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cselib.c (promote_debug_loc): Allow l->next non-NULL for cselib_preserve_constants.

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* cselib.c (promote_debug_loc): Allow l->next non-NULL for
	cselib_preserve_constants.
	(cselib_lookup_1): If cselib_preserve_constants,
	a new VALUE is being created for REG and there is a VALUE for the
	same register in wider mode, add another loc with lowpart SUBREG of
	the wider VALUE.
	(cselib_subst_to_values): Handle ENTRY_VALUE.
	* var-tracking.c  (replace_expr_with_values): Return NULL for
	ENTRY_VALUE too.
	* dwarf2out.c (convert_descriptor_to_signed): New function.
	(mem_loc_descriptor) <case ZERO_EXTEND>: Optimize using DW_OP_and
	instead of two shifts.
	(mem_loc_descriptor) <do_shift>: ZERO_EXTEND second argument to
	the right mode if needed.
	(mem_loc_descriptor) <case MOD>: For typed ops just use DW_OP_mod.
	(mem_loc_descriptor) <case UNSIGNED_FIX>: Use
	convert_descriptor_to_signed.
	(mem_loc_descriptor) <case UDIV, CLZ, CTZ, FFS, POPCOUNT, PARITY,
	BSWAP, ROTATE, ROTATERT>: Handle these rtls.

	* gcc.dg/guality/bswaptest.c: New test.
	* gcc.dg/guality/clztest.c: New test.
	* gcc.dg/guality/ctztest.c: New test.
	* gcc.dg/guality/rotatetest.c: New test.

From-SVN: r174508
This commit is contained in:
Jakub Jelinek 2011-05-31 21:14:21 +02:00 committed by Jakub Jelinek
parent 7351d8da1b
commit 509f4495ee
9 changed files with 686 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
gcc/ChangeLog
View File

@ -1,5 +1,25 @@
2011-05-31 Jakub Jelinek <jakub@redhat.com>
* cselib.c (promote_debug_loc): Allow l->next non-NULL for
cselib_preserve_constants.
(cselib_lookup_1): If cselib_preserve_constants,
a new VALUE is being created for REG and there is a VALUE for the
same register in wider mode, add another loc with lowpart SUBREG of
the wider VALUE.
(cselib_subst_to_values): Handle ENTRY_VALUE.
* var-tracking.c (replace_expr_with_values): Return NULL for
ENTRY_VALUE too.
* dwarf2out.c (convert_descriptor_to_signed): New function.
(mem_loc_descriptor) <case ZERO_EXTEND>: Optimize using DW_OP_and
instead of two shifts.
(mem_loc_descriptor) <do_shift>: ZERO_EXTEND second argument to
the right mode if needed.
(mem_loc_descriptor) <case MOD>: For typed ops just use DW_OP_mod.
(mem_loc_descriptor) <case UNSIGNED_FIX>: Use
convert_descriptor_to_signed.
(mem_loc_descriptor) <case UDIV, CLZ, CTZ, FFS, POPCOUNT, PARITY,
BSWAP, ROTATE, ROTATERT>: Handle these rtls.
PR target/48688
* config/i386/i386.md (*lea_general_4): New define_insn_and_split.

