Avoid using the lowering context in `librustc_save_analysis`

src/librustc_driver/driver.rs

@@ -165,8 +165,7 @@ pub fn compile_input(sess: &Session,
                                                                          &hir_map,
                                                                          &expanded_crate,
                                                                          &hir_map.krate(),
-                                                                         &id[..],
-                                                                         &lcx),
+                                                                         &id[..]),
                                     Ok(()));
         }
 
@@ -203,7 +202,6 @@ pub fn compile_input(sess: &Session,
                                                                &analysis,
                                                                mir_map.as_ref(),
                                                                tcx,
-                                                               &lcx,
                                                                &id);
                 (control.after_analysis.callback)(state);
 
@@ -345,7 +343,6 @@ pub struct CompileState<'a, 'ast: 'a, 'tcx: 'a> {
     pub mir_map: Option<&'a MirMap<'tcx>>,
     pub analysis: Option<&'a ty::CrateAnalysis<'a>>,
     pub tcx: Option<&'a TyCtxt<'tcx>>,
-    pub lcx: Option<&'a LoweringContext<'a>>,
     pub trans: Option<&'a trans::CrateTranslation>,
 }
 
@@ -368,7 +365,6 @@ fn empty(input: &'a Input,
             analysis: None,
             mir_map: None,
             tcx: None,
-            lcx: None,
             trans: None,
         }
     }
@@ -400,15 +396,13 @@ fn state_after_write_deps(input: &'a Input,
                               hir_map: &'a hir_map::Map<'ast>,
                               krate: &'a ast::Crate,
                               hir_crate: &'a hir::Crate,
-                              crate_name: &'a str,
-                              lcx: &'a LoweringContext<'a>)
+                              crate_name: &'a str)
                               -> CompileState<'a, 'ast, 'tcx> {
         CompileState {
             crate_name: Some(crate_name),
             ast_map: Some(hir_map),
             krate: Some(krate),
             hir_crate: Some(hir_crate),
-            lcx: Some(lcx),
             ..CompileState::empty(input, session, out_dir)
         }
     }
@@ -421,7 +415,6 @@ fn state_after_analysis(input: &'a Input,
                             analysis: &'a ty::CrateAnalysis,
                             mir_map: Option<&'a MirMap<'tcx>>,
                             tcx: &'a TyCtxt<'tcx>,
-                            lcx: &'a LoweringContext<'a>,
                             crate_name: &'a str)
                             -> CompileState<'a, 'ast, 'tcx> {
         CompileState {
@@ -430,7 +423,6 @@ fn state_after_analysis(input: &'a Input,
             tcx: Some(tcx),
             krate: krate,
             hir_crate: Some(hir_crate),
-            lcx: Some(lcx),
             crate_name: Some(crate_name),
             ..CompileState::empty(input, session, out_dir)
         }

src/librustc_driver/lib.rs

@@ -499,7 +499,6 @@ fn build_controller(&mut self, sess: &Session) -> CompileController<'a> {
             control.after_analysis.callback = box |state| {
                 time(state.session.time_passes(), "save analysis", || {
                     save::process_crate(state.tcx.unwrap(),
-                                        state.lcx.unwrap(),
                                         state.krate.unwrap(),
                                         state.analysis.unwrap(),
                                         state.crate_name.unwrap(),

src/librustc_save_analysis/dump_visitor.rs

@@ -42,8 +42,6 @@
 use syntax::print::pprust::{path_to_string, ty_to_string};
 use syntax::ptr::P;
 
-use rustc::hir::lowering::lower_expr;
-
 use super::{escape, generated_code, SaveContext, PathCollector};
 use super::data::*;
 use super::dump::Dump;
@@ -1222,7 +1220,7 @@ fn visit_expr(&mut self, ex: &ast::Expr) {
                 visit::walk_expr(self, ex);
             }
             ast::ExprKind::Struct(ref path, ref fields, ref base) => {
-                let hir_expr = lower_expr(self.save_ctxt.lcx, ex);
+                let hir_expr = self.save_ctxt.tcx.map.expect_expr(ex.id);
                 let adt = self.tcx.expr_ty(&hir_expr).ty_adt_def().unwrap();
                 let def = self.tcx.resolve_expr(&hir_expr);
                 self.process_struct_lit(ex, path, fields, adt.variant_of_def(def), base)
@@ -1241,7 +1239,7 @@ fn visit_expr(&mut self, ex: &ast::Expr) {
             ast::ExprKind::TupField(ref sub_ex, idx) => {
                 self.visit_expr(&sub_ex);
 
