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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) {
OS << "\t.local \t";
PrintTypes(OS, Types);
}
void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; }
void WebAssemblyTargetAsmStreamer::emitIndirectFunctionType(
StringRef name, SmallVectorImpl<MVT> &SignatureVTs, size_t NumResults) {
OS << "\t.functype\t" << name;
if (NumResults == 0) OS << ", void";
for (auto Ty : SignatureVTs) {
OS << ", " << WebAssembly::TypeToString(Ty);
}
OS << "\n";
}
// FIXME: What follows is not the real binary encoding.
static void EncodeTypes(MCStreamer &Streamer, ArrayRef<MVT> Types) {
Streamer.EmitIntValue(Types.size(), sizeof(uint64_t));
for (MVT Type : Types)
Streamer.EmitIntValue(Type.SimpleTy, sizeof(uint64_t));
}
void WebAssemblyTargetELFStreamer::emitParam(ArrayRef<MVT> Types) {
Streamer.EmitIntValue(WebAssembly::DotParam, sizeof(uint64_t));
EncodeTypes(Streamer, Types);
}
void WebAssemblyTargetELFStreamer::emitResult(ArrayRef<MVT> Types) {
Streamer.EmitIntValue(WebAssembly::DotResult, sizeof(uint64_t));
EncodeTypes(Streamer, Types);
}
void WebAssemblyTargetELFStreamer::emitLocal(ArrayRef<MVT> Types) {
Streamer.EmitIntValue(WebAssembly::DotLocal, sizeof(uint64_t));
EncodeTypes(Streamer, Types);
}
void WebAssemblyTargetELFStreamer::emitEndFunc() {
Streamer.EmitIntValue(WebAssembly::DotEndFunc, sizeof(uint64_t));
}
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