Organize LLVM C API docs into doxygen modules; add docs

This gives a lot of love to the docs for the C API. Like Clang's
documentation, the C API is now organized into a Doxygen "module"
(LLVMC). Each C header file is a child of the main module. Some modules
(like Core) have a hierarchy of there own. The produced documentation is
thus better organized (before everything was in one monolithic list).

This patch also includes a lot of new documentation for APIs in Core.h.
It doesn't document them all, but is better than none. Function docs are
missing @param and @return annotation, but the documentation body now
commonly provides help details (like the expected llvm::Value sub-type
to expect).

llvm-svn: 153157

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/BitWriter.h b/llvm/include/llvm-c/BitWriter.h
index bcbfb111492..ba5a6778c94 100644
--- a/llvm/include/llvm-c/BitWriter.h
+++ b/llvm/include/llvm-c/BitWriter.h
@@ -25,6 +25,12 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup LLVMCBitWriter Bit Writer
+ * @ingroup LLVMC
+ *
+ * @{
+ */
 
 /*===-- Operations on modules ---------------------------------------------===*/
 
@@ -39,6 +45,10 @@ int LLVMWriteBitcodeToFD(LLVMModuleRef M, int FD, int ShouldClose,
     descriptor. Returns 0 on success. Closes the Handle. */ 
 int LLVMWriteBitcodeToFileHandle(LLVMModuleRef M, int Handle);
 
+/**
+ * @}
+ */
+
 #ifdef __cplusplus
 }
 #endif