Fix a couple of invalid location diagnostics

Author: hamishknight

lib/AST/Module.cpp

@@ -1031,9 +1031,8 @@ checkOperatorConflicts(const SourceFile &SF, SourceLoc loc,
       if (loc.isValid()) {
         ASTContext &C = SF.getASTContext();
         C.Diags.diagnose(loc, diag::ambiguous_operator_decls);
-        C.Diags.diagnose(start->first->getLoc(),
-                         diag::found_this_operator_decl);
-        C.Diags.diagnose(i->first->getLoc(), diag::found_this_operator_decl);
+        start->first->diagnose(diag::found_this_operator_decl);
+        i->first->diagnose(diag::found_this_operator_decl);
       }
       return end;
     }
@@ -1053,8 +1052,7 @@ checkOperatorConflicts(const SourceFile &SF, SourceLoc loc,
     ASTContext &C = SF.getASTContext();
     C.Diags.diagnose(loc, diag::ambiguous_precedence_groups);
     for (auto &entry : importedGroups) {
-      C.Diags.diagnose(entry.first->getLoc(),
-                       diag::found_this_precedence_group);
+      entry.first->diagnose(diag::found_this_precedence_group);
     }
   }
   return importedGroups.end();

test/decl/operator/lookup_compatibility.swift

@@ -5,9 +5,7 @@
 // RUN: %target-swift-frontend -emit-module %S/Inputs/lookup_moduleB.swift -module-name B -o %t -I %t
 // RUN: %target-swift-frontend -emit-module %S/Inputs/lookup_moduleA.swift -module-name A -o %t -I %t
 // RUN: %target-swift-frontend -emit-module %S/Inputs/lookup_module_exportsAC.swift -module-name ExportsAC -o %t -I %t
-
-// FIXME: Remove -verify-ignore-unknown.
-// RUN: %target-swift-frontend -typecheck -verify -verify-ignore-unknown -primary-file %s %S/Inputs/lookup_other.swift %S/Inputs/lookup_other2.swift %S/Inputs/lookup_other_compat.swift -I %t
+// RUN: %target-swift-frontend -typecheck -verify -primary-file %s %S/Inputs/lookup_other.swift %S/Inputs/lookup_other2.swift %S/Inputs/lookup_other_compat.swift -I %t
 
 import ExportsAC
 import B