mirror of
https://github.com/c64scene-ar/llvm-6502.git
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4eb03f049e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202618 91177308-0d34-0410-b5e6-96231b3b80d8
117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
//===- AArch64TargetTransformInfo.cpp - AArch64 specific TTI pass ---------===//
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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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/// \file
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/// This file implements a TargetTransformInfo analysis pass specific to the
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/// AArch64 target machine. It uses the target's detailed information to provide
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/// more precise answers to certain TTI queries, while letting the target
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/// independent and default TTI implementations handle the rest.
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///
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "aarch64tti"
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#include "AArch64.h"
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#include "AArch64TargetMachine.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Target/CostTable.h"
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#include "llvm/Target/TargetLowering.h"
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using namespace llvm;
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// Declare the pass initialization routine locally as target-specific passes
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// don't have a target-wide initialization entry point, and so we rely on the
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// pass constructor initialization.
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namespace llvm {
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void initializeAArch64TTIPass(PassRegistry &);
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}
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namespace {
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class AArch64TTI final : public ImmutablePass, public TargetTransformInfo {
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const AArch64TargetMachine *TM;
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const AArch64Subtarget *ST;
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const AArch64TargetLowering *TLI;
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/// Estimate the overhead of scalarizing an instruction. Insert and Extract
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/// are set if the result needs to be inserted and/or extracted from vectors.
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unsigned getScalarizationOverhead(Type *Ty, bool Insert, bool Extract) const;
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public:
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AArch64TTI() : ImmutablePass(ID), TM(0), ST(0), TLI(0) {
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llvm_unreachable("This pass cannot be directly constructed");
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}
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AArch64TTI(const AArch64TargetMachine *TM)
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: ImmutablePass(ID), TM(TM), ST(TM->getSubtargetImpl()),
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TLI(TM->getTargetLowering()) {
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initializeAArch64TTIPass(*PassRegistry::getPassRegistry());
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}
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virtual void initializePass() LLVM_OVERRIDE {
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pushTTIStack(this);
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}
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virtual void finalizePass() {
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popTTIStack();
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const LLVM_OVERRIDE {
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TargetTransformInfo::getAnalysisUsage(AU);
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}
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/// Pass identification.
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static char ID;
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/// Provide necessary pointer adjustments for the two base classes.
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virtual void *getAdjustedAnalysisPointer(const void *ID) LLVM_OVERRIDE {
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if (ID == &TargetTransformInfo::ID)
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return (TargetTransformInfo*)this;
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return this;
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}
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/// \name Scalar TTI Implementations
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/// @{
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/// @}
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/// \name Vector TTI Implementations
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/// @{
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unsigned getNumberOfRegisters(bool Vector) const {
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if (Vector) {
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if (ST->hasNEON())
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return 32;
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return 0;
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}
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return 32;
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}
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unsigned getRegisterBitWidth(bool Vector) const {
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if (Vector) {
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if (ST->hasNEON())
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return 128;
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return 0;
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}
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return 64;
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}
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/// @}
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};
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} // end anonymous namespace
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INITIALIZE_AG_PASS(AArch64TTI, TargetTransformInfo, "aarch64tti",
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"AArch64 Target Transform Info", true, true, false)
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char AArch64TTI::ID = 0;
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ImmutablePass *
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llvm::createAArch64TargetTransformInfoPass(const AArch64TargetMachine *TM) {
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return new AArch64TTI(TM);
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}
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