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, 14 insertions, 9 deletions

diff --git a/src/passes/Print.cpp b/src/passes/Print.cpp
index 2a031ad01..01b004d97 100644
--- a/src/passes/Print.cpp
+++ b/src/passes/Print.cpp
@@ -3365,9 +3365,9 @@ public:
 
   bool modifiesBinaryenIR() override { return false; }
 
-  void run(PassRunner* runner, Module* module) override {
+  void run(Module* module) override {
     PrintSExpression print(o);
-    print.setDebugInfo(runner->options.debugInfo);
+    print.setDebugInfo(getPassOptions().debugInfo);
     print.visitModule(module);
   }
 };
@@ -3381,10 +3381,10 @@ public:
   MinifiedPrinter() = default;
   MinifiedPrinter(std::ostream* o) : Printer(o) {}
 
-  void run(PassRunner* runner, Module* module) override {
+  void run(Module* module) override {
     PrintSExpression print(o);
     print.setMinify(true);
-    print.setDebugInfo(runner->options.debugInfo);
+    print.setDebugInfo(getPassOptions().debugInfo);
     print.visitModule(module);
   }
 };
@@ -3398,10 +3398,10 @@ public:
   FullPrinter() = default;
   FullPrinter(std::ostream* o) : Printer(o) {}
 
-  void run(PassRunner* runner, Module* module) override {
+  void run(Module* module) override {
     PrintSExpression print(o);
     print.setFull(true);
-    print.setDebugInfo(runner->options.debugInfo);
+    print.setDebugInfo(getPassOptions().debugInfo);
     print.currModule = module;
     print.visitModule(module);
   }
@@ -3416,9 +3416,9 @@ public:
   PrintStackIR() = default;
   PrintStackIR(std::ostream* o) : Printer(o) {}
 
-  void run(PassRunner* runner, Module* module) override {
+  void run(Module* module) override {
     PrintSExpression print(o);
-    print.setDebugInfo(runner->options.debugInfo);
+    print.setDebugInfo(getPassOptions().debugInfo);
     print.setStackIR(true);
     print.currModule = module;
     print.visitModule(module);
@@ -3603,7 +3603,12 @@ namespace std {
 
 std::ostream& operator<<(std::ostream& o, wasm::Module& module) {
   wasm::PassRunner runner(&module);
-  wasm::Printer(&o).run(&runner, &module);
+  wasm::Printer printer(&o);
+  // Do not use runner.run(), since that will cause an infinite recursion in
+  // BINARYEN_PASS_DEBUG=3, which prints modules (using this function) as part
+  // of running passes.
+  printer.setPassRunner(&runner);
+  printer.run(&module);
   return o;
 }