Allow to specify multiple -fsanitize-blacklist= arguments.

Summary:
Allow user to provide multiple blacklists by passing several
-fsanitize-blacklist= options. These options now don't override
default blacklist from Clang resource directory, which is always
applied (which fixes PR22431).

-fno-sanitize-blacklist option now disables all blacklists that
were specified earlier in the command line (including the default
one).

This change depends on http://reviews.llvm.org/D7367.

Test Plan: regression test suite

Reviewers: timurrrr

Subscribers: cfe-commits, kcc, pcc

Differential Revision: http://reviews.llvm.org/D7368

llvm-svn: 228156

clang/lib/CodeGen/BackendUtil.cpp

@@ -232,7 +232,7 @@ static void addDataFlowSanitizerPass(const PassManagerBuilder &Builder,
   const PassManagerBuilderWrapper &BuilderWrapper =
       static_cast<const PassManagerBuilderWrapper&>(Builder);
   const LangOptions &LangOpts = BuilderWrapper.getLangOpts();
-  PM.add(createDataFlowSanitizerPass(LangOpts.SanitizerBlacklistFile));
+  PM.add(createDataFlowSanitizerPass(LangOpts.SanitizerBlacklistFiles));
 }
 
 static TargetLibraryInfoImpl *createTLII(llvm::Triple &TargetTriple,