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fddd384b73
Also temporarily remove the assumption from IR gen that we can emit IR for every constant we can fold, since it isn't currently true in C++11, to fix PR11676. Original comment from r147271: constexpr: perform zero-initialization prior to / instead of performing a constructor call when appropriate. Thanks to Eli for spotting this. llvm-svn: 147384
263 lines
6.5 KiB
C++
263 lines
6.5 KiB
C++
// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
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struct A {
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virtual ~A();
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};
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struct B : A { };
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struct C {
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int i;
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B b;
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};
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// CHECK: _Z15test_value_initv
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void test_value_init() {
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// This value initialization requires zero initialization of the 'B'
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// subobject followed by a call to its constructor.
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// PR5800
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// CHECK: store i32 17
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// CHECK: call void @llvm.memset.p0i8.i64
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// CHECK: call void @_ZN1BC1Ev
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C c = { 17 } ;
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// CHECK: call void @_ZN1CD1Ev
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}
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enum enum_type { negative_number = -1, magic_number = 42 };
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class enum_holder
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{
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enum_type m_enum;
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public:
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enum_holder() : m_enum(magic_number) { }
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};
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struct enum_holder_and_int
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{
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enum_holder e;
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int i;
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};
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// CHECK: _Z24test_enum_holder_and_intv()
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void test_enum_holder_and_int() {
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// CHECK: alloca
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// CHECK-NEXT: bitcast
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// CHECK-NEXT: call void @llvm.memset
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// CHECK-NEXT: call void @_ZN19enum_holder_and_intC1Ev
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enum_holder_and_int();
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// CHECK-NEXT: ret void
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}
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// PR7834: don't crash.
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namespace test1 {
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struct A {
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int A::*f;
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A();
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A(const A&);
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A &operator=(const A &);
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};
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struct B {
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A base;
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};
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void foo() {
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B();
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}
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}
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namespace ptrmem {
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struct S {
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int mem1;
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int S::*mem2;
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};
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// CHECK: define i32 @_ZN6ptrmem4testEPNS_1SE
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int test(S *s) {
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
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// CHECK: getelementptr
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// CHECK: ret
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return s->*S().mem2;
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}
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}
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namespace PR9801 {
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struct Test {
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Test() : i(10) {}
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Test(int i) : i(i) {}
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int i;
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private:
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int j;
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};
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struct Test2 {
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Test t;
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};
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struct Test3 : public Test { };
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// CHECK: define void @_ZN6PR98011fEv
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void f() {
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// CHECK-NOT: call void @llvm.memset.p0i8.i64
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// CHECK: call void @_ZN6PR98014TestC1Ei
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// CHECK-NOT: call void @llvm.memset.p0i8.i64
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// CHECK: call void @_ZN6PR98014TestC1Ev
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Test partial[3] = { 1 };
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// CHECK-NOT: call void @llvm.memset.p0i8.i64
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// CHECK: call void @_ZN6PR98014TestC1Ev
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// CHECK-NOT: call void @_ZN6PR98014TestC1Ev
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Test empty[3] = {};
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// CHECK: call void @llvm.memset.p0i8.i64
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// CHECK-NOT: call void @llvm.memset.p0i8.i64
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// CHECK: call void @_ZN6PR98015Test2C1Ev
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// CHECK-NOT: call void @_ZN6PR98015Test2C1Ev
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Test2 empty2[3] = {};
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// CHECK: call void @llvm.memset.p0i8.i64
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// CHECK-NOT: call void @llvm.memset.p0i8.i64
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// CHECK: call void @_ZN6PR98015Test3C1Ev
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// CHECK-NOT: call void @llvm.memset.p0i8.i64
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// CHECK-NOT: call void @_ZN6PR98015Test3C1Ev
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Test3 empty3[3] = {};
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}
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}
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namespace zeroinit {
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struct S { int i; };
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// CHECK: define i32 @_ZN8zeroinit4testEv()
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int test() {
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// CHECK: call void @llvm.memset.p0i8.i64
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// CHECK: ret i32 0
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return S().i;
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}
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struct X0 {
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X0() { }
