mirror of
https://github.com/c64scene-ar/llvm-6502.git
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Refactor code to share stuff
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1127 91177308-0d34-0410-b5e6-96231b3b80d8
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bacec7bc24
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@ -16,61 +16,17 @@
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/CleanupGCCOutput.h"
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#include "TransformInternals.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/iOther.h"
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#include "llvm/iMemory.h"
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#include "llvm/iTerminators.h"
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#include <map>
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#include <algorithm>
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static const Type *PtrArrSByte = 0; // '[sbyte]*' type
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static const Type *PtrSByte = 0; // 'sbyte*' type
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// ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
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// with a value, then remove and delete the original instruction.
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//
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static void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
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BasicBlock::iterator &BI, Value *V) {
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Instruction *I = *BI;
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// Replaces all of the uses of the instruction with uses of the value
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I->replaceAllUsesWith(V);
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// Remove the unneccesary instruction now...
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BIL.remove(BI);
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// Make sure to propogate a name if there is one already...
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if (I->hasName() && !V->hasName())
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V->setName(I->getName(), BIL.getParent()->getSymbolTable());
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// Remove the dead instruction now...
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delete I;
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}
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// ReplaceInstWithInst - Replace the instruction specified by BI with the
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// instruction specified by I. The original instruction is deleted and BI is
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// updated to point to the new instruction.
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//
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static void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
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BasicBlock::iterator &BI, Instruction *I) {
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assert(I->getParent() == 0 &&
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"ReplaceInstWithInst: Instruction already inserted into basic block!");
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// Insert the new instruction into the basic block...
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BI = BIL.insert(BI, I)+1;
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// Replace all uses of the old instruction, and delete it.
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ReplaceInstWithValue(BIL, BI, I);
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// Reexamine the instruction just inserted next time around the cleanup pass
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// loop.
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--BI;
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}
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// ConvertCallTo - Convert a call to a varargs function with no arg types
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// specified to a concrete nonvarargs method.
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//
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@ -30,20 +30,19 @@
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/LevelChange.h"
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#include "TransformInternals.h"
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#include "llvm/Method.h"
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#include "llvm/Support/STLExtras.h"
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#include "llvm/iOther.h"
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#include "llvm/iMemory.h"
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#include "llvm/ConstPoolVals.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Optimizations/ConstantHandling.h"
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#include "llvm/Optimizations/DCE.h"
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#include <map>
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#include <algorithm>
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#include "llvm/Assembly/Writer.h"
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//#define DEBUG_PEEPHOLE_INSTS 1
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#define DEBUG_PEEPHOLE_INSTS 1
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#ifdef DEBUG_PEEPHOLE_INSTS
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#define PRINT_PEEPHOLE(ID, NUM, I) \
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@ -60,43 +59,6 @@
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PRINT_PEEPHOLE(ID, 2, I3); } while (0)
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// TargetData Hack: Eventually we will have annotations given to us by the
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// backend so that we know stuff about type size and alignments. For now
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// though, just use this, because it happens to match the model that GCC uses.
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//
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const TargetData TD("LevelRaise: Should be GCC though!");
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// losslessCastableTypes - Return true if the types are bitwise equivalent.
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// This predicate returns true if it is possible to cast from one type to
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// another without gaining or losing precision, or altering the bits in any way.
