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-rw-r--r--include/llvm/Analysis/ScalarEvolution.h16
-rw-r--r--include/llvm/Analysis/ScalarEvolutionExpressions.h49
-rw-r--r--lib/Analysis/ScalarEvolution.cpp176
-rw-r--r--test/Analysis/ScalarEvolution/2008-07-29-SMinExpr.ll2
4 files changed, 78 insertions, 165 deletions
diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h
index 00b95c9..7bfd0ce 100644
--- a/include/llvm/Analysis/ScalarEvolution.h
+++ b/include/llvm/Analysis/ScalarEvolution.h
@@ -54,6 +54,10 @@ namespace llvm {
/// The ScalarEvolution's BumpPtrAllocator holds the data.
FoldingSetNodeIDRef FastID;
+ /// AllocationSequenceNumber - This is used as a deterministic tie
+ /// breaker when sorting SCEVs.
+ unsigned AllocationSequenceNumber;
+
// The SCEV baseclass this node corresponds to
const unsigned short SCEVType;
@@ -68,11 +72,18 @@ namespace llvm {
protected:
virtual ~SCEV();
public:
- explicit SCEV(const FoldingSetNodeIDRef ID, unsigned SCEVTy) :
- FastID(ID), SCEVType(SCEVTy), SubclassData(0) {}
+ explicit SCEV(const FoldingSetNodeIDRef ID, unsigned num, unsigned SCEVTy) :
+ FastID(ID), AllocationSequenceNumber(num),
+ SCEVType(SCEVTy), SubclassData(0) {}
unsigned getSCEVType() const { return SCEVType; }
+ /// getAllocationSequenceNumber - Return an arbitrary value which can be
+ /// used to deterministically order a sequence of SCEVs.
+ unsigned getAllocationSequenceNumber() const {
+ return AllocationSequenceNumber;
+ }
+
/// Profile - FoldingSet support.
void Profile(FoldingSetNodeID& ID) { ID = FastID; }
@@ -663,6 +674,7 @@ namespace llvm {
private:
FoldingSet<SCEV> UniqueSCEVs;
BumpPtrAllocator SCEVAllocator;
+ unsigned CurAllocationSequenceNumber;
};
}
diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index 7424203..2e4fd7e 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -37,8 +37,8 @@ namespace llvm {
friend class ScalarEvolution;
ConstantInt *V;
- SCEVConstant(const FoldingSetNodeIDRef ID, ConstantInt *v) :
- SCEV(ID, scConstant), V(v) {}
+ SCEVConstant(const FoldingSetNodeIDRef ID, unsigned Num, ConstantInt *v)
+ : SCEV(ID, Num, scConstant), V(v) {}
public:
ConstantInt *getValue() const { return V; }
@@ -81,7 +81,7 @@ namespace llvm {
const SCEV *Op;
const Type *Ty;
- SCEVCastExpr(const FoldingSetNodeIDRef ID,
+ SCEVCastExpr(const FoldingSetNodeIDRef ID, unsigned Num,
unsigned SCEVTy, const SCEV *op, const Type *ty);
public:
@@ -120,7 +120,7 @@ namespace llvm {
class SCEVTruncateExpr : public SCEVCastExpr {
friend class ScalarEvolution;
- SCEVTruncateExpr(const FoldingSetNodeIDRef ID,
+ SCEVTruncateExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *op, const Type *ty);
public:
@@ -140,7 +140,7 @@ namespace llvm {
class SCEVZeroExtendExpr : public SCEVCastExpr {
friend class ScalarEvolution;
- SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID,
+ SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *op, const Type *ty);
public:
@@ -160,7 +160,7 @@ namespace llvm {
class SCEVSignExtendExpr : public SCEVCastExpr {
friend class ScalarEvolution;
- SCEVSignExtendExpr(const FoldingSetNodeIDRef ID,
+ SCEVSignExtendExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *op, const Type *ty);
public:
@@ -187,9 +187,9 @@ namespace llvm {
const SCEV *const *Operands;
size_t NumOperands;
- SCEVNAryExpr(const FoldingSetNodeIDRef ID,
+ SCEVNAryExpr(const FoldingSetNodeIDRef ID, unsigned Num,
enum SCEVTypes T, const SCEV *const *O, size_t N)
- : SCEV(ID, T), Operands(O), NumOperands(N) {}
+ : SCEV(ID, Num, T), Operands(O), NumOperands(N) {}
public:
size_t getNumOperands() const { return NumOperands; }
@@ -262,9 +262,9 @@ namespace llvm {
///
class SCEVCommutativeExpr : public SCEVNAryExpr {
protected:
- SCEVCommutativeExpr(const FoldingSetNodeIDRef ID,
+ SCEVCommutativeExpr(const FoldingSetNodeIDRef ID, unsigned Num,
enum SCEVTypes T, const SCEV *const *O, size_t N)
- : SCEVNAryExpr(ID, T, O, N) {}
+ : SCEVNAryExpr(ID, Num, T, O, N) {}
public:
virtual const char *getOperationStr() const = 0;
@@ -288,9 +288,9 @@ namespace llvm {
class SCEVAddExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- SCEVAddExpr(const FoldingSetNodeIDRef ID,
+ SCEVAddExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *const *O, size_t N)
- : SCEVCommutativeExpr(ID, scAddExpr, O, N) {
+ : SCEVCommutativeExpr(ID, Num, scAddExpr, O, N) {
}
public:
@@ -316,9 +316,9 @@ namespace llvm {
class SCEVMulExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- SCEVMulExpr(const FoldingSetNodeIDRef ID,
+ SCEVMulExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *const *O, size_t N)
- : SCEVCommutativeExpr(ID, scMulExpr, O, N) {
+ : SCEVCommutativeExpr(ID, Num, scMulExpr, O, N) {
}
public:
@@ -340,8 +340,9 @@ namespace llvm {
const SCEV *LHS;
const SCEV *RHS;
- SCEVUDivExpr(const FoldingSetNodeIDRef ID, const SCEV *lhs, const SCEV *rhs)
- : SCEV(ID, scUDivExpr), LHS(lhs), RHS(rhs) {}
+ SCEVUDivExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+ const SCEV *lhs, const SCEV *rhs)
+ : SCEV(ID, Num, scUDivExpr), LHS(lhs), RHS(rhs) {}
public:
const SCEV *getLHS() const { return LHS; }
@@ -390,9 +391,9 @@ namespace llvm {
const Loop *L;
- SCEVAddRecExpr(const FoldingSetNodeIDRef ID,
+ SCEVAddRecExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *const *O, size_t N, const Loop *l)
- : SCEVNAryExpr(ID, scAddRecExpr, O, N), L(l) {
+ : SCEVNAryExpr(ID, Num, scAddRecExpr, O, N), L(l) {
for (size_t i = 0, e = NumOperands; i != e; ++i)
assert(Operands[i]->isLoopInvariant(l) &&
"Operands of AddRec must be loop-invariant!");
@@ -472,9 +473,9 @@ namespace llvm {
class SCEVSMaxExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- SCEVSMaxExpr(const FoldingSetNodeIDRef ID,
+ SCEVSMaxExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *const *O, size_t N)
- : SCEVCommutativeExpr(ID, scSMaxExpr, O, N) {
+ : SCEVCommutativeExpr(ID, Num, scSMaxExpr, O, N) {
// Max never overflows.
setHasNoUnsignedWrap(true);
setHasNoSignedWrap(true);
@@ -497,9 +498,9 @@ namespace llvm {
class SCEVUMaxExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- SCEVUMaxExpr(const FoldingSetNodeIDRef ID,
+ SCEVUMaxExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *const *O, size_t N)
- : SCEVCommutativeExpr(ID, scUMaxExpr, O, N) {
+ : SCEVCommutativeExpr(ID, Num, scUMaxExpr, O, N) {
// Max never overflows.
