Auto merge of #70297 - nnethercote:clean-up-debugging-options, r=mich…

…aelwoerister

Clean up debugging options

I found various sub-optimal things when I was looking at option handling.

src/librustc/ty/query/plumbing.rs

@@ -615,9 +615,7 @@ impl<'tcx> TyCtxt<'tcx> {
         debug_assert!(self.dep_graph.is_green(dep_node));
 
         // First we try to load the result from the on-disk cache.
-        let result = if Q::cache_on_disk(self, key.clone(), None)
-            && self.sess.opts.debugging_opts.incremental_queries
-        {
+        let result = if Q::cache_on_disk(self, key.clone(), None) {
             let prof_timer = self.prof.incr_cache_loading();
             let result = Q::try_load_from_disk(self, prev_dep_node_index);
             prof_timer.finish_with_query_invocation_id(dep_node_index.into());

src/librustc_codegen_llvm/llvm_util.rs

@@ -80,8 +80,7 @@ unsafe fn configure_llvm(sess: &Session) {
         if sess.print_llvm_passes() {
             add("-debug-pass=Structure", false);
         }
-
-        if sess.opts.debugging_opts.generate_arange_section {
+        if !sess.opts.debugging_opts.no_generate_arange_section {
             add("-generate-arange-section", false);
         }
         if get_major_version() >= 8 {

src/librustc_incremental/persist/load.rs

@@ -195,7 +195,7 @@ pub fn load_dep_graph(sess: &Session) -> DepGraphFuture {
 }
 
 pub fn load_query_result_cache(sess: &Session) -> OnDiskCache<'_> {
-    if sess.opts.incremental.is_none() || !sess.opts.debugging_opts.incremental_queries {
+    if sess.opts.incremental.is_none() {
         return OnDiskCache::new_empty(sess.source_map());
     }
 

src/librustc_incremental/persist/save.rs

@@ -31,11 +31,9 @@ pub fn save_dep_graph(tcx: TyCtxt<'_>) {
 
         join(
             move || {
-                if tcx.sess.opts.debugging_opts.incremental_queries {
-                    sess.time("incr_comp_persist_result_cache", || {
-                        save_in(sess, query_cache_path, |e| encode_query_cache(tcx, e));
-                    });
-                }
+                sess.time("incr_comp_persist_result_cache", || {
+                    save_in(sess, query_cache_path, |e| encode_query_cache(tcx, e));
+                });
             },
             || {
                 sess.time("incr_comp_persist_dep_graph", || {

src/librustc_interface/tests.rs

@@ -546,8 +546,6 @@ fn test_debugging_options_tracking_hash() {
     assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
     opts.debugging_opts.parse_only = true;
     assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
-    opts.debugging_opts.incremental = Some(String::from("abc"));
-    assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
     opts.debugging_opts.dump_dep_graph = true;
     assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
     opts.debugging_opts.query_dep_graph = true;
@@ -560,8 +558,6 @@ fn test_debugging_options_tracking_hash() {
     assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
     opts.debugging_opts.keep_hygiene_data = true;
     assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
-    opts.debugging_opts.keep_ast = true;
-    assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
     opts.debugging_opts.print_mono_items = Some(String::from("abc"));
     assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
     opts.debugging_opts.dump_mir = Some(String::from("abc"));

src/librustc_session/config.rs

@@ -1286,33 +1286,6 @@ fn check_thread_count(debugging_opts: &DebuggingOptions, error_format: ErrorOutp
     }
 }
 
-fn select_incremental_path(
-    debugging_opts: &DebuggingOptions,
-    cg: &CodegenOptions,
-    error_format: ErrorOutputType,
-) -> Option<PathBuf> {
-    match (&debugging_opts.incremental, &cg.incremental) {
-        (Some(path1), Some(path2)) => {
-            if path1 != path2 {
-                early_error(
-                    error_format,
-                    &format!(
-                        "conflicting paths for `-Z incremental` and \
-                         `-C incremental` specified: {} versus {}",
-                        path1, path2
-                    ),
-                );
-            } else {
-                Some(path1)
-            }
-        }
-        (Some(path), None) => Some(path),
-        (None, Some(path)) => Some(path),
-        (None, None) => None,
-    }
-    .map(PathBuf::from)
-}
-
 fn collect_print_requests(
     cg: &mut CodegenOptions,
     dopts: &mut DebuggingOptions,
@@ -1677,7 +1650,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
 
     check_thread_count(&debugging_opts, error_format);
 
