| // RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -emit-llvm -o - | FileCheck %s |
| #include <stddef.h> |
| |
| void t1() { |
| int* a = new int; |
| } |
| |
| // Placement. |
| void* operator new(size_t, 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 |
| } |