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//===-- WebAssemblyFastISel.cpp - WebAssembly FastISel 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 defines the WebAssembly-specific support for the FastISel
/// class. Some of the target-specific code is generated by tablegen in the file
/// WebAssemblyGenFastISel.inc, which is #included here.
///
//===----------------------------------------------------------------------===//
#include "WebAssembly.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyTargetMachine.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/CodeGen/FastISel.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Operator.h"
using namespace llvm;
#define DEBUG_TYPE "wasm-fastisel"
namespace {
class WebAssemblyFastISel final : public FastISel {
/// Keep a pointer to the WebAssemblySubtarget around so that we can make the
/// right decision when generating code for different targets.
const WebAssemblySubtarget *Subtarget;
LLVMContext *Context;
// Call handling routines.
private:
public:
// Backend specific FastISel code.
WebAssemblyFastISel(FunctionLoweringInfo &FuncInfo,
const TargetLibraryInfo *LibInfo)
: FastISel(FuncInfo, LibInfo, /*SkipTargetIndependentISel=*/true) {
Subtarget = &FuncInfo.MF->getSubtarget<WebAssemblySubtarget>();
Context = &FuncInfo.Fn->getContext();
}
bool fastSelectInstruction(const Instruction *I) override;
#include "WebAssemblyGenFastISel.inc"
};
} // end anonymous namespace
bool WebAssemblyFastISel::fastSelectInstruction(const Instruction *I) {
switch (I->getOpcode()) {
default:
break;
// TODO: add fast-isel selection cases here...
}
// Fall back to target-independent instruction selection.
return selectOperator(I, I->getOpcode());
}
FastISel *WebAssembly::createFastISel(FunctionLoweringInfo &FuncInfo,
const TargetLibraryInfo *LibInfo) {
return new WebAssemblyFastISel(FuncInfo, LibInfo);
}
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