-    let incremental = select_incremental_path(&debugging_opts, &cg, error_format);
+    let incremental = cg.incremental.as_ref().map(|m| PathBuf::from(m));
 
     if debugging_opts.profile && incremental.is_some() {
         early_error(

src/librustc_session/options.rs

@@ -299,6 +299,9 @@ macro_rules! options {
             }
         )*
 
+        /// Set a flag to true. Note that it cannot set the flag to false, so
+        /// using this parser in combination with a flag that defaults to true
+        /// is useless; the flag will always be true.
         fn parse_bool(slot: &mut bool, v: Option<&str>) -> bool {
             match v {
                 Some(..) => false,
@@ -786,14 +789,8 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         "support compiling tests with panic=abort"),
     dep_tasks: bool = (false, parse_bool, [UNTRACKED],
         "print tasks that execute and the color their dep node gets (requires debug build)"),
-    incremental: Option<String> = (None, parse_opt_string, [UNTRACKED],
-        "enable incremental compilation (experimental)"),
-    incremental_queries: bool = (true, parse_bool, [UNTRACKED],
-        "enable incremental compilation support for queries (experimental)"),
     incremental_info: bool = (false, parse_bool, [UNTRACKED],
         "print high-level information about incremental reuse (or the lack thereof)"),
-    incremental_dump_hash: bool = (false, parse_bool, [UNTRACKED],
-        "dump hash information in textual format to stdout"),
     incremental_verify_ich: bool = (false, parse_bool, [UNTRACKED],
         "verify incr. comp. hashes of green query instances"),
     incremental_ignore_spans: bool = (false, parse_bool, [UNTRACKED],
@@ -814,12 +811,10 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         "for every macro invocation, print its name and arguments"),
     debug_macros: bool = (false, parse_bool, [TRACKED],
         "emit line numbers debug info inside macros"),
-    generate_arange_section: bool = (true, parse_bool, [TRACKED],
-        "generate DWARF address ranges for faster lookups"),
+    no_generate_arange_section: bool = (false, parse_bool, [TRACKED],
+        "don't generate DWARF address ranges that give faster lookups"),
     keep_hygiene_data: bool = (false, parse_bool, [UNTRACKED],
         "don't clear the hygiene data after analysis"),
-    keep_ast: bool = (false, parse_bool, [UNTRACKED],
-        "keep the AST after lowering it to HIR"),
     show_span: Option<String> = (None, parse_opt_string, [TRACKED],
         "show spans for compiler debugging (expr|pat|ty)"),
     print_type_sizes: bool = (false, parse_bool, [UNTRACKED],
@@ -854,8 +849,6 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         "print some statistics about AST and HIR"),
     always_encode_mir: bool = (false, parse_bool, [TRACKED],
         "encode MIR of all functions into the crate metadata"),
-    json_rendered: Option<String> = (None, parse_opt_string, [UNTRACKED],
-        "describes how to render the `rendered` field of json diagnostics"),
     unleash_the_miri_inside_of_you: bool = (false, parse_bool, [TRACKED],
         "take the breaks off const evaluation. NOTE: this is unsound"),
     osx_rpath_install_name: bool = (false, parse_bool, [TRACKED],
@@ -886,8 +879,6 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         "emit diagnostics rather than buffering (breaks NLL error downgrading, sorting)."),
     polonius: bool = (false, parse_bool, [UNTRACKED],
         "enable polonius-based borrow-checker"),
-    codegen_time_graph: bool = (false, parse_bool, [UNTRACKED],
-        "generate a graphical HTML report of time spent in codegen and LLVM"),
     thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
         "enable ThinLTO when possible"),
     inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],

src/test/codegen-units/partitioning/extern-drop-glue.rs

@@ -1,9 +1,9 @@
 // ignore-tidy-linelength
 
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
 // We specify opt-level=0 because `drop_in_place` is `Internal` when optimizing
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/extern-drop-glue
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/extern-drop-glue
 // compile-flags:-Zinline-in-all-cgus -Copt-level=0
 
 #![allow(dead_code)]

src/test/codegen-units/partitioning/extern-generic.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=eager -Zincremental=tmp/partitioning-tests/extern-generic -Zshare-generics=y
+// compile-flags:-Zprint-mono-items=eager -Cincremental=tmp/partitioning-tests/extern-generic -Zshare-generics=y
 
 #![allow(dead_code)]
 #![crate_type="lib"]

src/test/codegen-units/partitioning/inlining-from-extern-crate.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/inlining-from-extern-crate
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/inlining-from-extern-crate
 // compile-flags:-Zinline-in-all-cgus
 
 #![crate_type="lib"]

src/test/codegen-units/partitioning/local-drop-glue.rs

@@ -1,8 +1,8 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
 // We specify opt-level=0 because `drop_in_place` is `Internal` when optimizing
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/local-drop-glue
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/local-drop-glue
 // compile-flags:-Zinline-in-all-cgus -Copt-level=0
 