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//
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static bool losslessCastableTypes(const Type *T1, const Type *T2) {
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if (!T1->isPrimitiveType() && !isa<PointerType>(T1)) return false;
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if (!T2->isPrimitiveType() && !isa<PointerType>(T2)) return false;
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if (T1->getPrimitiveID() == T2->getPrimitiveID())
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return true; // Handles identity cast, and cast of differing pointer types
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// Now we know that they are two differing primitive or pointer types
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switch (T1->getPrimitiveID()) {
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case Type::UByteTyID: return T2 == Type::SByteTy;
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case Type::SByteTyID: return T2 == Type::UByteTy;
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case Type::UShortTyID: return T2 == Type::ShortTy;
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case Type::ShortTyID: return T2 == Type::UShortTy;
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case Type::UIntTyID: return T2 == Type::IntTy;
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case Type::IntTyID: return T2 == Type::UIntTy;
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case Type::ULongTyID:
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case Type::LongTyID:
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case Type::PointerTyID:
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return T2 == Type::ULongTy || T2 == Type::LongTy ||
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T2->getPrimitiveID() == Type::PointerTyID;
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default:
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return false; // Other types have no identity values
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}
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}
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// isReinterpretingCast - Return true if the cast instruction specified will
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// cause the operand to be "reinterpreted". A value is reinterpreted if the
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// cast instruction would cause the underlying bits to change.
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@ -153,524 +115,6 @@ static const Type *getStructOffsetType(const Type *Ty, unsigned &Offset,
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// ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
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// with a value, then remove and delete the original instruction.
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//
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static void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
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BasicBlock::iterator &BI, Value *V) {
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Instruction *I = *BI;
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// Replaces all of the uses of the instruction with uses of the value
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I->replaceAllUsesWith(V);
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// Remove the unneccesary instruction now...
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BIL.remove(BI);
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// Make sure to propogate a name if there is one already...
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if (I->hasName() && !V->hasName())
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V->setName(I->getName(), BIL.getParent()->getSymbolTable());
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// Remove the dead instruction now...
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delete I;
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}
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// ReplaceInstWithInst - Replace the instruction specified by BI with the
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// instruction specified by I. The original instruction is deleted and BI is
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// updated to point to the new instruction.
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//
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static void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
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BasicBlock::iterator &BI, Instruction *I) {
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assert(I->getParent() == 0 &&
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"ReplaceInstWithInst: Instruction already inserted into basic block!");
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// Insert the new instruction into the basic block...
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BI = BIL.insert(BI, I)+1;
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// Replace all uses of the old instruction, and delete it.
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ReplaceInstWithValue(BIL, BI, I);
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// Reexamine the instruction just inserted next time around the cleanup pass
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// loop.
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--BI;
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}
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typedef map<const Value*, const Type*> ValueTypeCache;
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typedef map<const Value*, Value*> ValueMapCache;
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// ExpressionConvertableToType - Return true if it is possible
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static bool ExpressionConvertableToType(Value *V, const Type *Ty) {
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Instruction *I = dyn_cast<Instruction>(V);
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if (I == 0) {
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// It's not an instruction, check to see if it's a constant... all constants
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// can be converted to an equivalent value (except pointers, they can't be
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// const prop'd in general).
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//
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if (isa<ConstPoolVal>(V) &&
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!isa<PointerType>(V->getType()) && !isa<PointerType>(Ty)) return true;
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return false; // Otherwise, we can't convert!
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}
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if (I->getType() == Ty) return false; // Expression already correct type!
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switch (I->getOpcode()) {
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case Instruction::Cast:
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// We can convert the expr if the cast destination type is losslessly
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// convertable to the requested type.
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return losslessCastableTypes(Ty, I->getType());
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case Instruction::Add:
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case Instruction::Sub:
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return ExpressionConvertableToType(I->getOperand(0), Ty) &&
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ExpressionConvertableToType(I->getOperand(1), Ty);
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case Instruction::Shr:
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if (Ty->isSigned() != V->getType()->isSigned()) return false;
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// FALL THROUGH
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case Instruction::Shl:
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return ExpressionConvertableToType(I->getOperand(0), Ty);
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case Instruction::Load: {
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LoadInst *LI = cast<LoadInst>(I);
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if (LI->hasIndices()) return false;
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return ExpressionConvertableToType(LI->getPtrOperand(),
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PointerType::get(Ty));
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}
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case Instruction::GetElementPtr: {
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// GetElementPtr's are directly convertable to a pointer type if they have
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// a number of zeros at the end. Because removing these values does not
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// change the logical offset of the GEP, it is okay and fair to remove them.
