Add tests for --emit=* + --json=artifacts

tests/run-make/emit-notify/lib.rs

@@ -0,0 +1,23 @@
+//@ compile-flags: -C codegen-units=1 --emit asm,llvm-ir,llvm-bc,obj --json=artifacts --error-format=json
+
+fn one() -> usize {
+    1
+}
+
+pub mod a {
+    pub fn two() -> usize {
+        ::one() + ::one()
+    }
+}
+
+pub mod b {
+    pub fn three() -> usize {
+        ::one() + ::a::two()
+    }
+}
+
+#[inline(never)]
+pub fn main() {
+    a::two();
+    b::three();
+}

tests/run-make/emit-notify/rmake.rs

@@ -0,0 +1,37 @@
+extern crate run_make_support;
+
+use run_make_support::{rustc, tmp_dir, ErrorFormat};
+
+fn main() {
+    let inc_dir = tmp_dir();
+
+    for _ in 0..=1 {
+        let output = rustc()
+            .input("lib.rs")
+            .emit("obj,asm,llvm-ir,llvm-bc,mir")
+            .codegen_units(1)
+            .json("artifacts")
+            .error_format(ErrorFormat::Json)
+            .incremental(&inc_dir)
+            .run();
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        for file in &["lib.o", "lib.ll", "lib.bc", "lib.s"] {
+            assert!(stderr.contains(file), "No {:?} in {:?}", file, stderr);
+        }
+    }
+
+    for _ in 0..=1 {
+        let output = rustc()
+            .input("lib.rs")
+            .emit("obj,asm,llvm-ir,llvm-bc,mir")
+            .codegen_units(2)
+            .json("artifacts")
+            .error_format(ErrorFormat::Json)
+            .incremental(&inc_dir)
+            .run();
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        for file in &["rcgu.o", "rcgu.ll", "rcgu.bc", "rcgu.s"] {
+            assert!(stderr.contains(file), "No {:?} in {:?}", file, stderr);
+        }
+    }
+}