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llvm-project/clang/test/CodeGenCXX/temporaries.cpp

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// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin9 | FileCheck %s
struct A {
A();
~A();
void f();
};
void f1() {
// CHECK: call void @_ZN1AC1Ev
// CHECK: call void @_ZN1AD1Ev
(void)A();
// CHECK: call void @_ZN1AC1Ev
// CHECK: call void @_ZN1AD1Ev
A().f();
}
// Function calls
struct B {
B();
~B();
};
B g();
void f2() {
// CHECK-NOT: call void @_ZN1BC1Ev
// CHECK: call void @_ZN1BD1Ev
(void)g();
}
// Member function calls
struct C {
C();
~C();
C f();
};
void f3() {
// CHECK: call void @_ZN1CC1Ev
// CHECK: call void @_ZN1CD1Ev
// CHECK: call void @_ZN1CD1Ev
C().f();
}
// Function call operator
struct D {
D();
~D();
D operator()();
};
void f4() {
// CHECK: call void @_ZN1DC1Ev
// CHECK: call void @_ZN1DD1Ev
// CHECK: call void @_ZN1DD1Ev
D()();
}
// Overloaded operators
struct E {
E();
~E();
E operator+(const E&);
E operator!();
};
void f5() {
// CHECK: call void @_ZN1EC1Ev
// CHECK: call void @_ZN1EC1Ev
// CHECK: call void @_ZN1ED1Ev
// CHECK: call void @_ZN1ED1Ev
// CHECK: call void @_ZN1ED1Ev
E() + E();
// CHECK: call void @_ZN1EC1Ev
// CHECK: call void @_ZN1ED1Ev
// CHECK: call void @_ZN1ED1Ev
!E();
}
struct F {
F();
~F();
F& f();
};
void f6() {
// CHECK: call void @_ZN1FC1Ev
// CHECK: call void @_ZN1FD1Ev
F().f();
}
struct G {
G();
G(A);
~G();
operator A();
};
void a(const A&);
void f7() {
// CHECK: call void @_ZN1AC1Ev
// CHECK: call void @_Z1aRK1A
// CHECK: call void @_ZN1AD1Ev
a(A());
// CHECK: call void @_ZN1GC1Ev
// CHECK: call void @_ZN1Gcv1AEv
// CHECK: call void @_Z1aRK1A
// CHECK: call void @_ZN1AD1Ev
// CHECK: call void @_ZN1GD1Ev
a(G());
}
namespace PR5077 {
struct A {
A();
~A();
int f();
};
void f();
int g(const A&);
struct B {
int a1;
int a2;
B();
~B();
};
B::B()
// CHECK: call void @_ZN6PR50771AC1Ev
// CHECK: call i32 @_ZN6PR50771A1fEv
// CHECK: call void @_ZN6PR50771AD1Ev
: a1(A().f())
// CHECK: call void @_ZN6PR50771AC1Ev
// CHECK: call i32 @_ZN6PR50771gERKNS_1AE
// CHECK: call void @_ZN6PR50771AD1Ev
, a2(g(A()))
{
// CHECK: call void @_ZN6PR50771fEv
f();
}
struct C {
C();
const B& b;
};
C::C()
// CHECK: call void @_ZN6PR50771BC1Ev
: b(B()) {
// CHECK: call void @_ZN6PR50771fEv
f();
// CHECK: call void @_ZN6PR50771BD1Ev
}
}
A f8() {
// CHECK: call void @_ZN1AC1Ev
// CHECK-NOT: call void @_ZN1AD1Ev
return A();
// CHECK: ret void
}
struct H {
H();
~H();
H(const H&);
};
void f9(H h) {
// CHECK: call void @_ZN1HC1Ev
// CHECK: call void @_Z2f91H
// CHECK: call void @_ZN1HD1Ev
f9(H());
// CHECK: call void @_ZN1HC1ERKS_
// CHECK: call void @_Z2f91H
// CHECK: call void @_ZN1HD1Ev
f9(h);
}
void f10(const H&);
void f11(H h) {
// CHECK: call void @_ZN1HC1Ev
// CHECK: call void @_Z3f10RK1H
// CHECK: call void @_ZN1HD1Ev
f10(H());
// CHECK: call void @_Z3f10RK1H
// CHECK-NOT: call void @_ZN1HD1Ev
// CHECK: ret void
f10(h);
}
// PR5808
struct I {
I(const char *);
~I();
};
// CHECK: _Z3f12v
I f12() {
// CHECK: call void @_ZN1IC1EPKc
// CHECK-NOT: call void @_ZN1ID1Ev
// CHECK: ret void
return "Hello";
}
// PR5867
namespace PR5867 {
struct S {
S();
S(const S &);
~S();
};
void f(S, int);
// CHECK: define void @_ZN6PR58671gEv
void g() {
// CHECK: call void @_ZN6PR58671SC1Ev
// CHECK-NEXT: call void @_ZN6PR58671fENS_1SEi
// CHECK-NEXT: call void @_ZN6PR58671SD1Ev
