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-rw-r--r--include/llvm/Analysis/ScalarEvolutionExpressions.h149
1 files changed, 51 insertions, 98 deletions
diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index da24de281d47..16992680577c 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -43,6 +43,7 @@ namespace llvm {
SCEV(ID, scConstant), V(v) {}
public:
ConstantInt *getValue() const { return V; }
+ const APInt &getAPInt() const { return getValue()->getValue(); }
Type *getType() const { return V->getType(); }
@@ -404,7 +405,7 @@ namespace llvm {
/// value, and only represent it as its LLVM Value. This is the "bottom"
/// value for the analysis.
///
- class SCEVUnknown : public SCEV, private CallbackVH {
+ class SCEVUnknown final : public SCEV, private CallbackVH {
friend class ScalarEvolution;
// Implement CallbackVH.
@@ -553,64 +554,56 @@ namespace llvm {
T.visitAll(Root);
}
- typedef DenseMap<const Value*, Value*> ValueToValueMap;
-
- /// The SCEVParameterRewriter takes a scalar evolution expression and updates
- /// the SCEVUnknown components following the Map (Value -> Value).
- struct SCEVParameterRewriter
- : public SCEVVisitor<SCEVParameterRewriter, const SCEV*> {
+ /// Recursively visits a SCEV expression and re-writes it.
+ template<typename SC>
+ class SCEVRewriteVisitor : public SCEVVisitor<SC, const SCEV *> {
+ protected:
+ ScalarEvolution &SE;
public:
- static const SCEV *rewrite(const SCEV *Scev, ScalarEvolution &SE,
- ValueToValueMap &Map,
- bool InterpretConsts = false) {
- SCEVParameterRewriter Rewriter(SE, Map, InterpretConsts);
- return Rewriter.visit(Scev);
- }
-
- SCEVParameterRewriter(ScalarEvolution &S, ValueToValueMap &M, bool C)
- : SE(S), Map(M), InterpretConsts(C) {}
+ SCEVRewriteVisitor(ScalarEvolution &SE) : SE(SE) {}
const SCEV *visitConstant(const SCEVConstant *Constant) {
return Constant;
}
const SCEV *visitTruncateExpr(const SCEVTruncateExpr *Expr) {
- const SCEV *Operand = visit(Expr->getOperand());
+ const SCEV *Operand = ((SC*)this)->visit(Expr->getOperand());
return SE.getTruncateExpr(Operand, Expr->getType());
}
const SCEV *visitZeroExtendExpr(const SCEVZeroExtendExpr *Expr) {
- const SCEV *Operand = visit(Expr->getOperand());
+ const SCEV *Operand = ((SC*)this)->visit(Expr->getOperand());
return SE.getZeroExtendExpr(Operand, Expr->getType());
}
const SCEV *visitSignExtendExpr(const SCEVSignExtendExpr *Expr) {
- const SCEV *Operand = visit(Expr->getOperand());
+ const SCEV *Operand = ((SC*)this)->visit(Expr->getOperand());
return SE.getSignExtendExpr(Operand, Expr->getType());
}
const SCEV *visitAddExpr(const SCEVAddExpr *Expr) {
SmallVector<const SCEV *, 2> Operands;
for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
+ Operands.push_back(((SC*)this)->visit(Expr->getOperand(i)));
return SE.getAddExpr(Operands);
}
const SCEV *visitMulExpr(const SCEVMulExpr *Expr) {
SmallVector<const SCEV *, 2> Operands;
for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
+ Operands.push_back(((SC*)this)->visit(Expr->getOperand(i)));
return SE.getMulExpr(Operands);
}
const SCEV *visitUDivExpr(const SCEVUDivExpr *Expr) {
- return SE.getUDivExpr(visit(Expr->getLHS()), visit(Expr->getRHS()));
+ return SE.getUDivExpr(((SC*)this)->visit(Expr->getLHS()),
+ ((SC*)this)->visit(Expr->getRHS()));
}
const SCEV *visitAddRecExpr(const SCEVAddRecExpr *Expr) {
SmallVector<const SCEV *, 2> Operands;
for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
+ Operands.push_back(((SC*)this)->visit(Expr->getOperand(i)));
return SE.getAddRecExpr(Operands, Expr->getLoop(),
Expr->getNoWrapFlags());
}
@@ -618,18 +611,43 @@ namespace llvm {
const SCEV *visitSMaxExpr(const SCEVSMaxExpr *Expr) {
SmallVector<const SCEV *, 2> Operands;
for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
+ Operands.push_back(((SC*)this)->visit(Expr->getOperand(i)));
return SE.getSMaxExpr(Operands);
}
const SCEV *visitUMaxExpr(const SCEVUMaxExpr *Expr) {
SmallVector<const SCEV *, 2> Operands;
for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
+ Operands.push_back(((SC*)this)->visit(Expr->getOperand(i)));
return SE.getUMaxExpr(Operands);
}
const SCEV *visitUnknown(const SCEVUnknown *Expr) {
+ return Expr;
+ }
+
+ const SCEV *visitCouldNotCompute(const SCEVCouldNotCompute *Expr) {
+ return Expr;
+ }
+ };
+
+ typedef DenseMap<const Value*, Value*> ValueToValueMap;
+
+ /// The SCEVParameterRewriter takes a scalar evolution expression and updates
+ /// the SCEVUnknown components following the Map (Value -> Value).
