rewrite sepcomp-separate to rmake

Cargo.lock

@@ -3461,6 +3461,7 @@ name = "run_make_support"
 version = "0.2.0"
 dependencies = [
  "gimli 0.28.1",
+ "glob",
  "object 0.34.0",
  "regex",
  "similar",

src/tools/run-make-support/Cargo.toml

@@ -9,3 +9,4 @@ similar = "2.5.0"
 wasmparser = "0.118.2"
 regex = "1.8" # 1.8 to avoid memchr 2.6.0, as 2.5.0 is pinned in the workspace
 gimli = "0.28.1"
+glob = "0.3.1"

src/tools/run-make-support/src/fs_wrapper.rs

@@ -1,7 +1,7 @@
 use std::fs;
 use std::path::Path;
 
-/// A wrapper around [`std::fs::remove_file`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::remove_file`] which includes the file path in the panic message.
 #[track_caller]
 pub fn remove_file<P: AsRef<Path>>(path: P) {
     fs::remove_file(path.as_ref())
@@ -18,21 +18,28 @@ pub fn copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) {
     ));
 }
 
-/// A wrapper around [`std::fs::File::create`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::File::create`] which includes the file path in the panic message.
 #[track_caller]
 pub fn create_file<P: AsRef<Path>>(path: P) {
     fs::File::create(path.as_ref())
         .expect(&format!("the file in path \"{}\" could not be created", path.as_ref().display()));
 }
 
-/// A wrapper around [`std::fs::read`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::File::open`] which includes the file path in the panic message.
+#[track_caller]
+pub fn open_file<P: AsRef<Path>>(path: P) -> fs::File {
+    fs::File::open(path.as_ref())
+        .expect(&format!("the file in path \"{}\" could not be opened", path.as_ref().display()))
+}
+
+/// A wrapper around [`std::fs::read`] which includes the file path in the panic message.
 #[track_caller]
 pub fn read<P: AsRef<Path>>(path: P) -> Vec<u8> {
     fs::read(path.as_ref())
         .expect(&format!("the file in path \"{}\" could not be read", path.as_ref().display()))
 }
 
-/// A wrapper around [`std::fs::read_to_string`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::read_to_string`] which includes the file path in the panic message.
 #[track_caller]
 pub fn read_to_string<P: AsRef<Path>>(path: P) -> String {
     fs::read_to_string(path.as_ref()).expect(&format!(
@@ -41,14 +48,14 @@ pub fn read_to_string<P: AsRef<Path>>(path: P) -> String {
     ))
 }
 
-/// A wrapper around [`std::fs::read_dir`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::read_dir`] which includes the file path in the panic message.
 #[track_caller]
 pub fn read_dir<P: AsRef<Path>>(path: P) -> fs::ReadDir {
     fs::read_dir(path.as_ref())
         .expect(&format!("the directory in path \"{}\" could not be read", path.as_ref().display()))
 }
 
-/// A wrapper around [`std::fs::write`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::write`] which includes the file path in the panic message.
 #[track_caller]
 pub fn write<P: AsRef<Path>, C: AsRef<[u8]>>(path: P, contents: C) {
     fs::write(path.as_ref(), contents.as_ref()).expect(&format!(
@@ -57,7 +64,7 @@ pub fn write<P: AsRef<Path>, C: AsRef<[u8]>>(path: P, contents: C) {
     ));
 }
 
-/// A wrapper around [`std::fs::remove_dir_all`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::remove_dir_all`] which includes the file path in the panic message.
 #[track_caller]
 pub fn remove_dir_all<P: AsRef<Path>>(path: P) {
     fs::remove_dir_all(path.as_ref()).expect(&format!(
@@ -66,7 +73,7 @@ pub fn remove_dir_all<P: AsRef<Path>>(path: P) {
     ));
 }
 
