From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Fri, 8 Apr 2016 01:23:59 +0000 (+0000)
Subject: [modules] Add a comment to explain why -E leaves some #includes in the preprocessed... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7249d7283da9cb6ba8ace1fe4cb8e626e1b76dfd;p=clang

[modules] Add a comment to explain why -E leaves some #includes in the preprocessed output.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@265766 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Frontend/PrintPreprocessedOutput.cpp b/lib/Frontend/PrintPreprocessedOutput.cpp
index 9524b58e3a..77b80e612f 100644
--- a/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -336,7 +336,9 @@ void PrintPPOutputPPCallbacks::InclusionDirective(SourceLocation HashLoc,
       OS << "#include "
          << (IsAngled ? '<' : '"')
          << FileName
-         << (IsAngled ? '>' : '"');
+         << (IsAngled ? '>' : '"')
+         << " /* clang -E: implicit import for module "
+         << Imported->getFullModuleName() << " */";
     }
     // Since we want a newline after the @import, but not a #<line>, start a new
     // line immediately.
diff --git a/test/Modules/preprocess.cpp b/test/Modules/preprocess.cpp
index aa28191722..0615331c8b 100644
--- a/test/Modules/preprocess.cpp
+++ b/test/Modules/preprocess.cpp
@@ -1,6 +1,6 @@
 // RUN: rm -rf %t
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs -x c++ -E %s | \
-// RUN:   FileCheck -strict-whitespace %s --check-prefix=CHECK --check-prefix=CXX
+// RUN:   FileCheck -strict-whitespace %s --check-prefix=CHECK --check-prefix=CXX --check-prefix=CXX-DASHE
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs -x objective-c -E %s | \
 // RUN:   FileCheck -strict-whitespace %s --check-prefix=CHECK --check-prefix=OBJC
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs -x c++ -E -frewrite-includes %s | \
@@ -14,7 +14,9 @@ foo bar baz
 // The weird {{ }} here is to prevent the -frewrite-includes test from matching its own CHECK lines.
 
 // CXX: #include{{ }}"dummy.h"
+// CXX-DASHE-SAME: /* clang -E: implicit import for module dummy */
 // CXX: #include{{ }}"dummy.h"
+// CXX-DASHE-SAME: /* clang -E: implicit import for module dummy */
 // CXX: foo bar baz
 
 // OBJC: @import{{ }}dummy; /* clang