Prune invalid ignore-mode-* directives

These are only valid for coverage test modes.

Author: jieyouxu

src/tools/compiletest/src/command-list.rs

@@ -64,23 +64,8 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "ignore-loongarch64",
     "ignore-macabi",
     "ignore-macos",
-    "ignore-mode-assembly",
-    "ignore-mode-codegen",
-    "ignore-mode-codegen-units",
     "ignore-mode-coverage-map",
     "ignore-mode-coverage-run",
-    "ignore-mode-crashes",
-    "ignore-mode-debuginfo",
-    "ignore-mode-incremental",
-    "ignore-mode-js-doc-test",
-    "ignore-mode-mir-opt",
-    "ignore-mode-pretty",
-    "ignore-mode-run-make",
-    "ignore-mode-run-pass-valgrind",
-    "ignore-mode-rustdoc",
-    "ignore-mode-rustdoc-json",
-    "ignore-mode-ui",
-    "ignore-mode-ui-fulldeps",
     "ignore-msp430",
     "ignore-msvc",
     "ignore-musl",

src/tools/compiletest/src/header/cfg.rs

@@ -1,6 +1,6 @@
 use std::collections::HashSet;
 
-use crate::common::{CompareMode, Config, Debugger, Mode};
+use crate::common::{CompareMode, Config, Debugger};
 use crate::header::IgnoreDecision;
 
 const EXTRA_ARCHS: &[&str] = &["spirv"];
@@ -222,7 +222,7 @@ pub(super) fn parse_cfg_name_directive<'a>(
         name: format!("mode-{}", config.mode.to_str()),
         allowed_names: ContainsPrefixed {
             prefix: "mode-",
-            inner: Mode::STR_VARIANTS,
+            inner: ["coverage-run", "coverage-map"],
         },
         message: "when the test mode is {name}",
     }

src/tools/compiletest/src/header/tests.rs

@@ -1,6 +1,5 @@
 use std::io::Read;
 use std::path::Path;
-use std::str::FromStr;
 
 use super::iter_header;
 use crate::common::{Config, Debugger, Mode};
@@ -574,14 +573,12 @@ fn families() {
 
 #[test]
 fn ignore_mode() {
-    for &mode in Mode::STR_VARIANTS {
+    for mode in ["coverage-map", "coverage-run"] {
         // Indicate profiler support so that "coverage-run" tests aren't skipped.
         let config: Config = cfg().mode(mode).profiler_support(true).build();
         let other = if mode == "coverage-run" { "coverage-map" } else { "coverage-run" };
 
         assert_ne!(mode, other);
-        assert_eq!(config.mode, Mode::from_str(mode).unwrap());
-        assert_ne!(config.mode, Mode::from_str(other).unwrap());
 
         assert!(check_ignore(&config, &format!("//@ ignore-mode-{mode}")));
         assert!(!check_ignore(&config, &format!("//@ ignore-mode-{other}")));