merge revision(s) 33edcc11,b4e438d8: [Backport #19483]

	YJIT: Protect strings from GC on String#<< (#7466)

	Fix https://github.com/Shopify/yjit/issues/310



	[Bug #19483]

Co-authored-by: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com>
Co-authored-by: Jimmy Miller <jimmy.miller@shopify.com>
	---
	 yjit/src/codegen.rs | 3 +++
	 1 file changed, 3 insertions(+)

	YJIT: Save PC on rb_str_concat (#7586)

	[Bug #19483]

Co-authored-by: Alan Wu <alansi.xingwu@shopify.com>
	---
	 test/ruby/test_yjit.rb | 19 +++++++++++++++++++
	 yjit/src/codegen.rs    |  6 ++++--
	 2 files changed, 23 insertions(+), 2 deletions(-)