SCEVHandle is no more!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73906 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 7579748..ba60058 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -64,11 +64,11 @@
/// StrengthReduceStridedIVUsers. It contains the stride, the common base, as
/// well as the PHI node and increment value created for rewrite.
struct VISIBILITY_HIDDEN IVExpr {
- SCEVHandle Stride;
- SCEVHandle Base;
+ const SCEV* Stride;
+ const SCEV* Base;
PHINode *PHI;
- IVExpr(const SCEVHandle &stride, const SCEVHandle &base, PHINode *phi)
+ IVExpr(const SCEV* const stride, const SCEV* const base, PHINode *phi)
: Stride(stride), Base(base), PHI(phi) {}
};
@@ -77,7 +77,7 @@
struct VISIBILITY_HIDDEN IVsOfOneStride {
std::vector<IVExpr> IVs;
- void addIV(const SCEVHandle &Stride, const SCEVHandle &Base, PHINode *PHI) {
+ void addIV(const SCEV* const Stride, const SCEV* const Base, PHINode *PHI) {
IVs.push_back(IVExpr(Stride, Base, PHI));
}
};
@@ -91,11 +91,11 @@
/// IVsByStride - Keep track of all IVs that have been inserted for a
/// particular stride.
- std::map<SCEVHandle, IVsOfOneStride> IVsByStride;
+ std::map<const SCEV*, IVsOfOneStride> IVsByStride;
/// StrideNoReuse - Keep track of all the strides whose ivs cannot be
/// reused (nor should they be rewritten to reuse other strides).
- SmallSet<SCEVHandle, 4> StrideNoReuse;
+ SmallSet<const SCEV*, 4> StrideNoReuse;
/// DeadInsts - Keep track of instructions we may have made dead, so that
/// we can remove them after we are done working.
@@ -133,7 +133,7 @@
private:
ICmpInst *ChangeCompareStride(Loop *L, ICmpInst *Cond,
IVStrideUse* &CondUse,
- const SCEVHandle* &CondStride);
+ const SCEV* const * &CondStride);
void OptimizeIndvars(Loop *L);
void OptimizeLoopCountIV(Loop *L);
@@ -149,16 +149,16 @@
IVStrideUse* &CondUse);
bool FindIVUserForCond(ICmpInst *Cond, IVStrideUse *&CondUse,
- const SCEVHandle *&CondStride);
+ const SCEV* const * &CondStride);
bool RequiresTypeConversion(const Type *Ty, const Type *NewTy);
- SCEVHandle CheckForIVReuse(bool, bool, bool, const SCEVHandle&,
+ const SCEV* CheckForIVReuse(bool, bool, bool, const SCEV* const&,
IVExpr&, const Type*,
const std::vector<BasedUser>& UsersToProcess);
bool ValidScale(bool, int64_t,
const std::vector<BasedUser>& UsersToProcess);
bool ValidOffset(bool, int64_t, int64_t,
const std::vector<BasedUser>& UsersToProcess);
- SCEVHandle CollectIVUsers(const SCEVHandle &Stride,
+ const SCEV* CollectIVUsers(const SCEV* const &Stride,
IVUsersOfOneStride &Uses,
Loop *L,
bool &AllUsesAreAddresses,
@@ -168,11 +168,11 @@
const std::vector<BasedUser> &UsersToProcess,
const Loop *L,
bool AllUsesAreAddresses,
- SCEVHandle Stride);
+ const SCEV* Stride);
void PrepareToStrengthReduceFully(
std::vector<BasedUser> &UsersToProcess,
- SCEVHandle Stride,
- SCEVHandle CommonExprs,
+ const SCEV* Stride,
+ const SCEV* CommonExprs,
const Loop *L,
SCEVExpander &PreheaderRewriter);
void PrepareToStrengthReduceFromSmallerStride(
@@ -182,13 +182,13 @@
Instruction *PreInsertPt);
void PrepareToStrengthReduceWithNewPhi(
std::vector<BasedUser> &UsersToProcess,
- SCEVHandle Stride,
- SCEVHandle CommonExprs,
+ const SCEV* Stride,
+ const SCEV* CommonExprs,
Value *CommonBaseV,
Instruction *IVIncInsertPt,
const Loop *L,
SCEVExpander &PreheaderRewriter);
- void StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
+ void StrengthReduceStridedIVUsers(const SCEV* const &Stride,
IVUsersOfOneStride &Uses,
Loop *L);
void DeleteTriviallyDeadInstructions();
@@ -232,7 +232,7 @@
/// 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;
@@ -327,7 +327,7 @@
/// this use. As the use is processed, information gets moved from this
/// field to the Imm field (below). BasedUser values are sorted by this
/// field.
