/// memory.
struct SCEVExpander : public SCEVVisitor<SCEVExpander, Value*> {
ScalarEvolution &SE;
- LoopInfo &LI;
- std::map<SCEVHandle, Value*> InsertedExpressions;
+ std::map<const SCEV*, AssertingVH<Value> > InsertedExpressions;
std::set<Value*> InsertedValues;
BasicBlock::iterator InsertPt;
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) {}
/// clear - Erase the contents of the InsertedExpressions map so that users
/// trying to expand the same expression into multiple BasicBlocks or
/// 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);
- }
+ Value *getOrInsertCanonicalInductionVariable(const Loop *L, const Type *Ty);
/// addInsertedValue - Remember the specified instruction as being the
/// canonical form for the specified SCEV.
/// 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);
+ /// 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);
/// 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,
+ Value *expandCodeFor(const SCEV* SH, const Type *Ty,
BasicBlock::iterator IP) {
setInsertionPoint(IP);
return expandCodeFor(SH, Ty);
Value *RHS, BasicBlock::iterator InsertPt);
private:
+ /// 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);
+
Value *expand(const SCEV *S);
Value *visitConstant(const SCEVConstant *S) {