From c7be10245e78bf38694b26f289880edefb9f16e9 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 5 Nov 2012 23:58:27 +0000
Subject: [PATCH] Have the parser initialize Sema before it consumes the first
 token. This is important because the first token could actually be after an
 #include that triggers a module import, which might use either Sema or the
 AST consumer before it would have been initialized.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167423 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenAction.cpp                         | 4 +++-
 lib/Parse/ParseAST.cpp                                | 1 -
 lib/Parse/Parser.cpp                                  | 8 +++++---
 test/Modules/Inputs/Module.framework/Headers/Module.h | 2 ++
 test/Modules/direct-module-import.m                   | 7 +++++++
 5 files changed, 17 insertions(+), 5 deletions(-)
 create mode 100644 test/Modules/direct-module-import.m

diff --git a/lib/CodeGen/CodeGenAction.cpp b/lib/CodeGen/CodeGenAction.cpp
index dd32167b84..1c536a6970 100644
--- a/lib/CodeGen/CodeGenAction.cpp
+++ b/lib/CodeGen/CodeGenAction.cpp
@@ -65,9 +65,11 @@ namespace clang {
       TargetOpts(targetopts),
       LangOpts(langopts),
       AsmOutStream(OS),
+      Context(), 
       LLVMIRGeneration("LLVM IR Generation Time"),
       Gen(CreateLLVMCodeGen(Diags, infile, compopts, C)),
-      LinkModule(LinkModule) {
+      LinkModule(LinkModule)
+    {
       llvm::TimePassesIsEnabled = TimePasses;
     }
 
diff --git a/lib/Parse/ParseAST.cpp b/lib/Parse/ParseAST.cpp
index bd4f859521..7d68e1f37e 100644
--- a/lib/Parse/ParseAST.cpp
+++ b/lib/Parse/ParseAST.cpp
@@ -78,7 +78,6 @@ void clang::ParseAST(Sema &S, bool PrintStats, bool SkipFunctionBodies) {
 
   S.getPreprocessor().EnterMainSourceFile();
   P.Initialize();
-  S.Initialize();
 
   // C11 6.9p1 says translation units must have at least one top-level
   // declaration. C++ doesn't have this restriction. We also don't want to
diff --git a/lib/Parse/Parser.cpp b/lib/Parse/Parser.cpp
index e6b49474f7..7bf4220199 100644
--- a/lib/Parse/Parser.cpp
+++ b/lib/Parse/Parser.cpp
@@ -470,9 +470,6 @@ void Parser::Initialize() {
   EnterScope(Scope::DeclScope);
   Actions.ActOnTranslationUnitScope(getCurScope());
 
-  // Prime the lexer look-ahead.
-  ConsumeToken();
-
   // Initialization for Objective-C context sensitive keywords recognition.
   // Referenced in Parser::ParseObjCTypeQualifierList.
   if (getLangOpts().ObjC1) {
@@ -527,6 +524,11 @@ void Parser::Initialize() {
     PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
     PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
   }
+
+  Actions.Initialize();
+
+  // Prime the lexer look-ahead.
+  ConsumeToken();
 }
 
 namespace {
diff --git a/test/Modules/Inputs/Module.framework/Headers/Module.h b/test/Modules/Inputs/Module.framework/Headers/Module.h
index f8949848bd..3d2476b204 100644
--- a/test/Modules/Inputs/Module.framework/Headers/Module.h
+++ b/test/Modules/Inputs/Module.framework/Headers/Module.h
@@ -23,4 +23,6 @@ const char *getModuleVersion(void);
 #include <Module/Sub.h>
 #include <Module/Buried/Treasure.h>
 
+__asm("foo");
+
 #endif // MODULE_H
diff --git a/test/Modules/direct-module-import.m b/test/Modules/direct-module-import.m
new file mode 100644
index 0000000000..317d7aea16
--- /dev/null
+++ b/test/Modules/direct-module-import.m
@@ -0,0 +1,7 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodule-cache-path %t -fmodules -F %S/Inputs -include Module/Module.h %s -emit-llvm -o - | FileCheck %s
+
+// CHECK: call i8* @getModuleVersion
+const char* getVer(void) {
+  return getModuleVersion();
+}
-- 
2.40.0