setHasNoUnsignedWrap(true);
setHasNoSignedWrap(true);
@@ -524,8 +525,8 @@ namespace llvm {
friend class ScalarEvolution;
Value *V;
- SCEVUnknown(const FoldingSetNodeIDRef ID, Value *v) :
- SCEV(ID, scUnknown), V(v) {}
+ SCEVUnknown(const FoldingSetNodeIDRef ID, unsigned Num, Value *v)
+ : SCEV(ID, Num, scUnknown), V(v) {}
public:
Value *getValue() const { return V; }
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 7e7fc75..8a653fe 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -141,7 +141,7 @@ bool SCEV::isAllOnesValue() const {
}
SCEVCouldNotCompute::SCEVCouldNotCompute() :
- SCEV(FoldingSetNodeIDRef(), scCouldNotCompute) {}
+ SCEV(FoldingSetNodeIDRef(), 0, scCouldNotCompute) {}
bool SCEVCouldNotCompute::isLoopInvariant(const Loop *L) const {
llvm_unreachable("Attempt to use a SCEVCouldNotCompute object!");
@@ -177,7 +177,9 @@ const SCEV *ScalarEvolution::getConstant(ConstantInt *V) {
ID.AddPointer(V);
void *IP = 0;
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) return S;
- SCEV *S = new (SCEVAllocator) SCEVConstant(ID.Intern(SCEVAllocator), V);
+ SCEV *S = new (SCEVAllocator) SCEVConstant(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
+ V);
UniqueSCEVs.InsertNode(S, IP);
return S;
}
@@ -198,9 +200,9 @@ void SCEVConstant::print(raw_ostream &OS) const {
WriteAsOperand(OS, V, false);
}
-SCEVCastExpr::SCEVCastExpr(const FoldingSetNodeIDRef ID,
+SCEVCastExpr::SCEVCastExpr(const FoldingSetNodeIDRef ID, unsigned Num,
unsigned SCEVTy, const SCEV *op, const Type *ty)
- : SCEV(ID, SCEVTy), Op(op), Ty(ty) {}
+ : SCEV(ID, Num, SCEVTy), Op(op), Ty(ty) {}
bool SCEVCastExpr::dominates(BasicBlock *BB, DominatorTree *DT) const {
return Op->dominates(BB, DT);
@@ -210,9 +212,9 @@ bool SCEVCastExpr::properlyDominates(BasicBlock *BB, DominatorTree *DT) const {
return Op->properlyDominates(BB, DT);
}
-SCEVTruncateExpr::SCEVTruncateExpr(const FoldingSetNodeIDRef ID,
+SCEVTruncateExpr::SCEVTruncateExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *op, const Type *ty)
- : SCEVCastExpr(ID, scTruncate, op, ty) {
+ : SCEVCastExpr(ID, Num, scTruncate, op, ty) {
assert((Op->getType()->isIntegerTy() || Op->getType()->isPointerTy()) &&
(Ty->isIntegerTy() || Ty->isPointerTy()) &&
"Cannot truncate non-integer value!");
@@ -222,9 +224,9 @@ void SCEVTruncateExpr::print(raw_ostream &OS) const {
OS << "(trunc " << *Op->getType() << " " << *Op << " to " << *Ty << ")";
}
-SCEVZeroExtendExpr::SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID,
+SCEVZeroExtendExpr::SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *op, const Type *ty)
- : SCEVCastExpr(ID, scZeroExtend, op, ty) {
+ : SCEVCastExpr(ID, Num, scZeroExtend, op, ty) {
assert((Op->getType()->isIntegerTy() || Op->getType()->isPointerTy()) &&
(Ty->isIntegerTy() || Ty->isPointerTy()) &&
"Cannot zero extend non-integer value!");
@@ -234,9 +236,9 @@ void SCEVZeroExtendExpr::print(raw_ostream &OS) const {
OS << "(zext " << *Op->getType() << " " << *Op << " to " << *Ty << ")";
}
-SCEVSignExtendExpr::SCEVSignExtendExpr(const FoldingSetNodeIDRef ID,
+SCEVSignExtendExpr::SCEVSignExtendExpr(const FoldingSetNodeIDRef ID, unsigned Num,
const SCEV *op, const Type *ty)
- : SCEVCastExpr(ID, scSignExtend, op, ty) {
+ : SCEVCastExpr(ID, Num, scSignExtend, op, ty) {
assert((Op->getType()->isIntegerTy() || Op->getType()->isPointerTy()) &&
(Ty->isIntegerTy() || Ty->isPointerTy()) &&
"Cannot sign extend non-integer value!");
@@ -505,109 +507,14 @@ namespace {
return false;
// Primarily, sort the SCEVs by their getSCEVType().
