Rollup merge of #146601 - Enselic:fix-test-args, r=Mark-Simulacrum

compiletest: Make `./x test --test-args ...` work again

It accidentally broke with  #146501. The intention of that PR was to keep existing behavior if `--exact` is not used, but it had a bug. This PR fixes that bug.

Author: Zalathar

src/tools/compiletest/src/executor.rs

@@ -295,11 +295,14 @@ fn filter_tests(opts: &Config, tests: Vec<CollectedTest>) -> Vec<CollectedTest>
     let mut filtered = tests;
 
     let matches_filter = |test: &CollectedTest, filter_str: &str| {
-        let filterable_path = test.desc.filterable_path.as_str();
         if opts.filter_exact {
-            filterable_path == filter_str
+            // When `--exact` is used we must use `filterable_path` to get
+            // reasonable filtering behavior.
+            test.desc.filterable_path.as_str() == filter_str
         } else {
-            filterable_path.contains(filter_str)
+            // For compatibility we use the name (which includes the full path)
+            // if `--exact` is not used.
+            test.desc.name.contains(filter_str)
         }
     };