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// This can change this:
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// %t1 = getelementptr %Hosp * %hosp, ubyte 4, ubyte 0 ; <%List **>
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// %t2 = cast %List * * %t1 to %List *
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// into
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// %t2 = getelementptr %Hosp * %hosp, ubyte 4 ; <%List *>
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//
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GetElementPtrInst *GEP = cast<GetElementPtrInst>(I);
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const PointerType *PTy = dyn_cast<PointerType>(Ty);
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if (!PTy) return false;
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// Check to see if there are zero elements that we can remove from the
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// index array. If there are, check to see if removing them causes us to
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// get to the right type...
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//
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vector<ConstPoolVal*> Indices = GEP->getIndices();
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const Type *BaseType = GEP->getPtrOperand()->getType();
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while (Indices.size() &&
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cast<ConstPoolUInt>(Indices.back())->getValue() == 0) {
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Indices.pop_back();
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const Type *ElTy = GetElementPtrInst::getIndexedType(BaseType, Indices,
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true);
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if (ElTy == PTy->getValueType())
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return true; // Found a match!!
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}
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break; // No match, maybe next time.
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}
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}
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return false;
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}
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static Value *ConvertExpressionToType(Value *V, const Type *Ty) {
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assert(ExpressionConvertableToType(V, Ty) && "Value is not convertable!");
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Instruction *I = dyn_cast<Instruction>(V);
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if (I == 0)
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if (ConstPoolVal *CPV = cast<ConstPoolVal>(V)) {
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// Constants are converted by constant folding the cast that is required.
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// We assume here that all casts are implemented for constant prop.
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Value *Result = opt::ConstantFoldCastInstruction(CPV, Ty);
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if (!Result) cerr << "Couldn't fold " << CPV << " to " << Ty << endl;
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assert(Result && "ConstantFoldCastInstruction Failed!!!");
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return Result;
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}
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BasicBlock *BB = I->getParent();
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BasicBlock::InstListType &BIL = BB->getInstList();
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string Name = I->getName(); if (!Name.empty()) I->setName("");
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Instruction *Res; // Result of conversion
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//cerr << endl << endl << "Type:\t" << Ty << "\nInst: " << I << "BB Before: " << BB << endl;
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switch (I->getOpcode()) {
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case Instruction::Cast:
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Res = new CastInst(I->getOperand(0), Ty, Name);
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break;
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case Instruction::Add:
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case Instruction::Sub:
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Res = BinaryOperator::create(cast<BinaryOperator>(I)->getOpcode(),
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ConvertExpressionToType(I->getOperand(0), Ty),
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ConvertExpressionToType(I->getOperand(1), Ty),
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Name);
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break;
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case Instruction::Shl:
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case Instruction::Shr:
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Res = new ShiftInst(cast<ShiftInst>(I)->getOpcode(),
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ConvertExpressionToType(I->getOperand(0), Ty),
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I->getOperand(1), Name);
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break;
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case Instruction::Load: {
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LoadInst *LI = cast<LoadInst>(I);
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assert(!LI->hasIndices());
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Res = new LoadInst(ConvertExpressionToType(LI->getPtrOperand(),
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PointerType::get(Ty)), Name);
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break;
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}
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case Instruction::GetElementPtr: {
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// GetElementPtr's are directly convertable to a pointer type if they have
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// a number of zeros at the end. Because removing these values does not
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// change the logical offset of the GEP, it is okay and fair to remove them.
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// This can change this:
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// %t1 = getelementptr %Hosp * %hosp, ubyte 4, ubyte 0 ; <%List **>
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// %t2 = cast %List * * %t1 to %List *
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// into
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// %t2 = getelementptr %Hosp * %hosp, ubyte 4 ; <%List *>
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//
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GetElementPtrInst *GEP = cast<GetElementPtrInst>(I);
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// Check to see if there are zero elements that we can remove from the
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// index array. If there are, check to see if removing them causes us to
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// get to the right type...
