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authorOwen Anderson <resistor@mac.com>2009-06-22 21:39:50 +0000
committerOwen Anderson <resistor@mac.com>2009-06-22 21:39:50 +0000
commit372b46cad9f745859f542f9d2216991585ae83f4 (patch)
tree7d2038817349cb030a0b49423a325620dbaa1cb5 /lib/Analysis
parent9170ab6685fcd820c6274e761b8c3a71f25ae074 (diff)
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SCEVHandle is no more!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73906 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis')
-rw-r--r--lib/Analysis/IVUsers.cpp28
-rw-r--r--lib/Analysis/LoopVR.cpp14
-rw-r--r--lib/Analysis/ScalarEvolution.cpp511
-rw-r--r--lib/Analysis/ScalarEvolutionExpander.cpp68
4 files changed, 310 insertions, 311 deletions
diff --git a/lib/Analysis/IVUsers.cpp b/lib/Analysis/IVUsers.cpp
index 6a53a83665..caeb14bef3 100644
--- a/lib/Analysis/IVUsers.cpp
+++ b/lib/Analysis/IVUsers.cpp
@@ -39,7 +39,7 @@ Pass *llvm::createIVUsersPass() {
/// containsAddRecFromDifferentLoop - Determine whether expression S involves a
/// subexpression that is an AddRec from a loop other than L. An outer loop
/// of L is OK, but not an inner loop nor a disjoint loop.
-static bool containsAddRecFromDifferentLoop(SCEVHandle S, Loop *L) {
+static bool containsAddRecFromDifferentLoop(const SCEV* S, Loop *L) {
// This is very common, put it first.
if (isa<SCEVConstant>(S))
return false;
@@ -80,10 +80,10 @@ static bool containsAddRecFromDifferentLoop(SCEVHandle S, Loop *L) {
/// a mix of loop invariant and loop variant expressions. The start cannot,
/// however, contain an AddRec from a different loop, unless that loop is an
/// outer loop of the current loop.
-static bool getSCEVStartAndStride(const SCEVHandle &SH, Loop *L, Loop *UseLoop,
- SCEVHandle &Start, SCEVHandle &Stride,
+static bool getSCEVStartAndStride(const SCEV* &SH, Loop *L, Loop *UseLoop,
+ const SCEV* &Start, const SCEV* &Stride,
ScalarEvolution *SE, DominatorTree *DT) {
- SCEVHandle TheAddRec = Start; // Initialize to zero.
+ const SCEV* TheAddRec = Start; // Initialize to zero.
// If the outer level is an AddExpr, the operands are all start values except
// for a nested AddRecExpr.
@@ -109,9 +109,9 @@ static bool getSCEVStartAndStride(const SCEVHandle &SH, Loop *L, Loop *UseLoop,
// Use getSCEVAtScope to attempt to simplify other loops out of
// the picture.
- SCEVHandle AddRecStart = AddRec->getStart();
+ const SCEV* AddRecStart = AddRec->getStart();
AddRecStart = SE->getSCEVAtScope(AddRecStart, UseLoop);
- SCEVHandle AddRecStride = AddRec->getStepRecurrence(*SE);
+ const SCEV* AddRecStride = AddRec->getStepRecurrence(*SE);
// FIXME: If Start contains an SCEVAddRecExpr from a different loop, other
// than an outer loop of the current loop, reject it. LSR has no concept of
@@ -196,13 +196,13 @@ bool IVUsers::AddUsersIfInteresting(Instruction *I) {
return true; // Instruction already handled.
// Get the symbolic expression for this instruction.
- SCEVHandle ISE = SE->getSCEV(I);
+ const SCEV* ISE = SE->getSCEV(I);
if (isa<SCEVCouldNotCompute>(ISE)) return false;
// Get the start and stride for this expression.
Loop *UseLoop = LI->getLoopFor(I->getParent());
- SCEVHandle Start = SE->getIntegerSCEV(0, ISE->getType());
- SCEVHandle Stride = Start;
+ const SCEV* Start = SE->getIntegerSCEV(0, ISE->getType());
+ const SCEV* Stride = Start;
if (!getSCEVStartAndStride(ISE, L, UseLoop, Start, Stride, SE, DT))
return false; // Non-reducible symbolic expression, bail out.
@@ -254,7 +254,7 @@ bool IVUsers::AddUsersIfInteresting(Instruction *I) {
if (IVUseShouldUsePostIncValue(User, I, L, LI, DT, this)) {
// The value used will be incremented by the stride more than we are
// expecting, so subtract this off.
- SCEVHandle NewStart = SE->getMinusSCEV(Start, Stride);
+ const SCEV* NewStart = SE->getMinusSCEV(Start, Stride);
StrideUses->addUser(NewStart, User, I);
StrideUses->Users.back().setIsUseOfPostIncrementedValue(true);
DOUT << " USING POSTINC SCEV, START=" << *NewStart<< "\n";
@@ -295,9 +295,9 @@ bool IVUsers::runOnLoop(Loop *l, LPPassManager &LPM) {
/// getReplacementExpr - Return a SCEV expression which computes the
/// value of the OperandValToReplace of the given IVStrideUse.
-SCEVHandle IVUsers::getReplacementExpr(const IVStrideUse &U) const {
+const SCEV* IVUsers::getReplacementExpr(const IVStrideUse &U) const {
// Start with zero.
- SCEVHandle RetVal = SE->getIntegerSCEV(0, U.getParent()->Stride->getType());
+ const SCEV* RetVal = SE->getIntegerSCEV(0, U.getParent()->Stride->getType());
// Create the basic add recurrence.
RetVal = SE->getAddRecExpr(RetVal, U.getParent()->Stride, L);
// Add the offset in a separate step, because it may be loop-variant.
@@ -308,7 +308,7 @@ SCEVHandle IVUsers::getReplacementExpr(const IVStrideUse &U) const {
RetVal = SE->getAddExpr(RetVal, U.getParent()->Stride);
// Evaluate the expression out of the loop, if possible.
if (!L->contains(U.getUser()->getParent())) {
- SCEVHandle ExitVal = SE->getSCEVAtScope(RetVal, L->getParentLoop());
+ const SCEV* ExitVal = SE->getSCEVAtScope(RetVal, L->getParentLoop());
if (ExitVal->isLoopInvariant(L))
RetVal = ExitVal;
}
@@ -325,7 +325,7 @@ void IVUsers::print(raw_ostream &OS, const Module *M) const {
OS << ":\n";
for (unsigned Stride = 0, e = StrideOrder.size(); Stride != e; ++Stride) {
- std::map<SCEVHandle, IVUsersOfOneStride*>::const_iterator SI =
+ std::map<const SCEV*, IVUsersOfOneStride*>::const_iterator SI =
IVUsesByStride.find(StrideOrder[Stride]);
assert(SI != IVUsesByStride.end() && "Stride doesn't exist!");
OS << " Stride " << *SI->first->getType() << " " << *SI->first << ":\n";
diff --git a/lib/Analysis/LoopVR.cpp b/lib/Analysis/LoopVR.cpp
index 0a3d06bed7..ae715ac586 100644
--- a/lib/Analysis/LoopVR.cpp
+++ b/lib/Analysis/LoopVR.cpp
@@ -26,8 +26,8 @@ char LoopVR::ID = 0;
static RegisterPass<LoopVR> X("loopvr", "Loop Value Ranges", false, true);
/// getRange - determine the range for a particular SCEV within a given Loop
-ConstantRange LoopVR::getRange(SCEVHandle S, Loop *L, ScalarEvolution &SE) {
- SCEVHandle T = SE.getBackedgeTakenCount(L);
+ConstantRange LoopVR::getRange(const SCEV* S, Loop *L, ScalarEvolution &SE) {
+ const SCEV* T = SE.getBackedgeTakenCount(L);
if (isa<SCEVCouldNotCompute>(T))
return ConstantRange(cast<IntegerType>(S->getType())->getBitWidth(), true);
@@ -36,7 +36,7 @@ ConstantRange LoopVR::getRange(SCEVHandle S, Loop *L, ScalarEvolution &SE) {
}
/// getRange - determine the range for a particular SCEV with a given trip count
-ConstantRange LoopVR::getRange(SCEVHandle S, SCEVHandle T, ScalarEvolution &SE){
+ConstantRange LoopVR::getRange(const SCEV* S, const SCEV* T, ScalarEvolution &SE){
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(S))
return ConstantRange(C->getValue()->getValue());
@@ -182,8 +182,8 @@ ConstantRange LoopVR::getRange(SCEVHandle S, SCEVHandle T, ScalarEvolution &SE){
if (!Trip) return FullSet;
if (AddRec->isAffine()) {
- SCEVHandle StartHandle = AddRec->getStart();
- SCEVHandle StepHandle = AddRec->getOperand(1);
+ const SCEV* StartHandle = AddRec->getStart();
+ const SCEV* StepHandle = AddRec->getOperand(1);
const SCEVConstant *Step = dyn_cast<SCEVConstant>(StepHandle);
if (!Step) return FullSet;
@@ -194,7 +194,7 @@ ConstantRange LoopVR::getRange(SCEVHandle S, SCEVHandle T, ScalarEvolution &SE){
if ((TripExt * StepExt).ugt(APInt::getLowBitsSet(ExWidth, ExWidth >> 1)))
return FullSet;
- SCEVHandle EndHandle = SE.getAddExpr(StartHandle,
+ const SCEV* EndHandle = SE.getAddExpr(StartHandle,
SE.getMulExpr(T, StepHandle));
const SCEVConstant *Start = dyn_cast<SCEVConstant>(StartHandle);
const SCEVConstant *End = dyn_cast<SCEVConstant>(EndHandle);
@@ -254,7 +254,7 @@ ConstantRange LoopVR::compute(Value *V) {
ScalarEvolution &SE = getAnalysis<ScalarEvolution>();
- SCEVHandle S = SE.getSCEV(I);
+ const SCEV* S = SE.getSCEV(I);
if (isa<SCEVUnknown>(S) || isa<SCEVCouldNotCompute>(S))
return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false);
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index d9394805c8..f45562363a 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -14,7 +14,7 @@
// There are several aspects to this library. First is the representation of
// scalar expressions, which are represented as subclasses of the SCEV class.
// These classes are used to represent certain types of subexpressions that we
-// can handle. These classes are reference counted, managed by the SCEVHandle
+// can handle. These classes are reference counted, managed by the const SCEV*
// class. We only create one SCEV of a particular shape, so pointer-comparisons
// for equality are legal.
//
@@ -152,9 +152,9 @@ bool SCEVCouldNotCompute::hasComputableLoopEvolution(const Loop *L) const {
return false;
}
-SCEVHandle SCEVCouldNotCompute::
-replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc,
+const SCEV* SCEVCouldNotCompute::
+replaceSymbolicValuesWithConcrete(const SCEV* Sym,
+ const SCEV* Conc,
ScalarEvolution &SE) const {
return this;
}
@@ -169,20 +169,20 @@ bool SCEVCouldNotCompute::classof(const SCEV *S) {
// SCEVConstants - Only allow the creation of one SCEVConstant for any
-// particular value. Don't use a SCEVHandle here, or else the object will
+// particular value. Don't use a const SCEV* here, or else the object will
// never be deleted!
-SCEVHandle ScalarEvolution::getConstant(ConstantInt *V) {
+const SCEV* ScalarEvolution::getConstant(ConstantInt *V) {
SCEVConstant *&R = SCEVConstants[V];
if (R == 0) R = new SCEVConstant(V, this);
return R;
}
-SCEVHandle ScalarEvolution::getConstant(const APInt& Val) {
+const SCEV* ScalarEvolution::getConstant(const APInt& Val) {
return getConstant(ConstantInt::get(Val));
}
-SCEVHandle
+const SCEV*
ScalarEvolution::getConstant(const Type *Ty, uint64_t V, bool isSigned) {
return getConstant(ConstantInt::get(cast<IntegerType>(Ty), V, isSigned));
}
@@ -194,7 +194,7 @@ void SCEVConstant::print(raw_ostream &OS) const {
}
SCEVCastExpr::SCEVCastExpr(unsigned SCEVTy,
- const SCEVHandle &op, const Type *ty,
+ const SCEV* op, const Type *ty,
const ScalarEvolution* p)
: SCEV(SCEVTy, p), Op(op), Ty(ty) {}
@@ -205,10 +205,10 @@ bool SCEVCastExpr::dominates(BasicBlock *BB, DominatorTree *DT) const {
}
// SCEVTruncates - Only allow the creation of one SCEVTruncateExpr for any
-// particular input. Don't use a SCEVHandle here, or else the object will
+// particular input. Don't use a const SCEV* here, or else the object will
// never be deleted!
-SCEVTruncateExpr::SCEVTruncateExpr(const SCEVHandle &op, const Type *ty,
+SCEVTruncateExpr::SCEVTruncateExpr(const SCEV* op, const Type *ty,
const ScalarEvolution* p)
: SCEVCastExpr(scTruncate, op, ty, p) {
assert((Op->getType()->isInteger() || isa<PointerType>(Op->getType())) &&
@@ -222,10 +222,10 @@ void SCEVTruncateExpr::print(raw_ostream &OS) const {
}
// SCEVZeroExtends - Only allow the creation of one SCEVZeroExtendExpr for any
-// particular input. Don't use a SCEVHandle here, or else the object will never
+// particular input. Don't use a const SCEV* here, or else the object will never
// be deleted!
-SCEVZeroExtendExpr::SCEVZeroExtendExpr(const SCEVHandle &op, const Type *ty,
+SCEVZeroExtendExpr::SCEVZeroExtendExpr(const SCEV* op, const Type *ty,
const ScalarEvolution* p)
: SCEVCastExpr(scZeroExtend, op, ty, p) {
assert((Op->getType()->isInteger() || isa<PointerType>(Op->getType())) &&
@@ -238,10 +238,10 @@ void SCEVZeroExtendExpr::print(raw_ostream &OS) const {
}
// SCEVSignExtends - Only allow the creation of one SCEVSignExtendExpr for any
-// particular input. Don't use a SCEVHandle here, or else the object will never
+// particular input. Don't use a const SCEV* here, or else the object will never
// be deleted!
