clang-rename: fix renaming non-members variables when referenced as macro arguments

[vmiklos]

Summary

The second check failed, FOO(C::X) wasn't renamed to FOO(C::Y).

[klimek]

lg

clang-rename/USRLocFinder.cpp

public:
 
   // Expression visitors:
 
   bool VisitDeclRefExpr(const DeclRefExpr *Expr) {
     const auto *Decl = Expr->getFoundDecl();
 
     checkNestedNameSpecifierLoc(Expr->getQualifierLoc());
     if (getUSRForDecl(Decl) == USR) {
-      LocationsFound.push_back(Expr->getLocation());
+      const SourceManager &Manager = Decl->getASTContext().getSourceManager();
+      SourceLocation Location = Manager.getSpellingLoc(Expr->getLocation());
+      LocationsFound.push_back(Location);
     }
 
     return true;
   }
 
   bool VisitMemberExpr(const MemberExpr *Expr) {
     const auto *Decl = Expr->getFoundDecl().getDecl();
     if (getUSRForDecl(Decl) == USR) {

test/clang-rename/DeclRefExpr.cpp

+// RUN: cat %s > %t.cpp
+// RUN: clang-rename -offset=158 -new-name=Y %t.cpp -i --
+// RUN: sed 's,//.*,,' %t.cpp | FileCheck %s
+class C
+{
+public:
+  static int X;
+};
+
+int foo(int x)
+{
+  return 0;
+}
+#define FOO(a) foo(a)
+
+int main()
+{
+  C::X = 1; // CHECK: C::Y
+  FOO(C::X); // CHECK: C::Y
+  int y = C::X; // CHECK: C::Y
+}
+
+// Use grep -FUbo 'X' <file> to get the correct offset of foo when changing
+// this file.