Unrevert r244412 (reverted in r244414), and delete the bogus line left behind
in the unit test that was checking a file the test no longer creates.

llvm-svn: 244415
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index 4e7b08a..5133ffc 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -944,8 +944,10 @@
     FullSourceLoc(ImportLoc, ImportingInstance.getSourceManager()));
 
   // If we're collecting module dependencies, we need to share a collector
-  // between all of the module CompilerInstances.
+  // between all of the module CompilerInstances. Other than that, we don't
+  // want to produce any dependency output from the module build.
   Instance.setModuleDepCollector(ImportingInstance.getModuleDepCollector());
+  Invocation->getDependencyOutputOpts() = DependencyOutputOptions();
 
   // Get or create the module map that we'll use to build this module.
   std::string InferredModuleMapContent;
diff --git a/clang/test/Modules/dependency-gen.modulemap b/clang/test/Modules/dependency-gen.modulemap
index bea2365..ba109c2 100644
--- a/clang/test/Modules/dependency-gen.modulemap
+++ b/clang/test/Modules/dependency-gen.modulemap
@@ -1,8 +1,10 @@
 // RUN: cd %S
-// RUN: rm -f %t.cpm %t-base.pcm %t-base.d %t.d
-// RUN: %clang_cc1 -I. -x c++ -fmodule-name=test-base -fmodules -emit-module -fno-validate-pch -fmodules-strict-decluse Inputs/dependency-gen-base.modulemap -dependency-file %t-base.d -MT %t-base.pcm -o %t-base.pcm -fmodule-map-file-home-is-cwd
-// RUN: %clang_cc1 -I. -x c++ -fmodule-name=test -fmodules -emit-module -fno-validate-pch -fmodules-strict-decluse -fmodule-file=%t-base.pcm %s -dependency-file %t.d -MT %t.pcm -o %t.pcm -fmodules-cache-path=%t -fmodule-map-file-home-is-cwd
-// RUN: FileCheck %s < %t.d
+// RUN: rm -rf %t
+//
+// RUN: %clang_cc1 -I. -x c++ -fmodule-name=test -fmodules -emit-module -fno-validate-pch -fmodules-strict-decluse %s -dependency-file - -MT implicit.pcm -o %t/implicit.pcm -fmodules-cache-path=%t -fmodule-map-file-home-is-cwd | FileCheck %s
+//
+// RUN: %clang_cc1 -I. -x c++ -fmodule-name=test-base -fmodules -emit-module -fno-validate-pch -fmodules-strict-decluse Inputs/dependency-gen-base.modulemap -o %t/base.pcm -fmodule-map-file-home-is-cwd
+// RUN: %clang_cc1 -I. -x c++ -fmodule-name=test -fmodules -emit-module -fno-validate-pch -fmodules-strict-decluse -fmodule-file=%t/base.pcm %s -dependency-file - -MT explicit.pcm -o %t/explicit.pcm -fmodules-cache-path=%t -fmodule-map-file-home-is-cwd | FileCheck %s
 module "test" {
   export *
   header "Inputs/dependency-gen.h"