[llvm-commits] CVS: llvm/runtime/libprofile/EdgeProfiling.c

[Chris Lattner]

Changes in directory llvm/runtime/libprofile:

EdgeProfiling.c added (r1.1)

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Log message:

Add edge profiling support to the runtime library


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Diffs of the changes:  (+45 -0)

Index: llvm/runtime/libprofile/EdgeProfiling.c
diff -c /dev/null llvm/runtime/libprofile/EdgeProfiling.c:1.1
*** /dev/null	Mon Mar  8 12:04:41 2004
--- llvm/runtime/libprofile/EdgeProfiling.c	Mon Mar  8 12:04:31 2004
***************
*** 0 ****
--- 1,45 ----
+ /*===-- EdgeProfiling.c - Support library for edge 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 edge profiling
+ |* instrumentation pass.  This should be used with the -insert-edge-profiling
+ |* LLVM pass.
+ |*
+ \*===----------------------------------------------------------------------===*/
+ 
+ #include "Profiling.h"
+ #include <stdlib.h>
+ 
+ static unsigned *ArrayStart;
+ static unsigned NumElements;
+ 
+ /* EdgeProfAtExitHandler - When the program exits, just write out the profiling
+  * data.
+  */
+ static void EdgeProfAtExitHandler() {
+   /* 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 edge profiles.  Since we directly count each edge, we
+      just write out all of the counters directly.
+   */
+   write_profiling_data(Edge, ArrayStart, NumElements);
+ }
+ 
+ 
+ /* llvm_start_edge_profiling - This is the main entry point of the edge
+  * profiling library.  It is responsible for setting up the atexit handler.
+  */
+ int llvm_start_edge_profiling(int argc, const char **argv,
+                               unsigned *arrayStart, unsigned numElements) {
+   int Ret = save_arguments(argc, argv);
+   ArrayStart = arrayStart;
+   NumElements = numElements;
+   atexit(EdgeProfAtExitHandler);
+   return Ret;
+ }