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