* config/rs6000/rs6000.c (rs6000_emit_allocate_stack): Delete
unnecessary prototype. Replace copy_r12 and copy_r11 flag params
with copy_reg rtx param.
(rs6000_emit_prologue): Update rs6000_emit_allocate_stack calls.
Correct cases where code for ABI_V4 did not initialise the reg
used to access frame. Also leave frame_reg_rtx as sp for large
frames that save no regs.
From-SVN: r159483
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