-SCEVSignExtendExpr::SCEVSignExtendExpr(const SCEVHandle &op, const Type *ty,
+SCEVSignExtendExpr::SCEVSignExtendExpr(const SCEV* op, const Type *ty,
const ScalarEvolution* p)
: SCEVCastExpr(scSignExtend, op, ty, p) {
assert((Op->getType()->isInteger() || isa<PointerType>(Op->getType())) &&
@@ -254,7 +254,7 @@ void SCEVSignExtendExpr::print(raw_ostream &OS) const {
}
// SCEVCommExprs - Only allow the creation of one SCEVCommutativeExpr for any
-// particular input. Don't use a SCEVHandle here, or else the object will never
+// particular input. Don't use a const SCEV* here, or else the object will never
// be deleted!
void SCEVCommutativeExpr::print(raw_ostream &OS) const {
@@ -266,15 +266,15 @@ void SCEVCommutativeExpr::print(raw_ostream &OS) const {
OS << ")";
}
-SCEVHandle SCEVCommutativeExpr::
-replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc,
+const SCEV* SCEVCommutativeExpr::
+replaceSymbolicValuesWithConcrete(const SCEV* Sym,
+ const SCEV* Conc,
ScalarEvolution &SE) const {
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
- SCEVHandle H =
+ const SCEV* H =
getOperand(i)->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
if (H != getOperand(i)) {
- SmallVector<SCEVHandle, 8> NewOps;
+ SmallVector<const SCEV*, 8> NewOps;
NewOps.reserve(getNumOperands());
for (unsigned j = 0; j != i; ++j)
NewOps.push_back(getOperand(j));
@@ -308,7 +308,7 @@ bool SCEVNAryExpr::dominates(BasicBlock *BB, DominatorTree *DT) const {
// SCEVUDivs - Only allow the creation of one SCEVUDivExpr for any particular
-// input. Don't use a SCEVHandle here, or else the object will never be
+// input. Don't use a const SCEV* here, or else the object will never be
// deleted!
bool SCEVUDivExpr::dominates(BasicBlock *BB, DominatorTree *DT) const {
@@ -329,18 +329,18 @@ const Type *SCEVUDivExpr::getType() const {
}
// SCEVAddRecExprs - Only allow the creation of one SCEVAddRecExpr for any
-// particular input. Don't use a SCEVHandle here, or else the object will never
+// particular input. Don't use a const SCEV* here, or else the object will never
// be deleted!
-SCEVHandle SCEVAddRecExpr::
-replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc,
+const SCEV* SCEVAddRecExpr::
+replaceSymbolicValuesWithConcrete(const SCEV* Sym,
+ const SCEV* Conc,
ScalarEvolution &SE) const {
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
- SCEVHandle H =
+ const SCEV* H =
getOperand(i)->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
if (H != getOperand(i)) {
- SmallVector<SCEVHandle, 8> NewOps;
+ SmallVector<const SCEV*, 8> NewOps;
NewOps.reserve(getNumOperands());
for (unsigned j = 0; j != i; ++j)
NewOps.push_back(getOperand(j));
@@ -374,7 +374,7 @@ void SCEVAddRecExpr::print(raw_ostream &OS) const {
}
// SCEVUnknowns - Only allow the creation of one SCEVUnknown for any particular
-// value. Don't use a SCEVHandle here, or else the object will never be
+// value. Don't use a const SCEV* here, or else the object will never be
// deleted!
bool SCEVUnknown::isLoopInvariant(const Loop *L) const {
@@ -531,7 +531,7 @@ namespace {
/// this to depend on where the addresses of various SCEV objects happened to
/// land in memory.
///
-static void GroupByComplexity(SmallVectorImpl<SCEVHandle> &Ops,
+static void GroupByComplexity(SmallVectorImpl<const SCEV*> &Ops,
LoopInfo *LI) {
if (Ops.size() < 2) return; // Noop
if (Ops.size() == 2) {
@@ -574,7 +574,7 @@ static void GroupByComplexity(SmallVectorImpl<SCEVHandle> &Ops,
/// BinomialCoefficient - Compute BC(It, K). The result has width W.
/// Assume, K > 0.
-static SCEVHandle BinomialCoefficient(SCEVHandle It, unsigned K,
+static const SCEV* BinomialCoefficient(const SCEV* It, unsigned K,
ScalarEvolution &SE,
const Type* ResultTy) {
// Handle the simplest case efficiently.
@@ -667,15 +667,15 @@ static SCEVHandle BinomialCoefficient(SCEVHandle It, unsigned K,
// Calculate the product, at width T+W
const IntegerType *CalculationTy = IntegerType::get(CalculationBits);
- SCEVHandle Dividend = SE.getTruncateOrZeroExtend(It, CalculationTy);
+ const SCEV* Dividend = SE.getTruncateOrZeroExtend(It, CalculationTy);
for (unsigned i = 1; i != K; ++i) {
- SCEVHandle S = SE.getMinusSCEV(It, SE.getIntegerSCEV(i, It->getType()));
+ const SCEV* S = SE.getMinusSCEV(It, SE.getIntegerSCEV(i, It->getType()));
Dividend = SE.getMulExpr(Dividend,
SE.getTruncateOrZeroExtend(S, CalculationTy));
}
// Divide by 2^T
- SCEVHandle DivResult = SE.getUDivExpr(Dividend, SE.getConstant(DivFactor));
+ const SCEV* DivResult = SE.getUDivExpr(Dividend, SE.getConstant(DivFactor));
// Truncate the result, and divide by K! / 2^T.
@@ -692,14 +692,14 @@ static SCEVHandle BinomialCoefficient(SCEVHandle It, unsigned K,
///
/// where BC(It, k) stands for binomial coefficient.
///
-SCEVHandle SCEVAddRecExpr::evaluateAtIteration(SCEVHandle It,
+const SCEV* SCEVAddRecExpr::evaluateAtIteration(const SCEV* It,
ScalarEvolution &SE) const {
- SCEVHandle Result = getStart();
+ const SCEV* Result = getStart();
for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
// The computation is correct in the face of overflow provided that the
// multiplication is performed _after_ the evaluation of the binomial
// coefficient.
- SCEVHandle Coeff = BinomialCoefficient(It, i, SE, getType());
+ const SCEV* Coeff = BinomialCoefficient(It, i, SE, getType());
if (isa<SCEVCouldNotCompute>(Coeff))
return Coeff;
@@ -712,7 +712,7 @@ SCEVHandle SCEVAddRecExpr::evaluateAtIteration(SCEVHandle It,
// SCEV Expression folder implementations
//===----------------------------------------------------------------------===//
-SCEVHandle ScalarEvolution::getTruncateExpr(const SCEVHandle &Op,
+const SCEV* ScalarEvolution::getTruncateExpr(const SCEV* Op,
const Type *Ty) {
assert(getTypeSizeInBits(Op->getType()) > getTypeSizeInBits(Ty) &&
"This is not a truncating conversion!");
@@ -738,7 +738,7 @@ SCEVHandle ScalarEvolution::getTruncateExpr(const SCEVHandle &Op,
// If the input value is a chrec scev, truncate the chrec's operands.
if (const SCEVAddRecExpr *AddRec = dyn_cast<SCEVAddRecExpr>(Op)) {
- SmallVector<SCEVHandle, 4> Operands;
+ SmallVector<const SCEV*, 4> Operands;
for (unsigned i = 0, e = AddRec->getNumOperands(); i != e; ++i)
Operands.push_back(getTruncateExpr(AddRec->getOperand(i), Ty));
return getAddRecExpr(Operands, AddRec->getLoop());
@@ -749,7 +749,7 @@ SCEVHandle ScalarEvolution::getTruncateExpr(const SCEVHandle &Op,
return Result;
}
-SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op,
+const SCEV* ScalarEvolution::getZeroExtendExpr(const SCEV* Op,
const Type *Ty) {
assert(getTypeSizeInBits(Op->getType()) < getTypeSizeInBits(Ty) &&
"This is not an extending conversion!");
@@ -782,28 +782,28 @@ SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op,
// in infinite recursion. In the later case, the analysis code will
// cope with a conservative value, and it will take care to purge
// that value once it has finished.
- SCEVHandle MaxBECount = getMaxBackedgeTakenCount(AR->getLoop());
+ const SCEV* MaxBECount = getMaxBackedgeTakenCount(AR->getLoop());
if (!isa<SCEVCouldNotCompute>(MaxBECount)) {
// Manually compute the final value for AR, checking for
// overflow.
- SCEVHandle Start = AR->getStart();
- SCEVHandle Step = AR->getStepRecurrence(*this);
+ const SCEV* Start = AR->getStart();
+ const SCEV* Step = AR->getStepRecurrence(*this);
// Check whether the backedge-taken count can be losslessly casted to
// the addrec's type. The count is always unsigned.
- SCEVHandle CastedMaxBECount =
+ const SCEV* CastedMaxBECount =
getTruncateOrZeroExtend(MaxBECount, Start->getType());
- SCEVHandle RecastedMaxBECount =
+ const SCEV* RecastedMaxBECount =
getTruncateOrZeroExtend(CastedMaxBECount, MaxBECount->getType());
if (MaxBECount == RecastedMaxBECount) {
const Type *WideTy =
IntegerType::get(getTypeSizeInBits(Start->getType()) * 2);
// Check whether Start+Step*MaxBECount has no unsigned overflow.
- SCEVHandle ZMul =
+ const SCEV* ZMul =
getMulExpr(CastedMaxBECount,
getTruncateOrZeroExtend(Step, Start->getType()));
- SCEVHandle Add = getAddExpr(Start, ZMul);
- SCEVHandle OperandExtendedAdd =
+ const SCEV* Add = getAddExpr(Start, ZMul);
+ const SCEV* OperandExtendedAdd =
getAddExpr(getZeroExtendExpr(Start, WideTy),
getMulExpr(getZeroExtendExpr(CastedMaxBECount, WideTy),
getZeroExtendExpr(Step, WideTy)));
@@ -815,7 +815,7 @@ SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op,
// Similar to above, only this time treat the step value as signed.
// This covers loops that count down.
- SCEVHandle SMul =
+ const SCEV* SMul =
getMulExpr(CastedMaxBECount,
getTruncateOrSignExtend(Step, Start->getType()));
Add = getAddExpr(Start, SMul);
@@ -837,7 +837,7 @@ SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op,
return Result;
}
-SCEVHandle ScalarEvolution::getSignExtendExpr(const SCEVHandle &Op,
+const SCEV* ScalarEvolution::getSignExtendExpr(const SCEV* Op,
const Type *Ty) {
assert(getTypeSizeInBits(Op->getType()) < getTypeSizeInBits(Ty) &&
"This is not an extending conversion!");
@@ -870,28 +870,28 @@ SCEVHandle ScalarEvolution::getSignExtendExpr(const SCEVHandle &Op,
// in infinite recursion. In the later case, the analysis code will
// cope with a conservative value, and it will take care to purge
// that value once it has finished.
- SCEVHandle MaxBECount = getMaxBackedgeTakenCount(AR->getLoop());
+ const SCEV* MaxBECount = getMaxBackedgeTakenCount(AR->getLoop());
if (!isa<SCEVCouldNotCompute>(MaxBECount)) {
// Manually compute the final value for AR, checking for
// overflow.
- SCEVHandle Start = AR->getStart();
- SCEVHandle Step = AR->getStepRecurrence(*this);
+ const SCEV* Start = AR->getStart();
+ const SCEV* Step = AR->getStepRecurrence(*this);
// Check whether the backedge-taken count can be losslessly casted to
// the addrec's type. The count is always unsigned.
- SCEVHandle CastedMaxBECount =
+ const SCEV* CastedMaxBECount =
getTruncateOrZeroExtend(MaxBECount, Start->getType());
- SCEVHandle RecastedMaxBECount =
+ const SCEV* RecastedMaxBECount =
getTruncateOrZeroExtend(CastedMaxBECount, MaxBECount->getType());
if (MaxBECount == RecastedMaxBECount) {
const Type *WideTy =
IntegerType::get(getTypeSizeInBits(Start->getType()) * 2);
// Check whether Start+Step*MaxBECount has no signed overflow.
- SCEVHandle SMul =
+ const SCEV* SMul =
getMulExpr(CastedMaxBECount,
getTruncateOrSignExtend(Step, Start->getType()));
- SCEVHandle Add = getAddExpr(Start, SMul);
- SCEVHandle OperandExtendedAdd =
+ const SCEV* Add = getAddExpr(Start, SMul);
+ const SCEV* OperandExtendedAdd =
getAddExpr(getSignExtendExpr(Start, WideTy),
getMulExpr(getZeroExtendExpr(CastedMaxBECount, WideTy),
getSignExtendExpr(Step, WideTy)));
@@ -912,7 +912,7 @@ SCEVHandle ScalarEvolution::getSignExtendExpr(const SCEVHandle &Op,
/// getAnyExtendExpr - Return a SCEV for the given operand extended with
/// unspecified bits out to the given type.
///
-SCEVHandle ScalarEvolution::getAnyExtendExpr(const SCEVHandle &Op,
+const SCEV* ScalarEvolution::getAnyExtendExpr(const SCEV* Op,
const Type *Ty) {
assert(getTypeSizeInBits(Op->getType()) < getTypeSizeInBits(Ty) &&
"This is not an extending conversion!");
@@ -927,19 +927,19 @@ SCEVHandle ScalarEvolution::getAnyExtendExpr(const SCEVHandle &Op,
// Peel off a truncate cast.
if (const SCEVTruncateExpr *T = dyn_cast<SCEVTruncateExpr>(Op)) {
- SCEVHandle NewOp = T->getOperand();
+ const SCEV* NewOp = T->getOperand();
if (getTypeSizeInBits(NewOp->getType()) < getTypeSizeInBits(Ty))
return getAnyExtendExpr(NewOp, Ty);
return getTruncateOrNoop(NewOp, Ty);
}
// Next try a zext cast. If the cast is folded, use it.