- SCEVHandle Base;
+ const SCEV* Base;
/// Inst - The instruction using the induction variable.
Instruction *Inst;
@@ -340,7 +340,7 @@
/// before Inst, because it will be folded into the imm field of the
/// instruction. This is also sometimes used for loop-variant values that
/// must be added inside the loop.
- SCEVHandle Imm;
+ const SCEV* Imm;
/// Phi - The induction variable that performs the striding that
/// should be used for this user.
@@ -362,13 +362,13 @@
// Once we rewrite the code to insert the new IVs we want, update the
// operands of Inst to use the new expression 'NewBase', with 'Imm' added
// to it.
- void RewriteInstructionToUseNewBase(const SCEVHandle &NewBase,
+ void RewriteInstructionToUseNewBase(const SCEV* const &NewBase,
Instruction *InsertPt,
SCEVExpander &Rewriter, Loop *L, Pass *P,
LoopInfo &LI,
SmallVectorImpl<WeakVH> &DeadInsts);
- Value *InsertCodeForBaseAtPosition(const SCEVHandle &NewBase,
+ Value *InsertCodeForBaseAtPosition(const SCEV* const &NewBase,
const Type *Ty,
SCEVExpander &Rewriter,
Instruction *IP, Loop *L,
@@ -383,7 +383,7 @@
cerr << " Inst: " << *Inst;
}
-Value *BasedUser::InsertCodeForBaseAtPosition(const SCEVHandle &NewBase,
+Value *BasedUser::InsertCodeForBaseAtPosition(const SCEV* const &NewBase,
const Type *Ty,
SCEVExpander &Rewriter,
Instruction *IP, Loop *L,
@@ -407,7 +407,7 @@
Value *Base = Rewriter.expandCodeFor(NewBase, 0, BaseInsertPt);
- SCEVHandle NewValSCEV = SE->getUnknown(Base);
+ const SCEV* NewValSCEV = SE->getUnknown(Base);
// If there is no immediate value, skip the next part.
if (!Imm->isZero()) {
@@ -430,7 +430,7 @@
// value of NewBase in the case that it's a diffferent instruction from
// the PHI that NewBase is computed from, or null otherwise.
//
-void BasedUser::RewriteInstructionToUseNewBase(const SCEVHandle &NewBase,
+void BasedUser::RewriteInstructionToUseNewBase(const SCEV* const &NewBase,
Instruction *NewBasePt,
SCEVExpander &Rewriter, Loop *L, Pass *P,
LoopInfo &LI,
@@ -542,7 +542,7 @@
/// fitsInAddressMode - Return true if V can be subsumed within an addressing
/// mode, and does not need to be put in a register first.
-static bool fitsInAddressMode(const SCEVHandle &V, const Type *AccessTy,
+static bool fitsInAddressMode(const SCEV* const &V, const Type *AccessTy,
const TargetLowering *TLI, bool HasBaseReg) {
if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(V)) {
int64_t VC = SC->getValue()->getSExtValue();
@@ -574,12 +574,12 @@
/// MoveLoopVariantsToImmediateField - Move any subexpressions from Val that are
/// loop varying to the Imm operand.
-static void MoveLoopVariantsToImmediateField(SCEVHandle &Val, SCEVHandle &Imm,
+static void MoveLoopVariantsToImmediateField(const SCEV* &Val, const SCEV* &Imm,
Loop *L, ScalarEvolution *SE) {
if (Val->isLoopInvariant(L)) return; // Nothing to do.
if (const SCEVAddExpr *SAE = dyn_cast<SCEVAddExpr>(Val)) {
- SmallVector<SCEVHandle, 4> NewOps;
+ SmallVector<const SCEV*, 4> NewOps;
NewOps.reserve(SAE->getNumOperands());
for (unsigned i = 0; i != SAE->getNumOperands(); ++i)
@@ -597,10 +597,10 @@
Val = SE->getAddExpr(NewOps);
} else if (const SCEVAddRecExpr *SARE = dyn_cast<SCEVAddRecExpr>(Val)) {
// Try to pull immediates out of the start value of nested addrec's.