-                let hir_node = lower_expr(self.save_ctxt.lcx, sub_ex);
+                let hir_node = self.save_ctxt.tcx.map.expect_expr(sub_ex.id);
                 let ty = &self.tcx.expr_ty_adjusted(&hir_node).sty;
                 match *ty {
                     ty::TyStruct(def, _) => {

src/librustc_save_analysis/lib.rs

@@ -28,7 +28,7 @@
 #[macro_use] extern crate syntax;
 extern crate serialize as rustc_serialize;
 
-use rustc::hir::{self, lowering};
+use rustc::hir;
 use rustc::hir::map::NodeItem;
 use rustc::hir::def::Def;
 use rustc::hir::def_id::DefId;
@@ -75,7 +75,6 @@ pub enum Row {
 
 pub struct SaveContext<'l, 'tcx: 'l> {
     tcx: &'l TyCtxt<'tcx>,
-    lcx: &'l lowering::LoweringContext<'l>,
     span_utils: SpanUtils<'tcx>,
 }
 
@@ -84,20 +83,16 @@ pub struct SaveContext<'l, 'tcx: 'l> {
 );
 
 impl<'l, 'tcx: 'l> SaveContext<'l, 'tcx> {
-    pub fn new(tcx: &'l TyCtxt<'tcx>,
-               lcx: &'l lowering::LoweringContext<'l>)
-               -> SaveContext<'l, 'tcx> {
+    pub fn new(tcx: &'l TyCtxt<'tcx>) -> SaveContext<'l, 'tcx> {
         let span_utils = SpanUtils::new(&tcx.sess);
-        SaveContext::from_span_utils(tcx, lcx, span_utils)
+        SaveContext::from_span_utils(tcx, span_utils)
     }
 
     pub fn from_span_utils(tcx: &'l TyCtxt<'tcx>,
-                           lcx: &'l lowering::LoweringContext<'l>,
                            span_utils: SpanUtils<'tcx>)
                            -> SaveContext<'l, 'tcx> {
         SaveContext {
             tcx: tcx,
-            lcx: lcx,
             span_utils: span_utils,
         }
     }
@@ -378,14 +373,14 @@ pub fn get_trait_ref_data(&self,
     }
 
     pub fn get_expr_data(&self, expr: &ast::Expr) -> Option<Data> {
-        let hir_node = lowering::lower_expr(self.lcx, expr);
+        let hir_node = self.tcx.map.expect_expr(expr.id);
         let ty = self.tcx.expr_ty_adjusted_opt(&hir_node);
         if ty.is_none() || ty.unwrap().sty == ty::TyError {
             return None;
         }
         match expr.node {
             ast::ExprKind::Field(ref sub_ex, ident) => {
-                let hir_node = lowering::lower_expr(self.lcx, sub_ex);
+                let hir_node = self.tcx.map.expect_expr(sub_ex.id);
                 match self.tcx.expr_ty_adjusted(&hir_node).sty {
                     ty::TyStruct(def, _) => {
                         let f = def.struct_variant().field_named(ident.node.name);
@@ -405,7 +400,7 @@ pub fn get_expr_data(&self, expr: &ast::Expr) -> Option<Data> {
                 }
             }
             ast::ExprKind::Struct(ref path, _, _) => {
-                let hir_node = lowering::lower_expr(self.lcx, expr);
+                let hir_node = self.tcx.map.expect_expr(expr.id);
                 match self.tcx.expr_ty_adjusted(&hir_node).sty {
                     ty::TyStruct(def, _) => {
                         let sub_span = self.span_utils.span_for_last_ident(path.span);
@@ -704,7 +699,6 @@ fn extension(&self) -> &'static str {
 }
 
 pub fn process_crate<'l, 'tcx>(tcx: &'l TyCtxt<'tcx>,
-                               lcx: &'l lowering::LoweringContext<'l>,
                                krate: &ast::Crate,
                                analysis: &'l ty::CrateAnalysis<'l>,
                                cratename: &str,
@@ -755,7 +749,7 @@ pub fn process_crate<'l, 'tcx>(tcx: &'l TyCtxt<'tcx>,
     let output = &mut output_file;
 
     let utils: SpanUtils<'tcx> = SpanUtils::new(&tcx.sess);
-    let save_ctxt = SaveContext::new(tcx, lcx);
+    let save_ctxt = SaveContext::new(tcx);
 
     macro_rules! dump {
         ($new_dumper: expr) => {{