Macro history (de-)serialization. Deserialization currently reads only the latest macro definition. Needs more work.

Summary: Passes all tests (+ the new one with code completion), but needs a thorough review in part related to modules.

Reviewers: doug.gregor

Reviewed By: alexfh

CC: cfe-commits, rsmith

Differential Revision: http://llvm-reviews.chandlerc.com/D41

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164610 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeCompletion/macros.c b/test/CodeCompletion/macros.c
index 0758bbf..28f69b2 100644
--- a/test/CodeCompletion/macros.c
+++ b/test/CodeCompletion/macros.c
@@ -13,11 +13,15 @@
   // RUN: %clang_cc1 -include %S/Inputs/macros.h -fsyntax-only -code-completion-macros -code-completion-at=%s:14:9 %s -o - | FileCheck -check-prefix=CC2 %s
     case 
   }
+  // RUN: %clang_cc1 -include %S/Inputs/macros.h -fsyntax-only -code-completion-macros -code-completion-at=%s:17:7 %s -o - | FileCheck -check-prefix=CC3 %s
+#ifdef Q
+#endif
 
   // Run the same tests, this time with macros loaded from the PCH file.
   // RUN: %clang_cc1 -emit-pch -o %t %S/Inputs/macros.h
   // RUN: %clang_cc1 -include-pch %t -fsyntax-only -code-completion-macros -code-completion-at=%s:12:14 %s -o - | FileCheck -check-prefix=CC1 %s
   // RUN: %clang_cc1 -include-pch %t -fsyntax-only -code-completion-macros -code-completion-at=%s:14:9 %s -o - | FileCheck -check-prefix=CC2 %s
+  // RUN: %clang_cc1 -include-pch %t -fsyntax-only -code-completion-macros -code-completion-at=%s:17:7 %s -o - | FileCheck -check-prefix=CC3 %s
 
   // CC1: color
   // CC1: x
@@ -29,6 +33,14 @@
   // CC2: FOO
   // CC2: Green
   // CC2: IDENTITY(<#X#>)
+  // CC2: MACRO_WITH_HISTORY(<#X#>, <#Y#>)
   // CC2: Red
   // CC2: WIBBLE
+
+  // CC3: BAR
+  // CC3: DEAD_MACRO
+  // CC3: FOO
+  // CC3: IDENTITY
+  // CC3: MACRO_WITH_HISTORY
+  // CC3: WIBBLE
 }