- SCEVHandle Start = SARE->getStart();
+ const SCEV* Start = SARE->getStart();
MoveLoopVariantsToImmediateField(Start, Imm, L, SE);
- SmallVector<SCEVHandle, 4> Ops(SARE->op_begin(), SARE->op_end());
+ SmallVector<const SCEV*, 4> Ops(SARE->op_begin(), SARE->op_end());
Ops[0] = Start;
Val = SE->getAddRecExpr(Ops, SARE->getLoop());
} else {
@@ -616,15 +616,15 @@
/// Accumulate these immediate values into the Imm value.
static void MoveImmediateValues(const TargetLowering *TLI,
const Type *AccessTy,
- SCEVHandle &Val, SCEVHandle &Imm,
+ const SCEV* &Val, const SCEV* &Imm,
bool isAddress, Loop *L,
ScalarEvolution *SE) {
if (const SCEVAddExpr *SAE = dyn_cast<SCEVAddExpr>(Val)) {
- SmallVector<SCEVHandle, 4> NewOps;
+ SmallVector<const SCEV*, 4> NewOps;
NewOps.reserve(SAE->getNumOperands());
for (unsigned i = 0; i != SAE->getNumOperands(); ++i) {
- SCEVHandle NewOp = SAE->getOperand(i);
+ const SCEV* NewOp = SAE->getOperand(i);
MoveImmediateValues(TLI, AccessTy, NewOp, Imm, isAddress, L, SE);
if (!NewOp->isLoopInvariant(L)) {
@@ -643,11 +643,11 @@
return;
} else if (const SCEVAddRecExpr *SARE = dyn_cast<SCEVAddRecExpr>(Val)) {
// Try to pull immediates out of the start value of nested addrec's.
- SCEVHandle Start = SARE->getStart();
+ const SCEV* Start = SARE->getStart();
MoveImmediateValues(TLI, AccessTy, Start, Imm, isAddress, L, SE);
if (Start != SARE->getStart()) {
- SmallVector<SCEVHandle, 4> Ops(SARE->op_begin(), SARE->op_end());
+ SmallVector<const SCEV*, 4> Ops(SARE->op_begin(), SARE->op_end());
Ops[0] = Start;
Val = SE->getAddRecExpr(Ops, SARE->getLoop());
}
@@ -658,8 +658,8 @@
fitsInAddressMode(SME->getOperand(0), AccessTy, TLI, false) &&
SME->getNumOperands() == 2 && SME->isLoopInvariant(L)) {
- SCEVHandle SubImm = SE->getIntegerSCEV(0, Val->getType());
- SCEVHandle NewOp = SME->getOperand(1);
+ const SCEV* SubImm = SE->getIntegerSCEV(0, Val->getType());
+ const SCEV* NewOp = SME->getOperand(1);
MoveImmediateValues(TLI, AccessTy, NewOp, SubImm, isAddress, L, SE);
// If we extracted something out of the subexpressions, see if we can
@@ -694,7 +694,7 @@
static void MoveImmediateValues(const TargetLowering *TLI,
Instruction *User,
- SCEVHandle &Val, SCEVHandle &Imm,
+ const SCEV* &Val, const SCEV* &Imm,
bool isAddress, Loop *L,
ScalarEvolution *SE) {
const Type *AccessTy = getAccessType(User);
@@ -704,19 +704,19 @@
/// SeparateSubExprs - Decompose Expr into all of the subexpressions that are
/// added together. This is used to reassociate common addition subexprs
/// together for maximal sharing when rewriting bases.
-static void SeparateSubExprs(SmallVector<SCEVHandle, 16> &SubExprs,
- SCEVHandle Expr,
+static void SeparateSubExprs(SmallVector<const SCEV*, 16> &SubExprs,
+ const SCEV* Expr,
ScalarEvolution *SE) {
if (const SCEVAddExpr *AE = dyn_cast<SCEVAddExpr>(Expr)) {
for (unsigned j = 0, e = AE->getNumOperands(); j != e; ++j)
SeparateSubExprs(SubExprs, AE->getOperand(j), SE);
} else if (const SCEVAddRecExpr *SARE = dyn_cast<SCEVAddRecExpr>(Expr)) {
- SCEVHandle Zero = SE->getIntegerSCEV(0, Expr->getType());
+ const SCEV* Zero = SE->getIntegerSCEV(0, Expr->getType());
if (SARE->getOperand(0) == Zero) {
SubExprs.push_back(Expr);
} else {
// Compute the addrec with zero as its base.
- SmallVector<SCEVHandle, 4> Ops(SARE->op_begin(), SARE->op_end());
+ SmallVector<const SCEV*, 4> Ops(SARE->op_begin(), SARE->op_end());
Ops[0] = Zero; // Start with zero base.
SubExprs.push_back(SE->getAddRecExpr(Ops, SARE->getLoop()));
@@ -740,7 +740,7 @@
/// not remove anything. This looks for things like (a+b+c) and
/// (a+c+d) and computes the common (a+c) subexpression. The common expression
/// is *removed* from the Bases and returned.
-static SCEVHandle
+static const SCEV*
RemoveCommonExpressionsFromUseBases(std::vector<BasedUser> &Uses,
ScalarEvolution *SE, Loop *L,
const TargetLowering *TLI) {
@@ -748,9 +748,9 @@
// Only one use? This is a very common case, so we handle it specially and
// cheaply.
