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fr30.md (movdi): Do not accept immediates as the destination of this insn.

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* config/fr30/fr30.md (movdi): Do not accept immediates as the destination of this insn.
* config/fr30/fr30.c (fr30_move_double): Use emit_move_insn rather than calling gen_rtx_SET directly.
  Use r0 to hold the value of 'address + 4' rather than a stack based temporary which can be
  mis-optimized away.

From-SVN: r123326
This commit is contained in:
Lars Poeschel 2007-03-29 10:23:27 +00:00 committed by Nick Clifton
parent 833cd70a0c
commit ed31d14caf
3 changed files with 36 additions and 25 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2007-03-29 Lars Poeschel <larsi@wh2.tu-dresden.de>
* config/fr30/fr30.md (movdi): Do not accept immediates as the
destination of this insn.
* config/fr30/fr30.c (fr30_move_double): Use emit_move_insn rather
than calling gen_rtx_SET directly. Use r0 to hold the value of
'address + 4' rather than a stack based temporary which can be
mis-optimized away.
2007-03-29 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/s390.c (s390_secondary_input_reload_class,

26
gcc/config/fr30/fr30.c
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@ -1,5 +1,5 @@
/* FR30 specific functions.
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2005
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2007
Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
@ -894,8 +894,7 @@ fr30_move_double (rtx * operands)
src0 = operand_subword (src, 0, TRUE, mode);
src1 = operand_subword (src, 1, TRUE, mode);
emit_insn (gen_rtx_SET (VOIDmode, adjust_address (dest, SImode, 0),
src0));
emit_move_insn (adjust_address (dest, SImode, 0), src0);
if (REGNO (addr) == STACK_POINTER_REGNUM
|| REGNO (addr) == FRAME_POINTER_REGNUM)
@ -905,19 +904,19 @@ fr30_move_double (rtx * operands)
else
{
rtx new_mem;
rtx scratch_reg_r0 = gen_rtx_REG (SImode, 0);
/* We need a scratch register to hold the value of 'address + 4'.
We ought to allow gcc to find one for us, but for now, just
push one of the source registers. */
emit_insn (gen_movsi_push (src0));
emit_insn (gen_movsi_internal (src0, addr));
emit_insn (gen_addsi_small_int (src0, src0, GEN_INT (UNITS_PER_WORD)));
new_mem = gen_rtx_MEM (SImode, src0);
We use r0 for this purpose. It is used for example for long
jumps and is already marked to not be used by normal register
allocation. */
emit_insn (gen_movsi_internal (scratch_reg_r0, addr));
emit_insn (gen_addsi_small_int (scratch_reg_r0, scratch_reg_r0,
GEN_INT (UNITS_PER_WORD)));
new_mem = gen_rtx_MEM (SImode, scratch_reg_r0);
MEM_COPY_ATTRIBUTES (new_mem, dest);
emit_insn (gen_rtx_SET (VOIDmode, new_mem, src1));
emit_insn (gen_movsi_pop (src0));
emit_move_insn (new_mem, src1);
emit_insn (gen_blockage ());
}
}
else
@ -929,6 +928,7 @@ fr30_move_double (rtx * operands)
return val;
}
/*}}}*/
/* Local Variables: */
/* folded-file: t */

10
gcc/config/fr30/fr30.md
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@ -1,5 +1,5 @@
;; FR30 machine description.
;; Copyright (C) 1998, 1999, 2000, 2002, 2004, 2005
;; Copyright (C) 1998, 1999, 2000, 2002, 2004, 2005, 2007
;; Free Software Foundation, Inc.
;; Contributed by Cygnus Solutions.
@ -380,7 +380,7 @@
;; (This code is stolen from the M32R port.)
(define_expand "movdi"
[(set (match_operand:DI 0 "general_operand" "")
[(set (match_operand:DI 0 "nonimmediate_operand" "")
(match_operand:DI 1 "general_operand" ""))]
""
"
@ -388,7 +388,8 @@
if (GET_CODE (operands[0]) == MEM)
operands[1] = force_reg (DImode, operands[1]);
")
"
)
;; We use an insn and a split so that we can generate
;; RTL rather than text from fr30_move_double().
@ -406,7 +407,8 @@
(match_operand:DI 1 "di_operand" ""))]
"reload_completed"
[(match_dup 2)]
"operands[2] = fr30_move_double (operands);")
"operands[2] = fr30_move_double (operands);"
)
;;}}}
;;{{{ Load & Store Multiple Registers