- if (LHS->getSCEVType() != RHS->getSCEVType())
- return LHS->getSCEVType() < RHS->getSCEVType();
-
- // Aside from the getSCEVType() ordering, the particular ordering
- // isn't very important except that it's beneficial to be consistent,
- // so that (a + b) and (b + a) don't end up as different expressions.
-
- // Sort SCEVUnknown values with some loose heuristics. TODO: This is
- // not as complete as it could be.
- if (const SCEVUnknown *LU = dyn_cast<SCEVUnknown>(LHS)) {
- const SCEVUnknown *RU = cast<SCEVUnknown>(RHS);
-
- // Order pointer values after integer values. This helps SCEVExpander
- // form GEPs.
- if (LU->getType()->isPointerTy() && !RU->getType()->isPointerTy())
- return false;
- if (RU->getType()->isPointerTy() && !LU->getType()->isPointerTy())
- return true;
-
- // Compare getValueID values.
- if (LU->getValue()->getValueID() != RU->getValue()->getValueID())
- return LU->getValue()->getValueID() < RU->getValue()->getValueID();
-
- // Sort arguments by their position.
- if (const Argument *LA = dyn_cast<Argument>(LU->getValue())) {
- const Argument *RA = cast<Argument>(RU->getValue());
- return LA->getArgNo() < RA->getArgNo();
- }
-
- // For instructions, compare their loop depth, and their opcode.
- // This is pretty loose.
- if (Instruction *LV = dyn_cast<Instruction>(LU->getValue())) {
- Instruction *RV = cast<Instruction>(RU->getValue());
-
- // Compare loop depths.
- if (LI->getLoopDepth(LV->getParent()) !=
- LI->getLoopDepth(RV->getParent()))
- return LI->getLoopDepth(LV->getParent()) <
- LI->getLoopDepth(RV->getParent());
-
- // Compare opcodes.
- if (LV->getOpcode() != RV->getOpcode())
- return LV->getOpcode() < RV->getOpcode();
-
- // Compare the number of operands.
- if (LV->getNumOperands() != RV->getNumOperands())
- return LV->getNumOperands() < RV->getNumOperands();
- }
-
- return false;
- }
-
- // Compare constant values.
- if (const SCEVConstant *LC = dyn_cast<SCEVConstant>(LHS)) {
- const SCEVConstant *RC = cast<SCEVConstant>(RHS);
- if (LC->getValue()->getBitWidth() != RC->getValue()->getBitWidth())
- return LC->getValue()->getBitWidth() < RC->getValue()->getBitWidth();
- return LC->getValue()->getValue().ult(RC->getValue()->getValue());
- }
-
- // Compare addrec loop depths.
- if (const SCEVAddRecExpr *LA = dyn_cast<SCEVAddRecExpr>(LHS)) {
- const SCEVAddRecExpr *RA = cast<SCEVAddRecExpr>(RHS);
- if (LA->getLoop()->getLoopDepth() != RA->getLoop()->getLoopDepth())
- return LA->getLoop()->getLoopDepth() < RA->getLoop()->getLoopDepth();
- }
-
- // Lexicographically compare n-ary expressions.
- if (const SCEVNAryExpr *LC = dyn_cast<SCEVNAryExpr>(LHS)) {
- const SCEVNAryExpr *RC = cast<SCEVNAryExpr>(RHS);
- for (unsigned i = 0, e = LC->getNumOperands(); i != e; ++i) {
- if (i >= RC->getNumOperands())
- return false;
- if (operator()(LC->getOperand(i), RC->getOperand(i)))
- return true;
- if (operator()(RC->getOperand(i), LC->getOperand(i)))
- return false;
- }
- return LC->getNumOperands() < RC->getNumOperands();
- }
-
- // Lexicographically compare udiv expressions.