- SCEVHandle Zero = SE->getIntegerSCEV(0, Uses[0].Base->getType());
- SCEVHandle Result = Zero;
- SCEVHandle FreeResult = Zero;
+ const SCEV* Zero = SE->getIntegerSCEV(0, Uses[0].Base->getType());
+ const SCEV* Result = Zero;
+ const SCEV* FreeResult = Zero;
if (NumUses == 1) {
// If the use is inside the loop, use its base, regardless of what it is:
// it is clearly shared across all the IV's. If the use is outside the loop
@@ -766,13 +766,13 @@
// Also track whether all uses of each expression can be moved into an
// an addressing mode "for free"; such expressions are left within the loop.
// struct SubExprUseData { unsigned Count; bool notAllUsesAreFree; };
- std::map<SCEVHandle, SubExprUseData> SubExpressionUseData;
+ std::map<const SCEV*, SubExprUseData> SubExpressionUseData;
// UniqueSubExprs - Keep track of all of the subexpressions we see in the
// order we see them.
- SmallVector<SCEVHandle, 16> UniqueSubExprs;
+ SmallVector<const SCEV*, 16> UniqueSubExprs;
- SmallVector<SCEVHandle, 16> SubExprs;
+ SmallVector<const SCEV*, 16> SubExprs;
unsigned NumUsesInsideLoop = 0;
for (unsigned i = 0; i != NumUses; ++i) {
// If the user is outside the loop, just ignore it for base computation.
@@ -816,7 +816,7 @@
// Now that we know how many times each is used, build Result. Iterate over
// UniqueSubexprs so that we have a stable ordering.
for (unsigned i = 0, e = UniqueSubExprs.size(); i != e; ++i) {
- std::map<SCEVHandle, SubExprUseData>::iterator I =
+ std::map<const SCEV*, SubExprUseData>::iterator I =
SubExpressionUseData.find(UniqueSubExprs[i]);
assert(I != SubExpressionUseData.end() && "Entry not found?");
if (I->second.Count == NumUsesInsideLoop) { // Found CSE!
@@ -860,7 +860,7 @@
if (FreeResult != Zero) {
SeparateSubExprs(SubExprs, FreeResult, SE);
for (unsigned j = 0, e = SubExprs.size(); j != e; ++j) {
- std::map<SCEVHandle, SubExprUseData>::iterator I =
+ std::map<const SCEV*, SubExprUseData>::iterator I =
SubExpressionUseData.find(SubExprs[j]);
SubExpressionUseData.erase(I);
}
@@ -989,10 +989,10 @@
/// be folded into the addressing mode, nor even that the factor be constant;
/// a multiply (executed once) outside the loop is better than another IV
/// within. Well, usually.
-SCEVHandle LoopStrengthReduce::CheckForIVReuse(bool HasBaseReg,
+const SCEV* LoopStrengthReduce::CheckForIVReuse(bool HasBaseReg,
bool AllUsesAreAddresses,
bool AllUsesAreOutsideLoop,
- const SCEVHandle &Stride,
+ const SCEV* const &Stride,
IVExpr &IV, const Type *Ty,
const std::vector<BasedUser>& UsersToProcess) {
if (StrideNoReuse.count(Stride))
@@ -1002,7 +1002,7 @@
int64_t SInt = SC->getValue()->getSExtValue();
for (unsigned NewStride = 0, e = IU->StrideOrder.size();
NewStride != e; ++NewStride) {
- std::map<SCEVHandle, IVsOfOneStride>::iterator SI =
+ std::map<const SCEV*, IVsOfOneStride>::iterator SI =
IVsByStride.find(IU->StrideOrder[NewStride]);
if (SI == IVsByStride.end() || !isa<SCEVConstant>(SI->first) ||
StrideNoReuse.count(SI->first))
@@ -1055,7 +1055,7 @@
// an existing IV if we can.
for (unsigned NewStride = 0, e = IU->StrideOrder.size();
NewStride != e; ++NewStride) {
- std::map<SCEVHandle, IVsOfOneStride>::iterator SI =
+ std::map<const SCEV*, IVsOfOneStride>::iterator SI =
IVsByStride.find(IU->StrideOrder[NewStride]);
if (SI == IVsByStride.end() || !isa<SCEVConstant>(SI->first))
continue;
@@ -1075,7 +1075,7 @@
// -1*old.
for (unsigned NewStride = 0, e = IU->StrideOrder.size();
NewStride != e; ++NewStride) {
- std::map<SCEVHandle, IVsOfOneStride>::iterator SI =
+ std::map<const SCEV*, IVsOfOneStride>::iterator SI =
IVsByStride.find(IU->StrideOrder[NewStride]);
if (SI == IVsByStride.end())
continue;
@@ -1104,7 +1104,7 @@
/// isNonConstantNegative - Return true if the specified scev is negated, but
/// not a constant.
