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RedBear-OS/local/recipes/dev/libclc/source/clang/test/CodeGenCXX/builtin-launder.cpp
T
vasilito cb424d7448 build: static patch-sanity linter (shift-left the malformed-patch class) 
verify-patch-sanity.py validates every active recipe .patch has internally-
consistent hunk line counts — catching the 'malformed patch at line N' failure
at commit/CI/preflight time instead of hours into a cook. This cycle hit that
class three times (qtwaylandscanner, sddm, xwayland), each only discovered when
cookbook tried to apply the patch.

Running it across the repo found 29 latent malformed patches (validated against
GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22').
They were harmless only because they sit in vendored recipes (baked, not re-
applied) — but would fail on any version-bump re-derivation. --fix recounts the
hunk headers (body untouched) and repaired all 29.

Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test
(test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats
(empty placeholders, bare-@@ git hunks).
2026-08-01 05:13:02 +03:00

320 lines
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// RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -fstrict-vtable-pointers -o - %s \
// RUN: | FileCheck --check-prefixes=CHECK,CHECK-STRICT %s
// RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -o - %s \
// RUN: | FileCheck --check-prefixes=CHECK,CHECK-NONSTRICT %s
//===----------------------------------------------------------------------===//
// Positive Cases
//===----------------------------------------------------------------------===//
struct TestVirtualFn {
virtual void foo() {}
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_fn
extern "C" void test_builtin_launder_virtual_fn(TestVirtualFn *p) {
// CHECK: store ptr %p, ptr %p.addr
// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr %p.addr
// CHECK-NONSTRICT-NEXT: store ptr [[TMP0]], ptr %d
// CHECK-STRICT-NEXT: [[TMP2:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr [[TMP0]])
// CHECK-STRICT-NEXT: store ptr [[TMP2]], ptr %d
// CHECK-NEXT: ret void
TestVirtualFn *d = __builtin_launder(p);
}
struct TestPolyBase : TestVirtualFn {
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_poly_base
extern "C" void test_builtin_launder_poly_base(TestPolyBase *p) {
// CHECK-STRICT-NOT: ret void
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestPolyBase *d = __builtin_launder(p);
}
struct TestBase {};
struct TestVirtualBase : virtual TestBase {};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_base
extern "C" void test_builtin_launder_virtual_base(TestVirtualBase *p) {
// CHECK-STRICT-NOT: ret void
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestVirtualBase *d = __builtin_launder(p);
}
//===----------------------------------------------------------------------===//
// Negative Cases
//===----------------------------------------------------------------------===//
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_ommitted_one
extern "C" void test_builtin_launder_ommitted_one(int *p) {
// CHECK: entry
// CHECK-NEXT: %p.addr = alloca ptr
// CHECK-NEXT: %d = alloca ptr
// CHECK-NEXT: store ptr %p, ptr %p.addr, align 8
// CHECK-NEXT: [[TMP:%.*]] = load ptr, ptr %p.addr
// CHECK-NEXT: store ptr [[TMP]], ptr %d
// CHECK-NEXT: ret void
int *d = __builtin_launder(p);
}
struct TestNoInvariant {
int x;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_ommitted_two
extern "C" void test_builtin_launder_ommitted_two(TestNoInvariant *p) {
// CHECK: entry
// CHECK-NOT: llvm.launder.invariant.group
// CHECK-NEXT: %p.addr = alloca ptr, align 8
// CHECK-NEXT: %d = alloca ptr
// CHECK-NEXT: store ptr %p, ptr %p.addr
// CHECK-NEXT: [[TMP:%.*]] = load ptr, ptr %p.addr
// CHECK-NEXT: store ptr [[TMP]], ptr %d
// CHECK-NEXT: ret void
TestNoInvariant *d = __builtin_launder(p);
}
struct TestVirtualMember {
TestVirtualFn member;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_member
extern "C" void test_builtin_launder_virtual_member(TestVirtualMember *p) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
TestVirtualMember *d = __builtin_launder(p);
}
struct TestVirtualMemberDepth2 {
TestVirtualMember member;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_member_depth_2
extern "C" void test_builtin_launder_virtual_member_depth_2(TestVirtualMemberDepth2 *p) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
TestVirtualMemberDepth2 *d = __builtin_launder(p);
}
struct TestVirtualReferenceMember {
TestVirtualFn &member;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_reference_member
extern "C" void test_builtin_launder_virtual_reference_member(TestVirtualReferenceMember *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestVirtualReferenceMember *d = __builtin_launder(p);
}
struct TestRecursiveMember {
TestRecursiveMember() : member(*this) {}
TestRecursiveMember &member;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_recursive_member
extern "C" void test_builtin_launder_recursive_member(TestRecursiveMember *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestRecursiveMember *d = __builtin_launder(p);