- SCEVHandle ZExt = getZeroExtendExpr(Op, Ty);
+ const SCEV* ZExt = getZeroExtendExpr(Op, Ty);
if (!isa<SCEVZeroExtendExpr>(ZExt))
return ZExt;
// Next try a sext cast. If the cast is folded, use it.
- SCEVHandle SExt = getSignExtendExpr(Op, Ty);
+ const SCEV* SExt = getSignExtendExpr(Op, Ty);
if (!isa<SCEVSignExtendExpr>(SExt))
return SExt;
@@ -977,10 +977,10 @@ SCEVHandle ScalarEvolution::getAnyExtendExpr(const SCEVHandle &Op,
/// is also used as a check to avoid infinite recursion.
///
static bool
-CollectAddOperandsWithScales(DenseMap<SCEVHandle, APInt> &M,
- SmallVector<SCEVHandle, 8> &NewOps,
+CollectAddOperandsWithScales(DenseMap<const SCEV*, APInt> &M,
+ SmallVector<const SCEV*, 8> &NewOps,
APInt &AccumulatedConstant,
- const SmallVectorImpl<SCEVHandle> &Ops,
+ const SmallVectorImpl<const SCEV*> &Ops,
const APInt &Scale,
ScalarEvolution &SE) {
bool Interesting = false;
@@ -1001,9 +1001,9 @@ CollectAddOperandsWithScales(DenseMap<SCEVHandle, APInt> &M,
} else {
// A multiplication of a constant with some other value. Update
// the map.
- SmallVector<SCEVHandle, 4> MulOps(Mul->op_begin()+1, Mul->op_end());
- SCEVHandle Key = SE.getMulExpr(MulOps);
- std::pair<DenseMap<SCEVHandle, APInt>::iterator, bool> Pair =
+ SmallVector<const SCEV*, 4> MulOps(Mul->op_begin()+1, Mul->op_end());
+ const SCEV* Key = SE.getMulExpr(MulOps);
+ std::pair<DenseMap<const SCEV*, APInt>::iterator, bool> Pair =
M.insert(std::make_pair(Key, APInt()));
if (Pair.second) {
Pair.first->second = NewScale;
@@ -1022,7 +1022,7 @@ CollectAddOperandsWithScales(DenseMap<SCEVHandle, APInt> &M,
AccumulatedConstant += Scale * C->getValue()->getValue();
} else {
// An ordinary operand. Update the map.
- std::pair<DenseMap<SCEVHandle, APInt>::iterator, bool> Pair =
+ std::pair<DenseMap<const SCEV*, APInt>::iterator, bool> Pair =
M.insert(std::make_pair(Ops[i], APInt()));
if (Pair.second) {
Pair.first->second = Scale;
@@ -1049,7 +1049,7 @@ namespace {
/// getAddExpr - Get a canonical add expression, or something simpler if
/// possible.
-SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
+const SCEV* ScalarEvolution::getAddExpr(SmallVectorImpl<const SCEV*> &Ops) {
assert(!Ops.empty() && "Cannot get empty add!");
if (Ops.size() == 1) return Ops[0];
#ifndef NDEBUG
@@ -1093,8 +1093,8 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
if (Ops[i] == Ops[i+1]) { // X + Y + Y --> X + Y*2
// Found a match, merge the two values into a multiply, and add any
// remaining values to the result.
- SCEVHandle Two = getIntegerSCEV(2, Ty);
- SCEVHandle Mul = getMulExpr(Ops[i], Two);
+ const SCEV* Two = getIntegerSCEV(2, Ty);
+ const SCEV* Mul = getMulExpr(Ops[i], Two);
if (Ops.size() == 2)
return Mul;
Ops.erase(Ops.begin()+i, Ops.begin()+i+2);
@@ -1110,7 +1110,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
const SCEVTruncateExpr *Trunc = cast<SCEVTruncateExpr>(Ops[Idx]);
const Type *DstType = Trunc->getType();
const Type *SrcType = Trunc->getOperand()->getType();
- SmallVector<SCEVHandle, 8> LargeOps;
+ SmallVector<const SCEV*, 8> LargeOps;
bool Ok = true;
// Check all the operands to see if they can be represented in the
// source type of the truncate.
@@ -1126,7 +1126,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
// is much more likely to be foldable here.
LargeOps.push_back(getSignExtendExpr(C, SrcType));
} else if (const SCEVMulExpr *M = dyn_cast<SCEVMulExpr>(Ops[i])) {
- SmallVector<SCEVHandle, 8> LargeMulOps;
+ SmallVector<const SCEV*, 8> LargeMulOps;
for (unsigned j = 0, f = M->getNumOperands(); j != f && Ok; ++j) {
if (const SCEVTruncateExpr *T =
dyn_cast<SCEVTruncateExpr>(M->getOperand(j))) {
@@ -1154,7 +1154,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
}
if (Ok) {
// Evaluate the expression in the larger type.
- SCEVHandle Fold = getAddExpr(LargeOps);
+ const SCEV* Fold = getAddExpr(LargeOps);
// If it folds to something simple, use it. Otherwise, don't.
if (isa<SCEVConstant>(Fold) || isa<SCEVUnknown>(Fold))
return getTruncateExpr(Fold, DstType);
@@ -1191,23 +1191,23 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
// operands multiplied by constant values.
if (Idx < Ops.size() && isa<SCEVMulExpr>(Ops[Idx])) {
uint64_t BitWidth = getTypeSizeInBits(Ty);
- DenseMap<SCEVHandle, APInt> M;
- SmallVector<SCEVHandle, 8> NewOps;
+ DenseMap<const SCEV*, APInt> M;
+ SmallVector<const SCEV*, 8> NewOps;
APInt AccumulatedConstant(BitWidth, 0);
if (CollectAddOperandsWithScales(M, NewOps, AccumulatedConstant,
Ops, APInt(BitWidth, 1), *this)) {
// Some interesting folding opportunity is present, so its worthwhile to
// re-generate the operands list. Group the operands by constant scale,
// to avoid multiplying by the same constant scale multiple times.
- std::map<APInt, SmallVector<SCEVHandle, 4>, APIntCompare> MulOpLists;
- for (SmallVector<SCEVHandle, 8>::iterator I = NewOps.begin(),
+ std::map<APInt, SmallVector<const SCEV*, 4>, APIntCompare> MulOpLists;
+ for (SmallVector<const SCEV*, 8>::iterator I = NewOps.begin(),
E = NewOps.end(); I != E; ++I)
MulOpLists[M.find(*I)->second].push_back(*I);
// Re-generate the operands list.
Ops.clear();
if (AccumulatedConstant != 0)
Ops.push_back(getConstant(AccumulatedConstant));
- for (std::map<APInt, SmallVector<SCEVHandle, 4>, APIntCompare>::iterator I =
+ for (std::map<APInt, SmallVector<const SCEV*, 4>, APIntCompare>::iterator I =
MulOpLists.begin(), E = MulOpLists.end(); I != E; ++I)
if (I->first != 0)
Ops.push_back(getMulExpr(getConstant(I->first), getAddExpr(I->second)));
@@ -1229,17 +1229,17 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
for (unsigned AddOp = 0, e = Ops.size(); AddOp != e; ++AddOp)
if (MulOpSCEV == Ops[AddOp] && !isa<SCEVConstant>(Ops[AddOp])) {
// Fold W + X + (X * Y * Z) --> W + (X * ((Y*Z)+1))
- SCEVHandle InnerMul = Mul->getOperand(MulOp == 0);
+ const SCEV* InnerMul = Mul->getOperand(MulOp == 0);
if (Mul->getNumOperands() != 2) {
// If the multiply has more than two operands, we must get the
// Y*Z term.
- SmallVector<SCEVHandle, 4> MulOps(Mul->op_begin(), Mul->op_end());
+ SmallVector<const SCEV*, 4> MulOps(Mul->op_begin(), Mul->op_end());
MulOps.erase(MulOps.begin()+MulOp);
InnerMul = getMulExpr(MulOps);
}
- SCEVHandle One = getIntegerSCEV(1, Ty);
- SCEVHandle AddOne = getAddExpr(InnerMul, One);
- SCEVHandle OuterMul = getMulExpr(AddOne, Ops[AddOp]);
+ const SCEV* One = getIntegerSCEV(1, Ty);
+ const SCEV* AddOne = getAddExpr(InnerMul, One);
+ const SCEV* OuterMul = getMulExpr(AddOne, Ops[AddOp]);
if (Ops.size() == 2) return OuterMul;
if (AddOp < Idx) {
Ops.erase(Ops.begin()+AddOp);
@@ -1263,21 +1263,21 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
OMulOp != e; ++OMulOp)
if (OtherMul->getOperand(OMulOp) == MulOpSCEV) {
// Fold X + (A*B*C) + (A*D*E) --> X + (A*(B*C+D*E))
- SCEVHandle InnerMul1 = Mul->getOperand(MulOp == 0);
+ const SCEV* InnerMul1 = Mul->getOperand(MulOp == 0);
if (Mul->getNumOperands() != 2) {
- SmallVector<SCEVHandle, 4> MulOps(Mul->op_begin(), Mul->op_end());
+ SmallVector<const SCEV*, 4> MulOps(Mul->op_begin(), Mul->op_end());
MulOps.erase(MulOps.begin()+MulOp);
InnerMul1 = getMulExpr(MulOps);
}
- SCEVHandle InnerMul2 = OtherMul->getOperand(OMulOp == 0);
+ const SCEV* InnerMul2 = OtherMul->getOperand(OMulOp == 0);
if (OtherMul->getNumOperands() != 2) {
- SmallVector<SCEVHandle, 4> MulOps(OtherMul->op_begin(),
+ SmallVector<const SCEV*, 4> MulOps(OtherMul->op_begin(),
OtherMul->op_end());
MulOps.erase(MulOps.begin()+OMulOp);
InnerMul2 = getMulExpr(MulOps);
}
- SCEVHandle InnerMulSum = getAddExpr(InnerMul1,InnerMul2);
- SCEVHandle OuterMul = getMulExpr(MulOpSCEV, InnerMulSum);
+ const SCEV* InnerMulSum = getAddExpr(InnerMul1,InnerMul2);
+ const SCEV* OuterMul = getMulExpr(MulOpSCEV, InnerMulSum);
if (Ops.size() == 2) return OuterMul;
Ops.erase(Ops.begin()+Idx);
Ops.erase(Ops.begin()+OtherMulIdx-1);
@@ -1298,7 +1298,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
for (; Idx < Ops.size() && isa<SCEVAddRecExpr>(Ops[Idx]); ++Idx) {
// Scan all of the other operands to this add and add them to the vector if
// they are loop invariant w.r.t. the recurrence.
- SmallVector<SCEVHandle, 8> LIOps;
+ SmallVector<const SCEV*, 8> LIOps;
const SCEVAddRecExpr *AddRec = cast<SCEVAddRecExpr>(Ops[Idx]);
for (unsigned i = 0, e = Ops.size(); i != e; ++i)
if (Ops[i]->isLoopInvariant(AddRec->getLoop())) {
@@ -1312,11 +1312,11 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
// NLI + LI + {Start,+,Step} --> NLI + {LI+Start,+,Step}
LIOps.push_back(AddRec->getStart());
- SmallVector<SCEVHandle, 4> AddRecOps(AddRec->op_begin(),
+ SmallVector<const SCEV*, 4> AddRecOps(AddRec->op_begin(),
AddRec->op_end());
AddRecOps[0] = getAddExpr(LIOps);
- SCEVHandle NewRec = getAddRecExpr(AddRecOps, AddRec->getLoop());
+ const SCEV* NewRec = getAddRecExpr(AddRecOps, AddRec->getLoop());
// If all of the other operands were loop invariant, we are done.
if (Ops.size() == 1) return NewRec;
@@ -1338,7 +1338,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
const SCEVAddRecExpr *OtherAddRec = cast<SCEVAddRecExpr>(Ops[OtherIdx]);
if (AddRec->getLoop() == OtherAddRec->getLoop()) {
// Other + {A,+,B} + {C,+,D} --> Other + {A+C,+,B+D}
- SmallVector<SCEVHandle, 4> NewOps(AddRec->op_begin(), AddRec->op_end());
+ SmallVector<const SCEV*, 4> NewOps(AddRec->op_begin(), AddRec->op_end());
for (unsigned i = 0, e = OtherAddRec->getNumOperands(); i != e; ++i) {
if (i >= NewOps.size()) {
NewOps.insert(NewOps.end(), OtherAddRec->op_begin()+i,
@@ -1347,7 +1347,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
}
NewOps[i] = getAddExpr(NewOps[i], OtherAddRec->getOperand(i));
}
- SCEVHandle NewAddRec = getAddRecExpr(NewOps, AddRec->getLoop());
+ const SCEV* NewAddRec = getAddRecExpr(NewOps, AddRec->getLoop());
if (Ops.size() == 2) return NewAddRec;
@@ -1374,7 +1374,7 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
/// getMulExpr - Get a canonical multiply expression, or something simpler if
/// possible.
-SCEVHandle ScalarEvolution::getMulExpr(SmallVectorImpl<SCEVHandle> &Ops) {
+const SCEV* ScalarEvolution::getMulExpr(SmallVectorImpl<const SCEV*> &Ops) {
assert(!Ops.empty() && "Cannot get empty mul!");
#ifndef NDEBUG
for (unsigned i = 1, e = Ops.size(); i != e; ++i)
@@ -1455,7 +1455,7 @@ SCEVHandle ScalarEvolution::getMulExpr(SmallVectorImpl<SCEVHandle> &Ops) {
for (; Idx < Ops.size() && isa<SCEVAddRecExpr>(Ops[Idx]); ++Idx) {
// Scan all of the other operands to this mul and add them to the vector if
// they are loop invariant w.r.t. the recurrence.
