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//==-- WebAssemblyTargetStreamer.cpp - WebAssembly Target Streamer Methods --=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file defines WebAssembly-specific target streamer classes.
/// These are for implementing support for target-specific assembly directives.
///
//===----------------------------------------------------------------------===//
#include "WebAssemblyTargetStreamer.h"
#include "InstPrinter/WebAssemblyInstPrinter.h"
#include "WebAssemblyMCTargetDesc.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
using namespace llvm;
WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S)
: MCTargetStreamer(S) {}
WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer(
MCStreamer &S, formatted_raw_ostream &OS)
: WebAssemblyTargetStreamer(S), OS(OS) {}
WebAssemblyTargetELFStreamer::WebAssemblyTargetELFStreamer(MCStreamer &S)
: WebAssemblyTargetStreamer(S) {}
static void PrintTypes(formatted_raw_ostream &OS, ArrayRef<MVT> Types) {
bool First = true;
for (MVT Type : Types) {
if (First)
First = false;
else
OS << ", ";
OS << WebAssembly::TypeToString(Type);
}
OS << '\n';
}
void WebAssemblyTargetAsmStreamer::emitParam(ArrayRef<MVT> Types) {
OS << "\t.param \t";
PrintTypes(OS, Types);
}
void WebAssemblyTargetAsmStreamer::emitResult(ArrayRef<MVT> Types) {
OS << "\t.result \t";
PrintTypes(OS, Types);
}
void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<MVT> Types) {
if (!Types.empty()) {
OS << "\t.local \t";
PrintTypes(OS, Types);
}
}
void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; }
void WebAssemblyTargetAsmStreamer::emitIndirectFunctionType(
StringRef name, SmallVectorImpl<MVT> &Params, SmallVectorImpl<MVT> &Results) {
OS << "\t.functype\t" << name;
if (Results.empty())
OS << ", void";
else {
assert(Results.size() == 1);
OS << ", " << WebAssembly::TypeToString(Results.front());
}
for (auto Ty : Params)
OS << ", " << WebAssembly::TypeToString(Ty);
OS << '\n';
}
void WebAssemblyTargetAsmStreamer::emitGlobalImport(StringRef name) {
OS << "\t.import_global\t" << name << '\n';
}
void WebAssemblyTargetAsmStreamer::emitIndIdx(const MCExpr *Value) {
OS << "\t.indidx \t" << *Value << '\n';
}
void WebAssemblyTargetELFStreamer::emitParam(ArrayRef<MVT> Types) {
// Nothing to emit; params are declared as part of the function signature.
}
void WebAssemblyTargetELFStreamer::emitResult(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);
}
void WebAssemblyTargetELFStreamer::emitEndFunc() {
Streamer.EmitIntValue(WebAssembly::End, 1);
}
void WebAssemblyTargetELFStreamer::emitIndIdx(const MCExpr *Value) {
llvm_unreachable(".indidx encoding not yet implemented");
}
void WebAssemblyTargetELFStreamer::emitIndirectFunctionType(
StringRef name, 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) {
}
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