[EH] Change translator option name (WebAssembly#6259)

The previous name feels too verbose and unwieldy.

This also removes the "new-to-old EH" placeholder. I think it'd be
better to add it back when it is actually added.

src/passes/TranslateEH.cpp

@@ -15,7 +15,7 @@
  */
 
 //
-// TranslateEHOldToNew translates the old Phase 3 EH instructions, which include
+// TranslateToNewEH translates the old Phase 3 EH instructions, which include
 // try, catch, catch_all, delegate, and rethrow, into the new EH instructions,
 // which include try_table (with catch / catch_ref / catch_all / catch_all_ref)
 // and throw_ref, passed at the Oct 2023 CG meeting. This translator can be used
@@ -24,12 +24,6 @@
 // end of the Binaryen pipeline to produce binaries for the new spec while the
 // end-to-end toolchain implementation for the new spec is in progress.
 //
-// TODO
-// TranslateEHNewToOld translates the new EH instructions to the old ones. This
-// can be used as a stopgap tool while Binaryen implementation for the whole
-// optimization pipeline is not complete but we need to test our LLVM
-// implementation for the new spec. This has not been implemented yet.
-//
 
 #include <ir/drop.h>
 #include <ir/find_all.h>
@@ -45,8 +39,7 @@ namespace {
 // Translates the old EH instructions (try / catch / catch_all / delegate /
 // rethrow) into the new ones (try_table (+ catch / catch_ref / catch_all /
 // catch_all_ref) / throw_ref).
-struct TranslateEHOldToNew
-  : public WalkerPass<PostWalker<TranslateEHOldToNew>> {
+struct TranslateToNewEH : public WalkerPass<PostWalker<TranslateToNewEH>> {
   bool isFunctionParallel() override { return true; }
 
   // Scans and records which try labels are targeted by delegates and rethrows.
@@ -201,10 +194,8 @@ struct TranslateEHOldToNew
   // exnref) tuples for a short time.
   std::unordered_map<Type, Index> typeToScratchLocal;
 
-  bool refinalize = false;
-
   std::unique_ptr<Pass> create() override {
-    return std::make_unique<TranslateEHOldToNew>();
+    return std::make_unique<TranslateToNewEH>();
   }
 
   // Get a scratch local for a given type. These locals are used to contain
@@ -680,7 +671,6 @@ struct TranslateEHOldToNew
   }
 
   void visitTry(Try* curr) {
-    refinalize = true;
     Builder builder(*getModule());
     Block* outerBlock = nullptr;
     auto it = delegateTargetToBrTarget.find(curr->name);
@@ -807,15 +797,8 @@ struct TranslateEHOldToNew
   }
 };
 
-struct TranslateEHNewToOld
-  : public WalkerPass<PostWalker<TranslateEHNewToOld>> {
-  // TODO
-};
-
 } // namespace
 
-Pass* createTranslateEHOldToNewPass() { return new TranslateEHOldToNew(); }
-
-Pass* createTranslateEHNewToOldPass() { return new TranslateEHNewToOld(); }
+Pass* createTranslateToNewEHPass() { return new TranslateToNewEH(); }
 
 } // namespace wasm

src/passes/pass.cpp

@@ -491,9 +491,9 @@ void PassRegistry::registerPasses() {
   registerPass("strip-target-features",
                "strip the wasm target features section",
                createStripTargetFeaturesPass);
-  registerPass("translate-eh-old-to-new",
+  registerPass("translate-to-new-eh",
                "translate old EH instructions to new ones",
-               createTranslateEHOldToNewPass);
+               createTranslateToNewEHPass);
   registerPass("trap-mode-clamp",
                "replace trapping operations with clamping semantics",
                createTrapModeClamp);

src/passes/passes.h

@@ -164,7 +164,7 @@ Pass* createStripEHPass();
 Pass* createStubUnsupportedJSOpsPass();
 Pass* createSSAifyPass();
 Pass* createSSAifyNoMergePass();
-Pass* createTranslateEHOldToNewPass();
+Pass* createTranslateToNewEHPass();
 Pass* createTrapModeClamp();
 Pass* createTrapModeJS();
 Pass* createTupleOptimizationPass();

test/lit/help/wasm-opt.test

@@ -486,7 +486,7 @@
 ;; CHECK-NEXT:
 ;; CHECK-NEXT:   --symbolmap                                   (alias for print-function-map)
 ;; CHECK-NEXT:
-;; CHECK-NEXT:   --translate-eh-old-to-new                     translate old EH instructions to
+;; CHECK-NEXT:   --translate-to-new-eh                         translate old EH instructions to
 ;; CHECK-NEXT:                                                 new ones
 ;; CHECK-NEXT:
 ;; CHECK-NEXT:   --trap-mode-clamp                             replace trapping operations with

test/lit/help/wasm2js.test

@@ -445,7 +445,7 @@
 ;; CHECK-NEXT:
 ;; CHECK-NEXT:   --symbolmap                                   (alias for print-function-map)
 ;; CHECK-NEXT:
-;; CHECK-NEXT:   --translate-eh-old-to-new                     translate old EH instructions to
+;; CHECK-NEXT:   --translate-to-new-eh                         translate old EH instructions to
 ;; CHECK-NEXT:                                                 new ones
 ;; CHECK-NEXT:
 ;; CHECK-NEXT:   --trap-mode-clamp                             replace trapping operations with

test/lit/passes/translate-eh-old-to-new.wast → test/lit/passes/translate-to-new-eh.wast

@@ -1,5 +1,5 @@
 ;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
-;; RUN: wasm-opt %s -all --translate-eh-old-to-new -S -o - | filecheck %s
+;; RUN: wasm-opt %s -all --translate-to-new-eh -S -o - | filecheck %s
 
 (module
   ;; CHECK:      (type $0 (func (result i32 i64)))