[Clang] Add VerboseOutputStream to CompilerInstance

Remove one instance of a hardcoded output stream in
CompilerInstance::ExecuteAction. There are still other cases of output
being hard-coded to standard streams in ExecuteCompilerInvocation, but
this patch covers the case when no flags like -version or -help are
passed, namely the "X warnings and Y errors generated." diagnostic.

Differential Revision: https://reviews.llvm.org/D53768

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375442 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 3 deletions

diff --git a/include/clang/Frontend/CompilerInstance.h b/include/clang/Frontend/CompilerInstance.h
index eb49c53ff4..d15bdc4665 100644
--- a/include/clang/Frontend/CompilerInstance.h
+++ b/include/clang/Frontend/CompilerInstance.h
@@ -155,6 +155,12 @@ class CompilerInstance : public ModuleLoader {
   /// One or more modules failed to build.
   bool ModuleBuildFailed = false;
 
+  /// The stream for verbose output if owned, otherwise nullptr.
+  std::unique_ptr<raw_ostream> OwnedVerboseOutputStream;
+
+  /// The stream for verbose output.
+  raw_ostream *VerboseOutputStream = &llvm::errs();
+
   /// Holds information about the output file.
   ///
   /// If TempFilename is not empty we must rename it to Filename at the end.
@@ -217,9 +223,6 @@ public:
   /// \param Act - The action to execute.
   /// \return - True on success.
   //
-  // FIXME: This function should take the stream to write any debugging /
-  // verbose output to as an argument.
-  //
   // FIXME: Eliminate the llvm_shutdown requirement, that should either be part
   // of the context or else not CompilerInstance specific.
   bool ExecuteAction(FrontendAction &Act);
@@ -350,6 +353,21 @@ public:
   }
 
   /// }
+  /// @name VerboseOutputStream
+  /// }
+
+  /// Replace the current stream for verbose output.
+  void setVerboseOutputStream(raw_ostream &Value);
+
+  /// Replace the current stream for verbose output.
+  void setVerboseOutputStream(std::unique_ptr<raw_ostream> Value);
+
+  /// Get the current stream for verbose output.
+  raw_ostream &getVerboseOutputStream() {
+    return *VerboseOutputStream;
+  }
+
+  /// }
   /// @name Target Info
   /// {