-static bool isNonConstantNegative(const SCEVHandle &Expr) {
+static bool isNonConstantNegative(const SCEV* const &Expr) {
const SCEVMulExpr *Mul = dyn_cast<SCEVMulExpr>(Expr);
if (!Mul) return false;
@@ -1121,7 +1121,7 @@
/// of the strided accesses, as well as the old information from Uses. We
/// progressively move information from the Base field to the Imm field, until
/// we eventually have the full access expression to rewrite the use.
-SCEVHandle LoopStrengthReduce::CollectIVUsers(const SCEVHandle &Stride,
+const SCEV* LoopStrengthReduce::CollectIVUsers(const SCEV* const &Stride,
IVUsersOfOneStride &Uses,
Loop *L,
bool &AllUsesAreAddresses,
@@ -1152,7 +1152,7 @@
// for the strides (e.g. if we have "A+C+B" and "A+B+D" as our bases, find
// "A+B"), emit it to the preheader, then remove the expression from the
// UsersToProcess base values.
- SCEVHandle CommonExprs =
+ const SCEV* CommonExprs =
RemoveCommonExpressionsFromUseBases(UsersToProcess, SE, L, TLI);
// Next, figure out what we can represent in the immediate fields of
@@ -1218,7 +1218,7 @@
const std::vector<BasedUser> &UsersToProcess,
const Loop *L,
bool AllUsesAreAddresses,
- SCEVHandle Stride) {
+ const SCEV* Stride) {
if (!EnableFullLSRMode)
return false;
@@ -1255,7 +1255,7 @@
if (!Imm) Imm = SE->getIntegerSCEV(0, Stride->getType());
const Instruction *Inst = UsersToProcess[i].Inst;
const Type *AccessTy = getAccessType(Inst);
- SCEVHandle Diff = SE->getMinusSCEV(UsersToProcess[i].Imm, Imm);
+ const SCEV* Diff = SE->getMinusSCEV(UsersToProcess[i].Imm, Imm);
if (!Diff->isZero() &&
(!AllUsesAreAddresses ||
!fitsInAddressMode(Diff, AccessTy, TLI, /*HasBaseReg=*/true)))
@@ -1289,7 +1289,7 @@
///
/// Return the created phi node.
///
-static PHINode *InsertAffinePhi(SCEVHandle Start, SCEVHandle Step,
+static PHINode *InsertAffinePhi(const SCEV* Start, const SCEV* Step,
Instruction *IVIncInsertPt,
const Loop *L,
SCEVExpander &Rewriter) {
@@ -1309,7 +1309,7 @@
// If the stride is negative, insert a sub instead of an add for the
// increment.
bool isNegative = isNonConstantNegative(Step);
- SCEVHandle IncAmount = Step;
+ const SCEV* IncAmount = Step;
if (isNegative)
IncAmount = Rewriter.SE.getNegativeSCEV(Step);
@@ -1348,13 +1348,13 @@
// loop before users outside of the loop with a particular base.
//
// We would like to use stable_sort here, but we can't. The problem is that
- // SCEVHandle's don't have a deterministic ordering w.r.t to each other, so
+ // const SCEV*'s don't have a deterministic ordering w.r.t to each other, so
// we don't have anything to do a '<' comparison on. Because we think the
// number of uses is small, do a horrible bubble sort which just relies on
// ==.
for (unsigned i = 0, e = UsersToProcess.size(); i != e; ++i) {
// Get a base value.
- SCEVHandle Base = UsersToProcess[i].Base;
+ const SCEV* Base = UsersToProcess[i].Base;
// Compact everything with this base to be consecutive with this one.
for (unsigned j = i+1; j != e; ++j) {
@@ -1373,8 +1373,8 @@
void
LoopStrengthReduce::PrepareToStrengthReduceFully(
std::vector<BasedUser> &UsersToProcess,
- SCEVHandle Stride,
- SCEVHandle CommonExprs,
+ const SCEV* Stride,
+ const SCEV* CommonExprs,
const Loop *L,
SCEVExpander &PreheaderRewriter) {
DOUT << " Fully reducing all users\n";
@@ -1386,9 +1386,9 @@
// TODO: The uses are grouped by base, but not sorted. We arbitrarily
// pick the first Imm value here to start with, and adjust it for the
// other uses.
