ARM64: initial clang support commit.

This adds Clang support for the ARM64 backend. There are definitely
still some rough edges, so please bring up any issues you see with
this patch.

As with the LLVM commit though, we think it'll be more useful for
merging with AArch64 from within the tree.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205100 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 88 insertions, 0 deletions

diff --git a/test/CodeGenCXX/arm64.cpp b/test/CodeGenCXX/arm64.cpp
new file mode 100644
index 0000000000..d0d4f4f70e
--- /dev/null
+++ b/test/CodeGenCXX/arm64.cpp
@@ -0,0 +1,88 @@
+// RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck -check-prefix=CHECK-GLOBALS %s
+
+// __cxa_guard_acquire argument is 64-bit
+// rdar://11540122
+struct A {
+  A();
+};
+
+void f() {
+  // CHECK: call i32 @__cxa_guard_acquire(i64*
+  static A a;
+}
+
+// ARM64 uses the C++11 definition of POD.
+// rdar://12650514
+namespace test1 {
+  // This class is POD in C++11 and cannot have objects allocated in
+  // its tail-padding.
+  struct ABase {};
+  struct A : ABase {
+    int x;
+    char c;
+  };
+
+  struct B : A {
+    char d;
+  };
+
+  int test() {
+    return sizeof(B);
+  }
+  // CHECK: define i32 @_ZN5test14testEv()
+  // CHECK: ret i32 12
+}
+
+namespace std {
+  class type_info;
+}
+
+// ARM64 uses string comparisons for what would otherwise be
+// default-visibility weak RTTI.  rdar://12650568
+namespace test2 {
+  struct A {
+    virtual void foo();
+  };
+  void A::foo() {}
+  // Tested below because these globals get kindof oddly rearranged.
+
+  struct __attribute__((visibility("hidden"))) B {};
+  const std::type_info &b0 = typeid(B);
+  // CHECK-GLOBALS: @_ZTSN5test21BE = linkonce_odr hidden constant
+  // CHECK-GLOBALS: @_ZTIN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([11 x i8]* @_ZTSN5test21BE, i32 0, i32 0) }
+
+  const std::type_info &b1 = typeid(B*);
+  // CHECK-GLOBALS: @_ZTSPN5test21BE = linkonce_odr hidden constant
+  // CHECK-GLOBALS: @_ZTIPN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([12 x i8]* @_ZTSPN5test21BE, i32 0, i32 0), i32 0, i8* bitcast
+
+  struct C {};
+  const std::type_info &c0 = typeid(C);
+  // CHECK-GLOBALS: @_ZTSN5test21CE = linkonce_odr hidden constant
+  // CHECK-GLOBALS: @_ZTIN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([11 x i8]* @_ZTSN5test21CE to i64), i64 -9223372036854775808) to i8*) }
+
+  const std::type_info &c1 = typeid(C*);
+  // CHECK-GLOBALS: @_ZTSPN5test21CE = linkonce_odr hidden constant
+  // CHECK-GLOBALS: @_ZTIPN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([12 x i8]* @_ZTSPN5test21CE to i64), i64 -9223372036854775808) to i8*), i32 0, i8* bitcast
+
+  // This class is explicitly-instantiated, but that instantiation
+  // doesn't guarantee to emit RTTI, so we can still demote the visibility.
+  template <class T> class D {};
+  template class D<int>;
+  const std::type_info &d0 = typeid(D<int>);
+  // CHECK-GLOBALS: @_ZTSN5test21DIiEE = linkonce_odr hidden constant
+  // CHECK-GLOBALS: @_ZTIN5test21DIiEE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21DIiEE to i64), i64 -9223372036854775808) to i8*) }
+
+  // This class is explicitly-instantiated and *does* guarantee to
+  // emit RTTI, so we're stuck with having to use default visibility.
+  template <class T> class E {
+    virtual void foo() {}
+  };
+  template class E<int>;
+  // CHECK-GLOBALS: @_ZTSN5test21EIiEE = weak_odr constant [14 x i8]
+  // CHECK-GLOBALS: @_ZTIN5test21EIiEE = weak_odr constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21EIiEE to i64), i64 -9223372036854775808) to i8*) }
+
+  // CHECK-GLOBALS: @_ZTSN5test21AE = constant [11 x i8]
+  // CHECK-GLOBALS: @_ZTIN5test21AE = constant { {{.*}}, i8* getelementptr inbounds ([11 x i8]* @_ZTSN5test21AE, i32 0, i32 0) }
+
+}