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// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -emit-llvm -o - | FileCheck %s
typedef __typeof__(sizeof(0)) size_t;
void t1() {
int* a = new int;
}
// Declare the reserved placement operators.
void *operator new(size_t, void*) throw();
void operator delete(void*, void*) throw();
void *operator new[](size_t, void*) throw();
void operator delete[](void*, void*) throw();
void t2(int* a) {
int* b = new (a) int;
}
struct S {
int a;
};
// POD types.
void t3() {
int *a = new int(10);
_Complex int* b = new _Complex int(10i);
S s;
s.a = 10;
S *sp = new S(s);
}
// Non-POD
struct T {
T();
int a;
};
void t4() {
// CHECK: call void @_ZN1TC1Ev
T *t = new T;
}
struct T2 {
int a;
T2(int, int);
};
void t5() {
// CHECK: call void @_ZN2T2C1Eii
T2 *t2 = new T2(10, 10);
}
int *t6() {
// Null check.
return new (0) int(10);
}
void t7() {
new int();
}
struct U {
~U();
};
void t8(int n) {
new int[10];
new int[n];
// Non-POD
new T[10];
new T[n];
// Cookie required
new U[10];
new U[n];
}
// noalias
// CHECK: declare noalias i8* @_Znam
void *operator new[](size_t);
void t9() {
bool b;
new bool(true);
new (&b) bool(true);
}
struct A {
void* operator new(__typeof(sizeof(int)), int, float, ...);
A();
};
A* t10() {
// CHECK: @_ZN1AnwEmifz
return new(1, 2, 3.45, 100) A;
}
// CHECK: define void @_Z3t11i
struct B { int a; };
struct Bmemptr { int Bmemptr::* memptr; int a; };
void t11(int n) {
// CHECK: call noalias i8* @_Znwm
// CHECK: call void @llvm.memset.p0i8.i64(
B* b = new B();
// CHECK: call noalias i8* @_Znam
// CHECK: {{call void.*llvm.memset.p0i8.i64.*i8 0, i64 %}}
B *b2 = new B[n]();
// CHECK: call noalias i8* @_Znam
// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
// CHECK: br
Bmemptr *b_memptr = new Bmemptr[n]();
// CHECK: ret void
}
struct Empty { };
// We don't need to initialize an empty class.
// CHECK: define void @_Z3t12v
void t12() {
// CHECK: call noalias i8* @_Znam
// CHECK-NOT: br
(void)new Empty[10];
// CHECK: call noalias i8* @_Znam
// CHECK-NOT: br
(void)new Empty[10]();
// CHECK: ret void
}
// Zero-initialization
// CHECK: define void @_Z3t13i
void t13(int n) {
// CHECK: call noalias i8* @_Znwm
// CHECK: store i32 0, i32*
(void)new int();
// CHECK: call noalias i8* @_Znam
// CHECK: {{call void.*llvm.memset.p0i8.i64.*i8 0, i64 %}}
(void)new int[n]();
// CHECK-NEXT: ret void
}
struct Alloc{
int x;
void* operator new[](size_t size);
void operator delete[](void* p);
~Alloc();
};
void f() {
// CHECK: call i8* @_ZN5AllocnaEm(i64 808)
// CHECK: store i64 200
// CHECK: call void @_ZN5AllocD1Ev(
// CHECK: call void @_ZN5AllocdaEPv(i8*
delete[] new Alloc[10][20];
// CHECK: call noalias i8* @_Znwm
// CHECK: call void @_ZdlPv(i8*
delete new bool;
// CHECK: ret void
}
namespace test15 {
struct A { A(); ~A(); };
// CHECK: define void @_ZN6test155test0EPv(
// CHECK: [[P:%.*]] = load i8*
// CHECK-NEXT: icmp eq i8* [[P]], null
// CHECK-NEXT: br i1
// CHECK: [[T0:%.*]] = bitcast i8* [[P]] to [[A:%.*]]*
// CHECK-NEXT: call void @_ZN6test151AC1Ev([[A]]* [[T0]])
void test0(void *p) {
new (p) A();
}
// CHECK: define void @_ZN6test155test1EPv(
// CHECK: [[P:%.*]] = load i8**
// CHECK-NEXT: icmp eq i8* [[P]], null
// CHECK-NEXT: br i1
// CHECK: [[BEGIN:%.*]] = bitcast i8* [[P]] to [[A:%.*]]*
// CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 5
// CHECK-NEXT: br label
// CHECK: [[CUR:%.*]] = phi [[A]]* [ [[BEGIN]], {{%.*}} ], [ [[NEXT:%.*]], {{%.*}} ]
// CHECK-NEXT: call void @_ZN6test151AC1Ev([[A]]* [[CUR]])
// CHECK-NEXT: [[NEXT]] = getelementptr inbounds [[A]]* [[CUR]], i64 1
// CHECK-NEXT: [[DONE:%.*]] = icmp eq [[A]]* [[NEXT]], [[END]]
// CHECK-NEXT: br i1 [[DONE]]
void test1(void *p) {
new (p) A[5];
}
// TODO: it's okay if all these size calculations get dropped.
// FIXME: maybe we should try to throw on overflow?
// CHECK: define void @_ZN6test155test2EPvi(
// CHECK: [[N:%.*]] = load i32*
// CHECK-NEXT: [[T0:%.*]] = sext i32 [[N]] to i64
// CHECK-NEXT: [[T1:%.*]] = icmp slt i64 [[T0]], 0
// CHECK-NEXT: [[T2:%.*]] = select i1 [[T1]], i64 -1, i64 [[T0]]
// CHECK-NEXT: [[P:%.*]] = load i8*
// CHECK-NEXT: icmp eq i8* [[P]], null
// CHECK-NEXT: br i1
// CHECK: [[BEGIN:%.*]] = bitcast i8* [[P]] to [[A:%.*]]*
// CHECK-NEXT: [[ISEMPTY:%.*]] = icmp eq i64 [[T0]], 0
// CHECK-NEXT: br i1 [[ISEMPTY]],
// CHECK: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 [[T0]]
// CHECK-NEXT: br label
// CHECK: [[CUR:%.*]] = phi [[A]]* [ [[BEGIN]],
// CHECK-NEXT: call void @_ZN6test151AC1Ev([[A]]* [[CUR]])
void test2(void *p, int n) {
new (p) A[n];
}
}
namespace PR10197 {
// CHECK: define weak_odr void @_ZN7PR101971fIiEEvv()
template<typename T>
void f() {
// CHECK: [[CALL:%.*]] = call noalias i8* @_Znwm
// CHECK-NEXT: [[CASTED:%.*]] = bitcast i8* [[CALL]] to
new T;
// CHECK-NEXT: ret void
}
template void f<int>();
}
namespace PR11523 {
class MyClass;
typedef int MyClass::* NewTy;
// CHECK: define i64* @_ZN7PR115231fEv
// CHECK: store i64 -1
NewTy* f() { return new NewTy[2](); }
}
namespace PR11757 {
// Make sure we elide the copy construction.
struct X { X(); X(const X&); };
X* a(X* x) { return new X(X()); }
// CHECK: define {{.*}} @_ZN7PR117571aEPNS_1XE
// CHECK: [[CALL:%.*]] = call noalias i8* @_Znwm
// CHECK-NEXT: [[CASTED:%.*]] = bitcast i8* [[CALL]] to
// CHECK-NEXT: call void @_ZN7PR117571XC1Ev({{.*}}* [[CASTED]])
// CHECK-NEXT: ret {{.*}} [[CASTED]]
}
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