commit c0c03bc3c4669897ce8a995d7c20d9c71bc7cc8f
author Ted Kremenek <kremenek@apple.com> Fri Jun 06 22:42:39 2008 +0000
committer Ted Kremenek <kremenek@apple.com> Fri Jun 06 22:42:39 2008 +0000
tree 9ce39c5f3c0cb22cc0dc4d0b199af5764dc6afef
parent 2505d73303a1edf00209612fa5a13dad4bf12ed2

Use a common SourceManager when processing multiple files.  This allows us to cache the contents of source files already loaded from disk.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52066 91177308-0d34-0410-b5e6-96231b3b80d8

Driver/clang.cpp

diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index 5eec67c..6f7e1a2 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -1459,6 +1459,8 @@
     exit(1);
   }
   
+  llvm::OwningPtr<SourceManager> SourceMgr;
+  
   for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
     const std::string &InFile = InputFilenames[i];
     
@@ -1467,7 +1469,10 @@
     else {            
       /// Create a SourceManager object.  This tracks and owns all the file
       /// buffers allocated to a translation unit.
-      SourceManager SourceMgr;
+      if (!SourceMgr)
+        SourceMgr.reset(new SourceManager());
+      else
+        SourceMgr->clearIDTables();
       
       // Initialize language options, inferring file types from input filenames.
       LangOptions LangInfo;
@@ -1490,7 +1495,7 @@
       
       // Set up the preprocessor with these options.
       DriverPreprocessorFactory PPFactory(InFile, Diags, LangInfo, *Target,
-                                          SourceMgr, HeaderInfo);
+                                          *SourceMgr.get(), HeaderInfo);
       
       llvm::OwningPtr<Preprocessor> PP(PPFactory.CreatePreprocessor());
             
@@ -1498,13 +1503,14 @@
         continue;
       
       ProcessInputFile(*PP, PPFactory, InFile);
-      HeaderInfo.ClearFileInfo();
+      HeaderInfo.ClearFileInfo();      
       
       if (Stats)
-        SourceMgr.PrintStats();
+        SourceMgr->PrintStats();
     }
   }
   
+  
   delete Target;
 
   unsigned NumDiagnostics = Diags.getNumDiagnostics();