Make needs_analysis true for PpHirMode::Typed.

This avoids the need for a bespoke `tcx.analysis()` call.

Author: nnethercote

Diff for: compiler/rustc_driver_impl/src/pretty.rs

@@ -297,7 +297,6 @@ pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
                     f(&annotation)
                 }
                 PpHirMode::Typed => {
-                    abort_on_err(tcx.analysis(()), tcx.sess);
                     let annotation = TypedAnnotation { tcx, maybe_typeck_results: Cell::new(None) };
                     tcx.dep_graph.with_ignore(|| f(&annotation))
                 }

Diff for: compiler/rustc_session/src/config.rs

@@ -3144,7 +3144,7 @@ impl PpMode {
 
     pub fn needs_analysis(&self) -> bool {
         use PpMode::*;
-        matches!(*self, Mir | MirCFG | ThirTree | ThirFlat)
+        matches!(*self, Hir(PpHirMode::Typed) | Mir | MirCFG | ThirTree | ThirFlat)
     }
 }