1 //===-- XCoreTargetTransformInfo.cpp - XCore specific TTI pass ----------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 /// \file 10 /// This file implements a TargetTransformInfo analysis pass specific to the 11 /// XCore target machine. It uses the target's detailed information to provide 12 /// more precise answers to certain TTI queries, while letting the target 13 /// independent and default TTI implementations handle the rest. 14 /// 15 //===----------------------------------------------------------------------===// 16 17 #include "XCore.h" 18 #include "llvm/Analysis/TargetTransformInfo.h" 19 #include "llvm/Support/Debug.h" 20 #include "llvm/Target/CostTable.h" 21 #include "llvm/Target/TargetLowering.h" 22 using namespace llvm; 23 24 #define DEBUG_TYPE "xcoretti" 25 26 // Declare the pass initialization routine locally as target-specific passes 27 // don't have a target-wide initialization entry point, and so we rely on the 28 // pass constructor initialization. 29 namespace llvm { 30 void initializeXCoreTTIPass(PassRegistry &); 31 } 32 33 namespace { 34 35 class XCoreTTI final : public ImmutablePass, public TargetTransformInfo { 36 public: XCoreTTI()37 XCoreTTI() : ImmutablePass(ID) { 38 llvm_unreachable("This pass cannot be directly constructed"); 39 } 40 XCoreTTI(const XCoreTargetMachine * TM)41 XCoreTTI(const XCoreTargetMachine *TM) 42 : ImmutablePass(ID) { 43 initializeXCoreTTIPass(*PassRegistry::getPassRegistry()); 44 } 45 initializePass()46 virtual void initializePass() override { 47 pushTTIStack(this); 48 } 49 getAnalysisUsage(AnalysisUsage & AU) const50 virtual void getAnalysisUsage(AnalysisUsage &AU) const override { 51 TargetTransformInfo::getAnalysisUsage(AU); 52 } 53 54 static char ID; 55 getAdjustedAnalysisPointer(const void * ID)56 virtual void *getAdjustedAnalysisPointer(const void *ID) override { 57 if (ID == &TargetTransformInfo::ID) 58 return (TargetTransformInfo*)this; 59 return this; 60 } 61 getNumberOfRegisters(bool Vector) const62 unsigned getNumberOfRegisters(bool Vector) const override { 63 if (Vector) { 64 return 0; 65 } 66 return 12; 67 } 68 }; 69 70 } // end anonymous namespace 71 72 INITIALIZE_AG_PASS(XCoreTTI, TargetTransformInfo, "xcoretti", 73 "XCore Target Transform Info", true, true, false) 74 char XCoreTTI::ID = 0; 75 76 77 ImmutablePass * createXCoreTargetTransformInfoPass(const XCoreTargetMachine * TM)78llvm::createXCoreTargetTransformInfoPass(const XCoreTargetMachine *TM) { 79 return new XCoreTTI(TM); 80 } 81