+ class SCEVParameterRewriter : public SCEVRewriteVisitor<SCEVParameterRewriter> {
+ public:
+ static const SCEV *rewrite(const SCEV *Scev, ScalarEvolution &SE,
+ ValueToValueMap &Map,
+ bool InterpretConsts = false) {
+ SCEVParameterRewriter Rewriter(SE, Map, InterpretConsts);
+ return Rewriter.visit(Scev);
+ }
+
+ SCEVParameterRewriter(ScalarEvolution &SE, ValueToValueMap &M, bool C)
+ : SCEVRewriteVisitor(SE), Map(M), InterpretConsts(C) {}
+
+ const SCEV *visitUnknown(const SCEVUnknown *Expr) {
Value *V = Expr->getValue();
if (Map.count(V)) {
Value *NV = Map[V];
@@ -640,68 +658,26 @@ namespace llvm {
return Expr;
}
- const SCEV *visitCouldNotCompute(const SCEVCouldNotCompute *Expr) {
- return Expr;
- }
-
private:
- ScalarEvolution &SE;
ValueToValueMap &Map;
bool InterpretConsts;
};
typedef DenseMap<const Loop*, const SCEV*> LoopToScevMapT;
- /// The SCEVApplyRewriter takes a scalar evolution expression and applies
+ /// The SCEVLoopAddRecRewriter takes a scalar evolution expression and applies
/// the Map (Loop -> SCEV) to all AddRecExprs.
- struct SCEVApplyRewriter
- : public SCEVVisitor<SCEVApplyRewriter, const SCEV*> {
+ class SCEVLoopAddRecRewriter
+ : public SCEVRewriteVisitor<SCEVLoopAddRecRewriter> {
public:
static const SCEV *rewrite(const SCEV *Scev, LoopToScevMapT &Map,
ScalarEvolution &SE) {
- SCEVApplyRewriter Rewriter(SE, Map);
+ SCEVLoopAddRecRewriter Rewriter(SE, Map);
return Rewriter.visit(Scev);
}
- SCEVApplyRewriter(ScalarEvolution &S, LoopToScevMapT &M)
- : SE(S), Map(M) {}
-
- const SCEV *visitConstant(const SCEVConstant *Constant) {
- return Constant;
- }
-
- const SCEV *visitTruncateExpr(const SCEVTruncateExpr *Expr) {
- const SCEV *Operand = visit(Expr->getOperand());
- return SE.getTruncateExpr(Operand, Expr->getType());
- }
-
- const SCEV *visitZeroExtendExpr(const SCEVZeroExtendExpr *Expr) {
- const SCEV *Operand = visit(Expr->getOperand());
- return SE.getZeroExtendExpr(Operand, Expr->getType());
- }
-
- const SCEV *visitSignExtendExpr(const SCEVSignExtendExpr *Expr) {
- const SCEV *Operand = visit(Expr->getOperand());
- return SE.getSignExtendExpr(Operand, Expr->getType());
- }
-
- const SCEV *visitAddExpr(const SCEVAddExpr *Expr) {
- SmallVector<const SCEV *, 2> Operands;
- for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
- return SE.getAddExpr(Operands);
- }
-
- const SCEV *visitMulExpr(const SCEVMulExpr *Expr) {
- SmallVector<const SCEV *, 2> Operands;
- for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
- return SE.getMulExpr(Operands);
- }
-
- const SCEV *visitUDivExpr(const SCEVUDivExpr *Expr) {
- return SE.getUDivExpr(visit(Expr->getLHS()), visit(Expr->getRHS()));
- }
+ SCEVLoopAddRecRewriter(ScalarEvolution &SE, LoopToScevMapT &M)
+ : SCEVRewriteVisitor(SE), Map(M) {}
const SCEV *visitAddRecExpr(const SCEVAddRecExpr *Expr) {
SmallVector<const SCEV *, 2> Operands;
@@ -714,41 +690,18 @@ namespace llvm {
if (0 == Map.count(L))
return Res;
- const SCEVAddRecExpr *Rec = (const SCEVAddRecExpr *) Res;
+ const SCEVAddRecExpr *Rec = cast<SCEVAddRecExpr>(Res);
return Rec->evaluateAtIteration(Map[L], SE);
}
- const SCEV *visitSMaxExpr(const SCEVSMaxExpr *Expr) {
- SmallVector<const SCEV *, 2> Operands;
- for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
- return SE.getSMaxExpr(Operands);
- }
-
- const SCEV *visitUMaxExpr(const SCEVUMaxExpr *Expr) {
- SmallVector<const SCEV *, 2> Operands;
- for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
- Operands.push_back(visit(Expr->getOperand(i)));
- return SE.getUMaxExpr(Operands);
- }
-
- const SCEV *visitUnknown(const SCEVUnknown *Expr) {
- return Expr;
- }
-
- const SCEV *visitCouldNotCompute(const SCEVCouldNotCompute *Expr) {
- return Expr;
- }
-
private:
- ScalarEvolution &SE;
LoopToScevMapT &Map;
};
/// Applies the Map (Loop -> SCEV) to the given Scev.
static inline const SCEV *apply(const SCEV *Scev, LoopToScevMapT &Map,
ScalarEvolution &SE) {
- return SCEVApplyRewriter::rewrite(Scev, Map, SE);
+ return SCEVLoopAddRecRewriter::rewrite(Scev, Map, SE);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 11:07:19 +0000