Return -1 only on failure to execute a program.

Also fix some comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109499 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/include/llvm/CompilerDriver/Tool.h b/include/llvm/CompilerDriver/Tool.h
index d064a03eeb..45ef50d0b5 100644
--- a/include/llvm/CompilerDriver/Tool.h
+++ b/include/llvm/CompilerDriver/Tool.h
@@ -38,6 +38,8 @@ namespace llvmc {
 
     virtual ~Tool() {}
 
+    /// GenerateAction - Generate an Action given particular command-line
+    /// options. Returns non-zero value on error.
     virtual int GenerateAction (Action& Out,
                                 const PathVector& inFiles,
                                 const bool HasChildren,
@@ -45,6 +47,8 @@ namespace llvmc {
                                 const InputLanguagesSet& InLangs,
                                 const LanguageMap& LangMap) const = 0;
 
+    /// GenerateAction - Generate an Action given particular command-line
+    /// options. Returns non-zero value on error.
     virtual int GenerateAction (Action& Out,
                                 const llvm::sys::Path& inFile,
                                 const bool HasChildren,