[llvm] [llvm-reduce]: print short form, actionable names in the log (PR #133561)

[Matt Arsenault via llvm-commits]

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@@ -180,11 +181,10 @@ using SharedTaskQueue = std::deque<std::shared_future<SmallString<0>>>;
 /// reduces the amount of chunks that are considered interesting by the
 /// given test. The number of chunks is determined by a preliminary run of the
 /// reduction pass where no change must be made to the module.
-void llvm::runDeltaPass(TestRunner &Test, ReductionFunc ExtractChunksFromModule,
-                        StringRef Message) {
+void llvm::runDeltaPass(TestRunner &Test, const DeltaPass &Pass) {
   assert(!Test.getProgram().verify(&errs()) &&
          "input module is broken before making changes");
-  errs() << "*** " << Message << "...\n";
+  errs() << "*** " << Pass.Desc << " (" << Pass.Name << ')' << "...\n";
----------------
arsenm wrote:

```suggestion
  errs() << "*** " << Pass.Desc << " (" << Pass.Name << ")...\n";
```

https://github.com/llvm/llvm-project/pull/133561