- if (const SCEVUDivExpr *LC = dyn_cast<SCEVUDivExpr>(LHS)) {
- const SCEVUDivExpr *RC = cast<SCEVUDivExpr>(RHS);
- if (operator()(LC->getLHS(), RC->getLHS()))
- return true;
- if (operator()(RC->getLHS(), LC->getLHS()))
- return false;
- if (operator()(LC->getRHS(), RC->getRHS()))
- return true;
- if (operator()(RC->getRHS(), LC->getRHS()))
- return false;
- return false;
- }
-
- // Compare cast expressions by operand.
- if (const SCEVCastExpr *LC = dyn_cast<SCEVCastExpr>(LHS)) {
- const SCEVCastExpr *RC = cast<SCEVCastExpr>(RHS);
- return operator()(LC->getOperand(), RC->getOperand());
- }
-
- llvm_unreachable("Unknown SCEV kind!");
- return false;
+ unsigned LST = LHS->getSCEVType();
+ unsigned RST = RHS->getSCEVType();
+ if (LST != RST)
+ return LST < RST;
+
+ // Then, pick an arbitrary deterministic sort.
+ return LHS->getAllocationSequenceNumber() <
+ RHS->getAllocationSequenceNumber();
}
};
}
@@ -625,36 +532,18 @@ namespace {
static void GroupByComplexity(SmallVectorImpl<const SCEV *> &Ops,
LoopInfo *LI) {
if (Ops.size() < 2) return; // Noop
+
+ SCEVComplexityCompare Comp(LI);
+
if (Ops.size() == 2) {
// This is the common case, which also happens to be trivially simple.
// Special case it.
- if (SCEVComplexityCompare(LI)(Ops[1], Ops[0]))
+ if (Comp(Ops[1], Ops[0]))
std::swap(Ops[0], Ops[1]);
return;
}
- // Do the rough sort by complexity.
- std::stable_sort(Ops.begin(), Ops.end(), SCEVComplexityCompare(LI));
-
- // Now that we are sorted by complexity, group elements of the same
- // complexity. Note that this is, at worst, N^2, but the vector is likely to
- // be extremely short in practice. Note that we take this approach because we
- // do not want to depend on the addresses of the objects we are grouping.
- for (unsigned i = 0, e = Ops.size(); i != e-2; ++i) {
- const SCEV *S = Ops[i];
- unsigned Complexity = S->getSCEVType();
-
- // If there are any objects of the same complexity and same value as this
- // one, group them.
- for (unsigned j = i+1; j != e && Ops[j]->getSCEVType() == Complexity; ++j) {
- if (Ops[j] == S) { // Found a duplicate.
- // Move it to immediately after i'th element.
- std::swap(Ops[i+1], Ops[j]);
- ++i; // no need to rescan it.
- if (i == e-2) return; // Done!
- }
- }
- }
+ std::stable_sort(Ops.begin(), Ops.end(), Comp);
}
@@ -848,6 +737,7 @@ const SCEV *ScalarEvolution::getTruncateExpr(const SCEV *Op,
// Recompute the insert position, as it may have been invalidated.
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) return S;
SCEV *S = new (SCEVAllocator) SCEVTruncateExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
Op, Ty);
UniqueSCEVs.InsertNode(S, IP);
return S;
@@ -983,6 +873,7 @@ const SCEV *ScalarEvolution::getZeroExtendExpr(const SCEV *Op,
// Recompute the insert position, as it may have been invalidated.
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) return S;
SCEV *S = new (SCEVAllocator) SCEVZeroExtendExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
Op, Ty);
UniqueSCEVs.InsertNode(S, IP);
return S;
@@ -1118,6 +1009,7 @@ const SCEV *ScalarEvolution::getSignExtendExpr(const SCEV *Op,
// Recompute the insert position, as it may have been invalidated.
