Stop importing int/float modules in librustc_*

src/librustc_ast/util/comments.rs

@@ -5,7 +5,6 @@ use rustc_span::source_map::SourceMap;
 use rustc_span::{BytePos, CharPos, FileName, Pos};
 
 use log::debug;
-use std::usize;
 
 #[cfg(test)]
 mod tests;

src/librustc_codegen_llvm/intrinsic.rs

@@ -25,7 +25,7 @@ use rustc_span::Span;
 use rustc_target::abi::{self, HasDataLayout, LayoutOf, Primitive};
 
 use std::cmp::Ordering;
-use std::{i128, iter, u128};
+use std::iter;
 
 fn get_simple_intrinsic(cx: &CodegenCx<'ll, '_>, name: &str) -> Option<&'ll Value> {
     let llvm_name = match name {

src/librustc_codegen_ssa/mir/rvalue.rs

@@ -17,8 +17,6 @@ use rustc_span::source_map::{Span, DUMMY_SP};
 use rustc_span::symbol::sym;
 use rustc_target::abi::{Abi, Int, LayoutOf, Variants};
 
-use std::{i128, u128};
-
 impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
     pub fn codegen_rvalue(
         &mut self,

src/librustc_data_structures/graph/implementation/mod.rs

@@ -23,7 +23,6 @@
 use crate::snapshot_vec::{SnapshotVec, SnapshotVecDelegate};
 use rustc_index::bit_set::BitSet;
 use std::fmt::Debug;
-use std::usize;
 
 #[cfg(test)]
 mod tests;

src/librustc_data_structures/profiling.rs

@@ -93,7 +93,6 @@ use std::path::Path;
 use std::process;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
-use std::u32;
 
 use measureme::{EventId, EventIdBuilder, SerializableString, StringId};
 use parking_lot::RwLock;

src/librustc_index/vec.rs

@@ -7,7 +7,6 @@ use std::iter::{self, FromIterator};
 use std::marker::PhantomData;
 use std::ops::{Index, IndexMut, Range, RangeBounds};
 use std::slice;
-use std::u32;
 use std::vec;
 
 /// Represents some newtyped `usize` wrapper.

src/librustc_infer/infer/type_variable.rs

@@ -8,7 +8,6 @@ use rustc_data_structures::unify as ut;
 use std::cmp;
 use std::marker::PhantomData;
 use std::ops::Range;
-use std::u32;
 
 pub struct TypeVariableTable<'tcx> {
     values: sv::SnapshotVec<Delegate>,

src/librustc_lint/types.rs

@@ -21,7 +21,6 @@ use rustc_target::spec::abi::Abi;
 
 use log::debug;
 use std::cmp;
-use std::{f32, f64, i16, i32, i64, i8, u16, u32, u64, u8};
 
 declare_lint! {
     UNUSED_COMPARISONS,

src/librustc_metadata/rmeta/decoder.rs

@@ -42,7 +42,6 @@ use std::io;
 use std::mem;
 use std::num::NonZeroUsize;
 use std::path::Path;
-use std::u32;
 
 pub use cstore_impl::{provide, provide_extern};
 

src/librustc_metadata/rmeta/encoder.rs

@@ -39,7 +39,6 @@ use rustc_target::abi::VariantIdx;
 use std::hash::Hash;
 use std::num::NonZeroUsize;
 use std::path::Path;
-use std::u32;
 
 struct EncodeContext<'tcx> {
     opaque: opaque::Encoder,

src/librustc_middle/mir/mod.rs

@@ -33,7 +33,7 @@ use std::borrow::Cow;
 use std::fmt::{self, Debug, Display, Formatter, Write};
 use std::ops::Index;
 use std::slice;
-use std::{iter, mem, option, u32};
+use std::{iter, mem, option};
 
 pub use self::cache::{BodyAndCache, ReadOnlyBodyAndCache};
 pub use self::query::*;

src/librustc_mir/transform/promote_consts.rs

@@ -27,7 +27,7 @@ use rustc_index::vec::{Idx, IndexVec};
 use rustc_target::spec::abi::Abi;
 
 use std::cell::Cell;
-use std::{cmp, iter, mem, usize};
+use std::{cmp, iter, mem};
 
 use crate::const_eval::{is_const_fn, is_unstable_const_fn};
 use crate::transform::check_consts::{is_lang_panic_fn, qualifs, ConstKind, Item};

src/librustc_mir_build/build/matches/util.rs

@@ -5,7 +5,6 @@ use rustc_middle::mir::*;
 use rustc_middle::ty;
 use smallvec::SmallVec;
 use std::convert::TryInto;
-use std::u32;
 
 impl<'a, 'tcx> Builder<'a, 'tcx> {
     crate fn field_match_pairs<'pat>(

src/librustc_mir_build/build/mod.rs

@@ -17,7 +17,6 @@ use rustc_span::symbol::kw;
 use rustc_span::Span;
 use rustc_target::spec::abi::Abi;
 use rustc_target::spec::PanicStrategy;
-use std::u32;
 
 use super::lints;
 

src/librustc_mir_build/hair/pattern/_match.rs

@@ -256,7 +256,6 @@ use std::convert::TryInto;
 use std::fmt;
 use std::iter::{FromIterator, IntoIterator};
 use std::ops::RangeInclusive;
-use std::u128;
 
 crate fn expand_pattern<'a, 'tcx>(cx: &MatchCheckCtxt<'a, 'tcx>, pat: Pat<'tcx>) -> Pat<'tcx> {
     LiteralExpander { tcx: cx.tcx, param_env: cx.param_env }.fold_pattern(&pat)

src/librustc_passes/liveness.rs

@@ -112,10 +112,10 @@ use rustc_span::symbol::sym;
 use rustc_span::Span;
 
 use std::collections::VecDeque;
+use std::fmt;
 use std::io;
 use std::io::prelude::*;
 use std::rc::Rc;
-use std::{fmt, u32};
 
 #[derive(Copy, Clone, PartialEq)]
 struct Variable(u32);

src/librustc_span/def_id.rs

@@ -7,7 +7,6 @@ use rustc_macros::HashStable_Generic;
 use rustc_serialize::{Decoder, Encoder};
 use std::borrow::Borrow;
 use std::fmt;
-use std::{u32, u64};
 
 rustc_index::newtype_index! {
     pub struct CrateId {