[clang] [llvm] [WebAssembly] Represent reference types as TargetExtType (PR #203165)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,c,h -- clang/test/CodeGen/WebAssembly/wasm-funcref-to-ptr-error.c clang/lib/CodeGen/CGCall.cpp clang/lib/CodeGen/CGExprScalar.cpp clang/lib/CodeGen/CodeGenTypes.cpp clang/test/CodeGen/WebAssembly/builtins-table-externref.c clang/test/CodeGen/WebAssembly/builtins-table-funcref.c clang/test/CodeGen/WebAssembly/builtins-test-fp-sig.c clang/test/CodeGen/WebAssembly/wasm-externref.c clang/test/CodeGen/WebAssembly/wasm-funcref.c clang/test/CodeGen/builtins-wasm.c llvm/include/llvm/IR/Intrinsics.h llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp llvm/lib/CodeGen/ValueTypes.cpp llvm/lib/IR/Intrinsics.cpp llvm/lib/IR/Type.cpp llvm/lib/Target/WebAssembly/GISel/WebAssemblyCallLowering.cpp llvm/lib/Target/WebAssembly/Utils/WasmAddressSpaces.h llvm/lib/Target/WebAssembly/Utils/WebAssemblyTypeUtilities.h llvm/lib/Target/WebAssembly/WebAssembly.h llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.h llvm/lib/Target/WebAssembly/WebAssemblyRefTypeMem2Local.cpp llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/CodeGen/ValueTypes.cpp b/llvm/lib/CodeGen/ValueTypes.cpp
index 3cd34ea62..a8eb5f801 100644
--- a/llvm/lib/CodeGen/ValueTypes.cpp
+++ b/llvm/lib/CodeGen/ValueTypes.cpp
@@ -268,9 +268,9 @@ MVT MVT::getVT(Type *Ty, bool HandleUnknown){
     TargetExtType *TargetExtTy = cast<TargetExtType>(Ty);
     if (TargetExtTy->getName() == "aarch64.svcount")
       return MVT(MVT::aarch64svcount);
-    else if(TargetExtTy->getName() == "wasm.externref")
+    else if (TargetExtTy->getName() == "wasm.externref")
       return MVT(MVT::externref);
-    else if(TargetExtTy->getName() == "wasm.funcref")
+    else if (TargetExtTy->getName() == "wasm.funcref")
       return MVT(MVT::funcref);
     else if (TargetExtTy->getName().starts_with("spirv."))
       return MVT(MVT::spirvbuiltin);
diff --git a/llvm/lib/Target/WebAssembly/GISel/WebAssemblyCallLowering.cpp b/llvm/lib/Target/WebAssembly/GISel/WebAssemblyCallLowering.cpp
index 7ba7eac2c..3241e3078 100644
--- a/llvm/lib/Target/WebAssembly/GISel/WebAssemblyCallLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/GISel/WebAssemblyCallLowering.cpp
@@ -58,8 +58,8 @@ static unsigned extendOpFromFlags(ISD::ArgFlagsTy Flags) {
   return TargetOpcode::G_ANYEXT;
 }
 
-// GlobalISel doesn't handle reference types. We bail out of GlobalISel for functions
-// passing/returning references and fall back to SDAG.
+// GlobalISel doesn't handle reference types. We bail out of GlobalISel for
+// functions passing/returning references and fall back to SDAG.
 static bool typeContainsReference(const Type *Ty) {
   if (WebAssembly::isWebAssemblyReferenceType(Ty))
     return true;

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https://github.com/llvm/llvm-project/pull/203165