1 files changed, 174 insertions, 14 deletions

diff --git a/contrib/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp b/contrib/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
index 3cee8b2..00bf024 100644
--- a/contrib/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
+++ b/contrib/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
@@ -18,9 +18,11 @@
 #include "WebAssemblyMCTargetDesc.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCSectionWasm.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCSymbolELF.h"
-#include "llvm/Support/ELF.h"
+#include "llvm/MC/MCSymbolWasm.h"
+#include "llvm/Support/Casting.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FormattedStream.h"
 using namespace llvm;
@@ -28,6 +30,10 @@ using namespace llvm;
 WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S)
     : MCTargetStreamer(S) {}
 
+void WebAssemblyTargetStreamer::emitValueType(wasm::ValType Type) {
+  Streamer.EmitSLEB128IntValue(int32_t(Type));
+}
+
 WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer(
     MCStreamer &S, formatted_raw_ostream &OS)
     : WebAssemblyTargetStreamer(S), OS(OS) {}
@@ -35,6 +41,9 @@ WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer(
 WebAssemblyTargetELFStreamer::WebAssemblyTargetELFStreamer(MCStreamer &S)
     : WebAssemblyTargetStreamer(S) {}
 
+WebAssemblyTargetWasmStreamer::WebAssemblyTargetWasmStreamer(MCStreamer &S)
+    : WebAssemblyTargetStreamer(S) {}
+
 static void PrintTypes(formatted_raw_ostream &OS, ArrayRef<MVT> Types) {
   bool First = true;
   for (MVT Type : Types) {
@@ -47,14 +56,28 @@ static void PrintTypes(formatted_raw_ostream &OS, ArrayRef<MVT> Types) {
   OS << '\n';
 }
 
-void WebAssemblyTargetAsmStreamer::emitParam(ArrayRef<MVT> Types) {
-  OS << "\t.param  \t";
-  PrintTypes(OS, Types);
+void WebAssemblyTargetAsmStreamer::emitParam(MCSymbol *Symbol,
+                                             ArrayRef<MVT> Types) {
+  if (!Types.empty()) {
+    OS << "\t.param  \t";
+
+    // FIXME: Currently this applies to the "current" function; it may
+    // be cleaner to specify an explicit symbol as part of the directive.
+
+    PrintTypes(OS, Types);
+  }
 }
 
-void WebAssemblyTargetAsmStreamer::emitResult(ArrayRef<MVT> Types) {
-  OS << "\t.result \t";
-  PrintTypes(OS, Types);
+void WebAssemblyTargetAsmStreamer::emitResult(MCSymbol *Symbol,
+                                              ArrayRef<MVT> Types) {
+  if (!Types.empty()) {
+    OS << "\t.result \t";
+
+    // FIXME: Currently this applies to the "current" function; it may
+    // be cleaner to specify an explicit symbol as part of the directive.
+
+    PrintTypes(OS, Types);
+  }
 }
 
 void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<MVT> Types) {
@@ -64,11 +87,36 @@ void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<MVT> Types) {
   }
 }
 
+void WebAssemblyTargetAsmStreamer::emitGlobal(
+    ArrayRef<wasm::Global> Globals) {
+  if (!Globals.empty()) {
+    OS << "\t.globalvar  \t";
+
+    bool First = true;
+    for (const wasm::Global &G : Globals) {
+      if (First)
+        First = false;
+      else
+        OS << ", ";
+      OS << WebAssembly::TypeToString(G.Type);
+      if (!G.InitialModule.empty())
+        OS << '=' << G.InitialModule << ':' << G.InitialName;
+      else
+        OS << '=' << G.InitialValue;
+    }
+    OS << '\n';
+  }
+}
+
+void WebAssemblyTargetAsmStreamer::emitStackPointer(uint32_t Index) {
+  OS << "\t.stack_pointer\t" << Index << '\n';
+}
+
 void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; }
 
 void WebAssemblyTargetAsmStreamer::emitIndirectFunctionType(
-    StringRef name, SmallVectorImpl<MVT> &Params, SmallVectorImpl<MVT> &Results) {
-  OS << "\t.functype\t" << name;
+    MCSymbol *Symbol, SmallVectorImpl<MVT> &Params, SmallVectorImpl<MVT> &Results) {
+  OS << "\t.functype\t" << Symbol->getName();
   if (Results.empty())
     OS << ", void";
   else {
@@ -88,18 +136,30 @@ void WebAssemblyTargetAsmStreamer::emitIndIdx(const MCExpr *Value) {
   OS << "\t.indidx  \t" << *Value << '\n';
 }
 
-void WebAssemblyTargetELFStreamer::emitParam(ArrayRef<MVT> Types) {
+void WebAssemblyTargetELFStreamer::emitParam(MCSymbol *Symbol,
+                                             ArrayRef<MVT> Types) {
   // Nothing to emit; params are declared as part of the function signature.
 }
 