-/// A wrapper around [`std::fs::create_dir`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::create_dir`] which includes the file path in the panic message.
 #[track_caller]
 pub fn create_dir<P: AsRef<Path>>(path: P) {
     fs::create_dir(path.as_ref()).expect(&format!(
@@ -75,7 +82,7 @@ pub fn create_dir<P: AsRef<Path>>(path: P) {
     ));
 }
 
-/// A wrapper around [`std::fs::create_dir_all`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::create_dir_all`] which includes the file path in the panic message.
 #[track_caller]
 pub fn create_dir_all<P: AsRef<Path>>(path: P) {
     fs::create_dir_all(path.as_ref()).expect(&format!(
@@ -84,7 +91,7 @@ pub fn create_dir_all<P: AsRef<Path>>(path: P) {
     ));
 }
 
-/// A wrapper around [`std::fs::metadata`] which includes the file path in the panic message..
+/// A wrapper around [`std::fs::metadata`] which includes the file path in the panic message.
 #[track_caller]
 pub fn metadata<P: AsRef<Path>>(path: P) -> fs::Metadata {
     fs::metadata(path.as_ref()).expect(&format!(

src/tools/run-make-support/src/lib.rs

@@ -22,6 +22,7 @@ use std::panic;
 use std::path::{Path, PathBuf};
 
 pub use gimli;
+pub use glob;
 pub use object;
 pub use regex;
 pub use wasmparser;

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -208,7 +208,6 @@ run-make/separate-link-fail/Makefile
 run-make/separate-link/Makefile
 run-make/sepcomp-cci-copies/Makefile
 run-make/sepcomp-inlining/Makefile
-run-make/sepcomp-separate/Makefile
 run-make/share-generics-dylib/Makefile
 run-make/silly-file-names/Makefile
 run-make/simd-ffi/Makefile

tests/run-make/intrinsic-unreachable/rmake.rs

@@ -5,15 +5,18 @@
 // See https://github.com/rust-lang/rust/pull/16970
 
 //@ needs-asm-support
-//@ ignore-windows-msvc
+//@ ignore-windows
 // Reason: Because of Windows exception handling, the code is not necessarily any shorter.
 
-use run_make_support::rustc;
-use std::io::BufReader;
-use std::fs::File;
+use run_make_support::{fs_wrapper, rustc};
+use std::io::{BufRead, BufReader};
 
 fn main() {
     rustc().opt().emit("asm").input("exit-ret.rs").run();
     rustc().opt().emit("asm").input("exit-unreachable.rs").run();
-    assert!(BufReader::new(File::open("exit-unreachable.s")).lines().count() < BufReader::new(File::open("exit-ret.s")).lines().count());
+    let unreachable_file = fs_wrapper::open_file("exit-unreachable.s");
+    let ret_file = fs_wrapper::open_file("exit-ret.s");
+    assert!(
+        BufReader::new(unreachable_file).lines().count() < BufReader::new(ret_file).lines().count()
+    );
 }

tests/run-make/sepcomp-separate/rmake.rs

@@ -0,0 +1,24 @@
+// Test that separate compilation actually puts code into separate compilation
+// units.  `foo.rs` defines `magic_fn` in three different modules, which should
+// wind up in three different compilation units.
+// See https://github.com/rust-lang/rust/pull/16367
+
+use run_make_support::{fs_wrapper, glob, regex, rustc};
+use std::io::{BufRead, BufReader};
+
+fn main() {
+    let mut match_count = 0;
+    rustc().input("foo.rs").emit("llvm-ir").codegen_units(3).run();
+    let re = regex::Regex::new(r#"define.*magic_fn"#).unwrap();
+    let paths = glob::glob("foo.*.ll").unwrap();
+    paths.filter_map(|entry| entry.ok()).filter(|path| path.is_file()).for_each(|path| {
+        let file = fs_wrapper::open_file(path);
+        let reader = BufReader::new(file);
+        reader
+            .lines()
+            .filter_map(|line| line.ok())
+            .filter(|line| re.is_match(line))
+            .for_each(|_| match_count += 1);
+    });
+    assert_eq!(match_count, 3);
+}