llvm-6502/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
2015-07-07 22:38:06 +00:00

66 lines
2.5 KiB
C++

//=- WebAssemblyISelLowering.cpp - WebAssembly DAG Lowering Implementation -==//
//
// 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 implements the WebAssemblyTargetLowering class.
///
//===----------------------------------------------------------------------===//
#include "WebAssemblyISelLowering.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyTargetMachine.h"
#include "WebAssemblyTargetObjectFile.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;
#define DEBUG_TYPE "wasm-lower"
WebAssemblyTargetLowering::WebAssemblyTargetLowering(
const TargetMachine &TM, const WebAssemblySubtarget &STI)
: TargetLowering(TM), Subtarget(&STI) {
// WebAssembly does not produce floating-point exceptions on normal floating
// point operations.
setHasFloatingPointExceptions(false);
// We don't know the microarchitecture here, so just reduce register pressure.
setSchedulingPreference(Sched::RegPressure);
}
//===----------------------------------------------------------------------===//
// WebAssembly Lowering private implementation.
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Lowering Code
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Other Lowering Code
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// WebAssembly Optimization Hooks
//===----------------------------------------------------------------------===//
MCSection *WebAssemblyTargetObjectFile::SelectSectionForGlobal(
const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const {
return getDataSection();
}