ZJIT: Fix clobbering register for `self` in gen_entry_params()

Previously, for 8+ params we wound up clobbering the self param when
putting the last param in memory in the JIT entry point:

    # ZJIT entry point: a@../test.rb:5
    <snip>
    ldur x0, [x19, #0x18]
    # set method params: 8
    ldur x1, [x21, #-0x58]
    ldur x2, [x21, #-0x50]
    ldur x3, [x21, #-0x48]
    ldur x4, [x21, #-0x40]
    ldur x5, [x21, #-0x38]
    ldur x11, [x21, #-0x30]
    ldur x12, [x21, #-0x28]
    ldur x0, [x21, #-0x20]
    stur x0, [sp, #-0x20]
    bl #0x11e17018c

Doing the memcpys for parameters in memory first avoids this clobbering.

    # set method params: 8
    ldur x0, [x21, #-0x20]
    stur x0, [sp, #-0x20]
    ldur x12, [x21, #-0x28]
    ldur x11, [x21, #-0x30]
    ldur x5, [x21, #-0x38]
    ldur x4, [x21, #-0x40]
    ldur x3, [x21, #-0x48]
    ldur x2, [x21, #-0x50]
    ldur x1, [x21, #-0x58]
    ldur x0, [x19, #0x18]

0 files changed, 0 insertions, 0 deletions