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author | Andreas Neustifter <astifter-llvm@gmx.at> | 2009-09-01 19:03:44 +0000 |
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committer | Andreas Neustifter <astifter-llvm@gmx.at> | 2009-09-01 19:03:44 +0000 |
commit | f771dae69aee00a16dbfb7e712bf26ab2b9d9cde (patch) | |
tree | c44a44042fde0dadb3ff1e24b09bd429885e7c5e /runtime/libprofile/OptimalEdgeProfiling.c | |
parent | 19531d113c74d734a6e4128653ad694089e8981b (diff) | |
download | external_llvm-f771dae69aee00a16dbfb7e712bf26ab2b9d9cde.zip external_llvm-f771dae69aee00a16dbfb7e712bf26ab2b9d9cde.tar.gz external_llvm-f771dae69aee00a16dbfb7e712bf26ab2b9d9cde.tar.bz2 |
OptimalEdgeProfiling: Creation of profiles.
This adds the instrumentation and runtime part of OptimalEdgeProfiling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80712 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'runtime/libprofile/OptimalEdgeProfiling.c')
-rw-r--r-- | runtime/libprofile/OptimalEdgeProfiling.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/runtime/libprofile/OptimalEdgeProfiling.c b/runtime/libprofile/OptimalEdgeProfiling.c new file mode 100644 index 0000000..eb7887b --- /dev/null +++ b/runtime/libprofile/OptimalEdgeProfiling.c @@ -0,0 +1,45 @@ +/*===-- OptimalEdgeProfiling.c - Support library for opt. edge profiling --===*\ +|* +|* The LLVM Compiler Infrastructure +|* +|* This file 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-opt-edge-profiling LLVM pass. +|* +\*===----------------------------------------------------------------------===*/ + +#include "Profiling.h" +#include <stdlib.h> + +static unsigned *ArrayStart; +static unsigned NumElements; + +/* OptEdgeProfAtExitHandler - When the program exits, just write out the + * profiling data. + */ +static void OptEdgeProfAtExitHandler() { + /* Note that, although the array has a counter for each edge, not all + * counters are updated, the ones that are not used are initialised with -1. + * When loading this information the counters with value -1 have to be + * recalculated, it is guranteed that this is possible. + */ + write_profiling_data(OptEdgeInfo, ArrayStart, NumElements); +} + + +/* llvm_start_opt_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_opt_edge_profiling(int argc, const char **argv, + unsigned *arrayStart, unsigned numElements) { + int Ret = save_arguments(argc, argv); + ArrayStart = arrayStart; + NumElements = numElements; + atexit(OptEdgeProfAtExitHandler); + return Ret; +} |