Add test for generator debuginfo

Author: tmandry

src/test/codegen/generator-debug.rs

@@ -0,0 +1,94 @@
+// Verify debuginfo for generators:
+//  - Each variant points to the file and line of its yield point
+//  - The generator types and variants are marked artificial
+//  - Captured vars from the source are not marked artificial
+//
+// ignore-tidy-linelength
+// compile-flags: -C debuginfo=2 --edition=2018
+
+#![feature(generators, generator_trait)]
+use std::ops::Generator;
+
+fn generator_test() -> impl Generator<Yield = i32, Return = ()> {
+    || {
+        yield 0;
+        let s = String::from("foo");
+        yield 1;
+    }
+}
+
+async fn foo() {}
+async fn async_fn_test() {
+    foo().await;
+    let s = String::from("foo");
+    foo().await;
+}
+
+// FIXME: We need "checksum" to prevent matching with the wrong (duplicate) file
+//        metadata, even when -C codegen-units=1.
+// CHECK:      [[FILE:!.*]] = !DIFile(filename: "{{.*}}/generator-debug.rs", {{.*}}, checksum:
+
+// CHECK:      [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "generator-0", scope: [[FN:![0-9]*]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      [[FN]] = !DINamespace(name: "generator_test"
+// CHECK:      [[VARIANT:!.*]] = !DICompositeType(tag: DW_TAG_variant_part, scope: [[FN]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK-SAME: discriminator: [[DISC:![0-9]*]]
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "0", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 13,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DICompositeType(tag: DW_TAG_structure_type, name: "Unresumed", scope: [[GEN]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "1", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 17,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "2", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 17,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "3", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 14,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "4", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 16,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      [[S1:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "Suspend1", scope: [[GEN]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "s", scope: [[S1]]
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      [[DISC]] = !DIDerivedType(tag: DW_TAG_member, name: "__state", scope: [[FN]],
+// CHECK-SAME: flags: DIFlagArtificial
+
+// CHECK:      [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "generator-0", scope: [[FN:![0-9]*]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      [[FN]] = !DINamespace(name: "async_fn_test"
+// CHECK:      [[VARIANT:!.*]] = !DICompositeType(tag: DW_TAG_variant_part, scope: [[FN]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK-SAME: discriminator: [[DISC:![0-9]*]]
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "0", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 21,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "1", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 25,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "2", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 25,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "3", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 22,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "4", scope: [[VARIANT]],
+// CHECK-SAME: file: [[FILE]], line: 24,
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      [[S1:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "Suspend1", scope: [[GEN]],
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK:      {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "s", scope: [[S1]]
+// CHECK-NOT:  flags: DIFlagArtificial
+// CHECK-SAME: )
+// CHECK:      [[DISC]] = !DIDerivedType(tag: DW_TAG_member, name: "__state", scope: [[FN]],
+// CHECK-SAME: flags: DIFlagArtificial
+
+fn main() {
+    let _dummy = generator_test();
+    let _dummy = async_fn_test();
+}