// CHECK-NEXT: ret void
(f)(S(), 0);
}
// CHECK: define linkonce_odr void @_ZN6PR58672g2IiEEvT_
template<typename T>
void g2(T) {
// CHECK: call void @_ZN6PR58671SC1Ev
// CHECK-NEXT: call void @_ZN6PR58671fENS_1SEi
// CHECK-NEXT: call void @_ZN6PR58671SD1Ev
// CHECK-NEXT: ret void
(f)(S(), 0);
}
void h() {
g2(17);
}
}
// PR6199
namespace PR6199 {
struct A { ~A(); };
struct B { operator A(); };
// CHECK: define weak_odr void @_ZN6PR61992f2IiEENS_1AET_
template<typename T> A f2(T) {
B b;
// CHECK: call void @_ZN6PR61991BcvNS_1AEEv
// CHECK-NEXT: ret void
return b;
}
template A f2<int>(int);
}
namespace T12 {
struct A {
A();
~A();
int f();
};
int& f(int);
// CHECK: define void @_ZN3T121gEv
void g() {
// CHECK: call void @_ZN3T121AC1Ev
// CHECK-NEXT: call i32 @_ZN3T121A1fEv(
// CHECK-NEXT: call i32* @_ZN3T121fEi(
// CHECK-NEXT: call void @_ZN3T121AD1Ev(
int& i = f(A().f());
}
}
namespace PR6648 {
struct B {
~B();
};
B foo;
struct D;
D& zed(B);
void foobar() {
// CHECK: call %"struct.PR6648::D"* @_ZN6PR66483zedENS_1BE
zed(foo);
}
}
namespace UserConvertToValue {
struct X {
X(int);
X(const X&);
~X();
};
void f(X);
// CHECK: void @_ZN18UserConvertToValue1gEv()
void g() {
// CHECK: call void @_ZN18UserConvertToValue1XC1Ei
// CHECK: call void @_ZN18UserConvertToValue1fENS_1XE
// CHECK: call void @_ZN18UserConvertToValue1XD1Ev
// CHECK: ret void
f(1);
}
}
namespace PR7556 {
struct A { ~A(); };
struct B { int i; ~B(); };
struct C { int C::*pm; ~C(); };
// CHECK: define void @_ZN6PR75563fooEv()
void foo() {
// CHECK: call void @_ZN6PR75561AD1Ev
A();
// CHECK: call void @llvm.memset.p0i8.i64
// CHECK: call void @_ZN6PR75561BD1Ev
B();
// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
// CHECK: call void @_ZN6PR75561CD1Ev
C();
// CHECK-NEXT: ret void
}
}
namespace Elision {
struct A {
A(); A(const A &); ~A();
void *p;
void foo() const;
};
void foo();
A fooA();
void takeA(A a);
// CHECK: define void @_ZN7Elision5test0Ev()
void test0() {
// CHECK: [[I:%.*]] = alloca [[A:%.*]], align 8
// CHECK-NEXT: [[J:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[T0:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[K:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[T1:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: call void @_ZN7Elision3fooEv()
// CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[I]])
A i = (foo(), A());
// CHECK-NEXT: call void @_ZN7Elision4fooAEv([[A]]* sret [[T0]])
// CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[J]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[T0]])
A j = (fooA(), A());
// CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[T1]])
// CHECK-NEXT: call void @_ZN7Elision4fooAEv([[A]]* sret [[K]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[T1]])
A k = (A(), fooA());
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[K]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[J]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[I]])
}
// CHECK: define void @_ZN7Elision5test1EbNS_1AE(
void test1(bool c, A x) {
// CHECK: [[I:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[J:%.*]] = alloca [[A]], align 8
// CHECK: call void @_ZN7Elision1AC1Ev([[A]]* [[I]])
// CHECK: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[I]], [[A]]* [[X:%.*]])
A i = (c ? A() : x);
// CHECK: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[J]], [[A]]* [[X]])
// CHECK: call void @_ZN7Elision1AC1Ev([[A]]* [[J]])
