Auto merge of #33228 - nikomatsakis:compiletest-gut, r=acrichto

Move auxiliary directories to live with the tests

This is a step for enabling testing of cross-crate incremental compilation. The idea is that instead of having a central auxiliary directory, when you have a `// aux-build:foo.rs` annotation in the test `run-pass/bar.rs`, it will look in (e.g.) `run-pass/aux/foo.rs`. In general, it looks for an `aux` directory in the same directory as the test. We also ignore the `aux` directories when enumerating the set of tests.

As part of this PR, also refactor `runtest.rs` to use methods on a context, which means we can stop passing around context everywhere.

r? @alexcrichton

Author: bors

mk/tests.mk

@@ -622,7 +622,6 @@ CTEST_COMMON_ARGS$(1)-T-$(2)-H-$(3) = \
         --rustc-path $$(HBIN$(1)_H_$(3))/rustc$$(X_$(3)) \
         --rustdoc-path $$(HBIN$(1)_H_$(3))/rustdoc$$(X_$(3)) \
         --llvm-filecheck $(CFG_LLVM_INST_DIR_$(CFG_BUILD))/bin/FileCheck \
-        --aux-base $$(S)src/test/auxiliary/ \
         --stage-id stage$(1)-$(2) \
         --target $(2) \
         --host $(3) \

src/bootstrap/build/check.rs

@@ -70,7 +70,6 @@ pub fn compiletest(build: &Build,
     cmd.arg("--rustc-path").arg(build.compiler_path(compiler));
     cmd.arg("--rustdoc-path").arg(build.rustdoc(compiler));
     cmd.arg("--src-base").arg(build.src.join("src/test").join(suite));
-    cmd.arg("--aux-base").arg(build.src.join("src/test/auxiliary"));
     cmd.arg("--build-base").arg(testdir(build, compiler.host).join(suite));
     cmd.arg("--stage-id").arg(format!("stage{}-{}", compiler.stage, target));
     cmd.arg("--mode").arg(mode);

src/test/auxiliary/cgu_export_trait_method.rs renamed to src/test/codegen-units/item-collection/auxiliary/cgu_export_trait_method.rs

@@ -0,0 +1,37 @@
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![crate_type = "lib"]
+
+struct Struct(u32);
+
+#[inline(never)]
+pub fn foo<T>(x: T) -> (T, u32, i8) {
+    let (x, Struct(y)) = bar(x);
+    (x, y, 2)
+}
+
+#[inline(never)]
+fn bar<T>(x: T) -> (T, Struct) {
+    let _ = not_exported_and_not_generic(0);
+    (x, Struct(1))
+}
+
+// These should not contribute to the codegen items of other crates.
+#[inline(never)]
+pub fn exported_but_not_generic(x: i32) -> i64 {
+    x as i64
+}
+
+#[inline(never)]
+fn not_exported_and_not_generic(x: u32) -> u64 {
+    x as u64
+}
+