From 59e621c1969fb03c5d367e9c713c0279461e772f Mon Sep 17 00:00:00 2001
From: David Wood <david@davidtw.co>
Date: Fri, 24 Jul 2020 13:16:54 +0100
Subject: interp: needs_subst -> ensure_monomorphic_enough

This commit adds a `ensure_monomorphic_enough` utility function which
checks whether a type needs substitution, but only for parameters
that the `unused_generic_params` query considers used.

`ensure_monomorphic_enough` is then used throughout interpret where
`needs_subst` checks previously existed (in particular, for some
pointer casts and for reflection intrinsics more precise).

Signed-off-by: David Wood <david@davidtw.co>
---
 src/test/ui/issues/issue-74614.rs           |  1 +
 src/test/ui/polymorphization/issue-74636.rs | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 src/test/ui/polymorphization/issue-74636.rs

(limited to 'src/test')

diff --git a/src/test/ui/issues/issue-74614.rs b/src/test/ui/issues/issue-74614.rs
index f5e8deb29fb..8b0c00b1355 100644
--- a/src/test/ui/issues/issue-74614.rs
+++ b/src/test/ui/issues/issue-74614.rs
@@ -1,3 +1,4 @@
+// compile-flags:-Zpolymorphize=on
 // build-pass
 
 fn test<T>() {
diff --git a/src/test/ui/polymorphization/issue-74636.rs b/src/test/ui/polymorphization/issue-74636.rs
new file mode 100644
index 00000000000..4c532f451e3
--- /dev/null
+++ b/src/test/ui/polymorphization/issue-74636.rs
@@ -0,0 +1,16 @@
+// compile-flags:-Zpolymorphize=on
+// build-pass
+
+use std::any::TypeId;
+
+pub fn foo<T: 'static>(_: T) -> TypeId {
+    TypeId::of::<T>()
+}
+
+fn outer<T: 'static>() {
+    foo(|| ());
+}
+
+fn main() {
+    outer::<u8>();
+}
-- 
cgit 1.4.1-3-g733a5