Merge pull request #2786 from furunkel/set_value

Avoid unnecessary stores and reloads

include/mruby/boxing_nan.h

@@ -61,7 +61,6 @@ typedef struct mrb_value {
 #define mrb_symbol(o)   (o).value.sym
 
 #define BOXNAN_SET_VALUE(o, tt, attr, v) do {\
-  (o).value.ttt = (0xfff00000|(((tt)+1)<<14));\
   switch (tt) {\
   case MRB_TT_FALSE:\
   case MRB_TT_TRUE:\
@@ -70,6 +69,7 @@ typedef struct mrb_value {
   case MRB_TT_SYMBOL: (o).attr = (v); break;\
   default: (o).value.i = 0; (o).value.p = (void*)((uintptr_t)(o).value.p | (((uintptr_t)(v))>>2)); break;\
   }\
+  (o).value.ttt = (0xfff00000|(((tt)+1)<<14));\
 } while (0)
 
 #define SET_FLOAT_VALUE(mrb,r,v) do { \

include/mruby/boxing_word.h

@@ -92,15 +92,13 @@ mrb_type(mrb_value o)
 #define mrb_nil_p(o)  ((o).w == MRB_Qnil)
 
 #define BOXWORD_SET_VALUE(o, ttt, attr, v) do {\
-  (o).w = 0;\
-  (o).attr = (v);\
   switch (ttt) {\
   case MRB_TT_FALSE:  (o).w = (v) ? MRB_Qfalse : MRB_Qnil; break;\
   case MRB_TT_TRUE:   (o).w = MRB_Qtrue; break;\
   case MRB_TT_UNDEF:  (o).w = MRB_Qundef; break;\
-  case MRB_TT_FIXNUM: (o).value.i_flag = MRB_FIXNUM_FLAG; break;\
-  case MRB_TT_SYMBOL: (o).value.sym_flag = MRB_SYMBOL_FLAG; break;\
-  default:            if ((o).value.bp) (o).value.bp->tt = ttt; break;\
+  case MRB_TT_FIXNUM: (o).value.i_flag = MRB_FIXNUM_FLAG; (o).attr = (v); break;\
+  case MRB_TT_SYMBOL: (o).value.sym_flag = MRB_SYMBOL_FLAG; (o).attr = (v); break;\
+  default:            (o).w = 0; (o).attr = (v); if ((o).value.bp) (o).value.bp->tt = ttt; break;\
   }\
 } while (0)