45
gcc/cselib.c
View File

@ -257,7 +257,7 @@ promote_debug_loc (struct elt_loc_list *l)
{
n_debug_values--;
l->setting_insn = cselib_current_insn;
gcc_assert (!l->next);
gcc_assert (!l->next || cselib_preserve_constants);
}
}
@ -1719,6 +1719,12 @@ cselib_subst_to_values (rtx x, enum machine_mode memmode)
}
return e->val_rtx;
case ENTRY_VALUE:
e = cselib_lookup (x, GET_MODE (x), 0, memmode);
if (! e)
break;
return e->val_rtx;
case CONST_DOUBLE:
case CONST_VECTOR:
case CONST_INT:
@ -1843,6 +1849,43 @@ cselib_lookup_1 (rtx x, enum machine_mode mode,
used_regs[n_used_regs++] = i;
REG_VALUES (i) = new_elt_list (REG_VALUES (i), NULL);
}
else if (cselib_preserve_constants
&& GET_MODE_CLASS (mode) == MODE_INT)
{
/* During var-tracking, try harder to find equivalences
for SUBREGs. If a setter sets say a DImode register
and user uses that register only in SImode, add a lowpart
subreg location. */
struct elt_list *lwider = NULL;
l = REG_VALUES (i);
if (l && l->elt == NULL)
l = l->next;
for (; l; l = l->next)
if (GET_MODE_CLASS (GET_MODE (l->elt->val_rtx)) == MODE_INT
&& GET_MODE_SIZE (GET_MODE (l->elt->val_rtx))
> GET_MODE_SIZE (mode)
&& (lwider == NULL
|| GET_MODE_SIZE (GET_MODE (l->elt->val_rtx))
< GET_MODE_SIZE (GET_MODE (lwider->elt->val_rtx))))
{
struct elt_loc_list *el;
if (i < FIRST_PSEUDO_REGISTER
&& hard_regno_nregs[i][GET_MODE (l->elt->val_rtx)] != 1)
continue;
for (el = l->elt->locs; el; el = el->next)
if (!REG_P (el->loc))
break;
if (el)
lwider = l;
}
if (lwider)
{
rtx sub = lowpart_subreg (mode, lwider->elt->val_rtx,
GET_MODE (lwider->elt->val_rtx));
if (sub)
e->locs->next = new_elt_loc_list (e->locs->next, sub);
}
}
REG_VALUES (i)->next = new_elt_list (REG_VALUES (i)->next, e);
slot = cselib_find_slot (x, e->hash, INSERT, memmode);
*slot = e;

470
gcc/dwarf2out.c
View File

@ -13824,6 +13824,37 @@ base_type_for_mode (enum machine_mode mode, bool unsignedp)
return type_die;
}
/* For OP descriptor assumed to be in unsigned MODE, convert it to a signed
type matching MODE, or, if MODE is narrower than DWARF2_ADDR_SIZE, signed
type matching DWARF2_ADDR_SIZE. Return NULL if the conversion is not
possible. */
static dw_loc_descr_ref
convert_descriptor_to_signed (enum machine_mode mode, dw_loc_descr_ref op)
{
enum machine_mode outer_mode = mode;
dw_die_ref type_die;
dw_loc_descr_ref cvt;
if (GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE)
{
outer_mode = mode_for_size (DWARF2_ADDR_SIZE * BITS_PER_UNIT,
MODE_INT, 0);
if (outer_mode == BLKmode
|| GET_MODE_SIZE (outer_mode) != DWARF2_ADDR_SIZE)
return NULL;
}
type_die = base_type_for_mode (outer_mode, 0);
if (type_die == NULL)
return NULL;
cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
add_loc_descr (&op, cvt);
return op;
}
/* The following routine converts the RTL for a variable or parameter
(resident in memory) into an equivalent Dwarf representation of a
mechanism for getting the address of that same variable onto the top of a
@ -13986,6 +14017,21 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
mem_mode, VAR_INIT_STATUS_INITIALIZED);
if (op0 == 0)
break;
else if (GET_CODE (rtl) == ZERO_EXTEND
&& GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
&& GET_MODE_BITSIZE (GET_MODE (XEXP (rtl, 0)))
< HOST_BITS_PER_WIDE_INT
/* If DW_OP_const{1,2,4}u won't be used, it is shorter
to expand zero extend as two shifts instead of
masking. */
&& GET_MODE_SIZE (GET_MODE (XEXP (rtl, 0))) <= 4)
{
enum machine_mode imode = GET_MODE (XEXP (rtl, 0));
mem_loc_result = op0;
add_loc_descr (&mem_loc_result,
int_loc_descriptor (GET_MODE_MASK (imode)));
add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_and, 0, 0));
}
