add has_enzyme/needs-enzyme to the test infra

5 files changed, 15 insertions, 0 deletions

diff --git a/src/tools/compiletest/src/command-list.rs b/src/tools/compiletest/src/command-list.rs
index 865aa76ddb0..a4cedbf66e2 100644
--- a/src/tools/compiletest/src/command-list.rs
+++ b/src/tools/compiletest/src/command-list.rs
@@ -139,6 +139,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "needs-deterministic-layouts",
     "needs-dlltool",
     "needs-dynamic-linking",
+    "needs-enzyme",
     "needs-force-clang-based-tests",
     "needs-git-hash",
     "needs-llvm-components",
diff --git a/src/tools/compiletest/src/common.rs b/src/tools/compiletest/src/common.rs
index 2d8c0c3fa5e..adc89cad72f 100644
--- a/src/tools/compiletest/src/common.rs
+++ b/src/tools/compiletest/src/common.rs
@@ -349,6 +349,9 @@ pub struct Config {
     /// whether to run `tidy` when a rustdoc test fails
     pub has_tidy: bool,
 
+    /// whether to run `enzyme` autodiff tests
+    pub has_enzyme: bool,
+
     /// The current Rust channel
     pub channel: String,
 
diff --git a/src/tools/compiletest/src/header.rs b/src/tools/compiletest/src/header.rs
index 6a889d27793..83a10c56208 100644
--- a/src/tools/compiletest/src/header.rs
+++ b/src/tools/compiletest/src/header.rs
@@ -218,6 +218,8 @@ pub struct TestProps {
     pub filecheck_flags: Vec<String>,
     /// Don't automatically insert any `--check-cfg` args
     pub no_auto_check_cfg: bool,
+    /// Run tests which require enzyme being build
+    pub has_enzyme: bool,
 }
 
 mod directives {
@@ -322,6 +324,7 @@ impl TestProps {
             llvm_cov_flags: vec![],
             filecheck_flags: vec![],
             no_auto_check_cfg: false,
+            has_enzyme: false,
         }
     }
 
diff --git a/src/tools/compiletest/src/header/needs.rs b/src/tools/compiletest/src/header/needs.rs
index 99c0e850f1a..f5dd722ed37 100644
--- a/src/tools/compiletest/src/header/needs.rs
+++ b/src/tools/compiletest/src/header/needs.rs
@@ -80,6 +80,11 @@ pub(super) fn handle_needs(
             ignore_reason: "ignored on targets without SafeStack support",
         },
         Need {
+            name: "needs-enzyme",
+            condition: config.has_enzyme,
+            ignore_reason: "ignored when LLVM Enzyme is disabled",
+        },
+        Need {
             name: "needs-run-enabled",
             condition: config.run_enabled(),
             ignore_reason: "ignored when running the resulting test binaries is disabled",
diff --git a/src/tools/compiletest/src/lib.rs b/src/tools/compiletest/src/lib.rs
index cfc619f9342..a8355ee9590 100644
--- a/src/tools/compiletest/src/lib.rs
+++ b/src/tools/compiletest/src/lib.rs
@@ -83,6 +83,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
         )
         .optopt("", "run", "whether to execute run-* tests", "auto | always | never")
         .optflag("", "ignored", "run tests marked as ignored")
+        .optflag("", "has-enzyme", "run tests that require enzyme")
         .optflag("", "with-debug-assertions", "whether to run tests with `ignore-debug` header")
         .optmulti(
             "",
@@ -233,6 +234,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
         // Avoid spawning an external command when we know tidy won't be used.
         false
     };
+    let has_enzyme = matches.opt_present("has-enzyme");
     let filters = if mode == Mode::RunMake {
         matches
             .free
@@ -331,6 +333,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
             .map(|s| s.parse().expect("invalid --compare-mode provided")),
         rustfix_coverage: matches.opt_present("rustfix-coverage"),
         has_tidy,
+        has_enzyme,
         channel: matches.opt_str("channel").unwrap(),
         git_hash: matches.opt_present("git-hash"),
         edition: matches.opt_str("edition"),