s/replace/subst/

Author: chapuni

llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h

@@ -215,10 +215,10 @@ class CounterExpressionBuilder {
   /// LHS.
   Counter subtract(Counter LHS, Counter RHS, bool Simplify = true);
 
-  using ReplaceMap = std::map<Counter, Counter>;
+  using SubstMap = std::map<Counter, Counter>;
 
-  /// Return a counter for each term in the expression replaced by ReplaceMap.
-  Counter replace(Counter C, const ReplaceMap &Map);
+  /// Return a counter for each term in the expression replaced by SubstMap.
+  Counter subst(Counter C, const SubstMap &Map);
 };
 
 using LineColPair = std::pair<unsigned, unsigned>;

llvm/lib/ProfileData/Coverage/CoverageMapping.cpp

@@ -135,18 +135,17 @@ Counter CounterExpressionBuilder::subtract(Counter LHS, Counter RHS,
   return Simplify ? simplify(Cnt) : Cnt;
 }
 
-Counter CounterExpressionBuilder::replace(Counter C, const ReplaceMap &Map) {
+Counter CounterExpressionBuilder::subst(Counter C, const SubstMap &Map) {
   // Replace C with the value found in Map even if C is Expression.
   if (auto I = Map.find(C); I != Map.end())
     return I->second;
 
   if (!C.isExpression())
     return C;
 
-  // Traverse both sides of Expression.
   auto CE = Expressions[C.getExpressionID()];
-  auto NewLHS = replace(CE.LHS, Map);
-  auto NewRHS = replace(CE.RHS, Map);
+  auto NewLHS = subst(CE.LHS, Map);
+  auto NewRHS = subst(CE.RHS, Map);
 
   // Reconstruct Expression with induced subexpressions.
   switch (CE.Kind) {