-//===- InstCombine.h - Main InstCombine pass definition -------------------===//
+//===- InstCombine.h - Main InstCombine pass definition ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
#define INSTCOMBINE_INSTCOMBINE_H
#include "InstCombineWorklist.h"
-#include "llvm/IRBuilder.h"
-#include "llvm/IntrinsicInst.h"
-#include "llvm/Operator.h"
-#include "llvm/Pass.h"
#include "llvm/Analysis/ValueTracking.h"
-#include "llvm/Support/InstVisitor.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Operator.h"
+#include "llvm/InstVisitor.h"
+#include "llvm/Pass.h"
#include "llvm/Support/TargetFolder.h"
+#include "llvm/Transforms/Utils/SimplifyLibCalls.h"
namespace llvm {
class CallSite;
class DbgDeclareInst;
class MemIntrinsic;
class MemSetInst;
-
+
/// SelectPatternFlavor - We can match a variety of different patterns for
/// select operations.
enum SelectPatternFlavor {
SPF_SMAX, SPF_UMAX
//SPF_ABS - TODO.
};
-
+
/// getComplexity: Assign a complexity or rank value to LLVM Values...
/// 0 -> undef, 1 -> Const, 2 -> Other, 3 -> Arg, 3 -> Unary, 4 -> OtherInst
static inline unsigned getComplexity(Value *V) {
return isa<Constant>(V) ? (isa<UndefValue>(V) ? 0 : 1) : 2;
}
-
+
/// InstCombineIRInserter - This is an IRBuilder insertion helper that works
/// just like the normal insertion helper, but also adds any new instructions
/// to the instcombine worklist.
-class LLVM_LIBRARY_VISIBILITY InstCombineIRInserter
+class LLVM_LIBRARY_VISIBILITY InstCombineIRInserter
: public IRBuilderDefaultInserter<true> {
InstCombineWorklist &Worklist;
public:
InstCombineIRInserter(InstCombineWorklist &WL) : Worklist(WL) {}
-
+
void InsertHelper(Instruction *I, const Twine &Name,
BasicBlock *BB, BasicBlock::iterator InsertPt) const {
IRBuilderDefaultInserter<true>::InsertHelper(I, Name, BB, InsertPt);
Worklist.Add(I);
}
};
-
+
/// InstCombiner - The -instcombine pass.
class LLVM_LIBRARY_VISIBILITY InstCombiner
: public FunctionPass,
DataLayout *TD;
TargetLibraryInfo *TLI;
bool MadeIRChange;
+ LibCallSimplifier *Simplifier;
+ bool MinimizeSize;
public:
/// Worklist - All of the instructions that need to be simplified.
InstCombineWorklist Worklist;
/// instructions into the worklist when they are created.
typedef IRBuilder<true, TargetFolder, InstCombineIRInserter> BuilderTy;
BuilderTy *Builder;
-
+
static char ID; // Pass identification, replacement for typeid
InstCombiner() : FunctionPass(ID), TD(0), Builder(0) {
+ MinimizeSize = false;
initializeInstCombinerPass(*PassRegistry::getPassRegistry());
}
public:
virtual bool runOnFunction(Function &F);
-
+
bool DoOneIteration(Function &F, unsigned ItNum);
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
Instruction *visitSub(BinaryOperator &I);
Instruction *visitFSub(BinaryOperator &I);
Instruction *visitMul(BinaryOperator &I);
+ Value *foldFMulConst(Instruction *FMulOrDiv, ConstantFP *C,
+ Instruction *InsertBefore);
Instruction *visitFMul(BinaryOperator &I);
Instruction *visitURem(BinaryOperator &I);
Instruction *visitSRem(BinaryOperator &I);
ConstantInt *DivRHS);
Instruction *FoldICmpShrCst(ICmpInst &ICI, BinaryOperator *DivI,
ConstantInt *DivRHS);
- Instruction *FoldICmpAddOpCst(ICmpInst &ICI, Value *X, ConstantInt *CI,
- ICmpInst::Predicate Pred, Value *TheAdd);
+ Instruction *FoldICmpAddOpCst(Instruction &ICI, Value *X, ConstantInt *CI,
+ ICmpInst::Predicate Pred);
Instruction *FoldGEPICmp(GEPOperator *GEPLHS, Value *RHS,
ICmpInst::Predicate Cond, Instruction &I);
Instruction *FoldShiftByConstant(Value *Op0, ConstantInt *Op1,
Instruction *visitPtrToInt(PtrToIntInst &CI);
Instruction *visitIntToPtr(IntToPtrInst &CI);
Instruction *visitBitCast(BitCastInst &CI);
+ Instruction *visitAddrSpaceCast(AddrSpaceCastInst &CI);
Instruction *FoldSelectOpOp(SelectInst &SI, Instruction *TI,
Instruction *FI);
Instruction *FoldSelectIntoOp(SelectInst &SI, Value*, Value*);
private:
bool ShouldChangeType(Type *From, Type *To) const;
Value *dyn_castNegVal(Value *V) const;
- Value *dyn_castFNegVal(Value *V) const;
- Type *FindElementAtOffset(Type *Ty, int64_t Offset,
- SmallVectorImpl<Value*> &NewIndices);
+ Value *dyn_castFNegVal(Value *V, bool NoSignedZero=false) const;
+ Type *FindElementAtOffset(Type *PtrTy, int64_t Offset,
+ SmallVectorImpl<Value*> &NewIndices);
Instruction *FoldOpIntoSelect(Instruction &Op, SelectInst *SI);
-
+
/// ShouldOptimizeCast - Return true if the cast from "V to Ty" actually
/// results in any code being generated and is interesting to optimize out. If
/// the cast can be eliminated by some other simple transformation, we prefer
Instruction *transformSExtICmp(ICmpInst *ICI, Instruction &CI);
bool WillNotOverflowSignedAdd(Value *LHS, Value *RHS);
Value *EmitGEPOffset(User *GEP);
+ Instruction *scalarizePHI(ExtractElementInst &EI, PHINode *PN);
+ Value *EvaluateInDifferentElementOrder(Value *V, ArrayRef<int> Mask);
public:
// InsertNewInstBefore - insert an instruction New before instruction Old
return New;
}
- // InsertNewInstWith - same as InsertNewInstBefore, but also sets the
+ // InsertNewInstWith - same as InsertNewInstBefore, but also sets the
// debug loc.
