Undo removal of the runtime libraries. While this may have been a bit

premature, these libraries will be going away for the 2.0 release. Other
arrangements for profiling, gc, etc. should be made in the next few months.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31807 91177308-0d34-0410-b5e6-96231b3b80d8

runtime/libprofile/FunctionProfiling.c

@@ -0,0 +1,42 @@
+/*===-- FunctionProfiling.c - Support library for function profiling ------===*\
+|*
+|*                     The LLVM Compiler Infrastructure
+|*
+|* This file was developed by the LLVM research group and is distributed under
+|* the University of Illinois Open Source License. See LICENSE.TXT for details.
+|* 
+|*===----------------------------------------------------------------------===*|
+|* 
+|* This file implements the call back routines for the function profiling
+|* instrumentation pass.  This should be used with the
+|* -insert-function-profiling LLVM pass.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <stdlib.h>
+
+static unsigned *ArrayStart;
+static unsigned NumElements;
+
+/* FuncProfAtExitHandler - When the program exits, just write out the profiling
+ * data.
+ */
+static void FuncProfAtExitHandler() {
+  /* Just write out the data we collected.
+   */
+  write_profiling_data(FunctionInfo, ArrayStart, NumElements);
+}
+
+
+/* llvm_start_func_profiling - This is the main entry point of the function
+ * profiling library.  It is responsible for setting up the atexit handler.
+ */
+int llvm_start_func_profiling(int argc, const char **argv,
+                              unsigned *arrayStart, unsigned numElements) {
+  int Ret = save_arguments(argc, argv);
+  ArrayStart = arrayStart;
+  NumElements = numElements;
+  atexit(FuncProfAtExitHandler);
+  return Ret;
+}