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//
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vector<ConstPoolVal*> Indices = GEP->getIndices();
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const Type *BaseType = GEP->getPtrOperand()->getType();
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const Type *PVTy = cast<PointerType>(Ty)->getValueType();
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Res = 0;
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while (Indices.size() &&
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cast<ConstPoolUInt>(Indices.back())->getValue() == 0) {
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Indices.pop_back();
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if (GetElementPtrInst::getIndexedType(BaseType, Indices, true) == PVTy) {
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if (Indices.size() == 0) {
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Res = new CastInst(GEP->getPtrOperand(), BaseType); // NOOP
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} else {
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Res = new GetElementPtrInst(GEP->getPtrOperand(), Indices, Name);
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}
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break;
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}
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}
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assert(Res && "Didn't find match!");
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break; // No match, maybe next time.
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}
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default:
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assert(0 && "Expression convertable, but don't know how to convert?");
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return 0;
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}
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BasicBlock::iterator It = find(BIL.begin(), BIL.end(), I);
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assert(It != BIL.end() && "Instruction not in own basic block??");
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BIL.insert(It, Res);
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//cerr << "RInst: " << Res << "BB After: " << BB << endl << endl;
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return Res;
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}
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static inline const Type *getTy(const Value *V, ValueTypeCache &CT) {
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ValueTypeCache::iterator I = CT.find(V);
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if (I == CT.end()) return V->getType();
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return I->second;
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}
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static bool OperandConvertableToType(User *U, Value *V, const Type *Ty,
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ValueTypeCache &ConvertedTypes);
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// RetValConvertableToType - Return true if it is possible
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static bool RetValConvertableToType(Value *V, const Type *Ty,
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ValueTypeCache &ConvertedTypes) {
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ValueTypeCache::iterator I = ConvertedTypes.find(V);
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if (I != ConvertedTypes.end()) return I->second == Ty;
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ConvertedTypes[V] = Ty;
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// It is safe to convert the specified value to the specified type IFF all of
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// the uses of the value can be converted to accept the new typed value.
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//
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for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I)
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if (!OperandConvertableToType(*I, V, Ty, ConvertedTypes))
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return false;
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return true;
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}
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// OperandConvertableToType - Return true if it is possible to convert operand
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// V of User (instruction) U to the specified type. This is true iff it is
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// possible to change the specified instruction to accept this. CTMap is a map
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// of converted types, so that circular definitions will see the future type of
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// the expression, not the static current type.
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//
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static bool OperandConvertableToType(User *U, Value *V, const Type *Ty,
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ValueTypeCache &CTMap) {
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assert(V->getType() != Ty &&
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"OperandConvertableToType: Operand is already right type!");
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Instruction *I = dyn_cast<Instruction>(U);
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if (I == 0) return false; // We can't convert!
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switch (I->getOpcode()) {
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case Instruction::Cast:
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assert(I->getOperand(0) == V);
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// We can convert the expr if the cast destination type is losslessly
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// convertable to the requested type.
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return losslessCastableTypes(Ty, I->getOperand(0)->getType());
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case Instruction::Add:
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case Instruction::Sub: {
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Value *OtherOp = I->getOperand((V == I->getOperand(0)) ? 1 : 0);
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return RetValConvertableToType(I, Ty, CTMap) &&
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ExpressionConvertableToType(OtherOp, Ty);
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}
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case Instruction::SetEQ:
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case Instruction::SetNE: {
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Value *OtherOp = I->getOperand((V == I->getOperand(0)) ? 1 : 0);
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return ExpressionConvertableToType(OtherOp, Ty);
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}
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case Instruction::Shr:
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if (Ty->isSigned() != V->getType()->isSigned()) return false;
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// FALL THROUGH
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case Instruction::Shl:
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assert(I->getOperand(0) == V);
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return RetValConvertableToType(I, Ty, CTMap);
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case Instruction::Load:
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assert(I->getOperand(0) == V);
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if (const PointerType *PT = dyn_cast<PointerType>(Ty)) {
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LoadInst *LI = cast<LoadInst>(I);
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if (LI->hasIndices() ||
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TD.getTypeSize(PT->getValueType()) != TD.getTypeSize(LI->getType()))
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return false;
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return RetValConvertableToType(LI, PT->getValueType(), CTMap);
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}
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return false;
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case Instruction::Store: {
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StoreInst *SI = cast<StoreInst>(I);
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if (SI->hasIndices()) return false;
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if (V == I->getOperand(0)) {
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// Can convert the store if we can convert the pointer operand to match
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// the new value type...
