205 lines
6.5 KiB
C++
205 lines
6.5 KiB
C++
// RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm -fexceptions %s -o - |FileCheck %s
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// RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm %s -o - |FileCheck -check-prefix CHECK-NOEXC %s
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struct A {
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A();
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~A();
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};
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struct B { B(); ~B(); };
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struct C { void *field; };
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struct D { ~D(); };
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// CHECK: @__dso_handle = external unnamed_addr global i8
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// CHECK: @c = global %struct.C zeroinitializer, align 8
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// It's okay if we ever implement the IR-generation optimization to remove this.
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// CHECK: @_ZN5test3L3varE = internal constant i8* getelementptr inbounds ([7 x i8]*
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// PR6205: The casts should not require global initializers
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// CHECK: @_ZN6PR59741cE = external global %"struct.PR5974::C"
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// CHECK: @_ZN6PR59741aE = global %"struct.PR5974::A"* getelementptr inbounds (%"struct.PR5974::C"* @_ZN6PR59741cE, i32 0, i32 0)
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// CHECK: @_ZN6PR59741bE = global %"struct.PR5974::B"* bitcast (i8* getelementptr (i8* bitcast (%"struct.PR5974::C"* @_ZN6PR59741cE to i8*), i64 4) to %"struct.PR5974::B"*), align 8
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// CHECK: call void @_ZN1AC1Ev(%struct.A* @a)
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// CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.A*)* @_ZN1AD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.A* @a, i32 0, i32 0), i8* @__dso_handle)
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A a;
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// CHECK: call void @_ZN1BC1Ev(%struct.B* @b)
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// CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.B*)* @_ZN1BD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.B* @b, i32 0, i32 0), i8* @__dso_handle)
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B b;
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// PR6205: this should not require a global initializer
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// CHECK-NOT: call void @_ZN1CC1Ev(%struct.C* @c)
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C c;
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// CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.D*)* @_ZN1DD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.D* @d, i32 0, i32 0), i8* @__dso_handle)
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D d;
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// <rdar://problem/7458115>
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namespace test1 {
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int f();
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const int x = f(); // This has side-effects and gets emitted immediately.
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const int y = x - 1; // This gets deferred.
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const int z = ~y; // This also gets deferred, but gets "undeferred" before y.
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int test() { return z; }
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// CHECK-LABEL: define i32 @_ZN5test14testEv()
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// All of these initializers end up delayed, so we check them later.
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}
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// <rdar://problem/8246444>
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namespace test2 {
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struct allocator { allocator(); ~allocator(); };
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struct A { A(const allocator &a = allocator()); ~A(); };
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A a;
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// CHECK: call void @_ZN5test29allocatorC1Ev(
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// CHECK: invoke void @_ZN5test21AC1ERKNS_9allocatorE(
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// CHECK: call void @_ZN5test29allocatorD1Ev(
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// CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test21AD1Ev {{.*}} @_ZN5test21aE
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}
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namespace test3 {
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// Tested at the beginning of the file.
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const char * const var = "string";
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extern const char * const var;
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const char *test() { return var; }
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}
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namespace test4 {
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struct A {
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A();
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};
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extern int foo();
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// This needs an initialization function and guard variables.
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// CHECK: load i8* bitcast (i64* @_ZGVN5test41xE
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// CHECK: [[CALL:%.*]] = call i32 @_ZN5test43fooEv
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// CHECK-NEXT: store i32 [[CALL]], i32* @_ZN5test41xE
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// CHECK-NEXT: store i64 1, i64* @_ZGVN5test41xE
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__attribute__((weak)) int x = foo();
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}
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namespace PR5974 {
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struct A { int a; };
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struct B { int b; };
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struct C : A, B { int c; };
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extern C c;
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// These should not require global initializers.
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A* a = &c;
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B* b = &c;
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}
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// PR9570: the indirect field shouldn't crash IR gen.
