YJIT: Leave cfp->pc uninitialized for VM_FRAME_MAGIC_CFUNC

C function frames don't need to use the VM-specific pc field to run
properly. When pushing a control frame from output code, save one
instruction by leaving the field uninitialized.

Fix-up rb_vm_svar_lep(), which is used while setting local variables via
Regexp#=~. Use cfp->iseq as a secondary signal so it can stop assuming
that all CFUNC frames always have zero pc's.

0 files changed, 0 insertions, 0 deletions