Use ID instead of GENTRY for gvars. (#3278)

Use ID instead of GENTRY for gvars.

Global variables are compiled into GENTRY (a pointer to struct
rb_global_entry). This patch replace this GENTRY to ID and
make the code simple.

We need to search GENTRY from ID every time (st_lookup), so
additional overhead will be introduced.
However, the performance of accessing global variables is not
important now a day and this simplicity helps Ractor development.

1 files changed, 0 insertions, 12 deletions

diff --git a/iseq.c b/iseq.c
index 956bd2a697..e6568a6a2e 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1946,12 +1946,6 @@ rb_insn_operand_intern(const rb_iseq_t *iseq,
 	    }
 	    break;
 	}
-      case TS_GENTRY:
-	{
-	    struct rb_global_entry *entry = (struct rb_global_entry *)op;
-	    ret = rb_str_dup(rb_id2str(entry->id));
-	}
-	break;
 
       case TS_IC:
       case TS_IVC:
@@ -2776,12 +2770,6 @@ iseq_data_to_ary(const rb_iseq_t *iseq)
 		    }
 		}
 		break;
-	      case TS_GENTRY:
-		{
-		    struct rb_global_entry *entry = (struct rb_global_entry *)*seq;
-		    rb_ary_push(ary, ID2SYM(entry->id));
-		}
-		break;
 	      case TS_IC:
               case TS_IVC:
 	      case TS_ISE: