Add example assembly test to test-project

Author: alessandrod

test-project/Cargo.toml

@@ -11,3 +11,4 @@ features = ["tmp"]
 
 [features]
 rustc = ["compiletest_rs/rustc"]
+assembly = []

test-project/tests/assembly/panic.rs

@@ -0,0 +1,10 @@
+// assembly-output: emit-asm
+// compile-flags: --crate-type rlib
+#![no_std]
+
+#[no_mangle]
+fn panic_fun() -> u32 {
+    // CHECK-LABEL: panic_fun:
+    // CHECK: ud2
+    panic!();
+}

test-project/tests/tests.rs

@@ -1,5 +1,6 @@
 extern crate compiletest_rs as compiletest;
 
+use std::env;
 use std::path::PathBuf;
 
 fn run_mode(mode: &'static str, custom_dir: Option<&'static str>) {
@@ -11,6 +12,11 @@ fn run_mode(mode: &'static str, custom_dir: Option<&'static str>) {
     let dir = custom_dir.unwrap_or(mode);
     config.src_base = PathBuf::from(format!("tests/{}", dir));
     config.target_rustcflags = Some("-L target/debug -L target/debug/deps".to_string());
+    config.llvm_filecheck = Some(
+        env::var("FILECHECK")
+            .unwrap_or("FileCheck".to_string())
+            .into(),
+    );
     config.clean_rmeta();
 
     compiletest::run_tests(&config);
@@ -21,6 +27,8 @@ fn compile_test() {
     run_mode("compile-fail", None);
     run_mode("run-pass", None);
     run_mode("ui", None);
+    #[cfg(feature = "assembly")]
+    run_mode("assembly", None);
 
     #[cfg(feature = "rustc")]
     run_mode("pretty", None);