Auto merge of rust-lang#116837 - oli-obk:smir_run_macro, r=spastorino

Avoid having `rustc_smir` depend on `rustc_interface` or `rustc_driver`

This is done by moving all the logic into a macro that performs the entire "run" operation in one go.

This makes rust-lang#116806 obsolete

as a follow up we should make the macro usable without manually having to write

```rust
#[macro_use]
extern crate rustc_smir;
extern crate stable_mir;
extern crate rustc_driver;
extern crate rustc_interface;
use rustc_smir::rustc_internal;
```

in every crate that uses the macro.

r? `@spastorino`

Author: bors

Cargo.lock

@@ -4483,9 +4483,7 @@ name = "rustc_smir"
 version = "0.0.0"
 dependencies = [
  "rustc_data_structures",
- "rustc_driver",
  "rustc_hir",
- "rustc_interface",
  "rustc_middle",
  "rustc_span",
  "rustc_target",

compiler/rustc_smir/Cargo.toml

@@ -5,9 +5,7 @@ edition = "2021"
 
 [dependencies]
 rustc_data_structures = { path = "../rustc_data_structures" }
-rustc_driver = { path = "../rustc_driver" }
 rustc_hir = { path = "../rustc_hir" }
-rustc_interface = { path = "../rustc_interface" }
 rustc_middle = { path = "../rustc_middle" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }

compiler/rustc_smir/src/rustc_internal/mod.rs

@@ -3,22 +3,18 @@
 //! For that, we define APIs that will temporarily be public to 3P that exposes rustc internal APIs
 //! until stable MIR is complete.
 
-use crate::rustc_internal;
 use crate::rustc_smir::Tables;
 use rustc_data_structures::fx;
 use rustc_data_structures::fx::FxIndexMap;
-use rustc_driver::{Callbacks, Compilation, RunCompiler};
-use rustc_interface::{interface, Queries};
 use rustc_middle::mir::interpret::AllocId;
 use rustc_middle::ty;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::def_id::{CrateNum, DefId};
 use rustc_span::Span;
 use stable_mir::ty::IndexedVal;
-use stable_mir::CompilerError;
 use std::fmt::Debug;
 use std::hash::Hash;
-use std::ops::{ControlFlow, Index};
+use std::ops::Index;
 
 impl<'tcx> Index<stable_mir::DefId> for Tables<'tcx> {
     type Output = DefId;
@@ -141,63 +137,81 @@ pub fn run(tcx: TyCtxt<'_>, f: impl FnOnce()) {
     );
 }
 
-pub struct StableMir<B = (), C = ()>
-where
-    B: Send,
-    C: Send,
-{
-    args: Vec<String>,
-    callback: fn(TyCtxt<'_>) -> ControlFlow<B, C>,
-    result: Option<ControlFlow<B, C>>,
-}
+#[macro_export]
+macro_rules! run {
+    ($args:expr, $callback:expr) => {
+        run!($args, tcx, $callback)
+    };
+    ($args:expr, $tcx:ident, $callback:expr) => {{
+        use rustc_driver::{Callbacks, Compilation, RunCompiler};
+        use rustc_interface::{interface, Queries};
+        use stable_mir::CompilerError;
+        use std::ops::ControlFlow;
+
+        pub struct StableMir<B = (), C = ()>
+        where
+            B: Send,
+            C: Send,
+        {
+            args: Vec<String>,
+            callback: fn(TyCtxt<'_>) -> ControlFlow<B, C>,
+            result: Option<ControlFlow<B, C>>,
+        }
 
