AVR: Tidy pass avr-fuse-add.

gcc/
	* config/avr/avr-protos.h (avr_split_tiny_move): Rename to
	avr_split_fake_addressing_move.
	* config/avr/avr-passes.def: Same.
	* config/avr/avr-passes.cc: Same.
	(avr_pass_data_fuse_add) <tv_id>: Set to TV_MACH_DEP.
	* config/avr/avr.md (split-lpmx): Remove a define_split.  Such
	splits are performed by avr_split_fake_addressing_move.

gcc/config/avr/avr-passes.cc

@@ -1009,7 +1009,7 @@ static const pass_data avr_pass_data_fuse_add =
   RTL_PASS,	    // type
   "",		    // name (will be patched)
   OPTGROUP_NONE,    // optinfo_flags
-  TV_DF_SCAN,	    // tv_id
+  TV_MACH_DEP,	    // tv_id
   0,		    // properties_required
   0,		    // properties_provided
   0,		    // properties_destroyed
@@ -1503,8 +1503,8 @@ avr_pass_fuse_add::fuse_mem_add (Mem_Insn &mem, Add_Insn &add)
    - PLUS insn of that kind.
    - Indirect loads and stores.
    In almost all cases, combine opportunities arise from the preparation
-   done by `avr_split_tiny_move', but in some rare cases combinations are
-   found for the ordinary cores, too.
+   done by `avr_split_fake_addressing_move', but in some rare cases combinations
+   are found for the ordinary cores, too.
       As we consider at most one Mem insn per try, there may still be missed
    optimizations like  POST_INC + PLUS + POST_INC  might be performed
    as  PRE_DEC + PRE_DEC  for two adjacent locations.  */
@@ -1714,7 +1714,7 @@ public:
    core's capabilities.  This sets the stage for pass .avr-fuse-add.  */
 
 bool
-avr_split_tiny_move (rtx_insn * /*insn*/, rtx *xop)
+avr_split_fake_addressing_move (rtx_insn * /*insn*/, rtx *xop)
 {
   bool store_p = false;
   rtx mem, reg_or_0;

gcc/config/avr/avr-passes.def

@@ -20,9 +20,9 @@
 /* A post reload optimization pass that fuses PLUS insns with CONST_INT
    addend with a load or store insn to get POST_INC or PRE_DEC addressing.
    It can also fuse two PLUSes to a single one, which may occur due to
-   splits from `avr_split_tiny_move'.  We do this in an own pass because
-   it can find more cases than peephole2, for example when there are
-   unrelated insns between the interesting ones.  */
+   splits from `avr_split_fake_addressing_move'.  We do this in an own
+   pass because it can find more cases than peephole2, for example when
+   there are unrelated insns between the interesting ones.  */
 
 INSERT_PASS_BEFORE (pass_peephole2, 1, avr_pass_fuse_add);
 
@@ -47,9 +47,9 @@ INSERT_PASS_BEFORE (pass_free_cfg, 1, avr_pass_recompute_notes);
    tries to fix such situations by operating on the original mode.  This
    reduces code size and register pressure.
 
-   The assertion is that the code generated by casesi is unaltered and a
+   The assertion is that the code generated by casesi is unaltered and
    a sign-extend or zero-extend from QImode or HImode precedes the casesi
-   insns withaout any insns in between.  */
+   insns without any insns in between.  */
 
 INSERT_PASS_AFTER (pass_expand, 1, avr_pass_casesi);
 

gcc/config/avr/avr-protos.h

@@ -179,7 +179,7 @@ extern rtl_opt_pass *make_avr_pass_casesi (gcc::context *);
 extern rtl_opt_pass *make_avr_pass_ifelse (gcc::context *);
 #ifdef RTX_CODE
 extern bool avr_casei_sequence_check_operands (rtx *xop);
-extern bool avr_split_tiny_move (rtx_insn *insn, rtx *operands);
+extern bool avr_split_fake_addressing_move (rtx_insn *insn, rtx *operands);
 #endif /* RTX_CODE */
 
 /* From avr-log.cc */

gcc/config/avr/avr.md

@@ -993,41 +993,10 @@
               (clobber (reg:CC REG_CC))])])
 
 
-;; For LPM loads from AS1 we split
-;;    R = *Z
-;; to
-;;    R = *Z++
-;;    Z = Z - sizeof (R)
-;;
-;; so that the second instruction can be optimized out.
-
-(define_split ; "split-lpmx"
-  [(set (match_operand:HISI 0 "register_operand" "")
-        (match_operand:HISI 1 "memory_operand" ""))]
-  "reload_completed
-   && AVR_HAVE_LPMX
-   && avr_mem_flash_p (operands[1])
-   && REG_P (XEXP (operands[1], 0))
-   && !reg_overlap_mentioned_p (XEXP (operands[1], 0), operands[0])"
-  [(set (match_dup 0)
-        (match_dup 2))
-   (set (match_dup 3)
-        (plus:HI (match_dup 3)
-                 (match_dup 4)))]
-  {
-     rtx addr = XEXP (operands[1], 0);
-
-    operands[2] = replace_equiv_address (operands[1],
-                                         gen_rtx_POST_INC (Pmode, addr));
-    operands[3] = addr;
-    operands[4] = gen_int_mode (-<SIZE>, HImode);
-  })
-
-
 ;; Legitimate address and stuff allows way more addressing modes than
 ;; Reduced Tiny actually supports.  Split them now so that we get
 ;; closer to real instructions which may result in some optimization
-;; opportunities.
+;; opportunities.  This applies also to fake X + offset addressing.
 (define_split
   [(parallel [(set (match_operand:MOVMODE 0 "nonimmediate_operand")
                    (match_operand:MOVMODE 1 "general_operand"))
@@ -1040,7 +1009,7 @@
    && (MEM_P (operands[0]) || MEM_P (operands[1]))"
   [(scratch)]
   {
-    if (avr_split_tiny_move (curr_insn, operands))
+    if (avr_split_fake_addressing_move (curr_insn, operands))
       DONE;
     FAIL;
   })