else if (GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE)
{
int shift = DWARF2_ADDR_SIZE
@ -14239,10 +14285,15 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
do_shift:
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
op1 = mem_loc_descriptor (XEXP (rtl, 1),
GET_MODE (XEXP (rtl, 1)) == VOIDmode
? mode : GET_MODE (XEXP (rtl, 1)), mem_mode,
VAR_INIT_STATUS_INITIALIZED);
{
rtx rtlop1 = XEXP (rtl, 1);
if (GET_MODE (rtlop1) != VOIDmode
&& GET_MODE_BITSIZE (GET_MODE (rtlop1))
< GET_MODE_BITSIZE (mode))
rtlop1 = gen_rtx_ZERO_EXTEND (mode, rtlop1);
op1 = mem_loc_descriptor (rtlop1, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
}
if (op0 == 0 || op1 == 0)
break;
@ -14279,6 +14330,16 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
break;
case MOD:
if (GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE && !dwarf_strict)
{
/* If MODE is wider than DWARF2_ADDR_SIZE, mem_loc_descriptor
should return signed typed values and therefore DW_OP_mod
won't be unsigned as it defaults for untyped stack values,
but signed. */
op = DW_OP_mod;
goto do_binop;
}
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
@ -14296,6 +14357,38 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_minus, 0, 0));
break;
case UDIV:
if (!dwarf_strict && GET_MODE_CLASS (mode) == MODE_INT)
{
dw_die_ref type_die;
dw_loc_descr_ref cvt;
type_die = base_type_for_mode (mode, 1);
if (type_die == NULL)
break;
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op0 == 0 || op1 == 0)
break;
cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
add_loc_descr (&op0, cvt);
cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
add_loc_descr (&op1, cvt);
mem_loc_result = op0;
add_loc_descr (&mem_loc_result, op1);
add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_div, 0, 0));
mem_loc_result = convert_descriptor_to_signed (mode, mem_loc_result);
}
break;
case NOT:
op = DW_OP_not;
goto do_unop;
@ -14812,31 +14905,359 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
&& (GET_CODE (rtl) == UNSIGNED_FIX
|| GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE))
{
enum machine_mode outer_mode = mode;
if (GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE)
{
outer_mode = mode_for_size (DWARF2_ADDR_SIZE * BITS_PER_UNIT,
MODE_INT, 0);
if (outer_mode == BLKmode
|| GET_MODE_SIZE (outer_mode) != DWARF2_ADDR_SIZE)
break;
}
type_die = base_type_for_mode (outer_mode, 0);
if (type_die == NULL)
op0 = convert_descriptor_to_signed (mode, op0);
if (op0 == NULL)
break;
cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
add_loc_descr (&op0, cvt);
}
mem_loc_result = op0;
}
break;
case COMPARE:
case CLZ:
case CTZ:
case FFS:
/* CLZ (where constV is CLZ_DEFINED_VALUE_AT_ZERO computed value,
const0 is DW_OP_lit0 or corresponding typed constant,
const1 is DW_OP_lit1 or corresponding typed constant
and constMSB is constant with just the MSB bit set
for the mode):
DW_OP_dup DW_OP_bra <L1> DW_OP_drop constV DW_OP_skip <L4>
L1: const0 DW_OP_swap
L2: DW_OP_dup constMSB DW_OP_and DW_OP_bra <L3> const1 DW_OP_shl
DW_OP_swap DW_OP_plus_uconst <1> DW_OP_swap DW_OP_skip <L2>
L3: DW_OP_drop
L4: DW_OP_nop
CTZ is similar:
DW_OP_dup DW_OP_bra <L1> DW_OP_drop constV DW_OP_skip <L4>
L1: const0 DW_OP_swap
L2: DW_OP_dup const1 DW_OP_and DW_OP_bra <L3> const1 DW_OP_shr
DW_OP_swap DW_OP_plus_uconst <1> DW_OP_swap DW_OP_skip <L2>
L3: DW_OP_drop
L4: DW_OP_nop
FFS is similar:
DW_OP_dup DW_OP_bra <L1> DW_OP_drop const0 DW_OP_skip <L4>
L1: const1 DW_OP_swap
L2: DW_OP_dup const1 DW_OP_and DW_OP_bra <L3> const1 DW_OP_shr
DW_OP_swap DW_OP_plus_uconst <1> DW_OP_swap DW_OP_skip <L2>
L3: DW_OP_drop
L4: DW_OP_nop */
if (GET_MODE_CLASS (mode) == MODE_INT
&& GET_MODE (XEXP (rtl, 0)) == mode
