Port tests/run-make-fulldeps/obtain-borrowck to ui-fulldeps

tests/run-make-fulldeps/obtain-borrowck/Makefile

@@ -1,26 +0,0 @@
-include ../../run-make/tools.mk
-
-# This example shows how to implement a rustc driver that retrieves MIR bodies
-# together with the borrow checker information.
-
-# How to run this
-# $ ./x.py test tests/run-make-fulldeps/obtain-borrowck
-
-DRIVER_BINARY := "$(TMPDIR)"/driver
-SYSROOT := $(shell $(RUSTC) --print sysroot)
-
-ifdef IS_WINDOWS
-LIBSTD := -L "$(SYSROOT)\\lib\\rustlib\\$(TARGET)\\lib"
-else
-LIBSTD :=
-endif
-
-all:
-	$(RUSTC) driver.rs -o "$(DRIVER_BINARY)"
-	$(TARGET_RPATH_ENV) "$(DRIVER_BINARY)" --sysroot $(SYSROOT) $(LIBSTD) test.rs -o "$(TMPDIR)/driver_test" > "$(TMPDIR)"/output.stdout
-
-ifdef RUSTC_BLESS_TEST
-	cp "$(TMPDIR)"/output.stdout output.stdout
-else
-	$(DIFF) output.stdout "$(TMPDIR)"/output.stdout
-endif

tests/ui-fulldeps/auxiliary/obtain-borrowck-input.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 trait X {
     fn provided(&self) -> usize {
         5

tests/ui-fulldeps/obtain-borrowck.rs

@@ -1,3 +1,10 @@
+//@ edition: 2021
+//@ run-pass
+//@ check-run-results
+//@ run-flags: --sysroot {{sysroot-base}} --edition=2021 {{src-base}}/auxiliary/obtain-borrowck-input.rs
+//@ ignore-stage1 (requires matching sysroot built with in-tree compiler)
+// ignore-tidy-linelength
+
 #![feature(rustc_private)]
 
 //! This program implements a rustc driver that retrieves MIR bodies with