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vm: add OP_TDEF/OP_SDEF for fused method definition

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TDEF fuses TCLASS+METHOD+DEF for normal method definitions.
SDEF fuses SCLASS+METHOD+DEF for singleton method definitions.
Saves 4 bytes per method definition (8 bytes -> 4 bytes).
Falls back to unfused instructions if irep index exceeds 255.

Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2026-01-20 13:02:06 +09:00
parent 51e8da6614
commit 48a88ed79b
4 changed files with 68 additions and 12 deletions
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src/codedump.c
+6
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@@ -427,6 +427,12 @@ codedump(mrb_state *mrb, const mrb_irep *irep, FILE *out)
CASE(OP_DEF, BB):
fprintf(out, "DEF\t\tR%d\t:%s\t(R%d)\n", a, mrb_sym_dump(mrb, irep->syms[b]),a+1);
break;
CASE(OP_TDEF, BBB):
fprintf(out, "TDEF\t\tR%d\t:%s\tI[%d]\n", a, mrb_sym_dump(mrb, irep->syms[b]), c);
break;
CASE(OP_SDEF, BBB):
fprintf(out, "SDEF\t\tR%d\t:%s\tI[%d]\n", a, mrb_sym_dump(mrb, irep->syms[b]), c);
break;
CASE(OP_UNDEF, B):
fprintf(out, "UNDEF\t\t:%s\n", mrb_sym_dump(mrb, irep->syms[a]));
break;