&& (GET_CODE (rtl) != CLZ
|| GET_MODE_BITSIZE (mode) <= 2 * HOST_BITS_PER_WIDE_INT))
{
HOST_WIDE_INT valv;
dw_loc_descr_ref l1jump, l1label;
dw_loc_descr_ref l2jump, l2label;
dw_loc_descr_ref l3jump, l3label;
dw_loc_descr_ref l4jump, l4label;
rtx msb;
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op0 == NULL)
break;
if (GET_CODE (rtl) == CLZ)
{
if (!CLZ_DEFINED_VALUE_AT_ZERO (mode, valv))
valv = GET_MODE_BITSIZE (mode);
}
else if (GET_CODE (rtl) == FFS)
valv = 0;
else if (!CTZ_DEFINED_VALUE_AT_ZERO (mode, valv))
valv = GET_MODE_BITSIZE (mode);
add_loc_descr (&op0, new_loc_descr (DW_OP_dup, 0, 0));
l1jump = new_loc_descr (DW_OP_bra, 0, 0);
add_loc_descr (&op0, l1jump);
add_loc_descr (&op0, new_loc_descr (DW_OP_drop, 0, 0));
op1 = mem_loc_descriptor (GEN_INT (valv), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
l4jump = new_loc_descr (DW_OP_skip, 0, 0);
add_loc_descr (&op0, l4jump);
l1label = mem_loc_descriptor (GET_CODE (rtl) == FFS
? const1_rtx : const0_rtx,
mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (l1label == NULL)
break;
add_loc_descr (&op0, l1label);
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
l2label = new_loc_descr (DW_OP_dup, 0, 0);
add_loc_descr (&op0, l2label);
if (GET_CODE (rtl) != CLZ)
msb = const1_rtx;
else if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT)
msb = GEN_INT ((unsigned HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (mode) - 1));
else
msb = immed_double_const (0, (unsigned HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (mode)
- HOST_BITS_PER_WIDE_INT - 1),
mode);
if (GET_CODE (msb) == CONST_INT && INTVAL (msb) < 0)
op1 = new_loc_descr (HOST_BITS_PER_WIDE_INT == 32
? DW_OP_const4u
: HOST_BITS_PER_WIDE_INT == 64
? DW_OP_const8u : DW_OP_constu,
INTVAL (msb), 0);
else
op1 = mem_loc_descriptor (msb, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_and, 0, 0));
l3jump = new_loc_descr (DW_OP_bra, 0, 0);
add_loc_descr (&op0, l3jump);
op1 = mem_loc_descriptor (const1_rtx, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (GET_CODE (rtl) == CLZ
? DW_OP_shl : DW_OP_shr, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_plus_uconst, 1, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
l2jump = new_loc_descr (DW_OP_skip, 0, 0);
add_loc_descr (&op0, l2jump);
l3label = new_loc_descr (DW_OP_drop, 0, 0);
add_loc_descr (&op0, l3label);
l4label = new_loc_descr (DW_OP_nop, 0, 0);
add_loc_descr (&op0, l4label);
l1jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l1jump->dw_loc_oprnd1.v.val_loc = l1label;
l2jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l2jump->dw_loc_oprnd1.v.val_loc = l2label;
l3jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l3jump->dw_loc_oprnd1.v.val_loc = l3label;
l4jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l4jump->dw_loc_oprnd1.v.val_loc = l4label;
mem_loc_result = op0;
}
break;
case POPCOUNT:
case PARITY:
/* POPCOUNT (const0 is DW_OP_lit0 or corresponding typed constant,
const1 is DW_OP_lit1 or corresponding typed constant):
const0 DW_OP_swap
L1: DW_OP_dup DW_OP_bra <L2> DW_OP_dup DW_OP_rot const1 DW_OP_and
DW_OP_plus DW_OP_swap const1 DW_OP_shr DW_OP_skip <L1>
L2: DW_OP_drop
PARITY is similar:
L1: DW_OP_dup DW_OP_bra <L2> DW_OP_dup DW_OP_rot const1 DW_OP_and
DW_OP_xor DW_OP_swap const1 DW_OP_shr DW_OP_skip <L1>
L2: DW_OP_drop */
if (GET_MODE_CLASS (mode) == MODE_INT
&& GET_MODE (XEXP (rtl, 0)) == mode)
{
dw_loc_descr_ref l1jump, l1label;
dw_loc_descr_ref l2jump, l2label;
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op0 == NULL)
break;
op1 = mem_loc_descriptor (const0_rtx, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
l1label = new_loc_descr (DW_OP_dup, 0, 0);