A j = (c ? x : A());
// CHECK: call void @_ZN7Elision1AD1Ev([[A]]* [[J]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[I]])
}
// CHECK: define void @_ZN7Elision5test2Ev([[A]]* noalias sret
A test2() {
// CHECK: call void @_ZN7Elision3fooEv()
// CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[RET:%.*]])
// CHECK-NEXT: ret void
return (foo(), A());
}
// CHECK: define void @_ZN7Elision5test3EiNS_1AE([[A]]* noalias sret
A test3(int v, A x) {
if (v < 5)
// CHECK: call void @_ZN7Elision1AC1Ev([[A]]* [[RET:%.*]])
// CHECK: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET]], [[A]]* [[X:%.*]])
return (v < 0 ? A() : x);
else
// CHECK: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET]], [[A]]* [[X]])
// CHECK: call void @_ZN7Elision1AC1Ev([[A]]* [[RET]])
return (v > 10 ? x : A());
// CHECK: ret void
}
// CHECK: define void @_ZN7Elision5test4Ev()
void test4() {
// CHECK: [[X:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[XS:%.*]] = alloca [2 x [[A]]], align 16
// CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[X]])
A x;
// CHECK-NEXT: [[XS0:%.*]] = getelementptr inbounds [2 x [[A]]]* [[XS]], i64 0, i64 0
// CHECK-NEXT: call void @_ZN7Elision1AC1Ev([[A]]* [[XS0]])
// CHECK-NEXT: [[XS1:%.*]] = getelementptr inbounds [[A]]* [[XS0]], i64 1
// CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[XS1]], [[A]]* [[X]])
A xs[] = { A(), x };
// CHECK-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [2 x [[A]]]* [[XS]], i32 0, i32 0
// CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 2
// CHECK-NEXT: br label
// CHECK: [[AFTER:%.*]] = phi [[A]]*
// CHECK-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]]* [[AFTER]], i64 -1
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[CUR]])
// CHECK-NEXT: [[T0:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
// CHECK-NEXT: br i1 [[T0]],
// CHECK: call void @_ZN7Elision1AD1Ev([[A]]* [[X]])
}
// rdar://problem/8433352
// CHECK: define void @_ZN7Elision5test5Ev([[A]]* noalias sret
struct B { A a; B(); };
A test5() {
// CHECK: [[AT0:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[BT0:%.*]] = alloca [[B:%.*]], align 8
// CHECK-NEXT: [[X:%.*]] = alloca [[A]], align 8
// CHECK-NEXT: [[BT1:%.*]] = alloca [[B]], align 8
// CHECK-NEXT: [[BT2:%.*]] = alloca [[B]], align 8
// CHECK: call void @_ZN7Elision1BC1Ev([[B]]* [[BT0]])
// CHECK-NEXT: [[AM:%.*]] = getelementptr inbounds [[B]]* [[BT0]], i32 0, i32 0
// CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[AT0]], [[A]]* [[AM]])
// CHECK-NEXT: call void @_ZN7Elision5takeAENS_1AE([[A]]* [[AT0]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[AT0]])
// CHECK-NEXT: call void @_ZN7Elision1BD1Ev([[B]]* [[BT0]])
takeA(B().a);
// CHECK-NEXT: call void @_ZN7Elision1BC1Ev([[B]]* [[BT1]])
// CHECK-NEXT: [[AM:%.*]] = getelementptr inbounds [[B]]* [[BT1]], i32 0, i32 0
// CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[X]], [[A]]* [[AM]])
// CHECK-NEXT: call void @_ZN7Elision1BD1Ev([[B]]* [[BT1]])
A x = B().a;
// CHECK-NEXT: call void @_ZN7Elision1BC1Ev([[B]]* [[BT2]])
// CHECK-NEXT: [[AM:%.*]] = getelementptr inbounds [[B]]* [[BT2]], i32 0, i32 0
// CHECK-NEXT: call void @_ZN7Elision1AC1ERKS0_([[A]]* [[RET:%.*]], [[A]]* [[AM]])
// CHECK-NEXT: call void @_ZN7Elision1BD1Ev([[B]]* [[BT2]])
return B().a;
// CHECK: call void @_ZN7Elision1AD1Ev([[A]]* [[X]])
}
// Reduced from webkit.
