1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
| // RUN: %clangxx -target x86_64-unknown-unknown -g \
// RUN: %s -emit-llvm -S -o - | FileCheck %s
// RUN: %clangxx -target x86_64-unknown-unknown -g \
// RUN: -fno-elide-constructors %s -emit-llvm -S -o - | \
// RUN: FileCheck %s -check-prefix=NOELIDE
struct Foo {
Foo() = default;
Foo(Foo &&other) { x = other.x; }
int x;
};
void some_function(int);
Foo getFoo() {
Foo foo;
foo.x = 41;
some_function(foo.x);
return foo;
}
int main() {
Foo bar = getFoo();
return bar.x;
}
// Check that NRVO variables are stored as a pointer with deref if they are
// stored in the return register.
// CHECK: %[[RESULT:.*]] = alloca i8*, align 8
// CHECK: call void @llvm.dbg.declare(metadata i8** %[[RESULT]],
// CHECK-SAME: metadata !DIExpression(DW_OP_deref)
// NOELIDE: %[[FOO:.*]] = alloca %struct.Foo, align 4
// NOELIDE: call void @llvm.dbg.declare(metadata %struct.Foo* %[[FOO]],
// NOELIDE-SAME: metadata !DIExpression()
|