-impl<B, C> StableMir<B, C>
-where
-    B: Send,
-    C: Send,
-{
-    /// Creates a new `StableMir` instance, with given test_function and arguments.
-    pub fn new(args: Vec<String>, callback: fn(TyCtxt<'_>) -> ControlFlow<B, C>) -> Self {
-        StableMir { args, callback, result: None }
-    }
-
-    /// Runs the compiler against given target and tests it with `test_function`
-    pub fn run(&mut self) -> Result<C, CompilerError<B>> {
-        let compiler_result =
-            rustc_driver::catch_fatal_errors(|| RunCompiler::new(&self.args.clone(), self).run());
-        match (compiler_result, self.result.take()) {
-            (Ok(Ok(())), Some(ControlFlow::Continue(value))) => Ok(value),
-            (Ok(Ok(())), Some(ControlFlow::Break(value))) => Err(CompilerError::Interrupted(value)),
-            (Ok(Ok(_)), None) => Err(CompilerError::Skipped),
-            (Ok(Err(_)), _) => Err(CompilerError::CompilationFailed),
-            (Err(_), _) => Err(CompilerError::ICE),
+        impl<B, C> StableMir<B, C>
+        where
+            B: Send,
+            C: Send,
+        {
+            /// Creates a new `StableMir` instance, with given test_function and arguments.
+            pub fn new(args: Vec<String>, callback: fn(TyCtxt<'_>) -> ControlFlow<B, C>) -> Self {
+                StableMir { args, callback, result: None }
+            }
+
+            /// Runs the compiler against given target and tests it with `test_function`
+            pub fn run(&mut self) -> Result<C, CompilerError<B>> {
+                let compiler_result = rustc_driver::catch_fatal_errors(|| {
+                    RunCompiler::new(&self.args.clone(), self).run()
+                });
+                match (compiler_result, self.result.take()) {
+                    (Ok(Ok(())), Some(ControlFlow::Continue(value))) => Ok(value),
+                    (Ok(Ok(())), Some(ControlFlow::Break(value))) => {
+                        Err(CompilerError::Interrupted(value))
+                    }
+                    (Ok(Ok(_)), None) => Err(CompilerError::Skipped),
+                    (Ok(Err(_)), _) => Err(CompilerError::CompilationFailed),
+                    (Err(_), _) => Err(CompilerError::ICE),
+                }
+            }
         }
-    }
-}
 
-impl<B, C> Callbacks for StableMir<B, C>
-where
-    B: Send,
-    C: Send,
-{
-    /// Called after analysis. Return value instructs the compiler whether to
-    /// continue the compilation afterwards (defaults to `Compilation::Continue`)
-    fn after_analysis<'tcx>(
-        &mut self,
-        _compiler: &interface::Compiler,
-        queries: &'tcx Queries<'tcx>,
-    ) -> Compilation {
-        queries.global_ctxt().unwrap().enter(|tcx| {
-            rustc_internal::run(tcx, || {
-                self.result = Some((self.callback)(tcx));
-            });
-            if self.result.as_ref().is_some_and(|val| val.is_continue()) {
-                Compilation::Continue
-            } else {
-                Compilation::Stop
+        impl<B, C> Callbacks for StableMir<B, C>
+        where
+            B: Send,
+            C: Send,
+        {
+            /// Called after analysis. Return value instructs the compiler whether to
+            /// continue the compilation afterwards (defaults to `Compilation::Continue`)
+            fn after_analysis<'tcx>(
+                &mut self,
+                _compiler: &interface::Compiler,
+                queries: &'tcx Queries<'tcx>,
+            ) -> Compilation {
+                queries.global_ctxt().unwrap().enter(|tcx| {
+                    rustc_internal::run(tcx, || {
+                        self.result = Some((self.callback)(tcx));
+                    });
+                    if self.result.as_ref().is_some_and(|val| val.is_continue()) {
+                        Compilation::Continue
+                    } else {
+                        Compilation::Stop
+                    }
+                })
             }
-        })
-    }
+        }
+
+        StableMir::new($args, |$tcx| $callback).run()
+    }};
 }
 
 /// Simmilar to rustc's `FxIndexMap`, `IndexMap` with extra

tests/ui-fulldeps/stable-mir/compilation-result.rs

@@ -4,19 +4,22 @@
 // ignore-stage1
 // ignore-cross-compile
 // ignore-remote
+// ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
 // edition: 2021
 
 #![feature(rustc_private)]
 #![feature(assert_matches)]
 
 extern crate rustc_middle;
+#[macro_use]
 extern crate rustc_smir;
+extern crate rustc_driver;
+extern crate rustc_interface;
 extern crate stable_mir;
 
 use rustc_middle::ty::TyCtxt;
 use rustc_smir::rustc_internal;
 use std::io::Write;
-use std::ops::ControlFlow;
 
 /// This test will generate and analyze a dummy crate using the stable mir.
 /// For that, it will first write the dummy crate into a file.
@@ -33,28 +36,26 @@ fn main() {
 }
 
 fn test_continue(args: Vec<String>) {
-    let continue_fn = |_: TyCtxt| ControlFlow::Continue::<(), bool>(true);
-    let result = rustc_internal::StableMir::new(args, continue_fn).run();
+    let result = run!(args, ControlFlow::Continue::<(), bool>(true));
     assert_eq!(result, Ok(true));
 }
 
 fn test_break(args: Vec<String>) {
-    let continue_fn = |_: TyCtxt| ControlFlow::Break::<bool, i32>(false);
-    let result = rustc_internal::StableMir::new(args, continue_fn).run();
+    let result = run!(args, ControlFlow::Break::<bool, i32>(false));
     assert_eq!(result, Err(stable_mir::CompilerError::Interrupted(false)));
 }
 
