340 lines
8.6 KiB
C++
340 lines
8.6 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -emit-llvm -o - | FileCheck %s
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typedef __typeof__(sizeof(0)) size_t;
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// Ensure that this declaration doesn't cause operator new to lose its
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// 'noalias' attribute.
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void *operator new[](size_t);
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void t1() {
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delete new int;
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delete [] new int [3];
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}
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// CHECK: declare noalias i8* @_Znwm(i64) [[ATTR_NOBUILTIN:#[^ ]*]]
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// CHECK: declare void @_ZdlPv(i8*) [[ATTR_NOBUILTIN_NOUNWIND:#[^ ]*]]
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// CHECK: declare noalias i8* @_Znam(i64) [[ATTR_NOBUILTIN]]
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// CHECK: declare void @_ZdaPv(i8*) [[ATTR_NOBUILTIN_NOUNWIND]]
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namespace std {
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struct nothrow_t {};
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}
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std::nothrow_t nothrow;
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// Declare the reserved placement operators.
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void *operator new(size_t, void*) throw();
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void operator delete(void*, void*) throw();
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void *operator new[](size_t, void*) throw();
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void operator delete[](void*, void*) throw();
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// Declare the replaceable global allocation operators.
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void *operator new(size_t, const std::nothrow_t &) throw();
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void *operator new[](size_t, const std::nothrow_t &) throw();
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void operator delete(void *, const std::nothrow_t &) throw();
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void operator delete[](void *, const std::nothrow_t &) throw();
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void t2(int* a) {
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int* b = new (a) int;
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}
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struct S {
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int a;
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};
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// POD types.
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void t3() {
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int *a = new int(10);
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_Complex int* b = new _Complex int(10i);
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S s;
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s.a = 10;
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S *sp = new S(s);
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}
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// Non-POD
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struct T {
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T();
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int a;
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};
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void t4() {
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// CHECK: call void @_ZN1TC1Ev
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T *t = new T;
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}
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struct T2 {
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int a;
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T2(int, int);
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};
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void t5() {
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// CHECK: call void @_ZN2T2C1Eii
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T2 *t2 = new T2(10, 10);
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}
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int *t6() {
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// Null check.
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return new (0) int(10);
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}
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void t7() {
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new int();
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}
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struct U {
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~U();
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};
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void t8(int n) {
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new int[10];
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new int[n];
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// Non-POD
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new T[10];
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new T[n];
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// Cookie required
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new U[10];
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new U[n];
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}
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void t9() {
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bool b;
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new bool(true);
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new (&b) bool(true);
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}
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struct A {
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void* operator new(__typeof(sizeof(int)), int, float, ...);
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A();
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};
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A* t10() {
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// CHECK: @_ZN1AnwEmifz
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return new(1, 2, 3.45, 100) A;
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}
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// CHECK-LABEL: define void @_Z3t11i
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struct B { int a; };
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struct Bmemptr { int Bmemptr::* memptr; int a; };
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void t11(int n) {
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// CHECK: call noalias i8* @_Znwm
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// CHECK: call void @llvm.memset.p0i8.i64(
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B* b = new B();
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// CHECK: call noalias i8* @_Znam
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// CHECK: {{call void.*llvm.memset.p0i8.i64.*i8 0, i64 %}}
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B *b2 = new B[n]();
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// CHECK: call noalias i8* @_Znam
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
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// CHECK: br
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Bmemptr *b_memptr = new Bmemptr[n]();
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// CHECK: ret void
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}
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struct Empty { };
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// We don't need to initialize an empty class.
