[WebAssembly] Rename event to tag

We recently decided to change 'event' to 'tag', and 'event section' to
'tag section', out of the rationale that the section contains a
generalized tag that references a type, which may be used for something
other than exceptions, and the name 'event' can be confusing in the web
context.

See
- https://github.com/WebAssembly/exception-handling/issues/159#issuecomment-857910130
- https://github.com/WebAssembly/exception-handling/pull/161

Reviewed By: tlively

Differential Revision: https://reviews.llvm.org/D104423

2 files changed, 33 insertions, 33 deletions

diff --git a/llvm/lib/ObjectYAML/WasmEmitter.cpp b/llvm/lib/ObjectYAML/WasmEmitter.cpp
index acc5dff..888ba11 100644
--- a/llvm/lib/ObjectYAML/WasmEmitter.cpp
+++ b/llvm/lib/ObjectYAML/WasmEmitter.cpp
@@ -41,7 +41,7 @@ private:
   void writeSectionContent(raw_ostream &OS, WasmYAML::FunctionSection &Section);
   void writeSectionContent(raw_ostream &OS, WasmYAML::TableSection &Section);
   void writeSectionContent(raw_ostream &OS, WasmYAML::MemorySection &Section);
-  void writeSectionContent(raw_ostream &OS, WasmYAML::EventSection &Section);
+  void writeSectionContent(raw_ostream &OS, WasmYAML::TagSection &Section);
   void writeSectionContent(raw_ostream &OS, WasmYAML::GlobalSection &Section);
   void writeSectionContent(raw_ostream &OS, WasmYAML::ExportSection &Section);
   void writeSectionContent(raw_ostream &OS, WasmYAML::StartSection &Section);
@@ -61,7 +61,7 @@ private:
   uint32_t NumImportedFunctions = 0;
   uint32_t NumImportedGlobals = 0;
   uint32_t NumImportedTables = 0;
-  uint32_t NumImportedEvents = 0;
+  uint32_t NumImportedTags = 0;
 
   bool HasError = false;
   yaml::ErrorHandler ErrHandler;
@@ -189,7 +189,7 @@ void WasmWriter::writeSectionContent(raw_ostream &OS,
       case wasm::WASM_SYMBOL_TYPE_FUNCTION:
       case wasm::WASM_SYMBOL_TYPE_GLOBAL:
       case wasm::WASM_SYMBOL_TYPE_TABLE:
-      case wasm::WASM_SYMBOL_TYPE_EVENT:
+      case wasm::WASM_SYMBOL_TYPE_TAG:
         encodeULEB128(Info.ElementIndex, SubSection.getStream());
         if ((Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) == 0 ||
             (Info.Flags & wasm::WASM_SYMBOL_EXPLICIT_NAME) != 0)
@@ -385,10 +385,10 @@ void WasmWriter::writeSectionContent(raw_ostream &OS,
       writeUint8(OS, Import.GlobalImport.Mutable);
       NumImportedGlobals++;
       break;
-    case wasm::WASM_EXTERNAL_EVENT:
-      writeUint32(OS, Import.EventImport.Attribute);
-      writeUint32(OS, Import.EventImport.SigIndex);
-      NumImportedEvents++;
+    case wasm::WASM_EXTERNAL_TAG:
+      writeUint32(OS, Import.TagImport.Attribute);
+      writeUint32(OS, Import.TagImport.SigIndex);
+      NumImportedTags++;
       break;
     case wasm::WASM_EXTERNAL_MEMORY:
       writeLimits(Import.Memory, OS);
@@ -450,17 +450,17 @@ void WasmWriter::writeSectionContent(raw_ostream &OS,
 }
 
 void WasmWriter::writeSectionContent(raw_ostream &OS,
-                                     WasmYAML::EventSection &Section) {
-  encodeULEB128(Section.Events.size(), OS);
-  uint32_t ExpectedIndex = NumImportedEvents;
-  for (auto &Event : Section.Events) {
-    if (Event.Index != ExpectedIndex) {
-      reportError("unexpected event index: " + Twine(Event.Index));
+                                     WasmYAML::TagSection &Section) {
+  encodeULEB128(Section.Tags.size(), OS);
+  uint32_t ExpectedIndex = NumImportedTags;
+  for (auto &Tag : Section.Tags) {
+    if (Tag.Index != ExpectedIndex) {
+      reportError("unexpected tag index: " + Twine(Tag.Index));
       return;
     }
     ++ExpectedIndex;
-    encodeULEB128(Event.Attribute, OS);
-    encodeULEB128(Event.SigIndex, OS);
+    encodeULEB128(Tag.Attribute, OS);
+    encodeULEB128(Tag.SigIndex, OS);
   }
 }
 
@@ -626,7 +626,7 @@ bool WasmWriter::writeWasm(raw_ostream &OS) {
       writeSectionContent(StringStream, *S);
     else if (auto S = dyn_cast<WasmYAML::MemorySection>(Sec.get()))
       writeSectionContent(StringStream, *S);
-    else if (auto S = dyn_cast<WasmYAML::EventSection>(Sec.get()))
+    else if (auto S = dyn_cast<WasmYAML::TagSection>(Sec.get()))
       writeSectionContent(StringStream, *S);
     else if (auto S = dyn_cast<WasmYAML::GlobalSection>(Sec.get()))
       writeSectionContent(StringStream, *S);
diff --git a/llvm/lib/ObjectYAML/WasmYAML.cpp b/llvm/lib/ObjectYAML/WasmYAML.cpp
index 6b7357c..752654d 100644
--- a/llvm/lib/ObjectYAML/WasmYAML.cpp
+++ b/llvm/lib/ObjectYAML/WasmYAML.cpp
@@ -120,9 +120,9 @@ static void sectionMapping(IO &IO, WasmYAML::MemorySection &Section) {
   IO.mapOptional("Memories", Section.Memories);
 }
 
