1 //===- VPlanAnalysis.h - Various Analyses working on VPlan ------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_TRANSFORMS_VECTORIZE_VPLANANALYSIS_H 10 #define LLVM_TRANSFORMS_VECTORIZE_VPLANANALYSIS_H 11 12 #include "llvm/ADT/DenseMap.h" 13 #include "llvm/ADT/DenseSet.h" 14 15 namespace llvm { 16 17 class LLVMContext; 18 class VPValue; 19 class VPBlendRecipe; 20 class VPInstruction; 21 class VPWidenRecipe; 22 class VPWidenCallRecipe; 23 class VPWidenIntOrFpInductionRecipe; 24 class VPWidenMemoryRecipe; 25 struct VPWidenSelectRecipe; 26 class VPReplicateRecipe; 27 class VPRecipeBase; 28 class VPlan; 29 class Type; 30 31 /// An analysis for type-inference for VPValues. 32 /// It infers the scalar type for a given VPValue by bottom-up traversing 33 /// through defining recipes until root nodes with known types are reached (e.g. 34 /// live-ins or load recipes). The types are then propagated top down through 35 /// operations. 36 /// Note that the analysis caches the inferred types. A new analysis object must 37 /// be constructed once a VPlan has been modified in a way that invalidates any 38 /// of the previously inferred types. 39 class VPTypeAnalysis { 40 DenseMap<const VPValue *, Type *> CachedTypes; 41 /// Type of the canonical induction variable. Used for all VPValues without 42 /// any underlying IR value (like the vector trip count or the backedge-taken 43 /// count). 44 Type *CanonicalIVTy; 45 LLVMContext &Ctx; 46 47 Type *inferScalarTypeForRecipe(const VPBlendRecipe *R); 48 Type *inferScalarTypeForRecipe(const VPInstruction *R); 49 Type *inferScalarTypeForRecipe(const VPWidenCallRecipe *R); 50 Type *inferScalarTypeForRecipe(const VPWidenRecipe *R); 51 Type *inferScalarTypeForRecipe(const VPWidenIntOrFpInductionRecipe *R); 52 Type *inferScalarTypeForRecipe(const VPWidenMemoryRecipe *R); 53 Type *inferScalarTypeForRecipe(const VPWidenSelectRecipe *R); 54 Type *inferScalarTypeForRecipe(const VPReplicateRecipe *R); 55 56 public: VPTypeAnalysis(Type * CanonicalIVTy,LLVMContext & Ctx)57 VPTypeAnalysis(Type *CanonicalIVTy, LLVMContext &Ctx) 58 : CanonicalIVTy(CanonicalIVTy), Ctx(Ctx) {} 59 60 /// Infer the type of \p V. Returns the scalar type of \p V. 61 Type *inferScalarType(const VPValue *V); 62 63 /// Return the LLVMContext used by the analysis. getContext()64 LLVMContext &getContext() { return Ctx; } 65 }; 66 67 // Collect a VPlan's ephemeral recipes (those used only by an assume). 68 void collectEphemeralRecipesForVPlan(VPlan &Plan, 69 DenseSet<VPRecipeBase *> &EphRecipes); 70 } // end namespace llvm 71 72 #endif // LLVM_TRANSFORMS_VECTORIZE_VPLANANALYSIS_H 73