Rollup merge of #123146 - jieyouxu:use-compiletest-directives, r=clubby789

Use compiletest directives instead of manually checking TARGET / tools

Changes:

- Accept `ignore-wasm32-wasip1` and `needs-wasmtime` directives.
- Add support for needing `wasmtime` as a runner.
- Update wasm/compiler_builtin tests to use compiletest directives over manual checks.

Author: matthiaskrgr

src/tools/compiletest/src/header.rs

@@ -691,9 +691,9 @@ pub fn line_directive<'line>(
     }
 }
 
-/// This is generated by collecting directives from ui tests and then extracting their directive
-/// names. This is **not** an exhaustive list of all possible directives. Instead, this is a
-/// best-effort approximation for diagnostics.
+/// This was originally generated by collecting directives from ui tests and then extracting their
+/// directive names. This is **not** an exhaustive list of all possible directives. Instead, this is
+/// a best-effort approximation for diagnostics. Add new headers to this list when needed.
 const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     // tidy-alphabetical-start
     "assembly-output",
@@ -837,6 +837,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "needs-sanitizer-thread",
     "needs-threads",
     "needs-unwind",
+    "needs-wasmtime",
     "needs-xray",
     "no-prefer-dynamic",
     "normalize-stderr-32bit",
@@ -872,6 +873,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "only-unix",
     "only-wasm32",
     "only-wasm32-bare",
+    "only-wasm32-wasip1",
     "only-windows",
     "only-x86",
     "only-x86_64",

src/tools/compiletest/src/header/needs.rs

@@ -149,6 +149,11 @@ pub(super) fn handle_needs(
             condition: config.target_cfg().relocation_model == "pic",
             ignore_reason: "ignored on targets without PIC relocation model",
         },
+        Need {
+            name: "needs-wasmtime",
+            condition: config.runner.as_ref().is_some_and(|r| r.contains("wasmtime")),
+            ignore_reason: "ignored when wasmtime runner is not available",
+        },
     ];
 
     let (name, comment) = match ln.split_once([':', ' ']) {

tests/run-make/compiler-builtins/rmake.rs

@@ -8,6 +8,10 @@
 //! settings. Turning off optimizations and enabling debug assertions tends to produce the most
 //! dependence on core that is possible, so that is the configuration we test here.
 
+// wasm and nvptx targets don't produce rlib files that object can parse.
+//@ ignore-wasm
+//@ ignore-nvptx64
+
 #![deny(warnings)]
 
 extern crate run_make_support;
@@ -33,10 +37,6 @@ path = "lib.rs""#;
 fn main() {
     let target_dir = tmp_dir().join("target");
     let target = std::env::var("TARGET").unwrap();
-    if target.starts_with("wasm") || target.starts_with("nvptx") {
-        // wasm and nvptx targets don't produce rlib files that object can parse.
-        return;
-    }
 
     println!("Testing compiler_builtins for {}", target);
 

tests/run-make/wasm-abi/rmake.rs

@@ -1,27 +1,17 @@
+//@ only-wasm32-wasip1
+//@ needs-wasmtime
+
 extern crate run_make_support;
 
 use run_make_support::{rustc, tmp_dir};
 use std::path::Path;
 use std::process::Command;
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     rustc().input("foo.rs").target("wasm32-wasip1").run();
 
     let file = tmp_dir().join("foo.wasm");
 
-    let has_wasmtime = match Command::new("wasmtime").arg("--version").output() {
-        Ok(s) => s.status.success(),
-        _ => false,
-    };
-    if !has_wasmtime {
-        println!("skipping test, wasmtime isn't available");
-        return;
-    }
-
     run(&file, "return_two_i32", "1\n2\n");
     run(&file, "return_two_i64", "3\n4\n");
     run(&file, "return_two_f32", "5\n6\n");

tests/run-make/wasm-custom-section/rmake.rs

@@ -1,13 +1,10 @@
+//@ only-wasm32-wasip1
 extern crate run_make_support;
 
 use run_make_support::{rustc, tmp_dir, wasmparser};
 use std::collections::HashMap;
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     rustc().input("foo.rs").target("wasm32-wasip1").run();
     rustc().input("bar.rs").target("wasm32-wasip1").arg("-Clto").opt().run();
 

tests/run-make/wasm-custom-sections-opt/rmake.rs

@@ -1,14 +1,11 @@
+//@ only-wasm32-wasip1
 extern crate run_make_support;
 
 use run_make_support::{tmp_dir, wasmparser, rustc};
 use std::collections::HashMap;
 use std::path::Path;
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     rustc().input("foo.rs").target("wasm32-wasip1").opt().run();
 
     verify(&tmp_dir().join("foo.wasm"));

tests/run-make/wasm-export-all-symbols/rmake.rs

@@ -1,3 +1,5 @@
+//@ only-wasm32-wasip1
+
 extern crate run_make_support;
 
 use run_make_support::{tmp_dir, wasmparser, rustc};
@@ -6,10 +8,6 @@ use std::path::Path;
 use wasmparser::ExternalKind::*;
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     test(&[]);
     test(&["-O"]);
     test(&["-Clto"]);

tests/run-make/wasm-import-module/rmake.rs

@@ -1,14 +1,12 @@
+//@ only-wasm32-wasip1
+
 extern crate run_make_support;
 
 use run_make_support::{tmp_dir, wasmparser, rustc};
 use std::collections::HashMap;
 use wasmparser::TypeRef::Func;
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     rustc().input("foo.rs").target("wasm32-wasip1").run();
     rustc()
         .input("bar.rs")

tests/run-make/wasm-panic-small/rmake.rs

@@ -1,14 +1,11 @@
+//@ only-wasm32-wasip1
 #![deny(warnings)]
 
 extern crate run_make_support;
 
 use run_make_support::{rustc, tmp_dir};
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     test("a");
     test("b");
     test("c");

tests/run-make/wasm-spurious-import/rmake.rs

@@ -1,13 +1,11 @@
+//@ only-wasm32-wasip1
+
 extern crate run_make_support;
 
 use run_make_support::{rustc, tmp_dir, wasmparser};
 use std::collections::HashMap;
 
 fn main() {
-    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
-        return;
-    }
-
     rustc()
         .input("main.rs")
         .target("wasm32-wasip1")