Make range literal peephole optimization target "newrange"

It looks for "checkmatch", when it could be applied to anything that has
"newrange".

Making the optimization target more ranges might only be fair play when
all ranges are frozen. So I'm putting a reference to the ticket that
froze all ranges.

[Feature #15504]

1 files changed, 3 insertions, 4 deletions

diff --git a/compile.c b/compile.c
index 44fb53cefd..e8d5d0514f 100644
--- a/compile.c
+++ b/compile.c
@@ -3027,13 +3027,12 @@ iseq_peephole_optimize(rb_iseq_t *iseq, LINK_ELEMENT *list, const int do_tailcal
      *
      * putobject "beg".."end"
      */
-    if (IS_INSN_ID(iobj, checkmatch)) {
-        INSN *range = (INSN *)get_prev_insn(iobj);
+    if (IS_INSN_ID(iobj, newrange)) {
+        INSN *const range = iobj;
         INSN *beg, *end;
         VALUE str_beg, str_end;
 
-	if (range && IS_INSN_ID(range, newrange) &&
-                (end = (INSN *)get_prev_insn(range)) != 0 &&
+        if ((end = (INSN *)get_prev_insn(range)) != 0 &&
                 is_frozen_putstring(end, &str_end) &&
                 (beg = (INSN *)get_prev_insn(end)) != 0 &&
                 is_frozen_putstring(beg, &str_beg)) {