+#[allow(unreachable_code)]
 fn test_skipped(mut args: Vec<String>) {
     args.push("--version".to_string());
-    let unreach_fn = |_: TyCtxt| -> ControlFlow<()> { unreachable!() };
-    let result = rustc_internal::StableMir::new(args, unreach_fn).run();
+    let result = run!(args, unreachable!() as ControlFlow<()>);
     assert_eq!(result, Err(stable_mir::CompilerError::Skipped));
 }
 
+#[allow(unreachable_code)]
 fn test_failed(mut args: Vec<String>) {
     args.push("--cfg=broken".to_string());
-    let unreach_fn = |_: TyCtxt| -> ControlFlow<()> { unreachable!() };
-    let result = rustc_internal::StableMir::new(args, unreach_fn).run();
+    let result = run!(args, unreachable!() as ControlFlow<()>);
     assert_eq!(result, Err(stable_mir::CompilerError::CompilationFailed));
 }
 

tests/ui-fulldeps/stable-mir/crate-info.rs

@@ -4,6 +4,7 @@
 // ignore-stage1
 // ignore-cross-compile
 // ignore-remote
+// ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
 // edition: 2021
 
 #![feature(rustc_private)]
@@ -12,7 +13,10 @@
 
 extern crate rustc_hir;
 extern crate rustc_middle;
+#[macro_use]
 extern crate rustc_smir;
+extern crate rustc_driver;
+extern crate rustc_interface;
 extern crate stable_mir;
 
 use rustc_hir::def::DefKind;
@@ -127,7 +131,8 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
                                 mut args,
                             )) => {
                                 let func = def.body();
-                                match func.locals[1].ty
+                                match func.locals[1]
+                                    .ty
                                     .fold(&mut args)
                                     .continue_value()
                                     .unwrap()
@@ -185,7 +190,7 @@ fn main() {
         CRATE_NAME.to_string(),
         path.to_string(),
     ];
-    rustc_internal::StableMir::new(args, test_stable_mir).run().unwrap();
+    run!(args, tcx, test_stable_mir(tcx)).unwrap();
 }
 
 fn generate_input(path: &str) -> std::io::Result<()> {

tests/ui-fulldeps/stable-mir/instance.rs

@@ -4,20 +4,24 @@
 // ignore-stage1
 // ignore-cross-compile
 // ignore-remote
+// ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
 // edition: 2021
 
 #![feature(rustc_private)]
 #![feature(assert_matches)]
 #![feature(control_flow_enum)]
 
 extern crate rustc_middle;
+#[macro_use]
 extern crate rustc_smir;
+extern crate rustc_driver;
+extern crate rustc_interface;
 extern crate stable_mir;
 
 use rustc_middle::ty::TyCtxt;
 
-use stable_mir::*;
 use rustc_smir::rustc_internal;
+use stable_mir::*;
 use std::io::Write;
 use std::ops::ControlFlow;
 
@@ -28,16 +32,16 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     let items = stable_mir::all_local_items();
 
     // Get all items and split generic vs monomorphic items.
-    let (generic, mono) : (Vec<_>, Vec<_>) = items.into_iter().partition(|item| {
-        item.requires_monomorphization()
-    });
+    let (generic, mono): (Vec<_>, Vec<_>) =
+        items.into_iter().partition(|item| item.requires_monomorphization());
     assert_eq!(mono.len(), 3, "Expected 2 mono functions and one constant");
     assert_eq!(generic.len(), 2, "Expected 2 generic functions");
 
     // For all monomorphic items, get the correspondent instances.
-    let instances = mono.iter().filter_map(|item| {
-        mir::mono::Instance::try_from(*item).ok()
-    }).collect::<Vec<mir::mono::Instance>>();
+    let instances = mono
+        .iter()
+        .filter_map(|item| mir::mono::Instance::try_from(*item).ok())
+        .collect::<Vec<mir::mono::Instance>>();
     assert_eq!(instances.len(), mono.len());
 
     // For all generic items, try_from should fail.
@@ -46,7 +50,6 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
     ControlFlow::Continue(())
 }
 
-
 /// This test will generate and analyze a dummy crate using the stable mir.
 /// For that, it will first write the dummy crate into a file.
 /// Then it will create a `StableMir` using custom arguments and then
@@ -61,7 +64,7 @@ fn main() {
         CRATE_NAME.to_string(),
         path.to_string(),
     ];
-    rustc_internal::StableMir::new(args, test_stable_mir).run().unwrap();
+    run!(args, tcx, test_stable_mir(tcx)).unwrap();
 }
 
 fn generate_input(path: &str) -> std::io::Result<()> {