[ScalarEvolution][NFC] Typo fix

Fix typo in ScalarEvolution public method.

Differential Revision: https://reviews.llvm.org/D156621

Author: kitaisreal

llvm/include/llvm/Analysis/ScalarEvolution.h

@@ -525,7 +525,7 @@ class ScalarEvolution {
   ///     loop { v2 = load @global2; }
   /// }
   /// No SCEV with operand V1, and v2 can exist in this program.
-  bool instructionCouldExistWitthOperands(const SCEV *A, const SCEV *B);
+  bool instructionCouldExistWithOperands(const SCEV *A, const SCEV *B);
 
   /// Return true if the SCEV is a scAddRecExpr or it contains
   /// scAddRecExpr. The result will be cached in HasRecMap.
@@ -855,7 +855,7 @@ class ScalarEvolution {
                                         const BasicBlock *ExitingBlock);
 
   /// The terms "backedge taken count" and "exit count" are used
-  /// interchangeably to refer to the number of times the backedge of a loop 
+  /// interchangeably to refer to the number of times the backedge of a loop
   /// has executed before the loop is exited.
   enum ExitCountKind {
     /// An expression exactly describing the number of times the backedge has
@@ -868,7 +868,7 @@ class ScalarEvolution {
   };
 
   /// Return the number of times the backedge executes before the given exit
-  /// would be taken; if not exactly computable, return SCEVCouldNotCompute. 
+  /// would be taken; if not exactly computable, return SCEVCouldNotCompute.
   /// For a single exit loop, this value is equivelent to the result of
   /// getBackedgeTakenCount.  The loop is guaranteed to exit (via *some* exit)
   /// before the backedge is executed (ExitCount + 1) times.  Note that there

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -1715,9 +1715,9 @@ const SCEV *ScalarEvolution::getZeroExtendExprImpl(const SCEV *Op, Type *Ty,
           Step = getZeroExtendExpr(Step, Ty, Depth + 1);
           return getAddRecExpr(Start, Step, L, AR->getNoWrapFlags());
         }
-        
+
         // For a negative step, we can extend the operands iff doing so only
-        // traverses values in the range zext([0,UINT_MAX]). 
+        // traverses values in the range zext([0,UINT_MAX]).
         if (isKnownNegative(Step)) {
           const SCEV *N = getConstant(APInt::getMaxValue(BitWidth) -
                                       getSignedRangeMin(Step));
@@ -4403,8 +4403,8 @@ Type *ScalarEvolution::getWiderType(Type *T1, Type *T2) const {
   return  getTypeSizeInBits(T1) >= getTypeSizeInBits(T2) ? T1 : T2;
 }
 
-bool ScalarEvolution::instructionCouldExistWitthOperands(const SCEV *A,
-                                                         const SCEV *B) {
+bool ScalarEvolution::instructionCouldExistWithOperands(const SCEV *A,
+                                                        const SCEV *B) {
   /// For a valid use point to exist, the defining scope of one operand
   /// must dominate the other.
   bool PreciseA, PreciseB;
@@ -4417,7 +4417,6 @@ bool ScalarEvolution::instructionCouldExistWitthOperands(const SCEV *A,
     DT.dominates(ScopeB, ScopeA);
 }
 
-
 const SCEV *ScalarEvolution::getCouldNotCompute() {
   return CouldNotCompute.get();
 }
@@ -9007,7 +9006,7 @@ ScalarEvolution::ExitLimit ScalarEvolution::computeExitLimitFromICmp(
       InnerLHS = ZExt->getOperand();
     if (const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(InnerLHS)) {
       auto *StrideC = dyn_cast<SCEVConstant>(AR->getStepRecurrence(*this));
-      if (!AR->hasNoSelfWrap() && AR->getLoop() == L && AR->isAffine() && 
+      if (!AR->hasNoSelfWrap() && AR->getLoop() == L && AR->isAffine() &&
           StrideC && StrideC->getAPInt().isPowerOf2()) {
         auto Flags = AR->getNoWrapFlags();
         Flags = setFlags(Flags, SCEV::FlagNW);
@@ -12501,7 +12500,7 @@ bool ScalarEvolution::canIVOverflowOnLT(const SCEV *RHS, const SCEV *Stride,
 
 bool ScalarEvolution::canIVOverflowOnGT(const SCEV *RHS, const SCEV *Stride,
                                         bool IsSigned) {
-  
+
   unsigned BitWidth = getTypeSizeInBits(RHS->getType());
   const SCEV *One = getOne(Stride->getType());
 

llvm/lib/Analysis/ScalarEvolutionAliasAnalysis.cpp

@@ -30,7 +30,7 @@ static bool canComputePointerDiff(ScalarEvolution &SE,
       SE.getEffectiveSCEVType(B->getType()))
     return false;
 
-  return SE.instructionCouldExistWitthOperands(A, B);
+  return SE.instructionCouldExistWithOperands(A, B);
 }
 
 AliasResult SCEVAAResult::alias(const MemoryLocation &LocA,