ops.h: add `OP_ARYPUSH_N` instruction.

Add n elements at once. Reduces instructions for huge array
initialization. In addition, `gen_value` function in `codegen.c` was
refactored and clarified.

2 files changed, 12 insertions, 1 deletions

diff --git a/src/codedump.c b/src/codedump.c
index 87faa589c..3128d7467 100644
--- a/src/codedump.c
+++ b/src/codedump.c
@@ -428,13 +428,17 @@ codedump(mrb_state *mrb, const mrb_irep *irep)
       print_lv_ab(mrb, irep, a, b);
       break;
     CASE(OP_ARYCAT, B):
-      printf("OP_ARYCAT\tR%d\t", a);
+      printf("OP_ARYCAT\tR%d\tR%d\t", a, a+1);
       print_lv_a(mrb, irep, a);
       break;
     CASE(OP_ARYPUSH, B):
       printf("OP_ARYPUSH\tR%d\t", a);
       print_lv_a(mrb, irep, a);
       break;
+    CASE(OP_ARYPUSH_N, BB):
+      printf("OP_ARYPUSH_N\tR%d\t%d\t", a, b);
+      print_lv_a(mrb, irep, a);
+      break;
     CASE(OP_ARYDUP, B):
       printf("OP_ARYDUP\tR%d\t", a);
       print_lv_a(mrb, irep, a);
diff --git a/src/vm.c b/src/vm.c
index 95458774b..5690684cb 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -2551,6 +2551,13 @@ RETRY_TRY_BLOCK:
       NEXT;
     }
 
+    CASE(OP_ARYPUSH_N, BB) {
+      for (mrb_int i=0; i<b; i++) {
+        mrb_ary_push(mrb, regs[a], regs[a+i+1]);
+      }
+      NEXT;
+    }
+
     CASE(OP_ARYDUP, B) {
       mrb_value ary = regs[a];
       if (mrb_array_p(ary)) {