322 lines
11 KiB
C++
322 lines
11 KiB
C++
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// RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -fstrict-vtable-pointers -o - %s \
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// RUN: | FileCheck --check-prefixes=CHECK,CHECK-STRICT %s
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// RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -o - %s \
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// RUN: | FileCheck --check-prefixes=CHECK,CHECK-NONSTRICT %s
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//===----------------------------------------------------------------------===//
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// Positive Cases
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//===----------------------------------------------------------------------===//
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struct TestVirtualFn {
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virtual void foo() {}
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_fn
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extern "C" void test_builtin_launder_virtual_fn(TestVirtualFn *p) {
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// CHECK: store [[TYPE:%[^ ]+]] %p, [[TYPE]]* %p.addr
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// CHECK-NEXT: [[TMP0:%.*]] = load [[TYPE]], [[TYPE]]* %p.addr
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// CHECK-NONSTRICT-NEXT: store [[TYPE]] [[TMP0]], [[TYPE]]* %d
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// CHECK-STRICT-NEXT: [[TMP1:%.*]] = bitcast [[TYPE]] [[TMP0]] to i8*
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// CHECK-STRICT-NEXT: [[TMP2:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[TMP1]])
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// CHECK-STRICT-NEXT: [[TMP3:%.*]] = bitcast i8* [[TMP2]] to [[TYPE]]
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// CHECK-STRICT-NEXT: store [[TYPE]] [[TMP3]], [[TYPE]]* %d
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// CHECK-NEXT: ret void
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TestVirtualFn *d = __builtin_launder(p);
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}
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struct TestPolyBase : TestVirtualFn {
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_poly_base
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extern "C" void test_builtin_launder_poly_base(TestPolyBase *p) {
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// CHECK-STRICT-NOT: ret void
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestPolyBase *d = __builtin_launder(p);
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}
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struct TestBase {};
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struct TestVirtualBase : virtual TestBase {};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_base
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extern "C" void test_builtin_launder_virtual_base(TestVirtualBase *p) {
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// CHECK-STRICT-NOT: ret void
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestVirtualBase *d = __builtin_launder(p);
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}
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//===----------------------------------------------------------------------===//
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// Negative Cases
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//===----------------------------------------------------------------------===//
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_ommitted_one
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extern "C" void test_builtin_launder_ommitted_one(int *p) {
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// CHECK: entry
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// CHECK-NEXT: %p.addr = alloca i32*
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// CHECK-NEXT: %d = alloca i32*
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// CHECK-NEXT: store i32* %p, i32** %p.addr, align 8
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// CHECK-NEXT: [[TMP:%.*]] = load i32*, i32** %p.addr
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// CHECK-NEXT: store i32* [[TMP]], i32** %d
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// CHECK-NEXT: ret void
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int *d = __builtin_launder(p);
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}
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struct TestNoInvariant {
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int x;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_ommitted_two
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extern "C" void test_builtin_launder_ommitted_two(TestNoInvariant *p) {
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// CHECK: entry
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// CHECK-NOT: llvm.launder.invariant.group
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// CHECK-NEXT: %p.addr = alloca [[TYPE:%.*]], align 8
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// CHECK-NEXT: %d = alloca [[TYPE]]
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// CHECK-NEXT: store [[TYPE]] %p, [[TYPE]]* %p.addr
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// CHECK-NEXT: [[TMP:%.*]] = load [[TYPE]], [[TYPE]]* %p.addr
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// CHECK-NEXT: store [[TYPE]] [[TMP]], [[TYPE]]* %d
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// CHECK-NEXT: ret void
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TestNoInvariant *d = __builtin_launder(p);
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}
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struct TestVirtualMember {
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TestVirtualFn member;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_member
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extern "C" void test_builtin_launder_virtual_member(TestVirtualMember *p) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestVirtualMember *d = __builtin_launder(p);
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}
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struct TestVirtualMemberDepth2 {
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TestVirtualMember member;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_member_depth_2
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extern "C" void test_builtin_launder_virtual_member_depth_2(TestVirtualMemberDepth2 *p) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestVirtualMemberDepth2 *d = __builtin_launder(p);
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}
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struct TestVirtualReferenceMember {
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TestVirtualFn &member;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_reference_member
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extern "C" void test_builtin_launder_virtual_reference_member(TestVirtualReferenceMember *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestVirtualReferenceMember *d = __builtin_launder(p);
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}
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struct TestRecursiveMember {
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TestRecursiveMember() : member(*this) {}
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TestRecursiveMember &member;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_recursive_member
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extern "C" void test_builtin_launder_recursive_member(TestRecursiveMember *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestRecursiveMember *d = __builtin_launder(p);
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}
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struct TestVirtualRecursiveMember {
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TestVirtualRecursiveMember() : member(*this) {}
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TestVirtualRecursiveMember &member;
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virtual void foo();
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_recursive_member
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extern "C" void test_builtin_launder_virtual_recursive_member(TestVirtualRecursiveMember *p) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestVirtualRecursiveMember *d = __builtin_launder(p);
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}
