1 files changed, 123 insertions, 0 deletions
diff --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
new file mode 100644
index 000000000000..40926201931a
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
@@ -0,0 +1,123 @@
+//==-- WebAssemblyTargetStreamer.cpp - WebAssembly Target Streamer Methods --=//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file defines WebAssembly-specific target streamer classes.
+/// These are for implementing support for target-specific assembly directives.
+///
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/WebAssemblyTargetStreamer.h"
+#include "MCTargetDesc/WebAssemblyInstPrinter.h"
+#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSectionWasm.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbolWasm.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+using namespace llvm;
+
+WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S)
+    : MCTargetStreamer(S) {}
+
+void WebAssemblyTargetStreamer::emitValueType(wasm::ValType Type) {
+  Streamer.EmitIntValue(uint8_t(Type), 1);
+}
+
+WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer(
+    MCStreamer &S, formatted_raw_ostream &OS)
+    : WebAssemblyTargetStreamer(S), OS(OS) {}
+
+WebAssemblyTargetWasmStreamer::WebAssemblyTargetWasmStreamer(MCStreamer &S)
+    : WebAssemblyTargetStreamer(S) {}
+
+static void printTypes(formatted_raw_ostream &OS,
+                       ArrayRef<wasm::ValType> Types) {
+  bool First = true;
+  for (auto Type : Types) {
+    if (First)
+      First = false;
+    else
+      OS << ", ";
+    OS << WebAssembly::typeToString(Type);
+  }
+  OS << '\n';
+}
+
+void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<wasm::ValType> Types) {
+  if (!Types.empty()) {
+    OS << "\t.local  \t";
+    printTypes(OS, Types);
+  }
+}
+
+void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; }
+
+void WebAssemblyTargetAsmStreamer::emitFunctionType(const MCSymbolWasm *Sym) {
+  assert(Sym->isFunction());
+  OS << "\t.functype\t" << Sym->getName() << " ";
+  OS << WebAssembly::signatureToString(Sym->getSignature());
+  OS << "\n";
+}
+
+void WebAssemblyTargetAsmStreamer::emitGlobalType(const MCSymbolWasm *Sym) {
+  assert(Sym->isGlobal());
+  OS << "\t.globaltype\t" << Sym->getName() << ", "
+     << WebAssembly::typeToString(
+            static_cast<wasm::ValType>(Sym->getGlobalType().Type))
+     << '\n';
+}
+
+void WebAssemblyTargetAsmStreamer::emitEventType(const MCSymbolWasm *Sym) {
+  assert(Sym->isEvent());
+  OS << "\t.eventtype\t" << Sym->getName() << " ";
+  OS << WebAssembly::typeListToString(Sym->getSignature()->Params);
+  OS << "\n";
+}
+
+void WebAssemblyTargetAsmStreamer::emitImportModule(const MCSymbolWasm *Sym,
+                                                    StringRef ImportModule) {
+  OS << "\t.import_module\t" << Sym->getName() << ", "
+                             << ImportModule << '\n';
+}
+
+void WebAssemblyTargetAsmStreamer::emitImportName(const MCSymbolWasm *Sym,
+                                                  StringRef ImportName) {
+  OS << "\t.import_name\t" << Sym->getName() << ", "
+                           << ImportName << '\n';
+}
+
+void WebAssemblyTargetAsmStreamer::emitIndIdx(const MCExpr *Value) {
+  OS << "\t.indidx  \t" << *Value << '\n';
+}
+
+void WebAssemblyTargetWasmStreamer::emitLocal(ArrayRef<wasm::ValType> Types) {
+  SmallVector<std::pair<wasm::ValType, uint32_t>, 4> Grouped;
+  for (auto Type : Types) {
+    if (Grouped.empty() || Grouped.back().first != Type)
+      Grouped.push_back(std::make_pair(Type, 1));
+    else
+      ++Grouped.back().second;
+  }
+
+  Streamer.EmitULEB128IntValue(Grouped.size());
+  for (auto Pair : Grouped) {
+    Streamer.EmitULEB128IntValue(Pair.second);
+    emitValueType(Pair.first);
+  }
+}
+
+void WebAssemblyTargetWasmStreamer::emitEndFunc() {
+  llvm_unreachable(".end_func is not needed for direct wasm output");
+}
+
+void WebAssemblyTargetWasmStreamer::emitIndIdx(const MCExpr *Value) {
+  llvm_unreachable(".indidx encoding not yet implemented");
+}