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rs6000.c (rs6000_emit_set_const): Inline multi-instruction SImode constant.

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* config/rs6000/rs6000.c (rs6000_emit_set_const): Inline
        multi-instruction SImode constant.  Add REG_EQUAL note.
        * config/rs6000/rs6000.md (movsi splitter): Use
        rs6000_emit_set_const.

From-SVN: r56439
This commit is contained in:
David Edelsohn 2002-08-19 16:32:54 +00:00 committed by David Edelsohn
parent 9bc146b368
commit af8cb5c5e8
3 changed files with 48 additions and 14 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2002-08-19 David Edelsohn <edelsohn@gnu.org>
* config/rs6000/rs6000.c (rs6000_emit_set_const): Inline
multi-instruction SImode constant. Add REG_EQUAL note.
* config/rs6000/rs6000.md (movsi splitter): Use
rs6000_emit_set_const.
2002-08-19 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* tree-inline.c (initialize_inlined_parameters): Wrap variable in

46
gcc/config/rs6000/rs6000.c
View File

@ -2368,35 +2368,59 @@ rs6000_emit_set_const (dest, mode, source, n)
enum machine_mode mode;
int n ATTRIBUTE_UNUSED;
{
rtx result, insn, set;
HOST_WIDE_INT c0, c1;
if (mode == QImode || mode == HImode || mode == SImode)
if (mode == QImode || mode == HImode)
{
if (dest == NULL)
dest = gen_reg_rtx (mode);
emit_insn (gen_rtx_SET (VOIDmode, dest, source));
return dest;
}
else if (mode == SImode)
{
result = no_new_pseudos ? dest : gen_reg_rtx (SImode);
if (GET_CODE (source) == CONST_INT)
{
c0 = INTVAL (source);
c1 = -(c0 < 0);
emit_insn (gen_rtx_SET (VOIDmode, result,
GEN_INT (INTVAL (source)
& (~ (HOST_WIDE_INT) 0xffff))));
emit_insn (gen_rtx_SET (VOIDmode, dest,
gen_rtx_IOR (SImode, result,
GEN_INT (INTVAL (source) & 0xffff))));
result = dest;
}
else if (GET_CODE (source) == CONST_DOUBLE)
else if (mode == DImode)
{
if (GET_CODE (source) == CONST_INT)
{
c0 = INTVAL (source);
c1 = -(c0 < 0);
}
else if (GET_CODE (source) == CONST_DOUBLE)
{
#if HOST_BITS_PER_WIDE_INT >= 64
c0 = CONST_DOUBLE_LOW (source);
c1 = -(c0 < 0);
c0 = CONST_DOUBLE_LOW (source);
c1 = -(c0 < 0);
#else
c0 = CONST_DOUBLE_LOW (source);
c1 = CONST_DOUBLE_HIGH (source);
c0 = CONST_DOUBLE_LOW (source);
c1 = CONST_DOUBLE_HIGH (source);
#endif
}
else
abort ();
result = rs6000_emit_set_long_const (dest, c0, c1);
}
else
abort ();
return rs6000_emit_set_long_const (dest, c0, c1);
insn = get_last_insn ();
set = single_set (insn);
if (! CONSTANT_P (SET_SRC (set)))
set_unique_reg_note (insn, REG_EQUAL, source);
return result;
}
/* Having failed to find a 3 insn sequence in rs6000_emit_set_const,

9
gcc/config/rs6000/rs6000.md
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@ -8215,9 +8215,12 @@
(ior:SI (match_dup 0)
(match_dup 3)))]
"
{
operands[2] = GEN_INT (INTVAL (operands[1]) & (~ (HOST_WIDE_INT) 0xffff));
operands[3] = GEN_INT (INTVAL (operands[1]) & 0xffff);
{ rtx tem = rs6000_emit_set_const (operands[0], SImode, operands[1], 2);
if (tem == operands[0])
DONE;
else
FAIL;
}")
(define_insn "*movsi_internal2"