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https://github.com/c64scene-ar/llvm-6502.git
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436906ab3c
the stack of the analysis group because they are all immutable passes. This is made clear by Craig's recent work to use override systematically -- we weren't overriding anything for 'finalizePass' because there is no such thing. This is kind of a lame restriction on the API -- we can no longer push and pop things, we just set up the stack and run. However, I'm not invested in building some better solution on top of the existing (terrifying) immutable pass and legacy pass manager. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203437 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
3.2 KiB
C++
113 lines
3.2 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() override {
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pushTTIStack(this);
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const 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) 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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