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return ExpressionConvertableToType(I->getOperand(1),PointerType::get(Ty));
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} else if (const PointerType *PT = dyn_cast<PointerType>(Ty)) {
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if (isa<ArrayType>(PT->getValueType()))
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return false; // Avoid getDataSize on unsized array type!
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assert(V == I->getOperand(1));
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// Must move the same amount of data...
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if (TD.getTypeSize(PT->getValueType()) !=
|
||||
TD.getTypeSize(I->getOperand(0)->getType())) return false;
|
||||
|
||||
// Can convert store if the incoming value is convertable...
|
||||
return ExpressionConvertableToType(I->getOperand(0), PT->getValueType());
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
#if 0
|
||||
case Instruction::GetElementPtr: {
|
||||
// GetElementPtr's are directly convertable to a pointer type if they have
|
||||
// a number of zeros at the end. Because removing these values does not
|
||||
// change the logical offset of the GEP, it is okay and fair to remove them.
|
||||
// This can change this:
|
||||
// %t1 = getelementptr %Hosp * %hosp, ubyte 4, ubyte 0 ; <%List **>
|
||||
// %t2 = cast %List * * %t1 to %List *
|
||||
// into
|
||||
// %t2 = getelementptr %Hosp * %hosp, ubyte 4 ; <%List *>
|
||||
//
|
||||
GetElementPtrInst *GEP = cast<GetElementPtrInst>(I);
|
||||
const PointerType *PTy = dyn_cast<PointerType>(Ty);
|
||||
if (!PTy) return false;
|
||||
|
||||
// Check to see if there are zero elements that we can remove from the
|
||||
// index array. If there are, check to see if removing them causes us to
|
||||
// get to the right type...
|
||||
//
|
||||
vector<ConstPoolVal*> Indices = GEP->getIndices();
|
||||
const Type *BaseType = GEP->getPtrOperand()->getType();
|
||||
|
||||
while (Indices.size() &&
|
||||
cast<ConstPoolUInt>(Indices.back())->getValue() == 0) {
|
||||
Indices.pop_back();
|
||||
const Type *ElTy = GetElementPtrInst::getIndexedType(BaseType, Indices,
|
||||
true);
|
||||
if (ElTy == PTy->getValueType())
|
||||
return true; // Found a match!!
|
||||
}
|
||||
break; // No match, maybe next time.
|
||||
}
|
||||
#endif
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
static void ConvertOperandToType(User *U, Value *OldVal, Value *NewVal,
|
||||
ValueMapCache &VMC);
|
||||
|
||||
// RetValConvertableToType - Return true if it is possible
|
||||
static void ConvertUsersType(Value *V, Value *NewVal, ValueMapCache &VMC) {
|
||||
|
||||
// It is safe to convert the specified value to the specified type IFF all of
|
||||
// the uses of the value can be converted to accept the new typed value.