// CHECK: define void @_ZN7Elision5test6EPKNS_1CE([[C:%.*]]*
struct C { operator A() const; };
void test6(const C *x) {
// CHECK: [[T0:%.*]] = alloca [[A]], align 8
// CHECK: [[X:%.*]] = load [[C]]** {{%.*}}, align 8
// CHECK-NEXT: call void @_ZNK7Elision1CcvNS_1AEEv([[A]]* sret [[T0]], [[C]]* [[X]])
// CHECK-NEXT: call void @_ZNK7Elision1A3fooEv([[A]]* [[T0]])
// CHECK-NEXT: call void @_ZN7Elision1AD1Ev([[A]]* [[T0]])
// CHECK-NEXT: ret void
A(*x).foo();
}
}
namespace PR8623 {
struct A { A(int); ~A(); };
// CHECK: define void @_ZN6PR86233fooEb(
void foo(bool b) {
// CHECK: [[TMP:%.*]] = alloca [[A:%.*]], align 1
// CHECK-NEXT: [[LCONS:%.*]] = alloca i1
// CHECK-NEXT: [[RCONS:%.*]] = alloca i1
// CHECK: store i1 false, i1* [[LCONS]]
// CHECK-NEXT: store i1 false, i1* [[RCONS]]
// CHECK-NEXT: br i1
// CHECK: call void @_ZN6PR86231AC1Ei([[A]]* [[TMP]], i32 2)
// CHECK-NEXT: store i1 true, i1* [[LCONS]]
// CHECK-NEXT: br label
// CHECK: call void @_ZN6PR86231AC1Ei([[A]]* [[TMP]], i32 3)
// CHECK-NEXT: store i1 true, i1* [[RCONS]]
// CHECK-NEXT: br label
// CHECK: load i1* [[RCONS]]
// CHECK-NEXT: br i1
// CHECK: call void @_ZN6PR86231AD1Ev([[A]]* [[TMP]])
// CHECK-NEXT: br label
// CHECK: load i1* [[LCONS]]
// CHECK-NEXT: br i1
// CHECK: call void @_ZN6PR86231AD1Ev([[A]]* [[TMP]])
// CHECK-NEXT: br label
// CHECK: ret void
b ? A(2) : A(3);
}
}
namespace PR11365 {
struct A { A(); ~A(); };
// CHECK: define void @_ZN7PR113653fooEv(
void foo() {
// CHECK: [[BEGIN:%.*]] = getelementptr inbounds [3 x [[A:%.*]]]* {{.*}}, i32 0, i32 0
// CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 3
// CHECK-NEXT: br label
// CHECK: [[PHI:%.*]] = phi
// CHECK-NEXT: [[ELEM:%.*]] = getelementptr inbounds [[A]]* [[PHI]], i64 -1
// CHECK-NEXT: call void @_ZN7PR113651AD1Ev([[A]]* [[ELEM]])
// CHECK-NEXT: icmp eq [[A]]* [[ELEM]], [[BEGIN]]
// CHECK-NEXT: br i1
(void) (A [3]) {};
}
}
namespace AssignmentOp {
struct A { ~A(); };
struct B { A operator=(const B&); };
struct C : B { B b1, b2; };
// CHECK: define void @_ZN12AssignmentOp1fE
void f(C &c1, const C &c2) {
// CHECK: call {{.*}} @_ZN12AssignmentOp1CaSERKS0_(
c1 = c2;
}
// Ensure that each 'A' temporary is destroyed before the next subobject is
// copied.
// CHECK: define {{.*}} @_ZN12AssignmentOp1CaSERKS0_(
// CHECK: call {{.*}} @_ZN12AssignmentOp1BaSERKS
// CHECK: call {{.*}} @_ZN12AssignmentOp1AD1Ev(
// CHECK: call {{.*}} @_ZN12AssignmentOp1BaSERKS
// CHECK: call {{.*}} @_ZN12AssignmentOp1AD1Ev(
// CHECK: call {{.*}} @_ZN12AssignmentOp1BaSERKS
// CHECK: call {{.*}} @_ZN12AssignmentOp1AD1Ev(
}
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