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) return S;
SCEV *S = new (SCEVAllocator) SCEVSignExtendExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
Op, Ty);
UniqueSCEVs.InsertNode(S, IP);
return S;
@@ -1619,6 +1511,7 @@ const SCEV *ScalarEvolution::getAddExpr(SmallVectorImpl<const SCEV *> &Ops,
const SCEV **O = SCEVAllocator.Allocate<const SCEV *>(Ops.size());
std::uninitialized_copy(Ops.begin(), Ops.end(), O);
S = new (SCEVAllocator) SCEVAddExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
O, Ops.size());
UniqueSCEVs.InsertNode(S, IP);
}
@@ -1821,6 +1714,7 @@ const SCEV *ScalarEvolution::getMulExpr(SmallVectorImpl<const SCEV *> &Ops,
const SCEV **O = SCEVAllocator.Allocate<const SCEV *>(Ops.size());
std::uninitialized_copy(Ops.begin(), Ops.end(), O);
S = new (SCEVAllocator) SCEVMulExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
O, Ops.size());
UniqueSCEVs.InsertNode(S, IP);
}
@@ -1925,6 +1819,7 @@ const SCEV *ScalarEvolution::getUDivExpr(const SCEV *LHS,
void *IP = 0;
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) return S;
SCEV *S = new (SCEVAllocator) SCEVUDivExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
LHS, RHS);
UniqueSCEVs.InsertNode(S, IP);
return S;
@@ -2036,6 +1931,7 @@ ScalarEvolution::getAddRecExpr(SmallVectorImpl<const SCEV *> &Operands,
const SCEV **O = SCEVAllocator.Allocate<const SCEV *>(Operands.size());
std::uninitialized_copy(Operands.begin(), Operands.end(), O);
S = new (SCEVAllocator) SCEVAddRecExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
O, Operands.size(), L);
UniqueSCEVs.InsertNode(S, IP);
}
@@ -2144,6 +2040,7 @@ ScalarEvolution::getSMaxExpr(SmallVectorImpl<const SCEV *> &Ops) {
const SCEV **O = SCEVAllocator.Allocate<const SCEV *>(Ops.size());
std::uninitialized_copy(Ops.begin(), Ops.end(), O);
SCEV *S = new (SCEVAllocator) SCEVSMaxExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
O, Ops.size());
UniqueSCEVs.InsertNode(S, IP);
return S;
@@ -2249,6 +2146,7 @@ ScalarEvolution::getUMaxExpr(SmallVectorImpl<const SCEV *> &Ops) {
const SCEV **O = SCEVAllocator.Allocate<const SCEV *>(Ops.size());
std::uninitialized_copy(Ops.begin(), Ops.end(), O);
SCEV *S = new (SCEVAllocator) SCEVUMaxExpr(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
O, Ops.size());
UniqueSCEVs.InsertNode(S, IP);
return S;
@@ -2329,7 +2227,9 @@ const SCEV *ScalarEvolution::getUnknown(Value *V) {
ID.AddPointer(V);
void *IP = 0;
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) return S;
- SCEV *S = new (SCEVAllocator) SCEVUnknown(ID.Intern(SCEVAllocator), V);
+ SCEV *S = new (SCEVAllocator) SCEVUnknown(ID.Intern(SCEVAllocator),
+ CurAllocationSequenceNumber++,
+ V);
UniqueSCEVs.InsertNode(S, IP);
return S;
}
@@ -5682,7 +5582,7 @@ ScalarEvolution::SCEVCallbackVH::SCEVCallbackVH(Value *V, ScalarEvolution *se)
//===----------------------------------------------------------------------===//
ScalarEvolution::ScalarEvolution()
- : FunctionPass(&ID) {
+ : FunctionPass(&ID), CurAllocationSequenceNumber(0) {
}
bool ScalarEvolution::runOnFunction(Function &F) {
diff --git a/test/Analysis/ScalarEvolution/2008-07-29-SMinExpr.ll b/test/Analysis/ScalarEvolution/2008-07-29-SMinExpr.ll
index 3542ad2..cba20ee 100644
--- a/test/Analysis/ScalarEvolution/2008-07-29-SMinExpr.ll
+++ b/test/Analysis/ScalarEvolution/2008-07-29-SMinExpr.ll
@@ -22,5 +22,5 @@ afterfor: ; preds = %forinc, %entry
ret i32 %j.0.lcssa
}
-; CHECK: backedge-taken count is (-2147483632 + ((-1 + (-1 * %{{[xy]}})) smax (-1 + (-1 * %{{[xy]}}))))
+; CHECK: backedge-taken count is (-2147483632 + ((-1 + (-1 * %y)) smax (-1 + (-1 * %x))))
generated by cgit v1.1 at 2024-12-26 05:25:33 +0000