Combine individual limit queries into single limits query

compiler/rustc_middle/src/ty/context.rs

@@ -53,6 +53,7 @@ use rustc_middle::ty::OpaqueTypeKey;
 use rustc_serialize::opaque::{FileEncodeResult, FileEncoder};
 use rustc_session::config::{BorrowckMode, CrateType, OutputFilenames};
 use rustc_session::lint::{Level, Lint};
+use rustc_session::Limit;
 use rustc_session::Session;
 use rustc_span::def_id::StableCrateId;
 use rustc_span::source_map::MultiSpan;
@@ -1569,6 +1570,22 @@ impl<'tcx> TyCtxt<'tcx> {
             def_kind => (def_kind.article(), def_kind.descr(def_id)),
         }
     }
+
+    pub fn type_length_limit(self) -> Limit {
+        self.limits(()).type_length_limit
+    }
+
+    pub fn recursion_limit(self) -> Limit {
+        self.limits(()).recursion_limit
+    }
+
+    pub fn move_size_limit(self) -> Limit {
+        self.limits(()).move_size_limit
+    }
+
+    pub fn const_eval_limit(self) -> Limit {
+        self.limits(()).const_eval_limit
+    }
 }
 
 /// A trait implemented for all `X<'a>` types that can be safely and

compiler/rustc_middle/src/ty/layout.rs

@@ -221,7 +221,7 @@ fn layout_raw<'tcx>(
     ty::tls::with_related_context(tcx, move |icx| {
         let (param_env, ty) = query.into_parts();
 
-        if !tcx.recursion_limit(()).value_within_limit(icx.layout_depth) {
+        if !tcx.recursion_limit().value_within_limit(icx.layout_depth) {
             tcx.sess.fatal(&format!("overflow representing the type `{}`", ty));
         }
 

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -1437,7 +1437,7 @@ impl<F: fmt::Write> Printer<'tcx> for FmtPrinter<'_, 'tcx, F> {
     }
 
     fn print_type(mut self, ty: Ty<'tcx>) -> Result<Self::Type, Self::Error> {
-        let type_length_limit = self.tcx.type_length_limit(());
+        let type_length_limit = self.tcx.type_length_limit();
         if type_length_limit.value_within_limit(self.printed_type_count) {
             self.printed_type_count += 1;
             self.pretty_print_type(ty)

compiler/rustc_middle/src/ty/query/mod.rs

@@ -49,7 +49,7 @@ use rustc_serialize::opaque;
 use rustc_session::config::{EntryFnType, OptLevel, OutputFilenames, SymbolManglingVersion};
 use rustc_session::utils::NativeLibKind;
 use rustc_session::CrateDisambiguator;
-use rustc_session::Limit;
+use rustc_session::Limits;
 use rustc_target::spec::PanicStrategy;
 
 use rustc_ast as ast;

compiler/rustc_middle/src/ty/util.rs

@@ -206,7 +206,7 @@ impl<'tcx> TyCtxt<'tcx> {
         mut ty: Ty<'tcx>,
         normalize: impl Fn(Ty<'tcx>) -> Ty<'tcx>,
     ) -> Ty<'tcx> {
-        let recursion_limit = self.recursion_limit(());
+        let recursion_limit = self.recursion_limit();
         for iteration in 0.. {
             if !recursion_limit.value_within_limit(iteration) {
                 return self.ty_error_with_message(