- SmallVector<SCEVHandle, 8> LIOps;
+ SmallVector<const SCEV*, 8> LIOps;
const SCEVAddRecExpr *AddRec = cast<SCEVAddRecExpr>(Ops[Idx]);
for (unsigned i = 0, e = Ops.size(); i != e; ++i)
if (Ops[i]->isLoopInvariant(AddRec->getLoop())) {
@@ -1467,7 +1467,7 @@ SCEVHandle ScalarEvolution::getMulExpr(SmallVectorImpl<SCEVHandle> &Ops) {
// If we found some loop invariants, fold them into the recurrence.
if (!LIOps.empty()) {
// NLI * LI * {Start,+,Step} --> NLI * {LI*Start,+,LI*Step}
- SmallVector<SCEVHandle, 4> NewOps;
+ SmallVector<const SCEV*, 4> NewOps;
NewOps.reserve(AddRec->getNumOperands());
if (LIOps.size() == 1) {
const SCEV *Scale = LIOps[0];
@@ -1475,13 +1475,13 @@ SCEVHandle ScalarEvolution::getMulExpr(SmallVectorImpl<SCEVHandle> &Ops) {
NewOps.push_back(getMulExpr(Scale, AddRec->getOperand(i)));
} else {
for (unsigned i = 0, e = AddRec->getNumOperands(); i != e; ++i) {
- SmallVector<SCEVHandle, 4> MulOps(LIOps.begin(), LIOps.end());
+ SmallVector<const SCEV*, 4> MulOps(LIOps.begin(), LIOps.end());
MulOps.push_back(AddRec->getOperand(i));
NewOps.push_back(getMulExpr(MulOps));
}
}
- SCEVHandle NewRec = getAddRecExpr(NewOps, AddRec->getLoop());
+ const SCEV* NewRec = getAddRecExpr(NewOps, AddRec->getLoop());
// If all of the other operands were loop invariant, we are done.
if (Ops.size() == 1) return NewRec;
@@ -1505,14 +1505,14 @@ SCEVHandle ScalarEvolution::getMulExpr(SmallVectorImpl<SCEVHandle> &Ops) {
if (AddRec->getLoop() == OtherAddRec->getLoop()) {
// F * G --> {A,+,B} * {C,+,D} --> {A*C,+,F*D + G*B + B*D}
const SCEVAddRecExpr *F = AddRec, *G = OtherAddRec;
- SCEVHandle NewStart = getMulExpr(F->getStart(),
+ const SCEV* NewStart = getMulExpr(F->getStart(),
G->getStart());
- SCEVHandle B = F->getStepRecurrence(*this);
- SCEVHandle D = G->getStepRecurrence(*this);
- SCEVHandle NewStep = getAddExpr(getMulExpr(F, D),
+ const SCEV* B = F->getStepRecurrence(*this);
+ const SCEV* D = G->getStepRecurrence(*this);
+ const SCEV* NewStep = getAddExpr(getMulExpr(F, D),
getMulExpr(G, B),
getMulExpr(B, D));
- SCEVHandle NewAddRec = getAddRecExpr(NewStart, NewStep,
+ const SCEV* NewAddRec = getAddRecExpr(NewStart, NewStep,
F->getLoop());
if (Ops.size() == 2) return NewAddRec;
@@ -1539,8 +1539,8 @@ SCEVHandle ScalarEvolution::getMulExpr(SmallVectorImpl<SCEVHandle> &Ops) {
/// getUDivExpr - Get a canonical multiply expression, or something simpler if
/// possible.
-SCEVHandle ScalarEvolution::getUDivExpr(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
+const SCEV* ScalarEvolution::getUDivExpr(const SCEV* LHS,
+ const SCEV* RHS) {
assert(getEffectiveSCEVType(LHS->getType()) ==
getEffectiveSCEVType(RHS->getType()) &&
"SCEVUDivExpr operand types don't match!");
@@ -1573,24 +1573,24 @@ SCEVHandle ScalarEvolution::getUDivExpr(const SCEVHandle &LHS,
getAddRecExpr(getZeroExtendExpr(AR->getStart(), ExtTy),
getZeroExtendExpr(Step, ExtTy),
AR->getLoop())) {
- SmallVector<SCEVHandle, 4> Operands;
+ SmallVector<const SCEV*, 4> Operands;
for (unsigned i = 0, e = AR->getNumOperands(); i != e; ++i)
Operands.push_back(getUDivExpr(AR->getOperand(i), RHS));
return getAddRecExpr(Operands, AR->getLoop());
}
// (A*B)/C --> A*(B/C) if safe and B/C can be folded.
if (const SCEVMulExpr *M = dyn_cast<SCEVMulExpr>(LHS)) {
- SmallVector<SCEVHandle, 4> Operands;
+ SmallVector<const SCEV*, 4> Operands;
for (unsigned i = 0, e = M->getNumOperands(); i != e; ++i)
Operands.push_back(getZeroExtendExpr(M->getOperand(i), ExtTy));
if (getZeroExtendExpr(M, ExtTy) == getMulExpr(Operands))
// Find an operand that's safely divisible.
for (unsigned i = 0, e = M->getNumOperands(); i != e; ++i) {
- SCEVHandle Op = M->getOperand(i);
- SCEVHandle Div = getUDivExpr(Op, RHSC);
+ const SCEV* Op = M->getOperand(i);
+ const SCEV* Div = getUDivExpr(Op, RHSC);
if (!isa<SCEVUDivExpr>(Div) && getMulExpr(Div, RHSC) == Op) {
- const SmallVectorImpl<SCEVHandle> &MOperands = M->getOperands();
- Operands = SmallVector<SCEVHandle, 4>(MOperands.begin(),
+ const SmallVectorImpl<const SCEV*> &MOperands = M->getOperands();
+ Operands = SmallVector<const SCEV*, 4>(MOperands.begin(),
MOperands.end());
Operands[i] = Div;
return getMulExpr(Operands);
@@ -1599,13 +1599,13 @@ SCEVHandle ScalarEvolution::getUDivExpr(const SCEVHandle &LHS,
}
// (A+B)/C --> (A/C + B/C) if safe and A/C and B/C can be folded.
if (const SCEVAddRecExpr *A = dyn_cast<SCEVAddRecExpr>(LHS)) {
- SmallVector<SCEVHandle, 4> Operands;
+ SmallVector<const SCEV*, 4> Operands;
for (unsigned i = 0, e = A->getNumOperands(); i != e; ++i)
Operands.push_back(getZeroExtendExpr(A->getOperand(i), ExtTy));
if (getZeroExtendExpr(A, ExtTy) == getAddExpr(Operands)) {
Operands.clear();
for (unsigned i = 0, e = A->getNumOperands(); i != e; ++i) {
- SCEVHandle Op = getUDivExpr(A->getOperand(i), RHS);
+ const SCEV* Op = getUDivExpr(A->getOperand(i), RHS);
if (isa<SCEVUDivExpr>(Op) || getMulExpr(Op, RHS) != A->getOperand(i))
break;
Operands.push_back(Op);
@@ -1631,9 +1631,9 @@ SCEVHandle ScalarEvolution::getUDivExpr(const SCEVHandle &LHS,
/// getAddRecExpr - Get an add recurrence expression for the specified loop.
/// Simplify the expression as much as possible.
-SCEVHandle ScalarEvolution::getAddRecExpr(const SCEVHandle &Start,
- const SCEVHandle &Step, const Loop *L) {
- SmallVector<SCEVHandle, 4> Operands;
+const SCEV* ScalarEvolution::getAddRecExpr(const SCEV* Start,
+ const SCEV* Step, const Loop *L) {
+ SmallVector<const SCEV*, 4> Operands;
Operands.push_back(Start);
if (const SCEVAddRecExpr *StepChrec = dyn_cast<SCEVAddRecExpr>(Step))
if (StepChrec->getLoop() == L) {
@@ -1648,7 +1648,7 @@ SCEVHandle ScalarEvolution::getAddRecExpr(const SCEVHandle &Start,
/// getAddRecExpr - Get an add recurrence expression for the specified loop.
/// Simplify the expression as much as possible.
-SCEVHandle ScalarEvolution::getAddRecExpr(SmallVectorImpl<SCEVHandle> &Operands,
+const SCEV* ScalarEvolution::getAddRecExpr(SmallVectorImpl<const SCEV*> &Operands,
const Loop *L) {
if (Operands.size() == 1) return Operands[0];
#ifndef NDEBUG
@@ -1667,9 +1667,8 @@ SCEVHandle ScalarEvolution::getAddRecExpr(SmallVectorImpl<SCEVHandle> &Operands,
if (const SCEVAddRecExpr *NestedAR = dyn_cast<SCEVAddRecExpr>(Operands[0])) {
const Loop* NestedLoop = NestedAR->getLoop();
if (L->getLoopDepth() < NestedLoop->getLoopDepth()) {
- SmallVector<SCEVHandle, 4> NestedOperands(NestedAR->op_begin(),
+ SmallVector<const SCEV*, 4> NestedOperands(NestedAR->op_begin(),
NestedAR->op_end());
- SCEVHandle NestedARHandle(NestedAR);
Operands[0] = NestedAR->getStart();
NestedOperands[0] = getAddRecExpr(Operands, L);
return getAddRecExpr(NestedOperands, NestedLoop);
@@ -1682,16 +1681,16 @@ SCEVHandle ScalarEvolution::getAddRecExpr(SmallVectorImpl<SCEVHandle> &Operands,
return Result;
}
-SCEVHandle ScalarEvolution::getSMaxExpr(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
- SmallVector<SCEVHandle, 2> Ops;
+const SCEV* ScalarEvolution::getSMaxExpr(const SCEV* LHS,
+ const SCEV* RHS) {
+ SmallVector<const SCEV*, 2> Ops;
Ops.push_back(LHS);
Ops.push_back(RHS);
return getSMaxExpr(Ops);
}
-SCEVHandle
-ScalarEvolution::getSMaxExpr(SmallVectorImpl<SCEVHandle> &Ops) {
+const SCEV*
+ScalarEvolution::getSMaxExpr(SmallVectorImpl<const SCEV*> &Ops) {
assert(!Ops.empty() && "Cannot get empty smax!");
if (Ops.size() == 1) return Ops[0];
#ifndef NDEBUG
@@ -1769,16 +1768,16 @@ ScalarEvolution::getSMaxExpr(SmallVectorImpl<SCEVHandle> &Ops) {
return Result;
}
-SCEVHandle ScalarEvolution::getUMaxExpr(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
- SmallVector<SCEVHandle, 2> Ops;
+const SCEV* ScalarEvolution::getUMaxExpr(const SCEV* LHS,
+ const SCEV* RHS) {
+ SmallVector<const SCEV*, 2> Ops;
Ops.push_back(LHS);
Ops.push_back(RHS);
return getUMaxExpr(Ops);
}
-SCEVHandle
-ScalarEvolution::getUMaxExpr(SmallVectorImpl<SCEVHandle> &Ops) {
+const SCEV*
+ScalarEvolution::getUMaxExpr(SmallVectorImpl<const SCEV*> &Ops) {
assert(!Ops.empty() && "Cannot get empty umax!");
if (Ops.size() == 1) return Ops[0];
#ifndef NDEBUG
@@ -1856,19 +1855,19 @@ ScalarEvolution::getUMaxExpr(SmallVectorImpl<SCEVHandle> &Ops) {
return Result;
}
-SCEVHandle ScalarEvolution::getSMinExpr(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
+const SCEV* ScalarEvolution::getSMinExpr(const SCEV* LHS,
+ const SCEV* RHS) {
// ~smax(~x, ~y) == smin(x, y).
return getNotSCEV(getSMaxExpr(getNotSCEV(LHS), getNotSCEV(RHS)));
}
-SCEVHandle ScalarEvolution::getUMinExpr(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
+const SCEV* ScalarEvolution::getUMinExpr(const SCEV* LHS,
+ const SCEV* RHS) {
// ~umax(~x, ~y) == umin(x, y)
return getNotSCEV(getUMaxExpr(getNotSCEV(LHS), getNotSCEV(RHS)));
}
-SCEVHandle ScalarEvolution::getUnknown(Value *V) {
+const SCEV* ScalarEvolution::getUnknown(Value *V) {
if (ConstantInt *CI = dyn_cast<ConstantInt>(V))
return getConstant(CI);
if (isa<ConstantPointerNull>(V))
@@ -1928,7 +1927,7 @@ const Type *ScalarEvolution::getEffectiveSCEVType(const Type *Ty) const {
return TD->getIntPtrType();
}
-SCEVHandle ScalarEvolution::getCouldNotCompute() {
+const SCEV* ScalarEvolution::getCouldNotCompute() {
return CouldNotCompute;
}
@@ -1940,19 +1939,19 @@ bool ScalarEvolution::hasSCEV(Value *V) const {
/// getSCEV - Return an existing SCEV if it exists, otherwise analyze the
/// expression and create a new one.
-SCEVHandle ScalarEvolution::getSCEV(Value *V) {
+const SCEV* ScalarEvolution::getSCEV(Value *V) {
assert(isSCEVable(V->getType()) && "Value is not SCEVable!");
- std::map<SCEVCallbackVH, SCEVHandle>::iterator I = Scalars.find(V);
+ std::map<SCEVCallbackVH, const SCEV*>::iterator I = Scalars.find(V);
if (I != Scalars.end()) return I->second;
- SCEVHandle S = createSCEV(V);
+ const SCEV* S = createSCEV(V);
Scalars.insert(std::make_pair(SCEVCallbackVH(V, this), S));
return S;
}
/// getIntegerSCEV - Given an integer or FP type, create a constant for the
/// specified signed integer value and return a SCEV for the constant.