- SCEVHandle Imm = UsersToProcess[i].Imm;
- SCEVHandle Base = UsersToProcess[i].Base;
- SCEVHandle Start = SE->getAddExpr(CommonExprs, Base, Imm);
+ const SCEV* Imm = UsersToProcess[i].Imm;
+ const SCEV* Base = UsersToProcess[i].Base;
+ const SCEV* Start = SE->getAddExpr(CommonExprs, Base, Imm);
PHINode *Phi = InsertAffinePhi(Start, Stride, IVIncInsertPt, L,
PreheaderRewriter);
// Loop over all the users with the same base.
@@ -1420,8 +1420,8 @@
void
LoopStrengthReduce::PrepareToStrengthReduceWithNewPhi(
std::vector<BasedUser> &UsersToProcess,
- SCEVHandle Stride,
- SCEVHandle CommonExprs,
+ const SCEV* Stride,
+ const SCEV* CommonExprs,
Value *CommonBaseV,
Instruction *IVIncInsertPt,
const Loop *L,
@@ -1497,7 +1497,7 @@
/// StrengthReduceStridedIVUsers - Strength reduce all of the users of a single
/// stride of IV. All of the users may have different starting values, and this
/// may not be the only stride.
-void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
+void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEV* const &Stride,
IVUsersOfOneStride &Uses,
Loop *L) {
// If all the users are moved to another stride, then there is nothing to do.
@@ -1520,7 +1520,7 @@
// move information from the Base field to the Imm field, until we eventually
// have the full access expression to rewrite the use.
std::vector<BasedUser> UsersToProcess;
- SCEVHandle CommonExprs = CollectIVUsers(Stride, Uses, L, AllUsesAreAddresses,
+ const SCEV* CommonExprs = CollectIVUsers(Stride, Uses, L, AllUsesAreAddresses,
AllUsesAreOutsideLoop,
UsersToProcess);
@@ -1538,8 +1538,8 @@
// If all uses are addresses, consider sinking the immediate part of the
// common expression back into uses if they can fit in the immediate fields.
if (TLI && HaveCommonExprs && AllUsesAreAddresses) {
- SCEVHandle NewCommon = CommonExprs;
- SCEVHandle Imm = SE->getIntegerSCEV(0, ReplacedTy);
+ const SCEV* NewCommon = CommonExprs;
+ const SCEV* Imm = SE->getIntegerSCEV(0, ReplacedTy);
MoveImmediateValues(TLI, Type::VoidTy, NewCommon, Imm, true, L, SE);
if (!Imm->isZero()) {
bool DoSink = true;
@@ -1585,7 +1585,7 @@
Value *CommonBaseV = Constant::getNullValue(ReplacedTy);
- SCEVHandle RewriteFactor = SE->getIntegerSCEV(0, ReplacedTy);
+ const SCEV* RewriteFactor = SE->getIntegerSCEV(0, ReplacedTy);
IVExpr ReuseIV(SE->getIntegerSCEV(0, Type::Int32Ty),
SE->getIntegerSCEV(0, Type::Int32Ty),
0);
@@ -1625,7 +1625,7 @@
// strength-reduced forms. This outer loop handles all bases, the inner
// loop handles all users of a particular base.
while (!UsersToProcess.empty()) {
- SCEVHandle Base = UsersToProcess.back().Base;
+ const SCEV* Base = UsersToProcess.back().Base;
Instruction *Inst = UsersToProcess.back().Inst;
// Emit the code for Base into the preheader.
@@ -1679,7 +1679,7 @@
User.Inst->moveBefore(IVIncInsertPt);
}
- SCEVHandle RewriteExpr = SE->getUnknown(RewriteOp);
+ const SCEV* RewriteExpr = SE->getUnknown(RewriteOp);
if (SE->getEffectiveSCEVType(RewriteOp->getType()) !=
SE->getEffectiveSCEVType(ReplacedTy)) {
@@ -1711,7 +1711,7 @@
// The base has been used to initialize the PHI node but we don't want
// it here.
if (!ReuseIV.Base->isZero()) {
- SCEVHandle typedBase = ReuseIV.Base;
+ const SCEV* typedBase = ReuseIV.Base;
if (SE->getEffectiveSCEVType(RewriteExpr->getType()) !=
SE->getEffectiveSCEVType(ReuseIV.Base->getType())) {
// It's possible the original IV is a larger type than the new IV,
@@ -1776,10 +1776,10 @@
/// set the IV user and stride information and return true, otherwise return
/// false.