 #![allow(dead_code)]

src/test/codegen-units/partitioning/local-generic.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=eager -Zincremental=tmp/partitioning-tests/local-generic
+// compile-flags:-Zprint-mono-items=eager -Cincremental=tmp/partitioning-tests/local-generic
 
 #![allow(dead_code)]
 #![crate_type="lib"]

src/test/codegen-units/partitioning/local-inlining-but-not-all.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/local-inlining-but-not-all
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/local-inlining-but-not-all
 // compile-flags:-Zinline-in-all-cgus=no
 
 #![allow(dead_code)]

src/test/codegen-units/partitioning/local-inlining.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/local-inlining
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/local-inlining
 // compile-flags:-Zinline-in-all-cgus
 
 #![allow(dead_code)]

src/test/codegen-units/partitioning/local-transitive-inlining.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/local-transitive-inlining
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/local-transitive-inlining
 // compile-flags:-Zinline-in-all-cgus
 
 #![allow(dead_code)]

src/test/codegen-units/partitioning/methods-are-with-self-type.rs

@@ -4,9 +4,9 @@
 // ignore-test
 
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/methods-are-with-self-type
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/methods-are-with-self-type
 
 #![allow(dead_code)]
 #![feature(start)]

src/test/codegen-units/partitioning/regular-modules.rs

@@ -1,7 +1,7 @@
 // ignore-tidy-linelength
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=eager -Zincremental=tmp/partitioning-tests/regular-modules
+// compile-flags:-Zprint-mono-items=eager -Cincremental=tmp/partitioning-tests/regular-modules
 
 #![allow(dead_code)]
 #![crate_type="lib"]

src/test/codegen-units/partitioning/shared-generics.rs

@@ -2,7 +2,7 @@
 // no-prefer-dynamic
 // NOTE: We always compile this test with -Copt-level=0 because higher opt-levels
 //       prevent drop-glue from participating in share-generics.
-// compile-flags:-Zprint-mono-items=eager -Zshare-generics=yes -Zincremental=tmp/partitioning-tests/shared-generics-exe -Copt-level=0
+// compile-flags:-Zprint-mono-items=eager -Zshare-generics=yes -Cincremental=tmp/partitioning-tests/shared-generics-exe -Copt-level=0
 
 #![crate_type="rlib"]
 

src/test/codegen-units/partitioning/statics.rs

@@ -1,6 +1,6 @@
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/statics
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/statics
 
 #![crate_type="rlib"]
 

src/test/codegen-units/partitioning/vtable-through-const.rs

@@ -1,8 +1,8 @@
 // ignore-tidy-linelength
 
-// We specify -Z incremental here because we want to test the partitioning for
+// We specify -C incremental here because we want to test the partitioning for
 // incremental compilation
-// compile-flags:-Zprint-mono-items=lazy -Zincremental=tmp/partitioning-tests/vtable-through-const
+// compile-flags:-Zprint-mono-items=lazy -Cincremental=tmp/partitioning-tests/vtable-through-const
 // compile-flags:-Zinline-in-all-cgus
 
 // This test case makes sure, that references made through constants are

src/tools/compiletest/src/runtest.rs

@@ -1852,7 +1852,6 @@ impl<'test> TestCx<'test> {
             if let Some(ref incremental_dir) = self.props.incremental_dir {
                 rustc.args(&["-C", &format!("incremental={}", incremental_dir.display())]);
                 rustc.args(&["-Z", "incremental-verify-ich"]);
-                rustc.args(&["-Z", "incremental-queries"]);
             }
 
             if self.config.mode == CodegenUnits {
@@ -2571,12 +2570,12 @@ impl<'test> TestCx<'test> {
         //   - if `cfail`, expect compilation to fail
         //   - if `rfail`, expect execution to fail
         // - create a directory build/foo/bar.incremental
-        // - compile foo/bar.rs with -Z incremental=.../foo/bar.incremental and -C rpass1
+        // - compile foo/bar.rs with -C incremental=.../foo/bar.incremental and -C rpass1
         //   - because name of revision starts with "rpass", expect success
-        // - compile foo/bar.rs with -Z incremental=.../foo/bar.incremental and -C cfail2
+        // - compile foo/bar.rs with -C incremental=.../foo/bar.incremental and -C cfail2
         //   - because name of revision starts with "cfail", expect an error
         //   - load expected errors as usual, but filter for those that end in `[rfail2]`
-        // - compile foo/bar.rs with -Z incremental=.../foo/bar.incremental and -C rpass3
+        // - compile foo/bar.rs with -C incremental=.../foo/bar.incremental and -C rpass3
         //   - because name of revision starts with "rpass", expect success
         // - execute build/foo/bar.exe and save output
         //