YJIT: Break register cycles for C arguments (take 2) (#8018)

* Revert "Revert "YJIT: Break register cycles for C arguments (#7918)""

This reverts commit 78ca085785460de46bfc4851a898d525c1698ef8.

* Use shfited_live_ranges for the last-insn check

1 files changed, 8 insertions, 0 deletions

diff --git a/bootstraptest/test_yjit.rb b/bootstraptest/test_yjit.rb
index 8be24cfdb4..402b5c512a 100644
--- a/bootstraptest/test_yjit.rb
+++ b/bootstraptest/test_yjit.rb
@@ -3973,3 +3973,11 @@ assert_equal 'true', %q{
     true
   end
 } unless defined?(RubyVM::RJIT) && RubyVM::RJIT.enabled? # Not yet working on RJIT
+
+# Regresssion test: register allocator on expandarray
+assert_equal '[]', %q{
+  func = proc { [] }
+  proc do
+    _x, _y = func.call
+  end.call
+}