bool LoopStrengthReduce::FindIVUserForCond(ICmpInst *Cond, IVStrideUse *&CondUse,
- const SCEVHandle *&CondStride) {
+ const SCEV* const * &CondStride) {
for (unsigned Stride = 0, e = IU->StrideOrder.size();
Stride != e && !CondUse; ++Stride) {
- std::map<SCEVHandle, IVUsersOfOneStride *>::iterator SI =
+ std::map<const SCEV*, IVUsersOfOneStride *>::iterator SI =
IU->IVUsesByStride.find(IU->StrideOrder[Stride]);
assert(SI != IU->IVUsesByStride.end() && "Stride doesn't exist!");
@@ -1806,7 +1806,7 @@
const ScalarEvolution *SE;
explicit StrideCompare(const ScalarEvolution *se) : SE(se) {}
- bool operator()(const SCEVHandle &LHS, const SCEVHandle &RHS) {
+ bool operator()(const SCEV* const &LHS, const SCEV* const &RHS) {
const SCEVConstant *LHSC = dyn_cast<SCEVConstant>(LHS);
const SCEVConstant *RHSC = dyn_cast<SCEVConstant>(RHS);
if (LHSC && RHSC) {
@@ -1849,14 +1849,14 @@
/// if (v1 < 30) goto loop
ICmpInst *LoopStrengthReduce::ChangeCompareStride(Loop *L, ICmpInst *Cond,
IVStrideUse* &CondUse,
- const SCEVHandle* &CondStride) {
+ const SCEV* const* &CondStride) {
// If there's only one stride in the loop, there's nothing to do here.
if (IU->StrideOrder.size() < 2)
return Cond;
// If there are other users of the condition's stride, don't bother
// trying to change the condition because the stride will still
// remain.
- std::map<SCEVHandle, IVUsersOfOneStride *>::iterator I =
+ std::map<const SCEV*, IVUsersOfOneStride *>::iterator I =
IU->IVUsesByStride.find(*CondStride);
if (I == IU->IVUsesByStride.end() ||
I->second->Users.size() != 1)
@@ -1873,11 +1873,11 @@
const Type *NewCmpTy = NULL;
unsigned TyBits = SE->getTypeSizeInBits(CmpTy);
unsigned NewTyBits = 0;
- SCEVHandle *NewStride = NULL;
+ const SCEV* *NewStride = NULL;
Value *NewCmpLHS = NULL;
Value *NewCmpRHS = NULL;
int64_t Scale = 1;
- SCEVHandle NewOffset = SE->getIntegerSCEV(0, CmpTy);
+ const SCEV* NewOffset = SE->getIntegerSCEV(0, CmpTy);
if (ConstantInt *C = dyn_cast<ConstantInt>(Cond->getOperand(1))) {
int64_t CmpVal = C->getValue().getSExtValue();
@@ -1889,7 +1889,7 @@
// Look for a suitable stride / iv as replacement.
for (unsigned i = 0, e = IU->StrideOrder.size(); i != e; ++i) {
- std::map<SCEVHandle, IVUsersOfOneStride *>::iterator SI =
+ std::map<const SCEV*, IVUsersOfOneStride *>::iterator SI =
IU->IVUsesByStride.find(IU->StrideOrder[i]);
if (!isa<SCEVConstant>(SI->first))
continue;
@@ -1969,7 +1969,7 @@
bool AllUsesAreAddresses = true;
bool AllUsesAreOutsideLoop = true;
std::vector<BasedUser> UsersToProcess;
- SCEVHandle CommonExprs = CollectIVUsers(SI->first, *SI->second, L,
+ const SCEV* CommonExprs = CollectIVUsers(SI->first, *SI->second, L,
AllUsesAreAddresses,
AllUsesAreOutsideLoop,
UsersToProcess);
@@ -2104,13 +2104,13 @@
SelectInst *Sel = dyn_cast<SelectInst>(Cond->getOperand(1));
if (!Sel || !Sel->hasOneUse()) return Cond;
- SCEVHandle BackedgeTakenCount = SE->getBackedgeTakenCount(L);
+ const SCEV* BackedgeTakenCount = SE->getBackedgeTakenCount(L);
if (isa<SCEVCouldNotCompute>(BackedgeTakenCount))
return Cond;
- SCEVHandle One = SE->getIntegerSCEV(1, BackedgeTakenCount->getType());
+ const SCEV* One = SE->getIntegerSCEV(1, BackedgeTakenCount->getType());
// Add one to the backedge-taken count to get the trip count.
- SCEVHandle IterationCount = SE->getAddExpr(BackedgeTakenCount, One);
+ const SCEV* IterationCount = SE->getAddExpr(BackedgeTakenCount, One);
// Check for a max calculation that matches the pattern.
if (!isa<SCEVSMaxExpr>(IterationCount) && !isa<SCEVUMaxExpr>(IterationCount))
@@ -2123,13 +2123,13 @@
if (Max->getNumOperands() != 2)
return Cond;
- SCEVHandle MaxLHS = Max->getOperand(0);
- SCEVHandle MaxRHS = Max->getOperand(1);
+ const SCEV* MaxLHS = Max->getOperand(0);
+ const SCEV* MaxRHS = Max->getOperand(1);
if (!MaxLHS || MaxLHS != One) return Cond;
// Check the relevant induction variable for conformance to
// the pattern.
