From d5316163b66e194b2418bfe2cdc43cf2cc61afc2 Mon Sep 17 00:00:00 2001
From: Yuki Okushi <huyuumi.dev@gmail.com>
Date: Mon, 23 Dec 2019 08:39:33 +0900
Subject: [PATCH] Rustup to rust-lang/rust#66877

---
 clippy_lints/src/consts.rs     | 15 ++++++---------
 clippy_lints/src/enum_clike.rs | 11 +----------
 2 files changed, 7 insertions(+), 19 deletions(-)

diff --git a/clippy_lints/src/consts.rs b/clippy_lints/src/consts.rs
index de1c61a6f633..5d62a7d51356 100644
--- a/clippy_lints/src/consts.rs
+++ b/clippy_lints/src/consts.rs
@@ -6,7 +6,7 @@ use rustc::hir::def::{DefKind, Res};
 use rustc::hir::*;
 use rustc::lint::LateContext;
 use rustc::ty::subst::{Subst, SubstsRef};
-use rustc::ty::{self, Instance, Ty, TyCtxt};
+use rustc::ty::{self, Ty, TyCtxt};
 use rustc::{bug, span_bug};
 use rustc_data_structures::sync::Lrc;
 use std::cmp::Ordering::{self, Equal};
@@ -328,8 +328,6 @@ impl<'c, 'cc> ConstEvalLateContext<'c, 'cc> {
 
     /// Lookup a possibly constant expression from a `ExprKind::Path`.
     fn fetch_path(&mut self, qpath: &QPath, id: HirId) -> Option<Constant> {
-        use rustc::mir::interpret::GlobalId;
-
         let res = self.tables.qpath_res(qpath, id);
         match res {
             Res::Def(DefKind::Const, def_id) | Res::Def(DefKind::AssocConst, def_id) => {
@@ -339,13 +337,12 @@ impl<'c, 'cc> ConstEvalLateContext<'c, 'cc> {
                 } else {
                     substs.subst(self.lcx.tcx, self.substs)
                 };
-                let instance = Instance::resolve(self.lcx.tcx, self.param_env, def_id, substs)?;
-                let gid = GlobalId {
-                    instance,
-                    promoted: None,
-                };
 
-                let result = self.lcx.tcx.const_eval(self.param_env.and(gid)).ok()?;
+                let result = self
+                    .lcx
+                    .tcx
+                    .const_eval_resolve(self.param_env, def_id, substs, None)
+                    .ok()?;
                 let result = miri_to_const(&result);
                 if result.is_some() {
                     self.needed_resolution = true;
diff --git a/clippy_lints/src/enum_clike.rs b/clippy_lints/src/enum_clike.rs
index 33ddf69fa51f..aaa391077aab 100644
--- a/clippy_lints/src/enum_clike.rs
+++ b/clippy_lints/src/enum_clike.rs
@@ -6,9 +6,7 @@ use crate::utils::span_lint;
 use rustc::declare_lint_pass;
 use rustc::hir::*;
 use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
-use rustc::mir::interpret::GlobalId;
 use rustc::ty;
-use rustc::ty::subst::InternalSubsts;
 use rustc::ty::util::IntTypeExt;
 use rustc_session::declare_tool_lint;
 use std::convert::TryFrom;
@@ -48,15 +46,8 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnportableVariant {
         if let ItemKind::Enum(def, _) = &item.kind {
             for var in def.variants {
                 if let Some(anon_const) = &var.disr_expr {
-                    let param_env = ty::ParamEnv::empty();
                     let def_id = cx.tcx.hir().body_owner_def_id(anon_const.body);
-                    let substs = InternalSubsts::identity_for_item(cx.tcx, def_id);
-                    let instance = ty::Instance::new(def_id, substs);
-                    let c_id = GlobalId {
-                        instance,
-                        promoted: None,
-                    };
-                    let constant = cx.tcx.const_eval(param_env.and(c_id)).ok();
+                    let constant = cx.tcx.const_eval_poly(def_id).ok();
                     if let Some(Constant::Int(val)) = constant.and_then(miri_to_const) {
                         let mut ty = cx.tcx.type_of(def_id);
                         if let ty::Adt(adt, _) = ty.kind {