OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

combine.c (RTL_HOOKS_GEN_LOWPART_NO_EMIT): Use gen_lowpart_for_combine.

Browse Source 
2004-04-05  Paolo Bonzini  <bonzini@gnu.org>

	* combine.c (RTL_HOOKS_GEN_LOWPART_NO_EMIT): Use
	gen_lowpart_for_combine.
	* cse.c (gen_lowpart_if_possible): Move...
	* rtlhooks.c (gen_lowpart_if_possible): ... here.  Also try
	gen_lowpart_SUBREG.
	(gen_lowpart_no_emit_general): Use it.

From-SVN: r97633
This commit is contained in:
Paolo Bonzini 2005-04-05 14:50:35 +00:00 committed by Paolo Bonzini
parent c81739f769
commit bf66727567
4 changed files with 61 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2004-04-05 Paolo Bonzini <bonzini@gnu.org>
* combine.c (RTL_HOOKS_GEN_LOWPART_NO_EMIT): Use
gen_lowpart_for_combine.
* cse.c (gen_lowpart_if_possible): Move...
* rtlhooks.c (gen_lowpart_if_possible): ... here. Also try
gen_lowpart_SUBREG.
(gen_lowpart_no_emit_general): Use it.
2005-04-05 Eric Botcazou <ebotcazou@libertysurf.fr>
* config/sparc/sparc.c (TARGET_ASM_FILE_END): Undefine before

4
gcc/combine.c
View File

@ -422,6 +422,10 @@ static bool unmentioned_reg_p (rtx, rtx);
#undef RTL_HOOKS_GEN_LOWPART
#define RTL_HOOKS_GEN_LOWPART gen_lowpart_for_combine
/* Our implementation of gen_lowpart never emits a new pseudo. */
#undef RTL_HOOKS_GEN_LOWPART_NO_EMIT
#define RTL_HOOKS_GEN_LOWPART_NO_EMIT gen_lowpart_for_combine
#undef RTL_HOOKS_REG_NONZERO_REG_BITS
#define RTL_HOOKS_REG_NONZERO_REG_BITS reg_nonzero_bits_for_combine

41
gcc/cse.c
View File

@ -4361,47 +4361,6 @@ equiv_constant (rtx x)
return 0;
}
/* Assuming that X is an rtx (e.g., MEM, REG or SUBREG) for a fixed-point
number, return an rtx (MEM, SUBREG, or CONST_INT) that refers to the
least-significant part of X.
MODE specifies how big a part of X to return.
If the requested operation cannot be done, 0 is returned.
This is similar to gen_lowpart_general in emit-rtl.c. */
rtx
gen_lowpart_if_possible (enum machine_mode mode, rtx x)
{
rtx result = gen_lowpart_common (mode, x);
if (result)
return result;
else if (MEM_P (x))
{
/* This is the only other case we handle. */
int offset = 0;
rtx new;
if (WORDS_BIG_ENDIAN)
offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD)
- MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD));
if (BYTES_BIG_ENDIAN)
/* Adjust the address so that the address-after-the-data is
unchanged. */
offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode))
- MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x))));
new = adjust_address_nv (x, mode, offset);
if (! memory_address_p (mode, XEXP (new, 0)))
return 0;
return new;
}
else
return 0;
}
/* Given INSN, a jump insn, PATH_TAKEN indicates if we are following the "taken"
branch. It will be zero if not.

52
gcc/rtlhooks.c
View File

@ -25,6 +25,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#include "rtl.h"
#include "rtlhooks-def.h"
#include "expr.h"
#include "recog.h"
/* For speed, we will copy the RTX hooks struct member-by-member
@ -84,12 +85,11 @@ gen_lowpart_general (enum machine_mode mode, rtx x)
rtx
gen_lowpart_no_emit_general (enum machine_mode mode, rtx x)
{
rtx result = gen_lowpart_common (mode, x);
rtx result = gen_lowpart_if_possible (mode, x);
if (result)
return result;
if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode)
return gen_lowpart_SUBREG (mode, x);
return x;
else
return x;
}
rtx
@ -113,3 +113,47 @@ reg_nonzero_bits_general (rtx x ATTRIBUTE_UNUSED,
{
return NULL;
}
/* Assuming that X is an rtx (e.g., MEM, REG or SUBREG) for a fixed-point
number, return an rtx (MEM, SUBREG, or CONST_INT) that refers to the
least-significant part of X.
MODE specifies how big a part of X to return.
If the requested operation cannot be done, 0 is returned.
This is similar to gen_lowpart_general. */
rtx
gen_lowpart_if_possible (enum machine_mode mode, rtx x)
{
rtx result = gen_lowpart_common (mode, x);
if (result)
return result;
else if (MEM_P (x))
{
/* This is the only other case we handle. */
int offset = 0;
rtx new;
if (WORDS_BIG_ENDIAN)
offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD)
- MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD));
if (BYTES_BIG_ENDIAN)
/* Adjust the address so that the address-after-the-data is
unchanged. */
offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode))
- MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x))));
new = adjust_address_nv (x, mode, offset);
if (! memory_address_p (mode, XEXP (new, 0)))
return 0;
return new;
}
else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode)
return gen_lowpart_SUBREG (mode, x);
else
return 0;
}