More scaffolding: strengthen the return types from the various emit_
functions from rtx to rtx_insn * (or to the rtx_barrier * subclass in a
few cases).
These will ultimately have their params strengthened also, but we
postpone that until much later in the patch series. So for now there
are also various checked casts to ensure we really got an insn when
returning such params back.
Doing so requires a minor tweak to config/sh/sh.c
gcc/
* emit-rtl.h (emit_copy_of_insn_after): Strengthen return type
from rtx to rtx_insn *.
* rtl.h (emit_insn_before): Likewise.
(emit_insn_before_noloc): Likewise.
(emit_insn_before_setloc): Likewise.
(emit_jump_insn_before): Likewise.
(emit_jump_insn_before_noloc): Likewise.
(emit_jump_insn_before_setloc): Likewise.
(emit_call_insn_before): Likewise.
(emit_call_insn_before_noloc): Likewise.
(emit_call_insn_before_setloc): Likewise.
(emit_debug_insn_before): Likewise.
(emit_debug_insn_before_noloc): Likewise.
(emit_debug_insn_before_setloc): Likewise.
(emit_label_before): Likewise.
(emit_insn_after): Likewise.
(emit_insn_after_noloc): Likewise.
(emit_insn_after_setloc): Likewise.
(emit_jump_insn_after): Likewise.
(emit_jump_insn_after_noloc): Likewise.
(emit_jump_insn_after_setloc): Likewise.
(emit_call_insn_after): Likewise.
(emit_call_insn_after_noloc): Likewise.
(emit_call_insn_after_setloc): Likewise.
(emit_debug_insn_after): Likewise.
(emit_debug_insn_after_noloc): Likewise.
(emit_debug_insn_after_setloc): Likewise.
(emit_label_after): Likewise.
(emit_insn): Likewise.
(emit_debug_insn): Likewise.
(emit_jump_insn): Likewise.
(emit_call_insn): Likewise.
(emit_label): Likewise.
(gen_clobber): Likewise.
(emit_clobber): Likewise.
(gen_use): Likewise.
(emit_use): Likewise.
(emit): Likewise.
(emit_barrier_before): Strengthen return type from rtx to
rtx_barrier *.
(emit_barrier_after): Likewise.
(emit_barrier): Likewise.
* emit-rtl.c (emit_pattern_before_noloc): Strengthen return type
from rtx to rtx_insn *. Add checked casts for now when converting
"last" from rtx to rtx_insn *.
(emit_insn_before_noloc): Likewise for return type.
(emit_jump_insn_before_noloc): Likewise.
(emit_call_insn_before_noloc): Likewise.
(emit_debug_insn_before_noloc): Likewise.
(emit_barrier_before): Strengthen return type and local "insn"
from rtx to rtx_barrier *.
(emit_label_before): Strengthen return type from rtx to
rtx_insn *. Add checked cast for now when returning param
(emit_pattern_after_noloc): Strengthen return type from rtx to
rtx_insn *. Add checked casts for now when converting "last" from
rtx to rtx_insn *.
(emit_insn_after_noloc): Strengthen return type from rtx to
rtx_insn *.
(emit_jump_insn_after_noloc): Likewise.
(emit_call_insn_after_noloc): Likewise.
(emit_debug_insn_after_noloc): Likewise.
(emit_barrier_after): Strengthen return type from rtx to
rtx_barrier *.
(emit_label_after): Strengthen return type from rtx to rtx_insn *.
Add checked cast for now when converting "label" from rtx to
rtx_insn *.
(emit_pattern_after_setloc): Strengthen return type from rtx to
rtx_insn *. Add checked casts for now when converting "last" from
rtx to rtx_insn *.
(emit_pattern_after): Strengthen return type from rtx to
rtx_insn *.
(emit_insn_after_setloc): Likewise.
(emit_insn_after): Likewise.
(emit_jump_insn_after_setloc): Likewise.
(emit_jump_insn_after): Likewise.
(emit_call_insn_after_setloc): Likewise.
(emit_call_insn_after): Likewise.
(emit_debug_insn_after_setloc): Likewise.
(emit_debug_insn_after): Likewise.
(emit_pattern_before_setloc): Likewise. Add checked casts for now
when converting "last" from rtx to rtx_insn *.
(emit_pattern_before): Strengthen return type from rtx to
rtx_insn *.
(emit_insn_before_setloc): Likewise.
(emit_insn_before): Likewise.
(emit_jump_insn_before_setloc): Likewise.
(emit_jump_insn_before): Likewise.
(emit_call_insn_before_setloc): Likewise.
(emit_call_insn_before): Likewise.
(emit_debug_insn_before_setloc): Likewise.
(emit_debug_insn_before): Likewise.
(emit_insn): Strengthen return type and locals "last", "insn",
"next" from rtx to rtx_insn *. Add checked cast to rtx_insn
within cases where we know we have an insn.
(emit_debug_insn): Likewise.
(emit_jump_insn): Likewise.
(emit_call_insn): Strengthen return type and local "insn" from rtx
to rtx_insn *.
(emit_label): Strengthen return type from rtx to rtx_insn *. Add
a checked cast to rtx_insn * for now on "label".
(emit_barrier): Strengthen return type from rtx to rtx_barrier *.
(emit_clobber): Strengthen return type from rtx to rtx_insn *.
(emit_use): Likewise.
(gen_use): Likewise, also for local "seq".
(emit): Likewise for return type and local "insn".
(rtx_insn): Likewise for return type and local "new_rtx".
* cfgrtl.c (emit_barrier_after_bb): Strengthen local "barrier"
from rtx to rtx_barrier *.
* config/sh/sh.c (output_stack_adjust): Since emit_insn has
changed return type from rtx to rtx_insn *, we must update
"emit_fn" type, and this in turn means updating...
(frame_insn): ...this. Strengthen return type from rtx to
rtx_insn *. Introduce a new local "insn" of the appropriate type.