* vm_insnhelper.c: introduce new call handler for simple ISeqs.

  vm_call_iseq_setup_normal_0start() is simple, however it has
  some loops/conditions depends on ISeq::param.size and
  ISeq::local_size (in vm_push_frame(), inlined into this function).

  There are many simple methods which has a few parameters and local
  variables. So that this patch introduces several special functions
  generated in vm_call_iseq_optimized.inc by
  tool/mk_call_iseq_optimized.rb.

  This script makes
    vm_call_iseq_setup_normal_0start_Xparams_Ylocals()
  where X is 0 to 3 and Y is 1 to 6 (as current setting).
  In this case, X * Y = 24 functions are created.

  These functions creates fast method dispatch by inlining
  vm_push_frame() with immediate params/locals sizes.

  On my laptop, we can have the following results.

  vm2_method*       1.083 (8.3% faster)
  vm2_poly_method*  0.961 (3.4% slower)

  It shows 8.3% faster for inner loop method dispatch (hit inline
  cache), but 3.4% slower when inline cache miss because we need
  to find a suitable call handler.

* common.mk: add a rule for vm_call_iseq_optimized.inc.

* tool/mk_call_iseq_optimized.rb: added.

* vm.c: include vm_call_iseq_optimized.inc.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52254 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/vm.c b/vm.c
index 755c28f2da..d22e696857 100644
--- a/vm.c
+++ b/vm.c
@@ -3111,3 +3111,5 @@ vm_collect_usage_register(int reg, int isset)
 	(*ruby_vm_collect_usage_func_register)(reg, isset);
 }
 #endif
+
+#include "vm_call_iseq_optimized.inc" /* required from vm_insnhelper.c */