Support/PathV1: Deprecate get{Basename,Dirname,Suffix}.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122157 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CompilerDriver/CompilationGraph.cpp b/lib/CompilerDriver/CompilationGraph.cpp
index 87a2c48..33c6566 100644
--- a/lib/CompilerDriver/CompilationGraph.cpp
+++ b/lib/CompilerDriver/CompilationGraph.cpp
@@ -32,7 +32,8 @@
 namespace llvmc {
 
   const std::string* LanguageMap::GetLanguage(const sys::Path& File) const {
-    StringRef suf = File.getSuffix();
+    // Remove the '.'.
+    StringRef suf = sys::path::extension(File.str()).substr(1);
     LanguageMap::const_iterator Lang =
       this->find(suf.empty() ? "*empty*" : suf);
     if (Lang == this->end()) {