-SCEVHandle ScalarEvolution::getIntegerSCEV(int Val, const Type *Ty) {
+const SCEV* ScalarEvolution::getIntegerSCEV(int Val, const Type *Ty) {
Ty = getEffectiveSCEVType(Ty);
Constant *C;
if (Val == 0)
@@ -1967,7 +1966,7 @@ SCEVHandle ScalarEvolution::getIntegerSCEV(int Val, const Type *Ty) {
/// getNegativeSCEV - Return a SCEV corresponding to -V = -1*V
///
-SCEVHandle ScalarEvolution::getNegativeSCEV(const SCEVHandle &V) {
+const SCEV* ScalarEvolution::getNegativeSCEV(const SCEV* V) {
if (const SCEVConstant *VC = dyn_cast<SCEVConstant>(V))
return getUnknown(ConstantExpr::getNeg(VC->getValue()));
@@ -1977,20 +1976,20 @@ SCEVHandle ScalarEvolution::getNegativeSCEV(const SCEVHandle &V) {
}
/// getNotSCEV - Return a SCEV corresponding to ~V = -1-V
-SCEVHandle ScalarEvolution::getNotSCEV(const SCEVHandle &V) {
+const SCEV* ScalarEvolution::getNotSCEV(const SCEV* V) {
if (const SCEVConstant *VC = dyn_cast<SCEVConstant>(V))
return getUnknown(ConstantExpr::getNot(VC->getValue()));
const Type *Ty = V->getType();
Ty = getEffectiveSCEVType(Ty);
- SCEVHandle AllOnes = getConstant(ConstantInt::getAllOnesValue(Ty));
+ const SCEV* AllOnes = getConstant(ConstantInt::getAllOnesValue(Ty));
return getMinusSCEV(AllOnes, V);
}
/// getMinusSCEV - Return a SCEV corresponding to LHS - RHS.
///
-SCEVHandle ScalarEvolution::getMinusSCEV(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
+const SCEV* ScalarEvolution::getMinusSCEV(const SCEV* LHS,
+ const SCEV* RHS) {
// X - Y --> X + -Y
return getAddExpr(LHS, getNegativeSCEV(RHS));
}
@@ -1998,8 +1997,8 @@ SCEVHandle ScalarEvolution::getMinusSCEV(const SCEVHandle &LHS,
/// getTruncateOrZeroExtend - Return a SCEV corresponding to a conversion of the
/// input value to the specified type. If the type must be extended, it is zero
/// extended.
-SCEVHandle
-ScalarEvolution::getTruncateOrZeroExtend(const SCEVHandle &V,
+const SCEV*
+ScalarEvolution::getTruncateOrZeroExtend(const SCEV* V,
const Type *Ty) {
const Type *SrcTy = V->getType();
assert((SrcTy->isInteger() || (TD && isa<PointerType>(SrcTy))) &&
@@ -2015,8 +2014,8 @@ ScalarEvolution::getTruncateOrZeroExtend(const SCEVHandle &V,
/// getTruncateOrSignExtend - Return a SCEV corresponding to a conversion of the
/// input value to the specified type. If the type must be extended, it is sign
/// extended.
-SCEVHandle
-ScalarEvolution::getTruncateOrSignExtend(const SCEVHandle &V,
+const SCEV*
+ScalarEvolution::getTruncateOrSignExtend(const SCEV* V,
const Type *Ty) {
const Type *SrcTy = V->getType();
assert((SrcTy->isInteger() || (TD && isa<PointerType>(SrcTy))) &&
@@ -2032,8 +2031,8 @@ ScalarEvolution::getTruncateOrSignExtend(const SCEVHandle &V,
/// getNoopOrZeroExtend - Return a SCEV corresponding to a conversion of the
/// input value to the specified type. If the type must be extended, it is zero
/// extended. The conversion must not be narrowing.
-SCEVHandle
-ScalarEvolution::getNoopOrZeroExtend(const SCEVHandle &V, const Type *Ty) {
+const SCEV*
+ScalarEvolution::getNoopOrZeroExtend(const SCEV* V, const Type *Ty) {
const Type *SrcTy = V->getType();
assert((SrcTy->isInteger() || (TD && isa<PointerType>(SrcTy))) &&
(Ty->isInteger() || (TD && isa<PointerType>(Ty))) &&
@@ -2048,8 +2047,8 @@ ScalarEvolution::getNoopOrZeroExtend(const SCEVHandle &V, const Type *Ty) {
/// getNoopOrSignExtend - Return a SCEV corresponding to a conversion of the
/// input value to the specified type. If the type must be extended, it is sign
/// extended. The conversion must not be narrowing.
-SCEVHandle
-ScalarEvolution::getNoopOrSignExtend(const SCEVHandle &V, const Type *Ty) {
+const SCEV*
+ScalarEvolution::getNoopOrSignExtend(const SCEV* V, const Type *Ty) {
const Type *SrcTy = V->getType();
assert((SrcTy->isInteger() || (TD && isa<PointerType>(SrcTy))) &&
(Ty->isInteger() || (TD && isa<PointerType>(Ty))) &&
@@ -2065,8 +2064,8 @@ ScalarEvolution::getNoopOrSignExtend(const SCEVHandle &V, const Type *Ty) {
/// the input value to the specified type. If the type must be extended,
/// it is extended with unspecified bits. The conversion must not be
/// narrowing.
-SCEVHandle
-ScalarEvolution::getNoopOrAnyExtend(const SCEVHandle &V, const Type *Ty) {
+const SCEV*
+ScalarEvolution::getNoopOrAnyExtend(const SCEV* V, const Type *Ty) {
const Type *SrcTy = V->getType();
assert((SrcTy->isInteger() || (TD && isa<PointerType>(SrcTy))) &&
(Ty->isInteger() || (TD && isa<PointerType>(Ty))) &&
@@ -2080,8 +2079,8 @@ ScalarEvolution::getNoopOrAnyExtend(const SCEVHandle &V, const Type *Ty) {
/// getTruncateOrNoop - Return a SCEV corresponding to a conversion of the
/// input value to the specified type. The conversion must not be widening.
-SCEVHandle
-ScalarEvolution::getTruncateOrNoop(const SCEVHandle &V, const Type *Ty) {
+const SCEV*
+ScalarEvolution::getTruncateOrNoop(const SCEV* V, const Type *Ty) {
const Type *SrcTy = V->getType();
assert((SrcTy->isInteger() || (TD && isa<PointerType>(SrcTy))) &&
(Ty->isInteger() || (TD && isa<PointerType>(Ty))) &&
@@ -2096,10 +2095,10 @@ ScalarEvolution::getTruncateOrNoop(const SCEVHandle &V, const Type *Ty) {
/// getUMaxFromMismatchedTypes - Promote the operands to the wider of
/// the types using zero-extension, and then perform a umax operation
/// with them.
-SCEVHandle ScalarEvolution::getUMaxFromMismatchedTypes(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
- SCEVHandle PromotedLHS = LHS;
- SCEVHandle PromotedRHS = RHS;
+const SCEV* ScalarEvolution::getUMaxFromMismatchedTypes(const SCEV* LHS,
+ const SCEV* RHS) {
+ const SCEV* PromotedLHS = LHS;
+ const SCEV* PromotedRHS = RHS;
if (getTypeSizeInBits(LHS->getType()) > getTypeSizeInBits(RHS->getType()))
PromotedRHS = getZeroExtendExpr(RHS, LHS->getType());
@@ -2112,10 +2111,10 @@ SCEVHandle ScalarEvolution::getUMaxFromMismatchedTypes(const SCEVHandle &LHS,
/// getUMinFromMismatchedTypes - Promote the operands to the wider of
/// the types using zero-extension, and then perform a umin operation
/// with them.
-SCEVHandle ScalarEvolution::getUMinFromMismatchedTypes(const SCEVHandle &LHS,
- const SCEVHandle &RHS) {
- SCEVHandle PromotedLHS = LHS;
- SCEVHandle PromotedRHS = RHS;
+const SCEV* ScalarEvolution::getUMinFromMismatchedTypes(const SCEV* LHS,
+ const SCEV* RHS) {
+ const SCEV* PromotedLHS = LHS;
+ const SCEV* PromotedRHS = RHS;
if (getTypeSizeInBits(LHS->getType()) > getTypeSizeInBits(RHS->getType()))
PromotedRHS = getZeroExtendExpr(RHS, LHS->getType());
@@ -2129,13 +2128,13 @@ SCEVHandle ScalarEvolution::getUMinFromMismatchedTypes(const SCEVHandle &LHS,
/// the specified instruction and replaces any references to the symbolic value
/// SymName with the specified value. This is used during PHI resolution.
void ScalarEvolution::
-ReplaceSymbolicValueWithConcrete(Instruction *I, const SCEVHandle &SymName,
- const SCEVHandle &NewVal) {
- std::map<SCEVCallbackVH, SCEVHandle>::iterator SI =
+ReplaceSymbolicValueWithConcrete(Instruction *I, const SCEV* SymName,
+ const SCEV* NewVal) {
+ std::map<SCEVCallbackVH, const SCEV*>::iterator SI =
Scalars.find(SCEVCallbackVH(I, this));
if (SI == Scalars.end()) return;
- SCEVHandle NV =
+ const SCEV* NV =
SI->second->replaceSymbolicValuesWithConcrete(SymName, NewVal, *this);
if (NV == SI->second) return; // No change.
@@ -2151,7 +2150,7 @@ ReplaceSymbolicValueWithConcrete(Instruction *I, const SCEVHandle &SymName,
/// createNodeForPHI - PHI nodes have two cases. Either the PHI node exists in
/// a loop header, making it a potential recurrence, or it doesn't.
///
-SCEVHandle ScalarEvolution::createNodeForPHI(PHINode *PN) {
+const SCEV* ScalarEvolution::createNodeForPHI(PHINode *PN) {
if (PN->getNumIncomingValues() == 2) // The loops have been canonicalized.
if (const Loop *L = LI->getLoopFor(PN->getParent()))
if (L->getHeader() == PN->getParent()) {
@@ -2161,14 +2160,14 @@ SCEVHandle ScalarEvolution::createNodeForPHI(PHINode *PN) {
unsigned BackEdge = IncomingEdge^1;
// While we are analyzing this PHI node, handle its value symbolically.
- SCEVHandle SymbolicName = getUnknown(PN);
+ const SCEV* SymbolicName = getUnknown(PN);
assert(Scalars.find(PN) == Scalars.end() &&
"PHI node already processed?");
Scalars.insert(std::make_pair(SCEVCallbackVH(PN, this), SymbolicName));
// Using this symbolic name for the PHI, analyze the value coming around
// the back-edge.
- SCEVHandle BEValue = getSCEV(PN->getIncomingValue(BackEdge));
+ const SCEV* BEValue = getSCEV(PN->getIncomingValue(BackEdge));
// NOTE: If BEValue is loop invariant, we know that the PHI node just
// has a special value for the first iteration of the loop.
@@ -2188,19 +2187,19 @@ SCEVHandle ScalarEvolution::createNodeForPHI(PHINode *PN) {
if (FoundIndex != Add->getNumOperands()) {
// Create an add with everything but the specified operand.
- SmallVector<SCEVHandle, 8> Ops;
+ SmallVector<const SCEV*, 8> Ops;
for (unsigned i = 0, e = Add->getNumOperands(); i != e; ++i)
if (i != FoundIndex)
Ops.push_back(Add->getOperand(i));
- SCEVHandle Accum = getAddExpr(Ops);
+ const SCEV* Accum = getAddExpr(Ops);
// This is not a valid addrec if the step amount is varying each
// loop iteration, but is not itself an addrec in this loop.
if (Accum->isLoopInvariant(L) ||
(isa<SCEVAddRecExpr>(Accum) &&
cast<SCEVAddRecExpr>(Accum)->getLoop() == L)) {
- SCEVHandle StartVal = getSCEV(PN->getIncomingValue(IncomingEdge));
- SCEVHandle PHISCEV = getAddRecExpr(StartVal, Accum, L);
+ const SCEV* StartVal = getSCEV(PN->getIncomingValue(IncomingEdge));
+ const SCEV* PHISCEV = getAddRecExpr(StartVal, Accum, L);
// Okay, for the entire analysis of this edge we assumed the PHI
// to be symbolic. We now need to go back and update all of the
@@ -2219,13 +2218,13 @@ SCEVHandle ScalarEvolution::createNodeForPHI(PHINode *PN) {
// Because the other in-value of i (0) fits the evolution of BEValue
// i really is an addrec evolution.
if (AddRec->getLoop() == L && AddRec->isAffine()) {
- SCEVHandle StartVal = getSCEV(PN->getIncomingValue(IncomingEdge));
+ const SCEV* StartVal = getSCEV(PN->getIncomingValue(IncomingEdge));
// If StartVal = j.start - j.stride, we can use StartVal as the
// initial step of the addrec evolution.
if (StartVal == getMinusSCEV(AddRec->getOperand(0),
AddRec->getOperand(1))) {
- SCEVHandle PHISCEV =
+ const SCEV* PHISCEV =
getAddRecExpr(StartVal, AddRec->getOperand(1), L);
// Okay, for the entire analysis of this edge we assumed the PHI
@@ -2249,14 +2248,14 @@ SCEVHandle ScalarEvolution::createNodeForPHI(PHINode *PN) {
/// createNodeForGEP - Expand GEP instructions into add and multiply
/// operations. This allows them to be analyzed by regular SCEV code.
///
-SCEVHandle ScalarEvolution::createNodeForGEP(User *GEP) {
+const SCEV* ScalarEvolution::createNodeForGEP(User *GEP) {
const Type *IntPtrTy = TD->getIntPtrType();
Value *Base = GEP->getOperand(0);
// Don't attempt to analyze GEPs over unsized objects.
if (!cast<PointerType>(Base->getType())->getElementType()->isSized())
return getUnknown(GEP);
- SCEVHandle TotalOffset = getIntegerSCEV(0, IntPtrTy);
+ const SCEV* TotalOffset = getIntegerSCEV(0, IntPtrTy);
gep_type_iterator GTI = gep_type_begin(GEP);
for (GetElementPtrInst::op_iterator I = next(GEP->op_begin()),
E = GEP->op_end();
@@ -2272,7 +2271,7 @@ SCEVHandle ScalarEvolution::createNodeForGEP(User *GEP) {
getIntegerSCEV(Offset, IntPtrTy));
} else {
// For an array, add the element offset, explicitly scaled.
- SCEVHandle LocalOffset = getSCEV(Index);
+ const SCEV* LocalOffset = getSCEV(Index);
if (!isa<PointerType>(LocalOffset->getType()))
// Getelementptr indicies are signed.