|
||||
//
|
||||
while (!V->use_empty()) {
|
||||
unsigned OldSize = V->use_size();
|
||||
ConvertOperandToType(V->use_back(), V, NewVal, VMC);
|
||||
assert(V->use_size() != OldSize && "Use didn't detatch from value!");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void ConvertOperandToType(User *U, Value *OldVal, Value *NewVal,
|
||||
ValueMapCache &VMC) {
|
||||
Instruction *I = cast<Instruction>(U); // Only Instructions convertable
|
||||
|
||||
BasicBlock *BB = I->getParent();
|
||||
BasicBlock::InstListType &BIL = BB->getInstList();
|
||||
string Name = I->getName(); if (!Name.empty()) I->setName("");
|
||||
Instruction *Res; // Result of conversion
|
||||
|
||||
//cerr << endl << endl << "Type:\t" << Ty << "\nInst: " << I << "BB Before: " << BB << endl;
|
||||
|
||||
switch (I->getOpcode()) {
|
||||
case Instruction::Cast:
|
||||
assert(I->getOperand(0) == OldVal);
|
||||
Res = new CastInst(NewVal, I->getType(), Name);
|
||||
break;
|
||||
|
||||
case Instruction::Add:
|
||||
case Instruction::Sub:
|
||||
case Instruction::SetEQ:
|
||||
case Instruction::SetNE: {
|
||||
unsigned OtherIdx = (OldVal == I->getOperand(0)) ? 1 : 0;
|
||||
Value *OtherOp = I->getOperand(OtherIdx);
|
||||
Value *NewOther = ConvertExpressionToType(OtherOp, NewVal->getType());
|
||||
|
||||
Res = BinaryOperator::create(cast<BinaryOperator>(I)->getOpcode(),
|
||||
OtherIdx == 0 ? NewOther : NewVal,
|
||||
OtherIdx == 1 ? NewOther : NewVal,
|
||||
Name);
|
||||
break;
|
||||
}
|
||||
case Instruction::Shl:
|
||||
case Instruction::Shr:
|
||||
assert(I->getOperand(0) == OldVal);
|
||||
Res = new ShiftInst(cast<ShiftInst>(I)->getOpcode(), NewVal,
|
||||
I->getOperand(1), Name);
|
||||
break;
|
||||
|
||||
case Instruction::Load:
|
||||
assert(I->getOperand(0) == OldVal);
|
||||
Res = new LoadInst(NewVal, Name);
|
||||
break;
|
||||
|
||||
case Instruction::Store: {
|
||||
if (I->getOperand(0) == OldVal) { // Replace the source value
|
||||
Value *NewPtr =
|
||||
ConvertExpressionToType(I->getOperand(1),
|
||||
PointerType::get(NewVal->getType()));
|
||||
Res = new StoreInst(NewVal, NewPtr);
|
||||
} else { // Replace the source pointer
|
||||
const Type *ValType =cast<PointerType>(NewVal->getType())->getValueType();
|
||||
Value *NewV = ConvertExpressionToType(I->getOperand(0), ValType);
|
||||
Res = new StoreInst(NewV, NewVal);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
#if 0
|
||||
case Instruction::GetElementPtr: {
|
||||
// GetElementPtr's are directly convertable to a pointer type if they have
|
||||
// a number of zeros at the end. Because removing these values does not
|
||||
// change the logical offset of the GEP, it is okay and fair to remove them.
|
||||
// This can change this:
|
||||
// %t1 = getelementptr %Hosp * %hosp, ubyte 4, ubyte 0 ; <%List **>
|
||||
// %t2 = cast %List * * %t1 to %List *
|
||||
// into
|
||||
// %t2 = getelementptr %Hosp * %hosp, ubyte 4 ; <%List *>
|
||||
//
|
||||
GetElementPtrInst *GEP = cast<GetElementPtrInst>(I);
|
||||
|
||||
// Check to see if there are zero elements that we can remove from the
|
||||
// index array. If there are, check to see if removing them causes us to
|
||||
// get to the right type...
|
||||
//
|
||||
vector<ConstPoolVal*> Indices = GEP->getIndices();
|
||||
const Type *BaseType = GEP->getPtrOperand()->getType();
|
||||
const Type *PVTy = cast<PointerType>(Ty)->getValueType();
|
||||
Res = 0;
|
||||
while (Indices.size() &&
|
||||
cast<ConstPoolUInt>(Indices.back())->getValue() == 0) {
|
||||
Indices.pop_back();
|
||||
if (GetElementPtrInst::getIndexedType(BaseType, Indices, true) == PVTy) {
|
||||
if (Indices.size() == 0) {
|
||||
Res = new CastInst(GEP->getPtrOperand(), BaseType); // NOOP
|
||||
} else {
|
||||
Res = new GetElementPtrInst(GEP->getPtrOperand(), Indices, Name);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
assert(Res && "Didn't find match!");
|
||||
break; // No match, maybe next time.