//
Instruction *InsertNewInstWith(Instruction *New, Instruction &Old) {
//
Instruction *ReplaceInstUsesWith(Instruction &I, Value *V) {
Worklist.AddUsersToWorkList(I); // Add all modified instrs to worklist.
-
+
// If we are replacing the instruction with itself, this must be in a
// segment of unreachable code, so just clobber the instruction.
- if (&I == V)
+ if (&I == V)
V = UndefValue::get(I.getType());
- DEBUG(errs() << "IC: Replacing " << I << "\n"
+ DEBUG(dbgs() << "IC: Replacing " << I << "\n"
" with " << *V << '\n');
I.replaceAllUsesWith(V);
// instruction. Instead, visit methods should return the value returned by
// this function.
Instruction *EraseInstFromFunction(Instruction &I) {
- DEBUG(errs() << "IC: ERASE " << I << '\n');
+ DEBUG(dbgs() << "IC: ERASE " << I << '\n');
assert(I.use_empty() && "Cannot erase instruction that is used!");
// Make sure that we reprocess all operands now that we reduced their
MadeIRChange = true;
return 0; // Don't do anything with FI
}
-
+
void ComputeMaskedBits(Value *V, APInt &KnownZero,
APInt &KnownOne, unsigned Depth = 0) const {
return llvm::ComputeMaskedBits(V, KnownZero, KnownOne, TD, Depth);
}
-
- bool MaskedValueIsZero(Value *V, const APInt &Mask,
+
+ bool MaskedValueIsZero(Value *V, const APInt &Mask,
unsigned Depth = 0) const {
return llvm::MaskedValueIsZero(V, Mask, TD, Depth);
}
/// SimplifyDemandedUseBits - Attempts to replace V with a simpler value
/// based on the demanded bits.
- Value *SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
+ Value *SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
APInt& KnownZero, APInt& KnownOne,
unsigned Depth);
- bool SimplifyDemandedBits(Use &U, APInt DemandedMask,
+ bool SimplifyDemandedBits(Use &U, APInt DemandedMask,
APInt& KnownZero, APInt& KnownOne,
unsigned Depth=0);
-
+ /// Helper routine of SimplifyDemandedUseBits. It tries to simplify demanded
+ /// bit for "r1 = shr x, c1; r2 = shl r1, c2" instruction sequence.
+ Value *SimplifyShrShlDemandedBits(Instruction *Lsr, Instruction *Sftl,
+ APInt DemandedMask, APInt &KnownZero,
+ APInt &KnownOne);
+
/// SimplifyDemandedInstructionBits - Inst is an integer instruction that
/// SimplifyDemandedBits knows about. See if the instruction has any
/// properties that allow us to simplify its operands.
bool SimplifyDemandedInstructionBits(Instruction &Inst);
-
+
Value *SimplifyDemandedVectorElts(Value *V, APInt DemandedElts,
APInt& UndefElts, unsigned Depth = 0);
-
+
// FoldOpIntoPhi - Given a binary operator, cast instruction, or select
// which has a PHI node as operand #0, see if we can fold the instruction
// into the PHI (which is only possible if all operands to the PHI are
Instruction *FoldPHIArgGEPIntoPHI(PHINode &PN);
Instruction *FoldPHIArgLoadIntoPHI(PHINode &PN);
-
+
Instruction *OptAndOp(Instruction *Op, ConstantInt *OpRHS,
ConstantInt *AndRHS, BinaryOperator &TheAnd);
-
+
Value *FoldLogicalPlusAnd(Value *LHS, Value *RHS, ConstantInt *Mask,
bool isSub, Instruction &I);
Value *InsertRangeTest(Value *V, Constant *Lo, Constant *Hi,
Value *EvaluateInDifferentType(Value *V, Type *Ty, bool isSigned);
+
+ /// Descale - Return a value X such that Val = X * Scale, or null if none. If
+ /// the multiplication is known not to overflow then NoSignedWrap is set.
+ Value *Descale(Value *Val, APInt Scale, bool &NoSignedWrap);
};
-
-
+
+
} // end namespace llvm.
#endif
projects / oota-llvm.git / blobdiff