    // CHECK:      invoke void @_ZN6test163fooEv()
+    // CHECK:      br label
+
+    // CHECK:      invoke void @_ZN6test161AD1Ev([[A]]* [[TEMP]])
+    // CHECK:      ret void
+
+    // CHECK:      [[T0:%.*]] = load i1* [[EXN_ACTIVE]]
+    // CHECK-NEXT: br i1 [[T0]]
+    // CHECK:      [[T1:%.*]] = load i8** [[EXN_SAVE]]
+    // CHECK-NEXT: call void @__cxa_free_exception(i8* [[T1]])
+    // CHECK-NEXT: br label
+  }
+}