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int x;
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};
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struct X1 : X0 {
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int x1;
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void f();
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};
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// CHECK: define void @_ZN8zeroinit9testX0_X1Ev
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void testX0_X1() {
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// CHECK: call void @llvm.memset.p0i8.i64
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// CHECK-NEXT: call void @_ZN8zeroinit2X1C1Ev
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// CHECK-NEXT: call void @_ZN8zeroinit2X11fEv
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X1().f();
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}
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template<typename>
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struct X2 : X0 {
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int x2;
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void f();
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};
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template<typename>
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struct X3 : X2<int> {
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X3() : X2<int>() { }
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int i;
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};
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// CHECK: define void @_ZN8zeroinit9testX0_X3Ev
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void testX0_X3() {
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// CHECK-NOT: call void @llvm.memset
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// CHECK: call void @_ZN8zeroinit2X3IiEC1Ev
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// CHECK: call void @_ZN8zeroinit2X2IiE1fEv
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// CHECK-NEXT: ret void
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X3<int>().f();
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}
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// More checks at EOF
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}
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namespace PR8726 {
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class C;
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struct S {
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const C &c1;
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int i;
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const C &c2;
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};
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void f(const C& c) {
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S s = {c, 42, c};
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}
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}
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// rdar://problem/9355931
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namespace test6 {
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struct A { A(); A(int); };
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void test() {
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A arr[10][20] = { 5 };
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};
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// CHECK: define void @_ZN5test64testEv()
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// CHECK: [[ARR:%.*]] = alloca [10 x [20 x [[A:%.*]]]],
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// CHECK-NEXT: [[INNER:%.*]] = getelementptr inbounds [10 x [20 x [[A]]]]* [[ARR]], i64 0, i64 0
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [20 x [[A]]]* [[INNER]], i64 0, i64 0
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// CHECK-NEXT: call void @_ZN5test61AC1Ei([[A]]* [[T0]], i32 5)
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// CHECK-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [[A]]* [[T0]], i64 1
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// CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[T0]], i64 20
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// CHECK-NEXT: br label
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// CHECK: [[CUR:%.*]] = phi [[A]]* [ [[BEGIN]], {{%.*}} ], [ [[NEXT:%.*]], {{%.*}} ]
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// CHECK-NEXT: call void @_ZN5test61AC1Ev([[A]]* [[CUR]])
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// CHECK-NEXT: [[NEXT]] = getelementptr inbounds [[A]]* [[CUR]], i64 1
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// CHECK-NEXT: [[T0:%.*]] = icmp eq [[A]]* [[NEXT]], [[END]]
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// CHECK-NEXT: br i1
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// CHECK: [[BEGIN:%.*]] = getelementptr inbounds [20 x [[A]]]* [[INNER]], i64 1
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// CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [20 x [[A]]]* [[INNER]], i64 10
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// CHECK-NEXT: br label
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// CHECK: [[CUR:%.*]] = phi [20 x [[A]]]* [ [[BEGIN]], {{%.*}} ], [ [[NEXT:%.*]], {{%.*}} ]
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// Inner loop.
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// CHECK-NEXT: [[IBEGIN:%.*]] = getelementptr inbounds [20 x [[A]]]* [[CUR]], i32 0, i32 0
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// CHECK-NEXT: [[IEND:%.*]] = getelementptr inbounds [[A]]* [[IBEGIN]], i64 20
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// CHECK-NEXT: br label
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// CHECK: [[ICUR:%.*]] = phi [[A]]* [ [[IBEGIN]], {{%.*}} ], [ [[INEXT:%.*]], {{%.*}} ]
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// CHECK-NEXT: call void @_ZN5test61AC1Ev([[A]]* [[ICUR]])
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// CHECK-NEXT: [[INEXT:%.*]] = getelementptr inbounds [[A]]* [[ICUR]], i64 1
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// CHECK-NEXT: [[T0:%.*]] = icmp eq [[A]]* [[INEXT]], [[IEND]]
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// CHECK-NEXT: br i1 [[T0]],
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// CHECK: [[NEXT]] = getelementptr inbounds [20 x [[A]]]* [[CUR]], i64 1
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// CHECK-NEXT: [[T0:%.*]] = icmp eq [20 x [[A]]]* [[NEXT]], [[END]]
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// CHECK-NEXT: br i1 [[T0]]
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// CHECK: ret void
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}
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namespace PR11124 {
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// Make sure C::C doesn't overwrite parts of A while it is zero-initializing B
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struct A { int a; A(); A(int); };
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struct B : virtual A { int b; };
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struct C : B { C(); };
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C::C() : A(3), B() {}
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// CHECK: define void @_ZN7PR111241CC1Ev
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// CHECK: call void @llvm.memset.p0i8.i64(i8* {{.*}}, i8 0, i64 12, i32 8, i1 false)
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// CHECK-NEXT: call void @_ZN7PR111241BC2Ev
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// Make sure C::C doesn't overwrite parts of A while it is zero-initializing B
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struct B2 : virtual A { int B::*b; };
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struct C2 : B2 { C2(); };
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C2::C2() : A(3), B2() {}
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// CHECK: define void @_ZN7PR111242C2C1Ev
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* {{.*}}, i64 16, i32 8, i1 false)
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// CHECK-NEXT: call void @_ZN7PR111242B2C2Ev
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}
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// CHECK: define linkonce_odr void @_ZN8zeroinit2X3IiEC2Ev(%"struct.zeroinit::X3"* %this) unnamed_addr
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// CHECK: call void @llvm.memset.p0i8.i64
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// CHECK-NEXT: call void @_ZN8zeroinit2X2IiEC2Ev
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// CHECK-NEXT: ret void
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