Auto merge of #46492 - eddyb:move-ops, r=arielb1

rustc_mir: don't move temporaries that are still used later.

This should unbreak using the MIR borrow-checker on `libcore` (assuming #46268 is merged).

src/test/run-pass/i128.rs

@@ -10,6 +10,8 @@
 
 // ignore-emscripten i128 doesn't work
 
+// compile-flags: -Z borrowck=compare
+
 #![feature(i128_type, test)]
 
 extern crate test;

src/test/run-pass/u128.rs

@@ -10,6 +10,8 @@
 
 // ignore-emscripten u128 not supported
 
+// compile-flags: -Z borrowck=compare
+
 #![feature(i128_type, test)]
 
 extern crate test;