forked from OSchip/llvm-project
123 lines
5.0 KiB
C++
123 lines
5.0 KiB
C++
// RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 %s -triple=arm64-apple-ios -emit-llvm -o - | FileCheck -check-prefix=CHECK-GLOBALS %s
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// __cxa_guard_acquire argument is 64-bit
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// rdar://11540122
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struct A {
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A();
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};
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void f() {
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// CHECK: call i32 @__cxa_guard_acquire(i64*
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static A a;
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}
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// ARM64 uses the C++11 definition of POD.
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// rdar://12650514
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namespace test1 {
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// This class is POD in C++11 and cannot have objects allocated in
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// its tail-padding.
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struct ABase {};
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struct A : ABase {
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int x;
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char c;
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};
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struct B : A {
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char d;
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};
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int test() {
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return sizeof(B);
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}
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// CHECK: define i32 @_ZN5test14testEv()
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// CHECK: ret i32 12
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}
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namespace std {
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class type_info;
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}
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// ARM64 uses string comparisons for what would otherwise be
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// default-visibility weak RTTI. rdar://12650568
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namespace test2 {
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struct A {
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virtual void foo();
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};
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void A::foo() {}
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// CHECK-GLOBALS-DAG: @_ZTSN5test21AE = constant [11 x i8]
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// CHECK-GLOBALS-DAG: @_ZTIN5test21AE = constant { {{.*}}, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTSN5test21AE, i32 0, i32 0) }
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struct __attribute__((visibility("hidden"))) B {};
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const std::type_info &b0 = typeid(B);
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// CHECK-GLOBALS-DAG: @_ZTSN5test21BE = linkonce_odr hidden constant
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// CHECK-GLOBALS-DAG: @_ZTIN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTSN5test21BE, i32 0, i32 0) }
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const std::type_info &b1 = typeid(B*);
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// CHECK-GLOBALS-DAG: @_ZTSPN5test21BE = linkonce_odr hidden constant
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// CHECK-GLOBALS-DAG: @_ZTIPN5test21BE = linkonce_odr hidden constant { {{.*}}, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @_ZTSPN5test21BE, i32 0, i32 0), i32 0, i8* bitcast
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struct C {};
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const std::type_info &c0 = typeid(C);
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// CHECK-GLOBALS-DAG: @_ZTSN5test21CE = linkonce_odr hidden constant
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// CHECK-GLOBALS-DAG: @_ZTIN5test21CE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([11 x i8]* @_ZTSN5test21CE to i64), i64 -9223372036854775808) to i8*) }
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const std::type_info &c1 = typeid(C*);
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// CHECK-GLOBALS-DAG: @_ZTSPN5test21CE = linkonce_odr hidden constant
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// CHECK-GLOBALS-DAG: @_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
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// This class is explicitly-instantiated, but that instantiation
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// doesn't guarantee to emit RTTI, so we can still demote the visibility.
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template <class T> class D {};
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template class D<int>;
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const std::type_info &d0 = typeid(D<int>);
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// CHECK-GLOBALS-DAG: @_ZTSN5test21DIiEE = linkonce_odr hidden constant
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// CHECK-GLOBALS-DAG: @_ZTIN5test21DIiEE = linkonce_odr hidden constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21DIiEE to i64), i64 -9223372036854775808) to i8*) }
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// This class is explicitly-instantiated and *does* guarantee to
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// emit RTTI, so we're stuck with having to use default visibility.
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template <class T> class E {
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virtual void foo() {}
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};
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template class E<int>;
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// CHECK-GLOBALS-DAG: @_ZTSN5test21EIiEE = weak_odr constant [14 x i8]
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// CHECK-GLOBALS-DAG: @_ZTIN5test21EIiEE = weak_odr constant { {{.*}}, i8* inttoptr (i64 add (i64 ptrtoint ([14 x i8]* @_ZTSN5test21EIiEE to i64), i64 -9223372036854775808) to i8*) }
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}
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// ARM64 reserves the top half of the vtable offset in virtual
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// member pointers.
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namespace test3 {
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struct A {
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virtual void foo();
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virtual void bar();
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};
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// The offset half of the pointer is still initialized to zero.
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// CHECK-GLOBALS-DAG: @_ZN5test34mptrE = global { i64, i64 } { i64 0, i64 1 }
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void (A::*mptr)() = &A::foo;
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// CHECK-LABEL: define void @_ZN5test34testEv()
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// CHECK: [[TEMP:%.*]] = alloca [[A:.*]], align 8
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// CHECK: [[MEMPTR:%.*]] = load { i64, i64 }, { i64, i64 }* @_ZN5test34mptrE, align 8
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// CHECK: [[ADJUST_AND_IS_VIRTUAL:%.*]] = extractvalue { i64, i64 } [[MEMPTR]], 1
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// CHECK: [[ADJUST:%.*]] = ashr i64 [[ADJUST_AND_IS_VIRTUAL]], 1
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// CHECK: [[T0:%.*]] = bitcast [[A]]* [[TEMP]] to i8*
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// CHECK: [[T1:%.*]] = getelementptr inbounds i8, i8* [[T0]], i64 [[ADJUST]]
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// CHECK: [[ADJUSTED:%.*]] = bitcast i8* [[T1]] to [[A]]*
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// CHECK: [[MEMBER:%.*]] = extractvalue { i64, i64 } [[MEMPTR]], 0
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// CHECK: [[T0:%.*]] = and i64 [[ADJUST_AND_IS_VIRTUAL]], 1
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// CHECK: [[IS_VIRTUAL:%.*]] = icmp ne i64 [[T0]], 0
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// CHECK: br i1 [[IS_VIRTUAL]],
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// CHECK: [[T0:%.*]] = bitcast [[A]]* [[ADJUSTED]] to i8**
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// CHECK: [[VPTR:%.*]] = load i8*, i8** [[T0]], align 8
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// CHECK: [[TRUNC:%.*]] = trunc i64 [[MEMBER]] to i32
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// CHECK: [[ZEXT:%.*]] = zext i32 [[TRUNC]] to i64
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// CHECK: [[T0:%.*]] = getelementptr i8, i8* [[VPTR]], i64 [[ZEXT]]
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// CHECK: [[T1:%.*]] = bitcast i8* [[T0]] to void ([[A]]*)**
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// CHECK: load void ([[A]]*)*, void ([[A]]*)** [[T1]],
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void test() {
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(A().*mptr)();
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}
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}
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