+ * include/cilk/common.h (__CILKRTS_ABI_VERSION): Set the ABI version + to 1 instead of 0.

2014-02-18  Balaji V. Iyer  <balaji.v.iyer@intel.com>
+
+	* include/cilk/common.h (__CILKRTS_ABI_VERSION): Set the ABI version
+	to 1 instead of 0.
+	* runtime/cilk-abi-cilk-for.cpp (cilk_for_recursive): Added a fix to
+	initialize stack frame correctly.
+

From-SVN: r207870

1 files changed, 10 insertions, 0 deletions

diff --git a/libcilkrts/runtime/cilk-abi-cilk-for.cpp b/libcilkrts/runtime/cilk-abi-cilk-for.cpp
index 4fa6dce..4cd04f5 100644
--- a/libcilkrts/runtime/cilk-abi-cilk-for.cpp
+++ b/libcilkrts/runtime/cilk-abi-cilk-for.cpp
@@ -256,9 +256,19 @@ tail_recurse:
         // argument list of the spawned function, hence the call to
         // capture_spawn_arg_stack_frame().
         __cilkrts_stack_frame *sf;
+#if defined(__GNUC__) && ! defined(__INTEL_COMPILER) && ! defined(__clang__)
+        // The current version of gcc initializes the sf structure eagerly.
+        // We can take advantage of this fact to avoid calling
+        // `capture_spawn_arg_stack_frame` when compiling with gcc.
+        // Remove this if the "shrink-wrap" optimization is implemented.
+        sf = w->current_stack_frame;
+        _Cilk_spawn cilk_for_recursive(low, mid, body, data, grain, w,
+                                       loop_root_pedigree);
+#else        
         _Cilk_spawn cilk_for_recursive(low, mid, body, data, grain,
                                        capture_spawn_arg_stack_frame(sf, w),
                                        loop_root_pedigree);
+#endif
         w = sf->worker;
         low = mid;