X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTransforms%2FTransformInternals.cpp;h=8cd2511e7c5f1465f5f4059bf9f9ff956d620882;hb=dac58ad983c62b49629e1f2969f4e0a621167d63;hp=f8476231cf9b3e6dfcd5bd370b6d77cbe4298e04;hpb=0c0edf8afc35a42b15a24ebb5fa5f3fc674290ae;p=oota-llvm.git diff --git a/lib/Transforms/TransformInternals.cpp b/lib/Transforms/TransformInternals.cpp index f8476231cf9..8cd2511e7c5 100644 --- a/lib/Transforms/TransformInternals.cpp +++ b/lib/Transforms/TransformInternals.cpp @@ -1,4 +1,11 @@ -//===-- TransformInternals.cpp - Implement shared functions for transforms --=// +//===- TransformInternals.cpp - Implement shared functions for transforms -===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by the LLVM research group and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// // // This file defines shared functions used by the different components of the // Transforms library. @@ -7,19 +14,13 @@ #include "TransformInternals.h" #include "llvm/Type.h" -#include "llvm/Analysis/Expressions.h" #include "llvm/Function.h" -#include "llvm/iOther.h" - -// TargetData Hack: Eventually we will have annotations given to us by the -// backend so that we know stuff about type size and alignments. For now -// though, just use this, because it happens to match the model that GCC uses. -// -const TargetData TD("LevelRaise: Should be GCC though!"); - +#include "llvm/Instructions.h" +using namespace llvm; -static const Type *getStructOffsetStep(const StructType *STy, unsigned &Offset, - std::vector &Indices) { +static const Type *getStructOffsetStep(const StructType *STy, uint64_t &Offset, + std::vector &Indices, + const TargetData &TD) { assert(Offset < TD.getTypeSize(STy) && "Offset not in composite!"); const StructLayout *SL = TD.getStructLayout(STy); @@ -28,12 +29,12 @@ static const Type *getStructOffsetStep(const StructType *STy, unsigned &Offset, for (i = 0; i < SL->MemberOffsets.size()-1; ++i) if (Offset >= SL->MemberOffsets[i] && Offset < SL->MemberOffsets[i+1]) break; - + assert(Offset >= SL->MemberOffsets[i] && (i == SL->MemberOffsets.size()-1 || Offset < SL->MemberOffsets[i+1])); - + // Make sure to save the current index... - Indices.push_back(ConstantUInt::get(Type::UByteTy, i)); + Indices.push_back(ConstantUInt::get(Type::UIntTy, i)); Offset = SL->MemberOffsets[i]; return STy->getContainedType(i); } @@ -50,148 +51,41 @@ static const Type *getStructOffsetStep(const StructType *STy, unsigned &Offset, // case, this routine will not drill down to the leaf type. Set StopEarly to // false if you want a leaf // -const Type *getStructOffsetType(const Type *Ty, unsigned &Offset, - std::vector &Indices, - bool StopEarly) { +const Type *llvm::getStructOffsetType(const Type *Ty, unsigned &Offset, + std::vector &Indices, + const TargetData &TD, bool StopEarly) { if (Offset == 0 && StopEarly && !Indices.empty()) return Ty; // Return the leaf type - unsigned ThisOffset; + uint64_t ThisOffset; const Type *NextType; if (const StructType *STy = dyn_cast(Ty)) { + if (STy->getNumElements()) { + Offset = 0; + return STy; + } + ThisOffset = Offset; - NextType = getStructOffsetStep(STy, ThisOffset, Indices); + NextType = getStructOffsetStep(STy, ThisOffset, Indices, TD); } else if (const ArrayType *ATy = dyn_cast(Ty)) { - assert(Offset < TD.getTypeSize(ATy) && "Offset not in composite!"); + assert(Offset == 0 || Offset < TD.getTypeSize(ATy) && + "Offset not in composite!"); NextType = ATy->getElementType(); - unsigned ChildSize = TD.getTypeSize(NextType); - Indices.push_back(ConstantUInt::get(Type::UIntTy, Offset/ChildSize)); + unsigned ChildSize = (unsigned)TD.getTypeSize(NextType); + if (ConstantSInt::isValueValidForType(Type::IntTy, Offset/ChildSize)) + Indices.push_back(ConstantSInt::get(Type::IntTy, Offset/ChildSize)); + else + Indices.push_back(ConstantSInt::get(Type::LongTy, Offset/ChildSize)); ThisOffset = (Offset/ChildSize)*ChildSize; } else { - Offset = 0; // Return the offset that we were able to acheive + Offset = 0; // Return the offset that we were able to achieve return Ty; // Return the leaf type } - unsigned SubOffs = Offset - ThisOffset; + unsigned SubOffs = unsigned(Offset - ThisOffset); const Type *LeafTy = getStructOffsetType(NextType, SubOffs, - Indices, StopEarly); - Offset = ThisOffset + SubOffs; + Indices, TD, StopEarly); + Offset = unsigned(ThisOffset + SubOffs); return LeafTy; } - -// ConvertableToGEP - This function returns true if the specified value V is -// a valid index into a pointer of type Ty. If it is valid, Idx is filled in -// with the values that would be appropriate to make this a getelementptr -// instruction. The type returned is the root type that the GEP would point to -// -const Type *ConvertableToGEP(const Type *Ty, Value *OffsetVal, - std::vector &Indices, - BasicBlock::iterator *BI) { - const CompositeType *CompTy = dyn_cast(Ty); - if (CompTy == 0) return 0; - - // See if the cast is of an integer expression that is either a constant, - // or a value scaled by some amount with a possible offset. - // - analysis::ExprType Expr = analysis::ClassifyExpression(OffsetVal); - - // Get the offset and scale values if they exists... - // A scale of zero with Expr.Var != 0 means a scale of 1. - // - int Offset = Expr.Offset ? getConstantValue(Expr.Offset) : 0; - int Scale = Expr.Scale ? getConstantValue(Expr.Scale) : 0; - - if (Expr.Var && Scale == 0) Scale = 1; // Scale != 0 if Expr.Var != 0 - - // Loop over the Scale and Offset values, filling in the Indices vector for - // our final getelementptr instruction. - // - const Type *NextTy = CompTy; - do { - if (!isa(NextTy)) - return 0; // Type must not be ready for processing... - CompTy = cast(NextTy); - - if (const StructType *StructTy = dyn_cast(CompTy)) { - // Step into the appropriate element of the structure... - unsigned ActualOffset = (Offset < 0) ? 0 : (unsigned)Offset; - NextTy = getStructOffsetStep(StructTy, ActualOffset, Indices); - Offset -= ActualOffset; - } else { - const Type *ElTy = cast(CompTy)->getElementType(); - if (!ElTy->isSized()) - return 0; // Type is unreasonable... escape! - unsigned ElSize = TD.getTypeSize(ElTy); - int ElSizeS = (int)ElSize; - - // See if the user is indexing into a different cell of this array... - if (Scale && (Scale >= ElSizeS || -Scale >= ElSizeS)) { - // A scale n*ElSize might occur if we are not stepping through - // array by one. In this case, we will have to insert math to munge - // the index. - // - int ScaleAmt = Scale/ElSizeS; - if (Scale-ScaleAmt*ElSizeS) - return 0; // Didn't scale by a multiple of element size, bail out - Scale = 0; // Scale is consumed - - int Index = Offset/ElSize; // is zero unless Offset > ElSize - Offset -= Index*ElSize; // Consume part of the offset - - if (BI) { // Generate code? - BasicBlock *BB = (*BI)->getParent(); - if (Expr.Var->getType() != Type::UIntTy) { - CastInst *IdxCast = new CastInst(Expr.Var, Type::UIntTy); - if (Expr.Var->hasName()) - IdxCast->setName(Expr.Var->getName()+"-idxcast"); - *BI = ++BB->getInstList().insert(*BI, IdxCast); - Expr.Var = IdxCast; - } - - if (ScaleAmt && ScaleAmt != 1) { - // If we have to scale up our index, do so now - Value *ScaleAmtVal = ConstantUInt::get(Type::UIntTy, - (unsigned)ScaleAmt); - Instruction *Scaler = BinaryOperator::create(Instruction::Mul, - Expr.Var, ScaleAmtVal); - if (Expr.Var->hasName()) - Scaler->setName(Expr.Var->getName()+"-scale"); - - *BI = ++BB->getInstList().insert(*BI, Scaler); - Expr.Var = Scaler; - } - - if (Index) { // Add an offset to the index - Value *IndexAmt = ConstantUInt::get(Type::UIntTy, (unsigned)Index); - Instruction *Offseter = BinaryOperator::create(Instruction::Add, - Expr.Var, IndexAmt); - if (Expr.Var->hasName()) - Offseter->setName(Expr.Var->getName()+"-offset"); - *BI = ++BB->getInstList().insert(*BI, Offseter); - Expr.Var = Offseter; - } - } - - Indices.push_back(Expr.Var); - Expr.Var = 0; - } else if (Offset >= (int)ElSize || -Offset >= (int)ElSize) { - // Calculate the index that we are entering into the array cell with - unsigned Index = Offset/ElSize; - Indices.push_back(ConstantUInt::get(Type::UIntTy, Index)); - Offset -= (int)(Index*ElSize); // Consume part of the offset - - } else if (isa(CompTy) || Indices.empty()) { - // Must be indexing a small amount into the first cell of the array - // Just index into element zero of the array here. - // - Indices.push_back(ConstantUInt::get(Type::UIntTy, 0)); - } else { - return 0; // Hrm. wierd, can't handle this case. Bail - } - NextTy = ElTy; - } - } while (Offset || Scale); // Go until we're done! - - return NextTy; -}