|
||||
}
|
||||
#endif
|
||||
|
||||
default:
|
||||
assert(0 && "Expression convertable, but don't know how to convert?");
|
||||
return;
|
||||
}
|
||||
|
||||
BasicBlock::iterator It = find(BIL.begin(), BIL.end(), I);
|
||||
assert(It != BIL.end() && "Instruction not in own basic block??");
|
||||
BIL.insert(It, Res); // Keep It pointing to old instruction
|
||||
|
||||
#if DEBUG_PEEPHOLE_INSTS
|
||||
cerr << "In: " << I << "Out: " << Res;
|
||||
#endif
|
||||
|
||||
//cerr << "RInst: " << Res << "BB After: " << BB << endl << endl;
|
||||
|
||||
if (I->getType() != Res->getType())
|
||||
ConvertUsersType(I, Res, VMC);
|
||||
else
|
||||
I->replaceAllUsesWith(Res);
|
||||
|
||||
// Now we just need to remove the old instruction so we don't get infinite
|
||||
// loops. Note that we cannot use DCE because DCE won't remove a store
|
||||
// instruction, for example.
|
||||
assert(I->use_size() == 0 && "Uses of Instruction remain!!!");
|
||||
|
||||
It = find(BIL.begin(), BIL.end(), I);
|
||||
assert(It != BIL.end() && "Instruction no longer in basic block??");
|
||||
delete BIL.remove(It);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// DoInsertArrayCast - If the argument value has a pointer type, and if the
|
||||
|
89
lib/Transforms/TransformInternals.cpp
Normal file
89
lib/Transforms/TransformInternals.cpp
Normal file
@ -0,0 +1,89 @@
|
||||
//===-- TransformInternals.cpp - Implement shared functions for transforms --=//
|
||||
//
|
||||
// This file defines shared functions used by the different components of the
|
||||
// Transforms library.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "TransformInternals.h"
|
||||
#include "llvm/Method.h"
|
||||
#include "llvm/Type.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!");
|
||||
|
||||
// losslessCastableTypes - Return true if the types are bitwise equivalent.
|
||||
// This predicate returns true if it is possible to cast from one type to
|
||||
// another without gaining or losing precision, or altering the bits in any way.
|
||||
//
|
||||
bool losslessCastableTypes(const Type *T1, const Type *T2) {
|
||||
if (!T1->isPrimitiveType() && !T1->isPointerType()) return false;
|
||||
if (!T2->isPrimitiveType() && !T2->isPointerType()) return false;
|
||||
|
||||
if (T1->getPrimitiveID() == T2->getPrimitiveID())
|
||||
return true; // Handles identity cast, and cast of differing pointer types
|
||||
|
||||
// Now we know that they are two differing primitive or pointer types
|
||||
switch (T1->getPrimitiveID()) {
|
||||
case Type::UByteTyID: return T2 == Type::SByteTy;
|
||||
case Type::SByteTyID: return T2 == Type::UByteTy;
|
||||
case Type::UShortTyID: return T2 == Type::ShortTy;
|
||||
case Type::ShortTyID: return T2 == Type::UShortTy;
|
||||
case Type::UIntTyID: return T2 == Type::IntTy;
|
||||
case Type::IntTyID: return T2 == Type::UIntTy;
|
||||
case Type::ULongTyID:
|
||||
case Type::LongTyID:
|
||||
case Type::PointerTyID:
|
||||
return T2 == Type::ULongTy || T2 == Type::LongTy ||
|
||||
T2->getPrimitiveID() == Type::PointerTyID;
|
||||
default:
|
||||
return false; // Other types have no identity values
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
|
||||
// with a value, then remove and delete the original instruction.