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array(
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extern "C" void test_builtin_launder_array(TestVirtualFn (&Arr)[5]) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestVirtualFn *d = __builtin_launder(Arr);
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}
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array_nested(
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extern "C" void test_builtin_launder_array_nested(TestVirtualFn (&Arr)[5][2]) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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using RetTy = TestVirtualFn(*)[2];
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RetTy d = __builtin_launder(Arr);
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}
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array_no_invariant(
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extern "C" void test_builtin_launder_array_no_invariant(TestNoInvariant (&Arr)[5]) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestNoInvariant *d = __builtin_launder(Arr);
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}
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array_nested_no_invariant(
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extern "C" void test_builtin_launder_array_nested_no_invariant(TestNoInvariant (&Arr)[5][2]) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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using RetTy = TestNoInvariant(*)[2];
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RetTy d = __builtin_launder(Arr);
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}
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template <class Member>
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struct WithMember {
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Member mem;
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};
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template struct WithMember<TestVirtualFn[5]>;
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array(
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extern "C" void test_builtin_launder_member_array(WithMember<TestVirtualFn[5]> *p) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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auto *d = __builtin_launder(p);
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}
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template struct WithMember<TestVirtualFn[5][2]>;
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array_nested(
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extern "C" void test_builtin_launder_member_array_nested(WithMember<TestVirtualFn[5][2]> *p) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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auto *d = __builtin_launder(p);
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}
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template struct WithMember<TestNoInvariant[5]>;
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array_no_invariant(
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extern "C" void test_builtin_launder_member_array_no_invariant(WithMember<TestNoInvariant[5]> *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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auto *d = __builtin_launder(p);
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}
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template struct WithMember<TestNoInvariant[5][2]>;
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array_nested_no_invariant(
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extern "C" void test_builtin_launder_member_array_nested_no_invariant(WithMember<TestNoInvariant[5][2]> *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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auto *d = __builtin_launder(p);
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}
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template <class T>
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struct WithBase : T {};
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template struct WithBase<TestNoInvariant>;
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_base_no_invariant(
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extern "C" void test_builtin_launder_base_no_invariant(WithBase<TestNoInvariant> *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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auto *d = __builtin_launder(p);
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}
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template struct WithBase<TestVirtualFn>;
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_base(
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extern "C" void test_builtin_launder_base(WithBase<TestVirtualFn> *p) {
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// CHECK: entry
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// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
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// CHECK-STRICT: @llvm.launder.invariant.group
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// CHECK: ret void
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auto *d = __builtin_launder(p);
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}
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/// The test cases in this namespace technically need to be laundered according
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/// to the language in the standard (ie they have const or reference subobjects)
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/// but LLVM doesn't currently optimize on these cases -- so Clang emits
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/// __builtin_launder as a nop.
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///
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/// NOTE: Adding optimizations for these cases later is an LTO ABI break. That's
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/// probably OK for now -- but is something to keep in mind.
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namespace pessimizing_cases {
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struct TestConstMember {
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const int x;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_const_member
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extern "C" void test_builtin_launder_const_member(TestConstMember *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestConstMember *d = __builtin_launder(p);
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}
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struct TestConstSubobject {
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TestConstMember x;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_const_subobject
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extern "C" void test_builtin_launder_const_subobject(TestConstSubobject *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestConstSubobject *d = __builtin_launder(p);
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}
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struct TestConstObject {
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const struct TestConstMember x;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_const_object
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extern "C" void test_builtin_launder_const_object(TestConstObject *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestConstObject *d = __builtin_launder(p);
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}
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struct TestReferenceMember {
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int &x;
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};
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// CHECK-LABEL: define{{.*}} void @test_builtin_launder_reference_member
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extern "C" void test_builtin_launder_reference_member(TestReferenceMember *p) {
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// CHECK: entry
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// CHECK-NOT: @llvm.launder.invariant.group
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// CHECK: ret void
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TestReferenceMember *d = __builtin_launder(p);
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}
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} // namespace pessimizing_cases
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