Refactor interaction between Pass and PassRunner (#5093)

Previously only WalkerPasses had access to the `getPassRunner` and
`getPassOptions` methods. Move those methods to `Pass` so all passes can use
them. As a result, the `PassRunner` passed to `Pass::run` and
`Pass::runOnFunction` is no longer necessary, so remove it.

Also update `Pass::create` to return a unique_ptr, which is more efficient than
having it return a raw pointer only to have the `PassRunner` wrap that raw
pointer in a `unique_ptr`.

Delete the unused template `PassRunner::getLast()`, which looks like it was
intended to enable retrieving previous analyses and has been in the code base
since 2015 but is not implemented anywhere.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/passes/PrintCallGraph.cpp b/src/passes/PrintCallGraph.cpp
index 79938e650..6022c8703 100644
--- a/src/passes/PrintCallGraph.cpp
+++ b/src/passes/PrintCallGraph.cpp
@@ -33,7 +33,7 @@ namespace wasm {
 struct PrintCallGraph : public Pass {
   bool modifiesBinaryenIR() override { return false; }
 
-  void run(PassRunner* runner, Module* module) override {
+  void run(Module* module) override {
     std::ostream& o = std::cout;
     o << "digraph call {\n"
          "  rankdir = LR;\n"