hash.c: revert r43870 and add alternative parser patch for literal keys

* hash.c (hash_aset_str): revert r43870 due to performance issue
  [Bug #9188] [ruby-core:58730]
* parse.y (assoc): convert literal string hash keys to fstrings
* test/ruby/test_hash.rb (class TestHash): expand test

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44058 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index 2a0c5c64f7..d04cf45612 100644
--- a/parse.y
+++ b/parse.y
@@ -4912,6 +4912,10 @@ assocs		: assoc
 assoc		: arg_value tASSOC arg_value
 		    {
 		    /*%%%*/
+			if (nd_type($1) == NODE_STR) {
+			    nd_set_type($1, NODE_LIT);
+			    $1->nd_lit = rb_fstring($1->nd_lit);
+			}
 			$$ = list_append(NEW_LIST($1), $3);
 		    /*%
 			$$ = dispatch2(assoc_new, $1, $3);