1 // RUN: %clangxx -target x86_64-unknown-unknown -g \
2 // RUN: %s -emit-llvm -S -o - | FileCheck %s
3
4 // RUN: %clangxx -target x86_64-unknown-unknown -g \
5 // RUN: -fno-elide-constructors %s -emit-llvm -S -o - | \
6 // RUN: FileCheck %s -check-prefix=NOELIDE
7
8 struct Foo {
9 Foo() = default;
FooFoo10 Foo(Foo &&other) { x = other.x; }
11 int x;
12 };
13 void some_function(int);
getFoo()14 Foo getFoo() {
15 Foo foo;
16 foo.x = 41;
17 some_function(foo.x);
18 return foo;
19 }
20
main()21 int main() {
22 Foo bar = getFoo();
23 return bar.x;
24 }
25
26 // Check that NRVO variables are stored as a pointer with deref if they are
27 // stored in the return register.
28
29 // CHECK: %[[RESULT:.*]] = alloca i8*, align 8
30 // CHECK: call void @llvm.dbg.declare(metadata i8** %[[RESULT]],
31 // CHECK-SAME: metadata !DIExpression(DW_OP_deref)
32
33 // NOELIDE: %[[FOO:.*]] = alloca %struct.Foo, align 4
34 // NOELIDE: call void @llvm.dbg.declare(metadata %struct.Foo* %[[FOO]],
35 // NOELIDE-SAME: metadata !DIExpression()
36