-static void sectionMapping(IO &IO, WasmYAML::EventSection &Section) {
+static void sectionMapping(IO &IO, WasmYAML::TagSection &Section) {
   commonSectionMapping(IO, Section);
-  IO.mapOptional("Events", Section.Events);
+  IO.mapOptional("Tags", Section.Tags);
 }
 
 static void sectionMapping(IO &IO, WasmYAML::GlobalSection &Section) {
@@ -229,10 +229,10 @@ void MappingTraits<std::unique_ptr<WasmYAML::Section>>::mapping(
       Section.reset(new WasmYAML::MemorySection());
     sectionMapping(IO, *cast<WasmYAML::MemorySection>(Section.get()));
     break;
-  case wasm::WASM_SEC_EVENT:
+  case wasm::WASM_SEC_TAG:
     if (!IO.outputting())
-      Section.reset(new WasmYAML::EventSection());
-    sectionMapping(IO, *cast<WasmYAML::EventSection>(Section.get()));
+      Section.reset(new WasmYAML::TagSection());
+    sectionMapping(IO, *cast<WasmYAML::TagSection>(Section.get()));
     break;
   case wasm::WASM_SEC_GLOBAL:
     if (!IO.outputting())
@@ -284,7 +284,7 @@ void ScalarEnumerationTraits<WasmYAML::SectionType>::enumeration(
   ECase(TABLE);
   ECase(MEMORY);
   ECase(GLOBAL);
-  ECase(EVENT);
+  ECase(TAG);
   ECase(EXPORT);
   ECase(START);
   ECase(ELEM);
@@ -396,9 +396,9 @@ void MappingTraits<WasmYAML::Import>::mapping(IO &IO,
   } else if (Import.Kind == wasm::WASM_EXTERNAL_GLOBAL) {
     IO.mapRequired("GlobalType", Import.GlobalImport.Type);
     IO.mapRequired("GlobalMutable", Import.GlobalImport.Mutable);
-  } else if (Import.Kind == wasm::WASM_EXTERNAL_EVENT) {
-    IO.mapRequired("EventAttribute", Import.EventImport.Attribute);
-    IO.mapRequired("EventSigIndex", Import.EventImport.SigIndex);
+  } else if (Import.Kind == wasm::WASM_EXTERNAL_TAG) {
+    IO.mapRequired("TagAttribute", Import.TagImport.Attribute);
+    IO.mapRequired("TagSigIndex", Import.TagImport.SigIndex);
   } else if (Import.Kind == wasm::WASM_EXTERNAL_TABLE) {
     IO.mapRequired("Table", Import.TableImport);
   } else if (Import.Kind == wasm::WASM_EXTERNAL_MEMORY) {
@@ -510,8 +510,8 @@ void MappingTraits<WasmYAML::SymbolInfo>::mapping(IO &IO,
     IO.mapRequired("Global", Info.ElementIndex);
   } else if (Info.Kind == wasm::WASM_SYMBOL_TYPE_TABLE) {
     IO.mapRequired("Table", Info.ElementIndex);
-  } else if (Info.Kind == wasm::WASM_SYMBOL_TYPE_EVENT) {
-    IO.mapRequired("Event", Info.ElementIndex);
+  } else if (Info.Kind == wasm::WASM_SYMBOL_TYPE_TAG) {
+    IO.mapRequired("Tag", Info.ElementIndex);
   } else if (Info.Kind == wasm::WASM_SYMBOL_TYPE_DATA) {
     if ((Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) == 0) {
       IO.mapRequired("Segment", Info.DataRef.Segment);
@@ -525,10 +525,10 @@ void MappingTraits<WasmYAML::SymbolInfo>::mapping(IO &IO,
   }
 }
 
-void MappingTraits<WasmYAML::Event>::mapping(IO &IO, WasmYAML::Event &Event) {
-  IO.mapRequired("Index", Event.Index);
-  IO.mapRequired("Attribute", Event.Attribute);
-  IO.mapRequired("SigIndex", Event.SigIndex);
+void MappingTraits<WasmYAML::Tag>::mapping(IO &IO, WasmYAML::Tag &Tag) {
+  IO.mapRequired("Index", Tag.Index);
+  IO.mapRequired("Attribute", Tag.Attribute);
+  IO.mapRequired("SigIndex", Tag.SigIndex);
 }
 
 void ScalarBitSetTraits<WasmYAML::LimitFlags>::bitset(
@@ -572,7 +572,7 @@ void ScalarEnumerationTraits<WasmYAML::SymbolKind>::enumeration(
   ECase(GLOBAL);
   ECase(TABLE);
   ECase(SECTION);
-  ECase(EVENT);
+  ECase(TAG);
 #undef ECase
 }
 
@@ -597,7 +597,7 @@ void ScalarEnumerationTraits<WasmYAML::ExportKind>::enumeration(
   ECase(TABLE);
   ECase(MEMORY);
   ECase(GLOBAL);
-  ECase(EVENT);
+  ECase(TAG);
 #undef ECase
 }