-void WebAssemblyTargetELFStreamer::emitResult(ArrayRef<MVT> Types) {
+void WebAssemblyTargetELFStreamer::emitResult(MCSymbol *Symbol,
+                                              ArrayRef<MVT> Types) {
   // Nothing to emit; results are declared as part of the function signature.
 }
 
 void WebAssemblyTargetELFStreamer::emitLocal(ArrayRef<MVT> Types) {
   Streamer.EmitULEB128IntValue(Types.size());
   for (MVT Type : Types)
-    Streamer.EmitIntValue(int64_t(WebAssembly::toValType(Type)), 1);
+    emitValueType(WebAssembly::toValType(Type));
+}
+
+void WebAssemblyTargetELFStreamer::emitGlobal(
+    ArrayRef<wasm::Global> Globals) {
+  llvm_unreachable(".globalvar encoding not yet implemented");
+}
+
+void WebAssemblyTargetELFStreamer::emitStackPointer(
+    uint32_t Index) {
+  llvm_unreachable(".stack_pointer encoding not yet implemented");
 }
 
 void WebAssemblyTargetELFStreamer::emitEndFunc() {
@@ -111,10 +171,110 @@ void WebAssemblyTargetELFStreamer::emitIndIdx(const MCExpr *Value) {
 }
 
 void WebAssemblyTargetELFStreamer::emitIndirectFunctionType(
-    StringRef name, SmallVectorImpl<MVT> &Params, SmallVectorImpl<MVT> &Results) {
+    MCSymbol *Symbol, SmallVectorImpl<MVT> &Params, SmallVectorImpl<MVT> &Results) {
   // Nothing to emit here. TODO: Re-design how linking works and re-evaluate
   // whether it's necessary for .o files to declare indirect function types.
 }
 
 void WebAssemblyTargetELFStreamer::emitGlobalImport(StringRef name) {
-}
\ No newline at end of file
+}
+
+void WebAssemblyTargetWasmStreamer::emitParam(MCSymbol *Symbol,
+                                              ArrayRef<MVT> Types) {
+  SmallVector<wasm::ValType, 4> Params;
+  for (MVT Ty : Types)
+    Params.push_back(WebAssembly::toValType(Ty));
+
+  cast<MCSymbolWasm>(Symbol)->setParams(std::move(Params));
+}
+
+void WebAssemblyTargetWasmStreamer::emitResult(MCSymbol *Symbol,
+                                               ArrayRef<MVT> Types) {
+  SmallVector<wasm::ValType, 4> Returns;
+  for (MVT Ty : Types)
+    Returns.push_back(WebAssembly::toValType(Ty));
+
+  cast<MCSymbolWasm>(Symbol)->setReturns(std::move(Returns));
+}
+
+void WebAssemblyTargetWasmStreamer::emitLocal(ArrayRef<MVT> Types) {
+  SmallVector<std::pair<MVT, uint32_t>, 4> Grouped;
+  for (MVT 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(WebAssembly::toValType(Pair.first));
+  }
+}
+
+void WebAssemblyTargetWasmStreamer::emitGlobal(
+    ArrayRef<wasm::Global> Globals) {
+  // Encode the globals use by the funciton into the special .global_variables
+  // section. This will later be decoded and turned into contents for the
+  // Globals Section.
+  Streamer.PushSection();
+  Streamer.SwitchSection(Streamer.getContext()
+                                 .getWasmSection(".global_variables", 0, 0));
+  for (const wasm::Global &G : Globals) {
+    Streamer.EmitIntValue(int32_t(G.Type), 1);
+    Streamer.EmitIntValue(G.Mutable, 1);
+    if (G.InitialModule.empty()) {
+      Streamer.EmitIntValue(0, 1); // indicate that we have an int value
+      Streamer.EmitSLEB128IntValue(0);
+    } else {
+      Streamer.EmitIntValue(1, 1); // indicate that we have a module import
+      Streamer.EmitBytes(G.InitialModule);
+      Streamer.EmitIntValue(0, 1); // nul-terminate
+      Streamer.EmitBytes(G.InitialName);
+      Streamer.EmitIntValue(0, 1); // nul-terminate
+    }
+  }
+  Streamer.PopSection();
+}
+
+void WebAssemblyTargetWasmStreamer::emitStackPointer(uint32_t Index) {
+  Streamer.PushSection();
+  Streamer.SwitchSection(Streamer.getContext()
+                                 .getWasmSection(".stack_pointer", 0, 0));
+  Streamer.EmitIntValue(Index, 4);
+  Streamer.PopSection();
+}
+
+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");
+}
+
+void WebAssemblyTargetWasmStreamer::emitIndirectFunctionType(
+    MCSymbol *Symbol, SmallVectorImpl<MVT> &Params,
+    SmallVectorImpl<MVT> &Results) {
+  MCSymbolWasm *WasmSym = cast<MCSymbolWasm>(Symbol);
+  if (WasmSym->isFunction()) {
+    // Symbol already has its arguments and result set.
+    return;
+  }
+
+  SmallVector<wasm::ValType, 4> ValParams;
+  for (MVT Ty : Params)
+    ValParams.push_back(WebAssembly::toValType(Ty));
+
+  SmallVector<wasm::ValType, 1> ValResults;
+  for (MVT Ty : Results)
+    ValResults.push_back(WebAssembly::toValType(Ty));
+
+  WasmSym->setParams(std::move(ValParams));
+  WasmSym->setReturns(std::move(ValResults));
+  WasmSym->setIsFunction(true);
+}
+
+void WebAssemblyTargetWasmStreamer::emitGlobalImport(StringRef name) {
+}