Initial checkin of function and block profiling runtime library
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9546 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/runtime/libprofile/BlockProfiling.c b/runtime/libprofile/BlockProfiling.c
new file mode 100644
index 0000000..01b80a8
--- /dev/null
+++ b/runtime/libprofile/BlockProfiling.c
@@ -0,0 +1,43 @@
+/*===-- BlockProfiling.c - Support library for block 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 block profiling
+|* instrumentation pass. This should be used with the -insert-block-profiling
+|* LLVM pass.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <stdlib.h>
+
+static unsigned *ArrayStart;
+static unsigned NumElements;
+
+/* BlockProfAtExitHandler - When the program exits, just write out the profiling
+ * data.
+ */
+static void BlockProfAtExitHandler() {
+ /* Note that if this were doing something more intellegent with the
+ instrumentation, that we could do some computation here to expand what we
+ collected into simple block profiles. Since we directly count each block,
+ */
+ write_profiling_data(Block, ArrayStart, NumElements);
+}
+
+
+/* llvm_start_block_profiling - This is the main entry point of the block
+ * profiling library. It is responsible for setting up the atexit handler.
+ */
+void llvm_start_block_profiling(int argc, const char **argv,
+ unsigned *arrayStart, unsigned numElements) {
+ save_arguments(argc, argv);
+ ArrayStart = arrayStart;
+ NumElements = numElements;
+ atexit(BlockProfAtExitHandler);
+}