#ifndef LLVM_ANALYSIS_SCALAREVOLUTION_EXPANDER_H
#define LLVM_ANALYSIS_SCALAREVOLUTION_EXPANDER_H
-#include "llvm/Instructions.h"
-#include "llvm/Type.h"
-#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionExpressions.h"
+#include "llvm/Support/IRBuilder.h"
+#include "llvm/Support/TargetFolder.h"
namespace llvm {
/// SCEVExpander - This class uses information about analyze scalars to
/// memory.
struct SCEVExpander : public SCEVVisitor<SCEVExpander, Value*> {
ScalarEvolution &SE;
- LoopInfo &LI;
- std::map<SCEVHandle, Value*> InsertedExpressions;
+ std::map<std::pair<const SCEV *, Instruction *>, AssertingVH<Value> >
+ InsertedExpressions;
std::set<Value*> InsertedValues;
- BasicBlock::iterator InsertPt;
+ typedef IRBuilder<true, TargetFolder> BuilderType;
+ BuilderType Builder;
friend struct SCEVVisitor<SCEVExpander, Value*>;
public:
- SCEVExpander(ScalarEvolution &se, LoopInfo &li)
- : SE(se), LI(li) {}
-
- LoopInfo &getLoopInfo() const { return LI; }
+ explicit SCEVExpander(ScalarEvolution &se)
+ : SE(se), Builder(TargetFolder(se.TD, se.getContext())) {}
/// clear - Erase the contents of the InsertedExpressions map so that users
/// trying to expand the same expression into multiple BasicBlocks or
/// different places within the same BasicBlock can do so.
void clear() { InsertedExpressions.clear(); }
- /// isInsertedInstruction - Return true if the specified instruction was
- /// inserted by the code rewriter. If so, the client should not modify the
- /// instruction.
- bool isInsertedInstruction(Instruction *I) const {
- return InsertedValues.count(I);
- }
-
/// getOrInsertCanonicalInductionVariable - This method returns the
/// canonical induction variable of the specified type for the specified
/// loop (inserting one if there is none). A canonical induction variable
/// starts at zero and steps by one on each iteration.
- Value *getOrInsertCanonicalInductionVariable(const Loop *L, const Type *Ty){
- assert(Ty->isInteger() && "Can only insert integer induction variables!");
- SCEVHandle H = SE.getAddRecExpr(SE.getIntegerSCEV(0, Ty),
- SE.getIntegerSCEV(1, Ty), L);
- return expand(H);
- }
-
- /// addInsertedValue - Remember the specified instruction as being the
- /// canonical form for the specified SCEV.
- void addInsertedValue(Value *V, const SCEV *S) {
- InsertedExpressions[S] = V;
- InsertedValues.insert(V);
- }
-
- void setInsertionPoint(BasicBlock::iterator NewIP) { InsertPt = NewIP; }
-
- BasicBlock::iterator getInsertionPoint() const { return InsertPt; }
-
- /// expandCodeFor - Insert code to directly compute the specified SCEV
- /// expression into the program. The inserted code is inserted into the
- /// SCEVExpander's current insertion point.
- Value *expandCodeFor(SCEVHandle SH, const Type *Ty);
+ Value *getOrInsertCanonicalInductionVariable(const Loop *L, const Type *Ty);
/// expandCodeFor - Insert code to directly compute the specified SCEV
/// expression into the program. The inserted code is inserted into the
/// specified block.
- Value *expandCodeFor(SCEVHandle SH, const Type *Ty,
- BasicBlock::iterator IP) {
- setInsertionPoint(IP);
+ Value *expandCodeFor(const SCEV* SH, const Type *Ty, Instruction *IP) {
+ Builder.SetInsertPoint(IP->getParent(), IP);
return expandCodeFor(SH, Ty);
}
- /// InsertCastOfTo - Insert a cast of V to the specified type, doing what
- /// we can to share the casts.
- Value *InsertCastOfTo(Instruction::CastOps opcode, Value *V,
- const Type *Ty);
+ private:
+ LLVMContext *getContext() const { return SE.getContext(); }
+
+ /// InsertBinop - Insert the specified binary operator, doing a small amount
+ /// of work to avoid inserting an obviously redundant operation.
+ Value *InsertBinop(Instruction::BinaryOps Opcode, Value *LHS, Value *RHS);
/// InsertNoopCastOfTo - Insert a cast of V to the specified type,
- /// which must be possible with a noop cast.
+ /// which must be possible with a noop cast, doing what we can to
+ /// share the casts.
Value *InsertNoopCastOfTo(Value *V, const Type *Ty);
- /// InsertBinop - Insert the specified binary operator, doing a small amount
- /// of work to avoid inserting an obviously redundant operation.
- static Value *InsertBinop(Instruction::BinaryOps Opcode, Value *LHS,
- Value *RHS, BasicBlock::iterator InsertPt);
+ /// expandAddToGEP - Expand a SCEVAddExpr with a pointer type into a GEP
+ /// instead of using ptrtoint+arithmetic+inttoptr.
+ Value *expandAddToGEP(const SCEV* const *op_begin,
+ const SCEV* const *op_end,
+ const PointerType *PTy, const Type *Ty, Value *V);
- private:
Value *expand(const SCEV *S);
+ /// expandCodeFor - Insert code to directly compute the specified SCEV
+ /// expression into the program. The inserted code is inserted into the
+ /// SCEVExpander's current insertion point. If a type is specified, the
+ /// result will be expanded to have that type, with a cast if necessary.
+ Value *expandCodeFor(const SCEV* SH, const Type *Ty = 0);
+
+ /// isInsertedInstruction - Return true if the specified instruction was
+ /// inserted by the code rewriter. If so, the client should not modify the
+ /// instruction.
+ bool isInsertedInstruction(Instruction *I) const {
+ return InsertedValues.count(I);
+ }
+
Value *visitConstant(const SCEVConstant *S) {
return S->getValue();
}
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