- SCEVHandle IV = SE->getSCEV(Cond->getOperand(0));
+ const SCEV* IV = SE->getSCEV(Cond->getOperand(0));
const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(IV);
if (!AR || !AR->isAffine() ||
AR->getStart() != One ||
@@ -2175,13 +2175,13 @@
/// inside the loop then try to eliminate the cast opeation.
void LoopStrengthReduce::OptimizeShadowIV(Loop *L) {
- SCEVHandle BackedgeTakenCount = SE->getBackedgeTakenCount(L);
+ const SCEV* BackedgeTakenCount = SE->getBackedgeTakenCount(L);
if (isa<SCEVCouldNotCompute>(BackedgeTakenCount))
return;
for (unsigned Stride = 0, e = IU->StrideOrder.size(); Stride != e;
++Stride) {
- std::map<SCEVHandle, IVUsersOfOneStride *>::iterator SI =
+ std::map<const SCEV*, IVUsersOfOneStride *>::iterator SI =
IU->IVUsesByStride.find(IU->StrideOrder[Stride]);
assert(SI != IU->IVUsesByStride.end() && "Stride doesn't exist!");
if (!isa<SCEVConstant>(SI->first))
@@ -2311,7 +2311,7 @@
// Search IVUsesByStride to find Cond's IVUse if there is one.
IVStrideUse *CondUse = 0;
- const SCEVHandle *CondStride = 0;
+ const SCEV* const *CondStride = 0;
ICmpInst *Cond = cast<ICmpInst>(TermBr->getCondition());
if (!FindIVUserForCond(Cond, CondUse, CondStride))
return; // setcc doesn't use the IV.
@@ -2341,7 +2341,7 @@
int64_t SInt = SC->getValue()->getSExtValue();
for (unsigned NewStride = 0, ee = IU->StrideOrder.size(); NewStride != ee;
++NewStride) {
- std::map<SCEVHandle, IVUsersOfOneStride *>::iterator SI =
+ std::map<const SCEV*, IVUsersOfOneStride *>::iterator SI =
IU->IVUsesByStride.find(IU->StrideOrder[NewStride]);
if (!isa<SCEVConstant>(SI->first) || SI->first == *CondStride)
continue;
@@ -2355,7 +2355,7 @@
bool AllUsesAreAddresses = true;
bool AllUsesAreOutsideLoop = true;
std::vector<BasedUser> UsersToProcess;
- SCEVHandle CommonExprs = CollectIVUsers(SI->first, *SI->second, L,
+ const SCEV* CommonExprs = CollectIVUsers(SI->first, *SI->second, L,
AllUsesAreAddresses,
AllUsesAreOutsideLoop,
UsersToProcess);
@@ -2416,7 +2416,7 @@
void LoopStrengthReduce::OptimizeLoopCountIV(Loop *L) {
// If the number of times the loop is executed isn't computable, give up.
- SCEVHandle BackedgeTakenCount = SE->getBackedgeTakenCount(L);
+ const SCEV* BackedgeTakenCount = SE->getBackedgeTakenCount(L);
if (isa<SCEVCouldNotCompute>(BackedgeTakenCount))
return;
@@ -2445,9 +2445,9 @@
// Handle only tests for equality for the moment, and only stride 1.
if (Cond->getPredicate() != CmpInst::ICMP_EQ)
return;
- SCEVHandle IV = SE->getSCEV(Cond->getOperand(0));
+ const SCEV* IV = SE->getSCEV(Cond->getOperand(0));
const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(IV);
- SCEVHandle One = SE->getIntegerSCEV(1, BackedgeTakenCount->getType());
+ const SCEV* One = SE->getIntegerSCEV(1, BackedgeTakenCount->getType());
if (!AR || !AR->isAffine() || AR->getStepRecurrence(*SE) != One)
return;
// If the RHS of the comparison is defined inside the loop, the rewrite
@@ -2563,7 +2563,7 @@
// strides deterministic - not dependent on map order.
for (unsigned Stride = 0, e = IU->StrideOrder.size();
Stride != e; ++Stride) {
- std::map<SCEVHandle, IVUsersOfOneStride *>::iterator SI =
+ std::map<const SCEV*, IVUsersOfOneStride *>::iterator SI =
IU->IVUsesByStride.find(IU->StrideOrder[Stride]);
assert(SI != IU->IVUsesByStride.end() && "Stride doesn't exist!");
// FIXME: Generalize to non-affine IV's.