LocalOffset = getTruncateOrSignExtend(LocalOffset,
@@ -2292,7 +2291,7 @@ SCEVHandle ScalarEvolution::createNodeForGEP(User *GEP) {
/// the minimum number of times S is divisible by 2. For example, given {4,+,8}
/// it returns 2. If S is guaranteed to be 0, it returns the bitwidth of S.
uint32_t
-ScalarEvolution::GetMinTrailingZeros(const SCEVHandle &S) {
+ScalarEvolution::GetMinTrailingZeros(const SCEV* S) {
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(S))
return C->getValue()->getValue().countTrailingZeros();
@@ -2369,7 +2368,7 @@ ScalarEvolution::GetMinTrailingZeros(const SCEVHandle &S) {
}
uint32_t
-ScalarEvolution::GetMinLeadingZeros(const SCEVHandle &S) {
+ScalarEvolution::GetMinLeadingZeros(const SCEV* S) {
// TODO: Handle other SCEV expression types here.
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(S))
@@ -2395,7 +2394,7 @@ ScalarEvolution::GetMinLeadingZeros(const SCEVHandle &S) {
}
uint32_t
-ScalarEvolution::GetMinSignBits(const SCEVHandle &S) {
+ScalarEvolution::GetMinSignBits(const SCEV* S) {
// TODO: Handle other SCEV expression types here.
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(S)) {
@@ -2422,7 +2421,7 @@ ScalarEvolution::GetMinSignBits(const SCEVHandle &S) {
/// createSCEV - We know that there is no SCEV for the specified value.
/// Analyze the expression.
///
-SCEVHandle ScalarEvolution::createSCEV(Value *V) {
+const SCEV* ScalarEvolution::createSCEV(Value *V) {
if (!isSCEVable(V->getType()))
return getUnknown(V);
@@ -2486,7 +2485,7 @@ SCEVHandle ScalarEvolution::createSCEV(Value *V) {
// In order for this transformation to be safe, the LHS must be of the
// form X*(2^n) and the Or constant must be less than 2^n.
if (ConstantInt *CI = dyn_cast<ConstantInt>(U->getOperand(1))) {
- SCEVHandle LHS = getSCEV(U->getOperand(0));
+ const SCEV* LHS = getSCEV(U->getOperand(0));
const APInt &CIVal = CI->getValue();
if (GetMinTrailingZeros(LHS) >=
(CIVal.getBitWidth() - CIVal.countLeadingZeros()))
@@ -2516,7 +2515,7 @@ SCEVHandle ScalarEvolution::createSCEV(Value *V) {
if (const SCEVZeroExtendExpr *Z =
dyn_cast<SCEVZeroExtendExpr>(getSCEV(U->getOperand(0)))) {
const Type *UTy = U->getType();
- SCEVHandle Z0 = Z->getOperand();
+ const SCEV* Z0 = Z->getOperand();
const Type *Z0Ty = Z0->getType();
unsigned Z0TySize = getTypeSizeInBits(Z0Ty);
@@ -2685,14 +2684,14 @@ SCEVHandle ScalarEvolution::createSCEV(Value *V) {
/// loop-invariant backedge-taken count (see
/// hasLoopInvariantBackedgeTakenCount).
///
-SCEVHandle ScalarEvolution::getBackedgeTakenCount(const Loop *L) {
+const SCEV* ScalarEvolution::getBackedgeTakenCount(const Loop *L) {
return getBackedgeTakenInfo(L).Exact;
}
/// getMaxBackedgeTakenCount - Similar to getBackedgeTakenCount, except
/// return the least SCEV value that is known never to be less than the
/// actual backedge taken count.
-SCEVHandle ScalarEvolution::getMaxBackedgeTakenCount(const Loop *L) {
+const SCEV* ScalarEvolution::getMaxBackedgeTakenCount(const Loop *L) {
return getBackedgeTakenInfo(L).Max;
}
@@ -2759,7 +2758,7 @@ void ScalarEvolution::forgetLoopPHIs(const Loop *L) {
SmallVector<Instruction *, 16> Worklist;
for (BasicBlock::iterator I = Header->begin();
PHINode *PN = dyn_cast<PHINode>(I); ++I) {
- std::map<SCEVCallbackVH, SCEVHandle>::iterator It = Scalars.find((Value*)I);
+ std::map<SCEVCallbackVH, const SCEV*>::iterator It = Scalars.find((Value*)I);
if (It != Scalars.end() && !isa<SCEVUnknown>(It->second))
Worklist.push_back(PN);
}
@@ -2781,8 +2780,8 @@ ScalarEvolution::ComputeBackedgeTakenCount(const Loop *L) {
L->getExitingBlocks(ExitingBlocks);
// Examine all exits and pick the most conservative values.
- SCEVHandle BECount = CouldNotCompute;
- SCEVHandle MaxBECount = CouldNotCompute;
+ const SCEV* BECount = CouldNotCompute;
+ const SCEV* MaxBECount = CouldNotCompute;
bool CouldNotComputeBECount = false;
bool CouldNotComputeMaxBECount = false;
for (unsigned i = 0, e = ExitingBlocks.size(); i != e; ++i) {
@@ -2906,8 +2905,8 @@ ScalarEvolution::ComputeBackedgeTakenCountFromExitCond(const Loop *L,
ComputeBackedgeTakenCountFromExitCond(L, BO->getOperand(0), TBB, FBB);
BackedgeTakenInfo BTI1 =
ComputeBackedgeTakenCountFromExitCond(L, BO->getOperand(1), TBB, FBB);
- SCEVHandle BECount = CouldNotCompute;
- SCEVHandle MaxBECount = CouldNotCompute;
+ const SCEV* BECount = CouldNotCompute;
+ const SCEV* MaxBECount = CouldNotCompute;
if (L->contains(TBB)) {
// Both conditions must be true for the loop to continue executing.
// Choose the less conservative count.
@@ -2940,8 +2939,8 @@ ScalarEvolution::ComputeBackedgeTakenCountFromExitCond(const Loop *L,
ComputeBackedgeTakenCountFromExitCond(L, BO->getOperand(0), TBB, FBB);
BackedgeTakenInfo BTI1 =
ComputeBackedgeTakenCountFromExitCond(L, BO->getOperand(1), TBB, FBB);
- SCEVHandle BECount = CouldNotCompute;
- SCEVHandle MaxBECount = CouldNotCompute;
+ const SCEV* BECount = CouldNotCompute;
+ const SCEV* MaxBECount = CouldNotCompute;
if (L->contains(FBB)) {
// Both conditions must be false for the loop to continue executing.
// Choose the less conservative count.
@@ -2998,7 +2997,7 @@ ScalarEvolution::ComputeBackedgeTakenCountFromExitCondICmp(const Loop *L,
// Handle common loops like: for (X = "string"; *X; ++X)
if (LoadInst *LI = dyn_cast<LoadInst>(ExitCond->getOperand(0)))
if (Constant *RHS = dyn_cast<Constant>(ExitCond->getOperand(1))) {
- SCEVHandle ItCnt =
+ const SCEV* ItCnt =
ComputeLoadConstantCompareBackedgeTakenCount(LI, RHS, L, Cond);
if (!isa<SCEVCouldNotCompute>(ItCnt)) {
unsigned BitWidth = getTypeSizeInBits(ItCnt->getType());
@@ -3008,8 +3007,8 @@ ScalarEvolution::ComputeBackedgeTakenCountFromExitCondICmp(const Loop *L,
}
}
- SCEVHandle LHS = getSCEV(ExitCond->getOperand(0));
- SCEVHandle RHS = getSCEV(ExitCond->getOperand(1));
+ const SCEV* LHS = getSCEV(ExitCond->getOperand(0));
+ const SCEV* RHS = getSCEV(ExitCond->getOperand(1));
// Try to evaluate any dependencies out of the loop.
LHS = getSCEVAtScope(LHS, L);
@@ -3032,20 +3031,20 @@ ScalarEvolution::ComputeBackedgeTakenCountFromExitCondICmp(const Loop *L,
ConstantRange CompRange(
ICmpInst::makeConstantRange(Cond, RHSC->getValue()->getValue()));
- SCEVHandle Ret = AddRec->getNumIterationsInRange(CompRange, *this);
+ const SCEV* Ret = AddRec->getNumIterationsInRange(CompRange, *this);
if (!isa<SCEVCouldNotCompute>(Ret)) return Ret;
}
switch (Cond) {
case ICmpInst::ICMP_NE: { // while (X != Y)
// Convert to: while (X-Y != 0)
- SCEVHandle TC = HowFarToZero(getMinusSCEV(LHS, RHS), L);
+ const SCEV* TC = HowFarToZero(getMinusSCEV(LHS, RHS), L);
if (!isa<SCEVCouldNotCompute>(TC)) return TC;
break;
}
case ICmpInst::ICMP_EQ: {
// Convert to: while (X-Y == 0) // while (X == Y)
- SCEVHandle TC = HowFarToNonZero(getMinusSCEV(LHS, RHS), L);
+ const SCEV* TC = HowFarToNonZero(getMinusSCEV(LHS, RHS), L);
if (!isa<SCEVCouldNotCompute>(TC)) return TC;
break;
}
@@ -3089,8 +3088,8 @@ ScalarEvolution::ComputeBackedgeTakenCountFromExitCondICmp(const Loop *L,
static ConstantInt *
EvaluateConstantChrecAtConstant(const SCEVAddRecExpr *AddRec, ConstantInt *C,
ScalarEvolution &SE) {
- SCEVHandle InVal = SE.getConstant(C);
- SCEVHandle Val = AddRec->evaluateAtIteration(InVal, SE);
+ const SCEV* InVal = SE.getConstant(C);
+ const SCEV* Val = AddRec->evaluateAtIteration(InVal, SE);
assert(isa<SCEVConstant>(Val) &&
"Evaluation of SCEV at constant didn't fold correctly?");
return cast<SCEVConstant>(Val)->getValue();
@@ -3133,7 +3132,7 @@ GetAddressedElementFromGlobal(GlobalVariable *GV,
/// ComputeLoadConstantCompareBackedgeTakenCount - Given an exit condition of
/// 'icmp op load X, cst', try to see if we can compute the backedge
/// execution count.
-SCEVHandle ScalarEvolution::
+const SCEV* ScalarEvolution::
ComputeLoadConstantCompareBackedgeTakenCount(LoadInst *LI, Constant *RHS,
const Loop *L,
ICmpInst::Predicate predicate) {
@@ -3167,7 +3166,7 @@ ComputeLoadConstantCompareBackedgeTakenCount(LoadInst *LI, Constant *RHS,
// Okay, we know we have a (load (gep GV, 0, X)) comparison with a constant.
// Check to see if X is a loop variant variable value now.
- SCEVHandle Idx = getSCEV(VarIdx);
+ const SCEV* Idx = getSCEV(VarIdx);
Idx = getSCEVAtScope(Idx, L);
// We can only recognize very limited forms of loop index expressions, in
@@ -3343,7 +3342,7 @@ getConstantEvolutionLoopExitValue(PHINode *PN, const APInt& BEs, const Loop *L){
/// try to evaluate a few iterations of the loop until we get the exit
/// condition gets a value of ExitWhen (true or false). If we cannot
/// evaluate the trip count of the loop, return CouldNotCompute.
-SCEVHandle ScalarEvolution::
+const SCEV* ScalarEvolution::
ComputeBackedgeTakenCountExhaustively(const Loop *L, Value *Cond, bool ExitWhen) {
PHINode *PN = getConstantEvolvingPHI(Cond, L);
if (PN == 0) return CouldNotCompute;
@@ -3400,7 +3399,7 @@ ComputeBackedgeTakenCountExhaustively(const Loop *L, Value *Cond, bool ExitWhen)
///
/// In the case that a relevant loop exit value cannot be computed, the
/// original value V is returned.
-SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
+const SCEV* ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
// FIXME: this should be turned into a virtual method on SCEV!
if (isa<SCEVConstant>(V)) return V;
@@ -3417,7 +3416,7 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
// to see if the loop that contains it has a known backedge-taken
// count. If so, we may be able to force computation of the exit
// value.
- SCEVHandle BackedgeTakenCount = getBackedgeTakenCount(LI);
+ const SCEV* BackedgeTakenCount = getBackedgeTakenCount(LI);
if (const SCEVConstant *BTCC =
dyn_cast<SCEVConstant>(BackedgeTakenCount)) {
// Okay, we know how many times the containing loop executes. If
@@ -3455,7 +3454,7 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
if (!isSCEVable(Op->getType()))
return V;
- SCEVHandle OpV = getSCEVAtScope(getSCEV(Op), L);
+ const SCEV* OpV = getSCEVAtScope(getSCEV(Op), L);
if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(OpV)) {
Constant *C = SC->getValue();
if (C->getType() != Op->getType())
@@ -3501,11 +3500,11 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
// Avoid performing the look-up in the common case where the specified
// expression has no loop-variant portions.
for (unsigned i = 0, e = Comm->getNumOperands(); i != e; ++i) {
- SCEVHandle OpAtScope = getSCEVAtScope(Comm->getOperand(i), L);
+ const SCEV* OpAtScope = getSCEVAtScope(Comm->getOperand(i), L);
if (OpAtScope != Comm->getOperand(i)) {
// Okay, at least one of these operands is loop variant but might be
// foldable. Build a new instance of the folded commutative expression.
- SmallVector<SCEVHandle, 8> NewOps(Comm->op_begin(), Comm->op_begin()+i);
+ SmallVector<const SCEV*, 8> NewOps(Comm->op_begin(), Comm->op_begin()+i);
NewOps.push_back(OpAtScope);
for (++i; i != e; ++i) {
@@ -3528,8 +3527,8 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
}
if (const SCEVUDivExpr *Div = dyn_cast<SCEVUDivExpr>(V)) {
- SCEVHandle LHS = getSCEVAtScope(Div->getLHS(), L);
- SCEVHandle RHS = getSCEVAtScope(Div->getRHS(), L);
+ const SCEV* LHS = getSCEVAtScope(Div->getLHS(), L);
+ const SCEV* RHS = getSCEVAtScope(Div->getRHS(), L);
if (LHS == Div->getLHS() && RHS == Div->getRHS())
return Div; // must be loop invariant
return getUDivExpr(LHS, RHS);
@@ -3541,7 +3540,7 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
if (!L || !AddRec->getLoop()->contains(L->getHeader())) {
// To evaluate this recurrence, we need to know how many times the AddRec
// loop iterates. Compute this now.
