mruby/ops.h: add new instructions `OP_GETIDX` and `OP_SETIDX`.

Which represent `obj[int]` and `obj[int]=val` respectively where `obj`
is either `string`, `array` or `hash`, so that index access could be
faster. When `obj` is not assumed type or `R(a+1)` is not integer, the
instructions fallback to method calls.

1 files changed, 4 insertions, 0 deletions

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 42c93debf..a142d21ad 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -832,6 +832,10 @@ static mrb_bool
 gen_binop(codegen_scope *s, mrb_sym op, uint16_t dst)
 {
   if (no_peephole(s)) return FALSE;
+  else if (op == MRB_OPSYM_2(s->mrb, aref)) {
+    genop_1(s, OP_GETIDX, dst);
+    return TRUE;
+  }
   else {
     struct mrb_insn_data data = mrb_last_insn(s);
     mrb_int n, n0;