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//===- AArch64TargetTransformInfo.cpp - AArch64 specific TTI pass ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements a TargetTransformInfo analysis pass specific to the
/// AArch64 target machine. It uses the target's detailed information to provide
/// more precise answers to certain TTI queries, while letting the target
/// independent and default TTI implementations handle the rest.
///
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "aarch64tti"
#include "AArch64.h"
#include "AArch64TargetMachine.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Target/CostTable.h"
#include "llvm/Target/TargetLowering.h"
using namespace llvm;
// Declare the pass initialization routine locally as target-specific passes
// don't have a target-wide initialization entry point, and so we rely on the
// pass constructor initialization.
namespace llvm {
void initializeAArch64TTIPass(PassRegistry &);
}
namespace {
class AArch64TTI final : public ImmutablePass, public TargetTransformInfo {
const AArch64TargetMachine *TM;
const AArch64Subtarget *ST;
const AArch64TargetLowering *TLI;
/// Estimate the overhead of scalarizing an instruction. Insert and Extract
/// are set if the result needs to be inserted and/or extracted from vectors.
unsigned getScalarizationOverhead(Type *Ty, bool Insert, bool Extract) const;
public:
AArch64TTI() : ImmutablePass(ID), TM(0), ST(0), TLI(0) {
llvm_unreachable("This pass cannot be directly constructed");
}
AArch64TTI(const AArch64TargetMachine *TM)
: ImmutablePass(ID), TM(TM), ST(TM->getSubtargetImpl()),
TLI(TM->getTargetLowering()) {
initializeAArch64TTIPass(*PassRegistry::getPassRegistry());
}
virtual void initializePass() override {
pushTTIStack(this);
}
virtual void finalizePass() {
popTTIStack();
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const override {
TargetTransformInfo::getAnalysisUsage(AU);
}
/// Pass identification.
static char ID;
/// Provide necessary pointer adjustments for the two base classes.
virtual void *getAdjustedAnalysisPointer(const void *ID) override {
if (ID == &TargetTransformInfo::ID)
return (TargetTransformInfo*)this;
return this;
}
/// \name Scalar TTI Implementations
/// @{
/// @}
/// \name Vector TTI Implementations
/// @{
unsigned getNumberOfRegisters(bool Vector) const {
if (Vector) {
if (ST->hasNEON())
return 32;
return 0;
}
return 32;
}
unsigned getRegisterBitWidth(bool Vector) const {
if (Vector) {
if (ST->hasNEON())
return 128;
return 0;
}
return 64;
}
/// @}
};
} // end anonymous namespace
INITIALIZE_AG_PASS(AArch64TTI, TargetTransformInfo, "aarch64tti",
"AArch64 Target Transform Info", true, true, false)
char AArch64TTI::ID = 0;
ImmutablePass *
llvm::createAArch64TargetTransformInfoPass(const AArch64TargetMachine *TM) {
return new AArch64TTI(TM);
}
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