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// CHECK-LABEL: define void @_Z3t12v
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void t12() {
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// CHECK: call noalias i8* @_Znam
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// CHECK-NOT: br
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(void)new Empty[10];
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// CHECK: call noalias i8* @_Znam
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// CHECK-NOT: br
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(void)new Empty[10]();
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// CHECK: ret void
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}
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// Zero-initialization
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// CHECK-LABEL: define void @_Z3t13i
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void t13(int n) {
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// CHECK: call noalias i8* @_Znwm
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// CHECK: store i32 0, i32*
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(void)new int();
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// CHECK: call noalias i8* @_Znam
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// CHECK: {{call void.*llvm.memset.p0i8.i64.*i8 0, i64 %}}
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(void)new int[n]();
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// CHECK-NEXT: ret void
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}
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struct Alloc{
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int x;
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void* operator new[](size_t size);
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void operator delete[](void* p);
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~Alloc();
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};
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void f() {
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// CHECK: call i8* @_ZN5AllocnaEm(i64 808)
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// CHECK: store i64 200
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// CHECK: call void @_ZN5AllocD1Ev(
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// CHECK: call void @_ZN5AllocdaEPv(i8*
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delete[] new Alloc[10][20];
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// CHECK: call noalias i8* @_Znwm
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// CHECK: call void @_ZdlPv(i8*
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delete new bool;
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// CHECK: ret void
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}
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namespace test15 {
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struct A { A(); ~A(); };
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// CHECK-LABEL: define void @_ZN6test155test0EPv(
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// CHECK: [[P:%.*]] = load i8*
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// CHECK-NEXT: icmp eq i8* [[P]], null
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// CHECK-NEXT: br i1
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// CHECK: [[T0:%.*]] = bitcast i8* [[P]] to [[A:%.*]]*
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// CHECK-NEXT: call void @_ZN6test151AC1Ev([[A]]* [[T0]])
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void test0(void *p) {
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new (p) A();
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}
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// CHECK-LABEL: define void @_ZN6test155test1EPv(
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// CHECK: [[P:%.*]] = load i8**
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// CHECK-NEXT: icmp eq i8* [[P]], null
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// CHECK-NEXT: br i1
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// CHECK: [[BEGIN:%.*]] = bitcast i8* [[P]] to [[A:%.*]]*
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// CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 5
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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 @_ZN6test151AC1Ev([[A]]* [[CUR]])
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// CHECK-NEXT: [[NEXT]] = getelementptr inbounds [[A]]* [[CUR]], i64 1
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// CHECK-NEXT: [[DONE:%.*]] = icmp eq [[A]]* [[NEXT]], [[END]]
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// CHECK-NEXT: br i1 [[DONE]]
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void test1(void *p) {
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new (p) A[5];
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}
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// TODO: it's okay if all these size calculations get dropped.
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// FIXME: maybe we should try to throw on overflow?
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// CHECK-LABEL: define void @_ZN6test155test2EPvi(
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// CHECK: [[N:%.*]] = load i32*
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// CHECK-NEXT: [[T0:%.*]] = sext i32 [[N]] to i64
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// CHECK-NEXT: [[T1:%.*]] = icmp slt i64 [[T0]], 0
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// CHECK-NEXT: [[T2:%.*]] = select i1 [[T1]], i64 -1, i64 [[T0]]
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// CHECK-NEXT: [[P:%.*]] = load i8*
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// CHECK-NEXT: icmp eq i8* [[P]], null
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// CHECK-NEXT: br i1
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// CHECK: [[BEGIN:%.*]] = bitcast i8* [[P]] to [[A:%.*]]*
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// CHECK-NEXT: [[ISEMPTY:%.*]] = icmp eq i64 [[T0]], 0
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// CHECK-NEXT: br i1 [[ISEMPTY]],
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// CHECK: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 [[T0]]
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// CHECK-NEXT: br label
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// CHECK: [[CUR:%.*]] = phi [[A]]* [ [[BEGIN]],
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// CHECK-NEXT: call void @_ZN6test151AC1Ev([[A]]* [[CUR]])
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void test2(void *p, int n) {
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new (p) A[n];
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}
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}
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namespace PR10197 {
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// CHECK-LABEL: define weak_odr void @_ZN7PR101971fIiEEvv()
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template<typename T>
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void f() {
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// CHECK: [[CALL:%.*]] = call noalias i8* @_Znwm
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// CHECK-NEXT: [[CASTED:%.*]] = bitcast i8* [[CALL]] to
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new T;
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// CHECK-NEXT: ret void
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}
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template void f<int>();
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}
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namespace PR11523 {
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class MyClass;
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typedef int MyClass::* NewTy;
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// CHECK-LABEL: define i64* @_ZN7PR115231fEv
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// CHECK: store i64 -1
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NewTy* f() { return new NewTy[2](); }
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}
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namespace PR11757 {
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// Make sure we elide the copy construction.
