AST: Don't set source location on cloned parameter lists

Author: slavapestov

lib/AST/Decl.cpp

@@ -6106,8 +6106,8 @@ ParamDecl::ParamDecl(SourceLoc specifierLoc,
 
 ParamDecl *ParamDecl::cloneWithoutType(const ASTContext &Ctx, ParamDecl *PD) {
   auto *Clone = new (Ctx) ParamDecl(
-      PD->getSpecifierLoc(), PD->getArgumentNameLoc(), PD->getArgumentName(),
-      PD->getArgumentNameLoc(), PD->getParameterName(), PD->getDeclContext());
+      SourceLoc(), SourceLoc(), PD->getArgumentName(),
+      SourceLoc(), PD->getParameterName(), PD->getDeclContext());
   Clone->DefaultValueAndFlags.setPointerAndInt(
       nullptr, PD->DefaultValueAndFlags.getInt());
   Clone->Bits.ParamDecl.defaultArgumentKind =

test/SILGen/Inputs/partial_apply_debuginfo_other.swift

@@ -0,0 +1,3 @@
+public class Horse {
+  func buck(rider: Any) {}
+}

test/SILGen/partial_apply_debuginfo.swift

@@ -0,0 +1,7 @@
+// RUN: %target-swift-frontend -emit-silgen %S/Inputs/partial_apply_debuginfo_other.swift -primary-file %s -module-name partial_apply_debuginfo -g -Xllvm -sil-print-debuginfo | %FileCheck %s
+
+func doIt() {
+  _ = Horse.buck
+}
+
+// CHECK-NOT: partial_apply_debuginfo_other.swift