- SCEVHandle BackedgeTakenCount = getBackedgeTakenCount(AddRec->getLoop());
+ const SCEV* BackedgeTakenCount = getBackedgeTakenCount(AddRec->getLoop());
if (BackedgeTakenCount == CouldNotCompute) return AddRec;
// Then, evaluate the AddRec.
@@ -3551,21 +3550,21 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
}
if (const SCEVZeroExtendExpr *Cast = dyn_cast<SCEVZeroExtendExpr>(V)) {
- SCEVHandle Op = getSCEVAtScope(Cast->getOperand(), L);
+ const SCEV* Op = getSCEVAtScope(Cast->getOperand(), L);
if (Op == Cast->getOperand())
return Cast; // must be loop invariant
return getZeroExtendExpr(Op, Cast->getType());
}
if (const SCEVSignExtendExpr *Cast = dyn_cast<SCEVSignExtendExpr>(V)) {
- SCEVHandle Op = getSCEVAtScope(Cast->getOperand(), L);
+ const SCEV* Op = getSCEVAtScope(Cast->getOperand(), L);
if (Op == Cast->getOperand())
return Cast; // must be loop invariant
return getSignExtendExpr(Op, Cast->getType());
}
if (const SCEVTruncateExpr *Cast = dyn_cast<SCEVTruncateExpr>(V)) {
- SCEVHandle Op = getSCEVAtScope(Cast->getOperand(), L);
+ const SCEV* Op = getSCEVAtScope(Cast->getOperand(), L);
if (Op == Cast->getOperand())
return Cast; // must be loop invariant
return getTruncateExpr(Op, Cast->getType());
@@ -3577,7 +3576,7 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(const SCEV *V, const Loop *L) {
/// getSCEVAtScope - This is a convenience function which does
/// getSCEVAtScope(getSCEV(V), L).
-SCEVHandle ScalarEvolution::getSCEVAtScope(Value *V, const Loop *L) {
+const SCEV* ScalarEvolution::getSCEVAtScope(Value *V, const Loop *L) {
return getSCEVAtScope(getSCEV(V), L);
}
@@ -3590,7 +3589,7 @@ SCEVHandle ScalarEvolution::getSCEVAtScope(Value *V, const Loop *L) {
/// A and B isn't important.
///
/// If the equation does not have a solution, SCEVCouldNotCompute is returned.
-static SCEVHandle SolveLinEquationWithOverflow(const APInt &A, const APInt &B,
+static const SCEV* SolveLinEquationWithOverflow(const APInt &A, const APInt &B,
ScalarEvolution &SE) {
uint32_t BW = A.getBitWidth();
assert(BW == B.getBitWidth() && "Bit widths must be the same.");
@@ -3633,7 +3632,7 @@ static SCEVHandle SolveLinEquationWithOverflow(const APInt &A, const APInt &B,
/// given quadratic chrec {L,+,M,+,N}. This returns either the two roots (which
/// might be the same) or two SCEVCouldNotCompute objects.
///
-static std::pair<SCEVHandle,SCEVHandle>
+static std::pair<const SCEV*,const SCEV*>
SolveQuadraticEquation(const SCEVAddRecExpr *AddRec, ScalarEvolution &SE) {
assert(AddRec->getNumOperands() == 3 && "This is not a quadratic chrec!");
const SCEVConstant *LC = dyn_cast<SCEVConstant>(AddRec->getOperand(0));
@@ -3692,7 +3691,7 @@ SolveQuadraticEquation(const SCEVAddRecExpr *AddRec, ScalarEvolution &SE) {
/// HowFarToZero - Return the number of times a backedge comparing the specified
/// value to zero will execute. If not computable, return CouldNotCompute.
-SCEVHandle ScalarEvolution::HowFarToZero(const SCEV *V, const Loop *L) {
+const SCEV* ScalarEvolution::HowFarToZero(const SCEV *V, const Loop *L) {
// If the value is a constant
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(V)) {
// If the value is already zero, the branch will execute zero times.
@@ -3717,8 +3716,8 @@ SCEVHandle ScalarEvolution::HowFarToZero(const SCEV *V, const Loop *L) {
// where BW is the common bit width of Start and Step.
// Get the initial value for the loop.
- SCEVHandle Start = getSCEVAtScope(AddRec->getStart(), L->getParentLoop());
- SCEVHandle Step = getSCEVAtScope(AddRec->getOperand(1), L->getParentLoop());
+ const SCEV* Start = getSCEVAtScope(AddRec->getStart(), L->getParentLoop());
+ const SCEV* Step = getSCEVAtScope(AddRec->getOperand(1), L->getParentLoop());
if (const SCEVConstant *StepC = dyn_cast<SCEVConstant>(Step)) {
// For now we handle only constant steps.
@@ -3738,7 +3737,7 @@ SCEVHandle ScalarEvolution::HowFarToZero(const SCEV *V, const Loop *L) {
} else if (AddRec->isQuadratic() && AddRec->getType()->isInteger()) {
// If this is a quadratic (3-term) AddRec {L,+,M,+,N}, find the roots of
// the quadratic equation to solve it.
- std::pair<SCEVHandle,SCEVHandle> Roots = SolveQuadraticEquation(AddRec,
+ std::pair<const SCEV*,const SCEV*> Roots = SolveQuadraticEquation(AddRec,
*this);
const SCEVConstant *R1 = dyn_cast<SCEVConstant>(Roots.first);
const SCEVConstant *R2 = dyn_cast<SCEVConstant>(Roots.second);
@@ -3757,7 +3756,7 @@ SCEVHandle ScalarEvolution::HowFarToZero(const SCEV *V, const Loop *L) {
// We can only use this value if the chrec ends up with an exact zero
// value at this index. When solving for "X*X != 5", for example, we
// should not accept a root of 2.
- SCEVHandle Val = AddRec->evaluateAtIteration(R1, *this);
+ const SCEV* Val = AddRec->evaluateAtIteration(R1, *this);
if (Val->isZero())
return R1; // We found a quadratic root!
}
@@ -3770,7 +3769,7 @@ SCEVHandle ScalarEvolution::HowFarToZero(const SCEV *V, const Loop *L) {
/// HowFarToNonZero - Return the number of times a backedge checking the
/// specified value for nonzero will execute. If not computable, return
/// CouldNotCompute
-SCEVHandle ScalarEvolution::HowFarToNonZero(const SCEV *V, const Loop *L) {
+const SCEV* ScalarEvolution::HowFarToNonZero(const SCEV *V, const Loop *L) {
// Loops that look like: while (X == 0) are very strange indeed. We don't
// handle them yet except for the trivial case. This could be expanded in the
// future as needed.
@@ -3831,7 +3830,7 @@ ScalarEvolution::getPredecessorWithUniqueSuccessorForBB(BasicBlock *BB) {
/// more general, since a front-end may have replicated the controlling
/// expression.
///
-static bool HasSameValue(const SCEVHandle &A, const SCEVHandle &B) {
+static bool HasSameValue(const SCEV* A, const SCEV* B) {
// Quick check to see if they are the same SCEV.
if (A == B) return true;
@@ -3946,8 +3945,8 @@ bool ScalarEvolution::isLoopGuardedByCond(const Loop *L,
if (!PreCondLHS->getType()->isInteger()) continue;
- SCEVHandle PreCondLHSSCEV = getSCEV(PreCondLHS);
- SCEVHandle PreCondRHSSCEV = getSCEV(PreCondRHS);
+ const SCEV* PreCondLHSSCEV = getSCEV(PreCondLHS);
+ const SCEV* PreCondRHSSCEV = getSCEV(PreCondRHS);
if ((HasSameValue(LHS, PreCondLHSSCEV) &&
HasSameValue(RHS, PreCondRHSSCEV)) ||
(HasSameValue(LHS, getNotSCEV(PreCondRHSSCEV)) &&
@@ -3961,22 +3960,22 @@ bool ScalarEvolution::isLoopGuardedByCond(const Loop *L,
/// getBECount - Subtract the end and start values and divide by the step,
/// rounding up, to get the number of times the backedge is executed. Return
/// CouldNotCompute if an intermediate computation overflows.
-SCEVHandle ScalarEvolution::getBECount(const SCEVHandle &Start,
- const SCEVHandle &End,
- const SCEVHandle &Step) {
+const SCEV* ScalarEvolution::getBECount(const SCEV* Start,
+ const SCEV* End,
+ const SCEV* Step) {
const Type *Ty = Start->getType();
- SCEVHandle NegOne = getIntegerSCEV(-1, Ty);
- SCEVHandle Diff = getMinusSCEV(End, Start);
- SCEVHandle RoundUp = getAddExpr(Step, NegOne);
+ const SCEV* NegOne = getIntegerSCEV(-1, Ty);
+ const SCEV* Diff = getMinusSCEV(End, Start);
+ const SCEV* RoundUp = getAddExpr(Step, NegOne);
// Add an adjustment to the difference between End and Start so that
// the division will effectively round up.
- SCEVHandle Add = getAddExpr(Diff, RoundUp);
+ const SCEV* Add = getAddExpr(Diff, RoundUp);
// Check Add for unsigned overflow.
// TODO: More sophisticated things could be done here.
const Type *WideTy = IntegerType::get(getTypeSizeInBits(Ty) + 1);
- SCEVHandle OperandExtendedAdd =
+ const SCEV* OperandExtendedAdd =
getAddExpr(getZeroExtendExpr(Diff, WideTy),
getZeroExtendExpr(RoundUp, WideTy));
if (getZeroExtendExpr(Add, WideTy) != OperandExtendedAdd)
@@ -4001,7 +4000,7 @@ HowManyLessThans(const SCEV *LHS, const SCEV *RHS,
if (AddRec->isAffine()) {
// FORNOW: We only support unit strides.
unsigned BitWidth = getTypeSizeInBits(AddRec->getType());
- SCEVHandle Step = AddRec->getStepRecurrence(*this);
+ const SCEV* Step = AddRec->getStepRecurrence(*this);
// TODO: handle non-constant strides.
const SCEVConstant *CStep = dyn_cast<SCEVConstant>(Step);
@@ -4037,10 +4036,10 @@ HowManyLessThans(const SCEV *LHS, const SCEV *RHS,
// treat m-n as signed nor unsigned due to overflow possibility.
// First, we get the value of the LHS in the first iteration: n
- SCEVHandle Start = AddRec->getOperand(0);
+ const SCEV* Start = AddRec->getOperand(0);
// Determine the minimum constant start value.
- SCEVHandle MinStart = isa<SCEVConstant>(Start) ? Start :
+ const SCEV* MinStart = isa<SCEVConstant>(Start) ? Start :
getConstant(isSigned ? APInt::getSignedMinValue(BitWidth) :
APInt::getMinValue(BitWidth));
@@ -4048,7 +4047,7 @@ HowManyLessThans(const SCEV *LHS, const SCEV *RHS,
// then we know that it will run exactly (m-n)/s times. Otherwise, we
// only know that it will execute (max(m,n)-n)/s times. In both cases,
// the division must round up.
- SCEVHandle End = RHS;
+ const SCEV* End = RHS;
if (!isLoopGuardedByCond(L,
isSigned ? ICmpInst::ICMP_SLT : ICmpInst::ICMP_ULT,
getMinusSCEV(Start, Step), RHS))
@@ -4056,7 +4055,7 @@ HowManyLessThans(const SCEV *LHS, const SCEV *RHS,
: getUMaxExpr(RHS, Start);
// Determine the maximum constant end value.
- SCEVHandle MaxEnd =
+ const SCEV* MaxEnd =
isa<SCEVConstant>(End) ? End :
getConstant(isSigned ? APInt::getSignedMaxValue(BitWidth)
.ashr(GetMinSignBits(End) - 1) :
@@ -4065,11 +4064,11 @@ HowManyLessThans(const SCEV *LHS, const SCEV *RHS,
// Finally, we subtract these two values and divide, rounding up, to get
// the number of times the backedge is executed.
- SCEVHandle BECount = getBECount(Start, End, Step);
+ const SCEV* BECount = getBECount(Start, End, Step);
// The maximum backedge count is similar, except using the minimum start
// value and the maximum end value.
- SCEVHandle MaxBECount = getBECount(MinStart, MaxEnd, Step);;
+ const SCEV* MaxBECount = getBECount(MinStart, MaxEnd, Step);;
return BackedgeTakenInfo(BECount, MaxBECount);
}
@@ -4082,7 +4081,7 @@ HowManyLessThans(const SCEV *LHS, const SCEV *RHS,
/// this is that it returns the first iteration number where the value is not in
/// the condition, thus computing the exit count. If the iteration count can't
/// be computed, an instance of SCEVCouldNotCompute is returned.
-SCEVHandle SCEVAddRecExpr::getNumIterationsInRange(ConstantRange Range,
+const SCEV* SCEVAddRecExpr::getNumIterationsInRange(ConstantRange Range,
ScalarEvolution &SE) const {
if (Range.isFullSet()) // Infinite loop.
return SE.getCouldNotCompute();
@@ -4090,9 +4089,9 @@ SCEVHandle SCEVAddRecExpr::getNumIterationsInRange(ConstantRange Range,
// If the start is a non-zero constant, shift the range to simplify things.
if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(getStart()))
if (!SC->getValue()->isZero()) {
- SmallVector<SCEVHandle, 4> Operands(op_begin(), op_end());
+ SmallVector<const SCEV*, 4> Operands(op_begin(), op_end());
Operands[0] = SE.getIntegerSCEV(0, SC->getType());
- SCEVHandle Shifted = SE.getAddRecExpr(Operands, getLoop());
+ const SCEV* Shifted = SE.getAddRecExpr(Operands, getLoop());
if (const SCEVAddRecExpr *ShiftedAddRec =
dyn_cast<SCEVAddRecExpr>(Shifted))
return ShiftedAddRec->getNumIterationsInRange(
@@ -4151,12 +4150,12 @@ SCEVHandle SCEVAddRecExpr::getNumIterationsInRange(ConstantRange Range,
// quadratic equation to solve it. To do this, we must frame our problem in
// terms of figuring out when zero is crossed, instead of when
// Range.getUpper() is crossed.
