Update llvm/clang to trunk r126547.

There are several bugfixes in this update, but the most important one is
to ensure __start_ and __stop_ symbols for linker sets and kernel module
metadata are always emitted in object files:

  http://llvm.org/bugs/show_bug.cgi?id=9292

Before this fix, if you compiled kernel modules with clang, they would
not be properly processed by kldxref, and if they had any dependencies,
the kernel would fail to load those.  Another problem occurred when
attempting to mount a tmpfs filesystem, which would result in 'operation
not supported by device'.

2 files changed, 19 insertions, 5 deletions

diff --git a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp
index dbfebcc..e3e7ee9 100644
--- a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp
+++ b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp
@@ -175,7 +175,8 @@ public:
 
   virtual void Initialize(ASTContext &Context) {
     Ctx = &Context;
-    checkerMgr.reset(registerCheckers(Opts, PP.getDiagnostics()));
+    checkerMgr.reset(registerCheckers(Opts, PP.getLangOptions(),
+                                      PP.getDiagnostics()));
     Mgr.reset(new AnalysisManager(*Ctx, PP.getDiagnostics(),
                                   PP.getLangOptions(), PD,
                                   CreateStoreMgr, CreateConstraintMgr,
@@ -339,9 +340,6 @@ static void ActionExprEngine(AnalysisConsumer &C, AnalysisManager& mgr,
     return;
   ExprEngine Eng(mgr, TF.take());
 
-  if (C.Opts.EnableExperimentalInternalChecks)
-    RegisterExperimentalInternalChecks(Eng);
-
   RegisterNSErrorChecks(Eng.getBugReporter(), Eng, *D);
 
   if (C.Opts.EnableExperimentalChecks)
diff --git a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
index 6625729..677e20c 100644
--- a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
+++ b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
@@ -12,12 +12,14 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h"
+#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
 #include "../Checkers/ClangSACheckerProvider.h"
 #include "clang/StaticAnalyzer/Core/CheckerManager.h"
 #include "clang/StaticAnalyzer/Core/CheckerProvider.h"
 #include "clang/Frontend/AnalyzerOptions.h"
 #include "clang/Frontend/FrontendDiagnostic.h"
 #include "clang/Basic/Diagnostic.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallVector.h"
 
@@ -25,8 +27,9 @@ using namespace clang;
 using namespace ento;
 
 CheckerManager *ento::registerCheckers(const AnalyzerOptions &opts,
+                                       const LangOptions &langOpts,
                                        Diagnostic &diags) {
-  llvm::OwningPtr<CheckerManager> checkerMgr(new CheckerManager());
+  llvm::OwningPtr<CheckerManager> checkerMgr(new CheckerManager(langOpts));
 
   llvm::SmallVector<CheckerOptInfo, 8> checkerOpts;
   for (unsigned i = 0, e = opts.CheckersControlList.size(); i != e; ++i) {
@@ -48,3 +51,16 @@ CheckerManager *ento::registerCheckers(const AnalyzerOptions &opts,
 
   return checkerMgr.take();
 }
+
+void ento::printCheckerHelp(llvm::raw_ostream &OS) {
+  OS << "OVERVIEW: Clang Static Analyzer Checkers List\n";
+  OS << '\n';
+  OS << "USAGE: -analyzer-checker <check1,check2,...>\n";
+  OS << '\n';
+  OS << "CHECKERS:\n";
+
+  llvm::OwningPtr<CheckerProvider> provider(createClangSACheckerProvider());
+  provider->printHelp(OS);
+
+  // FIXME: Load CheckerProviders from plugins.
+}