1 files changed, 55 insertions, 0 deletions
diff --git a/tests/codegen-llvm/async-fn-debug-msvc.rs b/tests/codegen-llvm/async-fn-debug-msvc.rs
new file mode 100644
index 00000000000..e0c601146f8
--- /dev/null
+++ b/tests/codegen-llvm/async-fn-debug-msvc.rs
@@ -0,0 +1,55 @@
+// Verify debuginfo for coroutines:
+//  - Each variant points to the file and line of its yield point
+//  - The discriminants are marked artificial
+//  - Other fields are not marked artificial
+//
+//
+//@ compile-flags: -C debuginfo=2
+//@ edition: 2018
+//@ only-msvc
+
+async fn foo() {}
+async fn async_fn_test() {
+    foo().await;
+    let s = String::from("foo");
+    foo().await;
+}
+
+// FIXME: No way to reliably check the filename.
+
+// CHECK-DAG:  [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_union_type, name: "enum2$<async_fn_debug_msvc::async_fn_test::async_fn_env$0>",
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "variant0", scope: [[GEN]],
+// For brevity, we only check the struct name and members of the last variant.
+// CHECK-SAME: file: [[FILE:![0-9]*]], line: 12,
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "variant1", scope: [[GEN]],
+// CHECK-SAME: file: [[FILE]], line: 16,
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "variant2", scope: [[GEN]],
+// CHECK-SAME: file: [[FILE]], line: 16,
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "variant3", scope: [[GEN]],
+// CHECK-SAME: file: [[FILE]], line: 13,
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "variant4", scope: [[GEN]],
+// CHECK-SAME: file: [[FILE]], line: 15,
+// CHECK-SAME: baseType: [[VARIANT_WRAPPER:![0-9]*]]
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "value", scope: [[VARIANT_WRAPPER]], file: !2, baseType: [[VARIANT:![0-9]*]],
+// CHECK:      [[VARIANT]] = !DICompositeType(tag: DW_TAG_structure_type, name: "Suspend1", scope: [[GEN]],
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "s", scope: [[VARIANT]]
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "tag", scope: [[GEN]],
+// CHECK-NOT: flags: DIFlagArtificial
+
+fn main() {
+    let _dummy = async_fn_test();
+}