Auto merge of #28138 - nrc:hir, r=nikomatsakis

r? @nikomatsakis 

Trying to land this first stab, which basically just duplicates the AST. Will file issues for the various things I've got in mind to improve.

Author: bors

mk/crates.mk

@@ -56,7 +56,7 @@ TARGET_CRATES := libc std flate arena term \
 		 alloc_system
 RUSTC_CRATES := rustc rustc_typeck rustc_borrowck rustc_resolve rustc_driver \
                 rustc_trans rustc_back rustc_llvm rustc_privacy rustc_lint \
-                rustc_data_structures rustc_platform_intrinsics
+                rustc_data_structures rustc_front rustc_platform_intrinsics
 HOST_CRATES := syntax $(RUSTC_CRATES) rustdoc fmt_macros
 TOOLS := compiletest rustdoc rustc rustbook error-index-generator
 
@@ -71,23 +71,24 @@ DEPS_graphviz := std
 DEPS_syntax := std term serialize log fmt_macros arena libc rustc_bitflags
 DEPS_rustc_driver := arena flate getopts graphviz libc rustc rustc_back rustc_borrowck \
                      rustc_typeck rustc_resolve log syntax serialize rustc_llvm \
-		     rustc_trans rustc_privacy rustc_lint
+		             rustc_trans rustc_privacy rustc_lint rustc_front
 
 DEPS_rustc_trans := arena flate getopts graphviz libc rustc rustc_back \
-	                log syntax serialize rustc_llvm rustc_platform_intrinsics
-DEPS_rustc_typeck := rustc syntax rustc_platform_intrinsics
-DEPS_rustc_borrowck := rustc log graphviz syntax
-DEPS_rustc_resolve := rustc log syntax
-DEPS_rustc_privacy := rustc log syntax
+	                log syntax serialize rustc_llvm rustc_front rustc_platform_intrinsics
+DEPS_rustc_typeck := rustc syntax rustc_front rustc_platform_intrinsics
+DEPS_rustc_borrowck := rustc rustc_front log graphviz syntax
+DEPS_rustc_resolve := rustc rustc_front log syntax
+DEPS_rustc_privacy := rustc rustc_front log syntax
 DEPS_rustc_lint := rustc log syntax
 DEPS_rustc := syntax flate arena serialize getopts rbml \
               log graphviz rustc_llvm rustc_back rustc_data_structures
 DEPS_rustc_llvm := native:rustllvm libc std rustc_bitflags
 DEPS_rustc_platform_intrinsics := rustc rustc_llvm
-DEPS_rustc_back := std syntax rustc_llvm flate log libc
+DEPS_rustc_back := std syntax rustc_llvm rustc_front flate log libc
+DEPS_rustc_front := std syntax log serialize
 DEPS_rustc_data_structures := std log serialize
 DEPS_rustdoc := rustc rustc_driver native:hoedown serialize getopts \
-                test rustc_lint
+                test rustc_lint rustc_front
 DEPS_rustc_bitflags := core
 DEPS_flate := std native:miniz
 DEPS_arena := std

src/compiletest/runtest.rs

@@ -268,7 +268,7 @@ fn run_pretty_test(config: &Config, props: &TestProps, testfile: &Path) {
         // FIXME (#9639): This needs to handle non-utf8 paths
         let mut args = vec!("-".to_owned(),
                             "-Zunstable-options".to_owned(),
-                            "--pretty".to_owned(),
+                            "--unpretty".to_owned(),
                             pretty_type,
                             format!("--target={}", config.target),
                             "-L".to_owned(),