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double-int.h (double_int_and): New. 

* double-int.h (double_int_and): New.
	* combine.c (try_combine): Clean up, use double_int_* and
	immed_double_int_const functions.

From-SVN: r159842
This commit is contained in:
Anatoly Sokolov 2010-05-25 23:48:40 +04:00 committed by Anatoly Sokolov
parent bc492e47c8
commit e233a3b258
3 changed files with 26 additions and 64 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2010-05-25 Anatoly Sokolov <aesok@post.ru>
* double-int.h (double_int_and): New.
* combine.c (try_combine): Clean up, use double_int_* and
immed_double_int_const functions.
2010-05-25 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* configure.ac (gcc_cv_as_ld_jalr_reloc): Redirect grep stdout,

74
gcc/combine.c
View File

@ -2595,74 +2595,20 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p)
if (offset >= 0
&& (GET_MODE_BITSIZE (GET_MODE (SET_DEST (temp)))
<= HOST_BITS_PER_WIDE_INT * 2))
<= HOST_BITS_PER_DOUBLE_INT))
{
HOST_WIDE_INT mhi, ohi, ihi;
HOST_WIDE_INT mlo, olo, ilo;
double_int m, o, i;
rtx inner = SET_SRC (PATTERN (i3));
rtx outer = SET_SRC (temp);
if (CONST_INT_P (outer))
{
olo = INTVAL (outer);
ohi = olo < 0 ? -1 : 0;
}
else
{
olo = CONST_DOUBLE_LOW (outer);
ohi = CONST_DOUBLE_HIGH (outer);
}
o = rtx_to_double_int (outer);
i = rtx_to_double_int (inner);
if (CONST_INT_P (inner))
{
ilo = INTVAL (inner);
ihi = ilo < 0 ? -1 : 0;
}
else
{
ilo = CONST_DOUBLE_LOW (inner);
ihi = CONST_DOUBLE_HIGH (inner);
}
if (width < HOST_BITS_PER_WIDE_INT)
{
mlo = ((unsigned HOST_WIDE_INT) 1 << width) - 1;
mhi = 0;
}
else if (width < HOST_BITS_PER_WIDE_INT * 2)
{
mhi = ((unsigned HOST_WIDE_INT) 1
<< (width - HOST_BITS_PER_WIDE_INT)) - 1;
mlo = -1;
}
else
{
mlo = -1;
mhi = -1;
}
ilo &= mlo;
ihi &= mhi;
if (offset >= HOST_BITS_PER_WIDE_INT)
{
mhi = mlo << (offset - HOST_BITS_PER_WIDE_INT);
mlo = 0;
ihi = ilo << (offset - HOST_BITS_PER_WIDE_INT);
ilo = 0;
}
else if (offset > 0)
{
mhi = (mhi << offset) | ((unsigned HOST_WIDE_INT) mlo
>> (HOST_BITS_PER_WIDE_INT - offset));
mlo = mlo << offset;
ihi = (ihi << offset) | ((unsigned HOST_WIDE_INT) ilo
>> (HOST_BITS_PER_WIDE_INT - offset));
ilo = ilo << offset;
}
olo = (olo & ~mlo) | ilo;
ohi = (ohi & ~mhi) | ihi;
m = double_int_mask (width);
i = double_int_and (i, m);
m = double_int_lshift (m, offset, HOST_BITS_PER_DOUBLE_INT, false);
i = double_int_lshift (i, offset, HOST_BITS_PER_DOUBLE_INT, false);
o = double_int_ior (double_int_and (o, double_int_not (m)), i);
combine_merges++;
subst_insn = i3;
@ -2675,7 +2621,7 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p)
resulting insn the new pattern for I3. Then skip to where we
validate the pattern. Everything was set up above. */
SUBST (SET_SRC (temp),
immed_double_const (olo, ohi, GET_MODE (SET_DEST (temp))));
immed_double_int_const (o, GET_MODE (SET_DEST (temp))));
newpat = PATTERN (i2);

10
gcc/double-int.h
View File

@ -147,6 +147,16 @@ double_int_ior (double_int a, double_int b)
return a;
}
/* Returns A & B. */
static inline double_int
double_int_and (double_int a, double_int b)
{
a.low &= b.low;
a.high &= b.high;
return a;
}
/* Shift operations. */
double_int double_int_lshift (double_int, HOST_WIDE_INT, unsigned int, bool);
double_int double_int_rshift (double_int, HOST_WIDE_INT, unsigned int, bool);