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struct X { X(); X(const X&); };
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X* a(X* x) { return new X(X()); }
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// CHECK: define {{.*}} @_ZN7PR117571aEPNS_1XE
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// CHECK: [[CALL:%.*]] = call noalias i8* @_Znwm
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// CHECK-NEXT: [[CASTED:%.*]] = bitcast i8* [[CALL]] to
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// CHECK-NEXT: call void @_ZN7PR117571XC1Ev({{.*}}* [[CASTED]])
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// CHECK-NEXT: ret {{.*}} [[CASTED]]
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}
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namespace PR13380 {
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struct A { A() {} };
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struct B : public A { int x; };
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// CHECK-LABEL: define i8* @_ZN7PR133801fEv
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// CHECK: call noalias i8* @_Znam(
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// CHECK: call void @llvm.memset.p0i8
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// CHECK-NEXT: call void @_ZN7PR133801BC1Ev
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void* f() { return new B[2](); }
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}
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struct MyPlacementType {} mpt;
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void *operator new(size_t, MyPlacementType);
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namespace N3664 {
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struct S { S() throw(int); };
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// CHECK-LABEL-LABEL: define void @_ZN5N36641fEv
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void f() {
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// CHECK: call noalias i8* @_Znwm(i64 4) [[ATTR_BUILTIN_NEW:#[^ ]*]]
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int *p = new int;
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// CHECK: call void @_ZdlPv({{.*}}) [[ATTR_BUILTIN_DELETE:#[^ ]*]]
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delete p;
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// CHECK: call noalias i8* @_Znam(i64 12) [[ATTR_BUILTIN_NEW]]
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int *q = new int[3];
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// CHECK: call void @_ZdaPv({{.*}}) [[ATTR_BUILTIN_DELETE]]
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delete [] p;
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// CHECK: call i8* @_ZnamRKSt9nothrow_t(i64 3, {{.*}}) [[ATTR_BUILTIN_NOTHROW_NEW:#[^ ]*]]
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(void) new (nothrow) S[3];
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// CHECK: call i8* @_Znwm15MyPlacementType(i64 4){{$}}
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(void) new (mpt) int;
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}
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// FIXME: Can we mark this noalias?
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// CHECK: declare i8* @_ZnamRKSt9nothrow_t(i64, {{.*}}) [[ATTR_NOBUILTIN_NOUNWIND]]
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// CHECK-LABEL-LABEL: define void @_ZN5N36641gEv
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void g() {
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// It's OK for there to be attributes here, so long as we don't have a
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// 'builtin' attribute.
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// CHECK: call noalias i8* @_Znwm(i64 4){{$}}
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int *p = (int*)operator new(4);
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// CHECK: call void @_ZdlPv({{.*}}) [[ATTR_NOUNWIND:#[^ ]*]]
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operator delete(p);
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// CHECK: call noalias i8* @_Znam(i64 12){{$}}
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int *q = (int*)operator new[](12);
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// CHECK: call void @_ZdaPv({{.*}}) [[ATTR_NOUNWIND]]
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operator delete [](p);
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// CHECK: call i8* @_ZnamRKSt9nothrow_t(i64 3, {{.*}}) [[ATTR_NOUNWIND]]
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(void) operator new[](3, nothrow);
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}
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}
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// CHECK-DAG: attributes [[ATTR_NOBUILTIN]] = {{[{].*}} nobuiltin {{.*[}]}}
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// CHECK-DAG: attributes [[ATTR_NOBUILTIN_NOUNWIND]] = {{[{].*}} nobuiltin nounwind {{.*[}]}}
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// CHECK: attributes [[ATTR_NOUNWIND]] =
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// CHECK-NOT: builtin
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// CHECK-NOT: attributes
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// CHECK: nounwind
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// CHECK-NOT: builtin
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// CHECK: attributes
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// CHECK-DAG: attributes [[ATTR_BUILTIN_NEW]] = {{[{].*}} builtin {{.*[}]}}
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// CHECK-DAG: attributes [[ATTR_BUILTIN_DELETE]] = {{[{].*}} builtin {{.*[}]}}
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