|
||||
//
|
||||
void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
|
||||
BasicBlock::iterator &BI, Value *V) {
|
||||
Instruction *I = *BI;
|
||||
// Replaces all of the uses of the instruction with uses of the value
|
||||
I->replaceAllUsesWith(V);
|
||||
|
||||
// Remove the unneccesary instruction now...
|
||||
BIL.remove(BI);
|
||||
|
||||
// Make sure to propogate a name if there is one already...
|
||||
if (I->hasName() && !V->hasName())
|
||||
V->setName(I->getName(), BIL.getParent()->getSymbolTable());
|
||||
|
||||
// Remove the dead instruction now...
|
||||
delete I;
|
||||
}
|
||||
|
||||
|
||||
// ReplaceInstWithInst - Replace the instruction specified by BI with the
|
||||
// instruction specified by I. The original instruction is deleted and BI is
|
||||
// updated to point to the new instruction.
|
||||
//
|
||||
void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
|
||||
BasicBlock::iterator &BI, Instruction *I) {
|
||||
assert(I->getParent() == 0 &&
|
||||
"ReplaceInstWithInst: Instruction already inserted into basic block!");
|
||||
|
||||
// Insert the new instruction into the basic block...
|
||||
BI = BIL.insert(BI, I)+1;
|
||||
|
||||
// Replace all uses of the old instruction, and delete it.
|
||||
ReplaceInstWithValue(BIL, BI, I);
|
||||
|
||||
// Reexamine the instruction just inserted next time around the cleanup pass
|
||||
// loop.
|
||||
--BI;
|
||||
}
|
||||
|
||||
|
56
lib/Transforms/TransformInternals.h
Normal file
56
lib/Transforms/TransformInternals.h
Normal file
@ -0,0 +1,56 @@
|
||||
//===-- TransformInternals.h - Shared functions for Transforms ---*- C++ -*--=//
|
||||
//
|
||||
// This header file declares shared functions used by the different components
|
||||
// of the Transforms library.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#ifndef TRANSFORM_INTERNALS_H
|
||||
#define TRANSFORM_INTERNALS_H
|
||||
|
||||
#include "llvm/BasicBlock.h"
|
||||
#include "llvm/Target/TargetData.h"
|
||||
#include <map>
|
||||
|
||||
// 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.
|
||||
//
|
||||
// FIXME: This should use annotations
|
||||
//
|
||||
extern const TargetData TD;
|
||||
|
||||
// losslessCastableTypes - Return true if the types are bitwise equivalent.
|
||||
// This predicate returns true if it is possible to cast from one type to
|
||||
// another without gaining or losing precision, or altering the bits in any way.
|
||||
//
|
||||
bool losslessCastableTypes(const Type *T1, const Type *T2);
|
||||
|
||||
|
||||
// ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
|
||||
// with a value, then remove and delete the original instruction.
|
||||
//
|
||||
void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
|
||||
BasicBlock::iterator &BI, Value *V);
|
||||
|
||||
// ReplaceInstWithInst - Replace the instruction specified by BI with the
|
||||
// instruction specified by I. The original instruction is deleted and BI is
|
||||
// updated to point to the new instruction.
|
||||
//
|
||||
void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
|
||||
BasicBlock::iterator &BI, Instruction *I);
|
||||
|
||||
|
||||
// ------------- Expression Conversion ---------------------
|
||||
|
||||
typedef map<const Value*, const Type*> ValueTypeCache;
|
||||
typedef map<const Value*, Value*> ValueMapCache;
|
||||
|
||||
// RetValConvertableToType - Return true if it is possible
|
||||
bool RetValConvertableToType(Value *V, const Type *Ty,
|
||||
ValueTypeCache &ConvertedTypes);
|
||||
|
||||
void ConvertUsersType(Value *V, Value *NewVal, ValueMapCache &VMC);
|
||||
|
||||
|
||||
#endif
|
Loading…
Reference in New Issue
Block a user