}
struct TestVirtualRecursiveMember {
TestVirtualRecursiveMember() : member(*this) {}
TestVirtualRecursiveMember &member;
virtual void foo();
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_virtual_recursive_member
extern "C" void test_builtin_launder_virtual_recursive_member(TestVirtualRecursiveMember *p) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
TestVirtualRecursiveMember *d = __builtin_launder(p);
}
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array(
extern "C" void test_builtin_launder_array(TestVirtualFn (&Arr)[5]) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
TestVirtualFn *d = __builtin_launder(Arr);
}
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array_nested(
extern "C" void test_builtin_launder_array_nested(TestVirtualFn (&Arr)[5][2]) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
using RetTy = TestVirtualFn(*)[2];
RetTy d = __builtin_launder(Arr);
}
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array_no_invariant(
extern "C" void test_builtin_launder_array_no_invariant(TestNoInvariant (&Arr)[5]) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestNoInvariant *d = __builtin_launder(Arr);
}
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_array_nested_no_invariant(
extern "C" void test_builtin_launder_array_nested_no_invariant(TestNoInvariant (&Arr)[5][2]) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
using RetTy = TestNoInvariant(*)[2];
RetTy d = __builtin_launder(Arr);
}
template <class Member>
struct WithMember {
Member mem;
};
template struct WithMember<TestVirtualFn[5]>;
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array(
extern "C" void test_builtin_launder_member_array(WithMember<TestVirtualFn[5]> *p) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
auto *d = __builtin_launder(p);
}
template struct WithMember<TestVirtualFn[5][2]>;
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array_nested(
extern "C" void test_builtin_launder_member_array_nested(WithMember<TestVirtualFn[5][2]> *p) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
auto *d = __builtin_launder(p);
}
template struct WithMember<TestNoInvariant[5]>;
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array_no_invariant(
extern "C" void test_builtin_launder_member_array_no_invariant(WithMember<TestNoInvariant[5]> *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
auto *d = __builtin_launder(p);
}
template struct WithMember<TestNoInvariant[5][2]>;
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_member_array_nested_no_invariant(
extern "C" void test_builtin_launder_member_array_nested_no_invariant(WithMember<TestNoInvariant[5][2]> *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
auto *d = __builtin_launder(p);
}
template <class T>
struct WithBase : T {};
template struct WithBase<TestNoInvariant>;
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_base_no_invariant(
extern "C" void test_builtin_launder_base_no_invariant(WithBase<TestNoInvariant> *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
auto *d = __builtin_launder(p);
}
template struct WithBase<TestVirtualFn>;
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_base(
extern "C" void test_builtin_launder_base(WithBase<TestVirtualFn> *p) {
// CHECK: entry
// CHECK-NONSTRICT-NOT: @llvm.launder.invariant.group
// CHECK-STRICT: @llvm.launder.invariant.group
// CHECK: ret void
auto *d = __builtin_launder(p);
}
/// The test cases in this namespace technically need to be laundered according
/// to the language in the standard (ie they have const or reference subobjects)
/// but LLVM doesn't currently optimize on these cases -- so Clang emits
/// __builtin_launder as a nop.
///
/// NOTE: Adding optimizations for these cases later is an LTO ABI break. That's
/// probably OK for now -- but is something to keep in mind.
namespace pessimizing_cases {
struct TestConstMember {
const int x;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_const_member
extern "C" void test_builtin_launder_const_member(TestConstMember *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestConstMember *d = __builtin_launder(p);
}
struct TestConstSubobject {
TestConstMember x;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_const_subobject
extern "C" void test_builtin_launder_const_subobject(TestConstSubobject *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestConstSubobject *d = __builtin_launder(p);
}
struct TestConstObject {
const struct TestConstMember x;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_const_object
extern "C" void test_builtin_launder_const_object(TestConstObject *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestConstObject *d = __builtin_launder(p);
}
struct TestReferenceMember {
int &x;
};
// CHECK-LABEL: define{{.*}} void @test_builtin_launder_reference_member
extern "C" void test_builtin_launder_reference_member(TestReferenceMember *p) {
// CHECK: entry
// CHECK-NOT: @llvm.launder.invariant.group
// CHECK: ret void
TestReferenceMember *d = __builtin_launder(p);
}
} // namespace pessimizing_cases
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