- SmallVector<SCEVHandle, 4> NewOps(op_begin(), op_end());
+ SmallVector<const SCEV*, 4> NewOps(op_begin(), op_end());
NewOps[0] = SE.getNegativeSCEV(SE.getConstant(Range.getUpper()));
- SCEVHandle NewAddRec = SE.getAddRecExpr(NewOps, getLoop());
+ const SCEV* NewAddRec = SE.getAddRecExpr(NewOps, getLoop());
// Next, solve the constructed addrec
- std::pair<SCEVHandle,SCEVHandle> Roots =
+ std::pair<const SCEV*,const SCEV*> Roots =
SolveQuadraticEquation(cast<SCEVAddRecExpr>(NewAddRec), SE);
const SCEVConstant *R1 = dyn_cast<SCEVConstant>(Roots.first);
const SCEVConstant *R2 = dyn_cast<SCEVConstant>(Roots.second);
@@ -4363,12 +4362,12 @@ void ScalarEvolution::print(raw_ostream &OS, const Module* ) const {
if (isSCEVable(I->getType())) {
OS << *I;
OS << " --> ";
- SCEVHandle SV = SE.getSCEV(&*I);
+ const SCEV* SV = SE.getSCEV(&*I);
SV->print(OS);
const Loop *L = LI->getLoopFor((*I).getParent());
- SCEVHandle AtUse = SE.getSCEVAtScope(SV, L);
+ const SCEV* AtUse = SE.getSCEVAtScope(SV, L);
if (AtUse != SV) {
OS << " --> ";
AtUse->print(OS);
@@ -4376,7 +4375,7 @@ void ScalarEvolution::print(raw_ostream &OS, const Module* ) const {
if (L) {
OS << "\t\t" "Exits: ";
- SCEVHandle ExitValue = SE.getSCEVAtScope(SV, L->getParentLoop());
+ const SCEV* ExitValue = SE.getSCEVAtScope(SV, L->getParentLoop());
if (!ExitValue->isLoopInvariant(L)) {
OS << "<<Unknown>>";
} else {
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index 2a73c27405..c7e296eef5 100644
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -152,8 +152,8 @@ Value *SCEVExpander::InsertBinop(Instruction::BinaryOps Opcode, Value *LHS,
/// TODO: When ScalarEvolution gets a SCEVSDivExpr, this can be made
/// unnecessary; in its place, just signed-divide Ops[i] by the scale and
/// check to see if the divide was folded.
-static bool FactorOutConstant(SCEVHandle &S,
- SCEVHandle &Remainder,
+static bool FactorOutConstant(const SCEV* &S,
+ const SCEV* &Remainder,
const APInt &Factor,
ScalarEvolution &SE) {
// Everything is divisible by one.
@@ -168,7 +168,7 @@ static bool FactorOutConstant(SCEVHandle &S,
// the value at this scale. It will be considered for subsequent
// smaller scales.
if (C->isZero() || !CI->isZero()) {
- SCEVHandle Div = SE.getConstant(CI);
+ const SCEV* Div = SE.getConstant(CI);
S = Div;
Remainder =
SE.getAddExpr(Remainder,
@@ -182,8 +182,8 @@ static bool FactorOutConstant(SCEVHandle &S,
if (const SCEVMulExpr *M = dyn_cast<SCEVMulExpr>(S))
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(M->getOperand(0)))
if (!C->getValue()->getValue().srem(Factor)) {
- const SmallVectorImpl<SCEVHandle> &MOperands = M->getOperands();
- SmallVector<SCEVHandle, 4> NewMulOps(MOperands.begin(), MOperands.end());
+ const SmallVectorImpl<const SCEV*> &MOperands = M->getOperands();
+ SmallVector<const SCEV*, 4> NewMulOps(MOperands.begin(), MOperands.end());
NewMulOps[0] =
SE.getConstant(C->getValue()->getValue().sdiv(Factor));
S = SE.getMulExpr(NewMulOps);
@@ -192,13 +192,13 @@ static bool FactorOutConstant(SCEVHandle &S,
// In an AddRec, check if both start and step are divisible.
if (const SCEVAddRecExpr *A = dyn_cast<SCEVAddRecExpr>(S)) {
- SCEVHandle Step = A->getStepRecurrence(SE);
- SCEVHandle StepRem = SE.getIntegerSCEV(0, Step->getType());
+ const SCEV* Step = A->getStepRecurrence(SE);
+ const SCEV* StepRem = SE.getIntegerSCEV(0, Step->getType());
if (!FactorOutConstant(Step, StepRem, Factor, SE))
return false;
if (!StepRem->isZero())
return false;
- SCEVHandle Start = A->getStart();
+ const SCEV* Start = A->getStart();
if (!FactorOutConstant(Start, Remainder, Factor, SE))
return false;
S = SE.getAddRecExpr(Start, Step, A->getLoop());
@@ -233,14 +233,14 @@ static bool FactorOutConstant(SCEVHandle &S,
/// loop-invariant portions of expressions, after considering what
/// can be folded using target addressing modes.
///
-Value *SCEVExpander::expandAddToGEP(const SCEVHandle *op_begin,
- const SCEVHandle *op_end,
+Value *SCEVExpander::expandAddToGEP(const SCEV* const *op_begin,
+ const SCEV* const *op_end,
const PointerType *PTy,
const Type *Ty,
Value *V) {
const Type *ElTy = PTy->getElementType();
SmallVector<Value *, 4> GepIndices;
- SmallVector<SCEVHandle, 8> Ops(op_begin, op_end);
+ SmallVector<const SCEV*, 8> Ops(op_begin, op_end);
bool AnyNonZeroIndices = false;
// Decend down the pointer's type and attempt to convert the other
@@ -251,14 +251,14 @@ Value *SCEVExpander::expandAddToGEP(const SCEVHandle *op_begin,
for (;;) {
APInt ElSize = APInt(SE.getTypeSizeInBits(Ty),
ElTy->isSized() ? SE.TD->getTypeAllocSize(ElTy) : 0);
- SmallVector<SCEVHandle, 8> NewOps;
- SmallVector<SCEVHandle, 8> ScaledOps;
+ SmallVector<const SCEV*, 8> NewOps;
+ SmallVector<const SCEV*, 8> ScaledOps;
for (unsigned i = 0, e = Ops.size(); i != e; ++i) {
// Split AddRecs up into parts as either of the parts may be usable
// without the other.
if (const SCEVAddRecExpr *A = dyn_cast<SCEVAddRecExpr>(Ops[i]))
if (!A->getStart()->isZero()) {
- SCEVHandle Start = A->getStart();
+ const SCEV* Start = A->getStart();
Ops.push_back(SE.getAddRecExpr(SE.getIntegerSCEV(0, A->getType()),
A->getStepRecurrence(SE),
A->getLoop()));
@@ -267,8 +267,8 @@ Value *SCEVExpander::expandAddToGEP(const SCEVHandle *op_begin,
}
// If the scale size is not 0, attempt to factor out a scale.
if (ElSize != 0) {
- SCEVHandle Op = Ops[i];
- SCEVHandle Remainder = SE.getIntegerSCEV(0, Op->getType());
+ const SCEV* Op = Ops[i];
+ const SCEV* Remainder = SE.getIntegerSCEV(0, Op->getType());
if (FactorOutConstant(Op, Remainder, ElSize, SE)) {
ScaledOps.push_back(Op); // Op now has ElSize factored out.
NewOps.push_back(Remainder);
@@ -364,7 +364,7 @@ Value *SCEVExpander::visitAddExpr(const SCEVAddExpr *S) {
// comments on expandAddToGEP for details.
if (SE.TD)
if (const PointerType *PTy = dyn_cast<PointerType>(V->getType())) {
- const SmallVectorImpl<SCEVHandle> &Ops = S->getOperands();
+ const SmallVectorImpl<const SCEV*> &Ops = S->getOperands();
return expandAddToGEP(&Ops[0], &Ops[Ops.size() - 1],
PTy, Ty, V);
}
@@ -420,7 +420,7 @@ Value *SCEVExpander::visitUDivExpr(const SCEVUDivExpr *S) {
/// Move parts of Base into Rest to leave Base with the minimal
/// expression that provides a pointer operand suitable for a
/// GEP expansion.
-static void ExposePointerBase(SCEVHandle &Base, SCEVHandle &Rest,
+static void ExposePointerBase(const SCEV* &Base, const SCEV* &Rest,
ScalarEvolution &SE) {
while (const SCEVAddRecExpr *A = dyn_cast<SCEVAddRecExpr>(Base)) {
Base = A->getStart();
@@ -431,7 +431,7 @@ static void ExposePointerBase(SCEVHandle &Base, SCEVHandle &Rest,
}
if (const SCEVAddExpr *A = dyn_cast<SCEVAddExpr>(Base)) {
Base = A->getOperand(A->getNumOperands()-1);
- SmallVector<SCEVHandle, 8> NewAddOps(A->op_begin(), A->op_end());
+ SmallVector<const SCEV*, 8> NewAddOps(A->op_begin(), A->op_end());
NewAddOps.back() = Rest;
Rest = SE.getAddExpr(NewAddOps);
ExposePointerBase(Base, Rest, SE);
@@ -455,9 +455,9 @@ Value *SCEVExpander::visitAddRecExpr(const SCEVAddRecExpr *S) {
if (CanonicalIV &&
SE.getTypeSizeInBits(CanonicalIV->getType()) >
SE.getTypeSizeInBits(Ty)) {
- SCEVHandle Start = SE.getAnyExtendExpr(S->getStart(),
+ const SCEV* Start = SE.getAnyExtendExpr(S->getStart(),
CanonicalIV->getType());
- SCEVHandle Step = SE.getAnyExtendExpr(S->getStepRecurrence(SE),
+ const SCEV* Step = SE.getAnyExtendExpr(S->getStepRecurrence(SE),
CanonicalIV->getType());
Value *V = expand(SE.getAddRecExpr(Start, Step, S->getLoop()));
BasicBlock::iterator SaveInsertPt = getInsertionPoint();
@@ -472,16 +472,16 @@ Value *SCEVExpander::visitAddRecExpr(const SCEVAddRecExpr *S) {
// {X,+,F} --> X + {0,+,F}
if (!S->getStart()->isZero()) {
- const SmallVectorImpl<SCEVHandle> &SOperands = S->getOperands();
- SmallVector<SCEVHandle, 4> NewOps(SOperands.begin(), SOperands.end());
+ const SmallVectorImpl<const SCEV*> &SOperands = S->getOperands();
+ SmallVector<const SCEV*, 4> NewOps(SOperands.begin(), SOperands.end());
NewOps[0] = SE.getIntegerSCEV(0, Ty);
- SCEVHandle Rest = SE.getAddRecExpr(NewOps, L);
+ const SCEV* Rest = SE.getAddRecExpr(NewOps, L);
// Turn things like ptrtoint+arithmetic+inttoptr into GEP. See the
// comments on expandAddToGEP for details.
if (SE.TD) {
- SCEVHandle Base = S->getStart();
- SCEVHandle RestArray[1] = { Rest };
+ const SCEV* Base = S->getStart();
+ const SCEV* RestArray[1] = { Rest };
// Dig into the expression to find the pointer base for a GEP.
ExposePointerBase(Base, RestArray[0], SE);
// If we found a pointer, expand the AddRec with a GEP.
@@ -581,19 +581,19 @@ Value *SCEVExpander::visitAddRecExpr(const SCEVAddRecExpr *S) {
// folders, then expandCodeFor the closed form. This allows the folders to
// simplify the expression without having to build a bunch of special code
// into this folder.
- SCEVHandle IH = SE.getUnknown(I); // Get I as a "symbolic" SCEV.
+ const SCEV* IH = SE.getUnknown(I); // Get I as a "symbolic" SCEV.
// Promote S up to the canonical IV type, if the cast is foldable.
- SCEVHandle NewS = S;
- SCEVHandle Ext = SE.getNoopOrAnyExtend(S, I->getType());
+ const SCEV* NewS = S;
+ const SCEV* Ext = SE.getNoopOrAnyExtend(S, I->getType());
if (isa<SCEVAddRecExpr>(Ext))
NewS = Ext;
- SCEVHandle V = cast<SCEVAddRecExpr>(NewS)->evaluateAtIteration(IH, SE);
+ const SCEV* V = cast<SCEVAddRecExpr>(NewS)->evaluateAtIteration(IH, SE);
//cerr << "Evaluated: " << *this << "\n to: " << *V << "\n";
// Truncate the result down to the original type, if needed.
- SCEVHandle T = SE.getTruncateOrNoop(V, Ty);
+ const SCEV* T = SE.getTruncateOrNoop(V, Ty);
return expand(V);
}
@@ -654,7 +654,7 @@ Value *SCEVExpander::visitUMaxExpr(const SCEVUMaxExpr *S) {
return LHS;
}
-Value *SCEVExpander::expandCodeFor(SCEVHandle SH, const Type *Ty) {
+Value *SCEVExpander::expandCodeFor(const SCEV* SH, const Type *Ty) {
// Expand the code for this SCEV.
Value *V = expand(SH);
if (Ty) {
@@ -667,7 +667,7 @@ Value *SCEVExpander::expandCodeFor(SCEVHandle SH, const Type *Ty) {
Value *SCEVExpander::expand(const SCEV *S) {
// Check to see if we already expanded this.
- std::map<SCEVHandle, AssertingVH<Value> >::iterator I =
+ std::map<const SCEV*, AssertingVH<Value> >::iterator I =
InsertedExpressions.find(S);
if (I != InsertedExpressions.end())
return I->second;
@@ -685,7 +685,7 @@ Value *
SCEVExpander::getOrInsertCanonicalInductionVariable(const Loop *L,
const Type *Ty) {
assert(Ty->isInteger() && "Can only insert integer induction variables!");
- SCEVHandle H = SE.getAddRecExpr(SE.getIntegerSCEV(0, Ty),
+ const SCEV* H = SE.getAddRecExpr(SE.getIntegerSCEV(0, Ty),
SE.getIntegerSCEV(1, Ty), L);
return expand(H);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-19 14:59:01 +0000