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namespace test5 {
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static union {
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unsigned bar[4096] __attribute__((aligned(128)));
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};
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}
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namespace std { struct type_info; }
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namespace test6 {
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struct A { virtual ~A(); };
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struct B : A {};
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extern A *p;
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// We must emit a dynamic initializer for 'q', because it could throw.
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B *const q = &dynamic_cast<B&>(*p);
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// CHECK: call void @__cxa_bad_cast()
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// CHECK: store {{.*}} @_ZN5test6L1qE
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// We don't need to emit 'r' at all, because it has internal linkage, is
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// unused, and its initialization has no side-effects.
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B *const r = dynamic_cast<B*>(p);
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// CHECK-NOT: call void @__cxa_bad_cast()
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// CHECK-NOT: store {{.*}} @_ZN5test6L1rE
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// This can throw, so we need to emit it.
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const std::type_info *const s = &typeid(*p);
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// CHECK: store {{.*}} @_ZN5test6L1sE
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// This can't throw, so we don't.
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const std::type_info *const t = &typeid(p);
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// CHECK-NOT: @_ZN5test6L1tE
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extern B *volatile v;
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// CHECK: store {{.*}} @_ZN5test6L1wE
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B *const w = dynamic_cast<B*>(v);
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// CHECK: load volatile
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// CHECK: store {{.*}} @_ZN5test6L1xE
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const int x = *(volatile int*)0x1234;
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namespace {
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int a = int();
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volatile int b = int();
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int c = a;
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int d = b;
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// CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1aE
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// CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1bE
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// CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1cE
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// CHECK: load volatile {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1bE
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// CHECK: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1dE
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}
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}
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namespace test7 {
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struct A { A(); };
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struct B { ~B(); int n; };
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struct C { C() = default; C(const C&); int n; };
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struct D {};
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// CHECK: call void @_ZN5test71AC1Ev({{.*}}@_ZN5test7L1aE)
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const A a = A();
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// CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test71BD1Ev{{.*}} @_ZN5test7L2b1E
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// CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test71BD1Ev{{.*}} @_ZGRN5test72b2E
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// CHECK: call void @_ZN5test71BD1Ev(
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// CHECK: store {{.*}} @_ZN5test7L2b3E
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const B b1 = B();
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const B &b2 = B();
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const int b3 = B().n;
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// CHECK-NOT: @_ZN5test7L2c1E
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// CHECK: @_ZN5test7L2c2E
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// CHECK-NOT: @_ZN5test7L2c3E
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// CHECK: @_ZN5test7L2c4E
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const C c1 = C();
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const C c2 = static_cast<const C&>(C());
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const int c3 = C().n;
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const int c4 = C(C()).n;
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// CHECK-NOT: @_ZN5test7L1dE
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const D d = D();
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// CHECK: store {{.*}} @_ZN5test71eE
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int f(), e = f();
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}
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// At the end of the file, we check that y is initialized before z.
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// CHECK: define internal void [[TEST1_Z_INIT:@.*]]()
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// CHECK: load i32* @_ZN5test1L1yE
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// CHECK-NEXT: xor
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// CHECK-NEXT: store i32 {{.*}}, i32* @_ZN5test1L1zE
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// CHECK: define internal void [[TEST1_Y_INIT:@.*]]()
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// CHECK: load i32* @_ZN5test1L1xE
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// CHECK-NEXT: sub
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// CHECK-NEXT: store i32 {{.*}}, i32* @_ZN5test1L1yE
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// CHECK: define internal void @_GLOBAL__I_a() section "__TEXT,__StaticInit,regular,pure_instructions" {
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// CHECK: call void [[TEST1_Y_INIT]]
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// CHECK: call void [[TEST1_Z_INIT]]
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// rdar://problem/8090834: this should be nounwind
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// CHECK-NOEXC: define internal void @_GLOBAL__I_a() [[NUW:#[0-9]+]] section "__TEXT,__StaticInit,regular,pure_instructions" {
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// CHECK-NOEXC: attributes [[NUW]] = { nounwind }
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