[AST] NFC: Rename ParameterInfoList::isPassedToSendableParameter to isSendableParameter

Just like other members of that type, `isPassedToSendableParameter` bit
set tracks information per parameter. The "passed" bit is applicable
to the argument rather than the parameter itself so it should bit kept
on the `AbstractClosureExpr`.

Author: xedin

include/swift/AST/Types.h

@@ -3836,7 +3836,7 @@ struct ParameterListInfo {
   SmallBitVector implicitSelfCapture;
   SmallBitVector inheritActorContext;
   SmallBitVector variadicGenerics;
-  SmallBitVector isPassedToSending;
+  SmallBitVector sendingParameters;
 
 public:
   ParameterListInfo() { }
@@ -3869,7 +3869,7 @@ struct ParameterListInfo {
   bool isVariadicGenericParameter(unsigned paramIdx) const;
 
   /// Returns true if this is a sending parameter.
-  bool isPassedToSendingParameter(unsigned paramIdx) const;
+  bool isSendingParameter(unsigned paramIdx) const;
 
   /// Retrieve the number of non-defaulted parameters.
   unsigned numNonDefaultedParameters() const {

lib/AST/Type.cpp

@@ -1304,7 +1304,7 @@ ParameterListInfo::ParameterListInfo(
   implicitSelfCapture.resize(params.size());
   inheritActorContext.resize(params.size());
   variadicGenerics.resize(params.size());
-  isPassedToSending.resize(params.size());
+  sendingParameters.resize(params.size());
 
   // No parameter owner means no parameter list means no default arguments
   // - hand back the zeroed bitvector.
@@ -1370,7 +1370,7 @@ ParameterListInfo::ParameterListInfo(
     }
 
     if (param->isSending()) {
-      isPassedToSending.set(i);
+      sendingParameters.set(i);
     }
   }
 }
@@ -1412,8 +1412,8 @@ bool ParameterListInfo::isVariadicGenericParameter(unsigned paramIdx) const {
       : false;
 }
 
-bool ParameterListInfo::isPassedToSendingParameter(unsigned paramIdx) const {
-  return paramIdx < isPassedToSending.size() ? isPassedToSending[paramIdx]
+bool ParameterListInfo::isSendingParameter(unsigned paramIdx) const {
+  return paramIdx < sendingParameters.size() ? sendingParameters[paramIdx]
                                              : false;
 }
 

lib/Sema/CSApply.cpp

@@ -6206,8 +6206,7 @@ ArgumentList *ExprRewriter::coerceCallArguments(
     // implicit self capture or inheriting actor context.
     bool isImplicitSelfCapture = paramInfo.isImplicitSelfCapture(paramIdx);
     bool inheritsActorContext = paramInfo.inheritsActorContext(paramIdx);
-    bool isPassedToSendingParameter =
-        paramInfo.isPassedToSendingParameter(paramIdx);
+    bool isPassedToSendingParameter = paramInfo.isSendingParameter(paramIdx);
 
     applyContextualClosureFlags(argExpr, isImplicitSelfCapture,
                                 inheritsActorContext,