add_loc_descr (&op0, l1label);
l2jump = new_loc_descr (DW_OP_bra, 0, 0);
add_loc_descr (&op0, l2jump);
add_loc_descr (&op0, new_loc_descr (DW_OP_dup, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_rot, 0, 0));
op1 = mem_loc_descriptor (const1_rtx, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_and, 0, 0));
add_loc_descr (&op0, new_loc_descr (GET_CODE (rtl) == POPCOUNT
? DW_OP_plus : DW_OP_xor, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
op1 = mem_loc_descriptor (const1_rtx, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_shr, 0, 0));
l1jump = new_loc_descr (DW_OP_skip, 0, 0);
add_loc_descr (&op0, l1jump);
l2label = new_loc_descr (DW_OP_drop, 0, 0);
add_loc_descr (&op0, l2label);
l1jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l1jump->dw_loc_oprnd1.v.val_loc = l1label;
l2jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l2jump->dw_loc_oprnd1.v.val_loc = l2label;
mem_loc_result = op0;
}
break;
case BSWAP:
/* BSWAP (constS is initial shift count, either 56 or 24):
constS const0
L1: DW_OP_pick <2> constS DW_OP_pick <3> DW_OP_minus DW_OP_shr
const255 DW_OP_and DW_OP_pick <2> DW_OP_shl DW_OP_or
DW_OP_swap DW_OP_dup const0 DW_OP_eq DW_OP_bra <L2> const8
DW_OP_minus DW_OP_swap DW_OP_skip <L1>
L2: DW_OP_drop DW_OP_swap DW_OP_drop */
if (GET_MODE_CLASS (mode) == MODE_INT
&& BITS_PER_UNIT == 8
&& (GET_MODE_BITSIZE (mode) == 32
|| GET_MODE_BITSIZE (mode) == 64))
{
dw_loc_descr_ref l1jump, l1label;
dw_loc_descr_ref l2jump, l2label;
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op0 == NULL)
break;
op1 = mem_loc_descriptor (GEN_INT (GET_MODE_BITSIZE (mode) - 8),
mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
op1 = mem_loc_descriptor (const0_rtx, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
l1label = new_loc_descr (DW_OP_pick, 2, 0);
add_loc_descr (&op0, l1label);
op1 = mem_loc_descriptor (GEN_INT (GET_MODE_BITSIZE (mode) - 8),
mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_pick, 3, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_minus, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_shr, 0, 0));
op1 = mem_loc_descriptor (GEN_INT (255), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op1 == NULL)
break;
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_and, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_pick, 2, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_shl, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_or, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_dup, 0, 0));
op1 = mem_loc_descriptor (const0_rtx, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_eq, 0, 0));
l2jump = new_loc_descr (DW_OP_bra, 0, 0);
add_loc_descr (&op0, l2jump);
op1 = mem_loc_descriptor (GEN_INT (8), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_minus, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
l1jump = new_loc_descr (DW_OP_skip, 0, 0);
add_loc_descr (&op0, l1jump);
l2label = new_loc_descr (DW_OP_drop, 0, 0);
add_loc_descr (&op0, l2label);
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_drop, 0, 0));
l1jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l1jump->dw_loc_oprnd1.v.val_loc = l1label;
l2jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
l2jump->dw_loc_oprnd1.v.val_loc = l2label;
mem_loc_result = op0;
}
break;
case ROTATE:
case ROTATERT:
/* ROTATE (constMASK is mode mask, BITSIZE is bitsize of mode):
DW_OP_over DW_OP_over DW_OP_shl [ constMASK DW_OP_and ] DW_OP_rot
[ DW_OP_swap constMASK DW_OP_and DW_OP_swap ] DW_OP_neg
DW_OP_plus_uconst <BITSIZE> DW_OP_shr DW_OP_or
ROTATERT is similar:
DW_OP_over DW_OP_over DW_OP_neg DW_OP_plus_uconst <BITSIZE>
DW_OP_shl [ constMASK DW_OP_and ] DW_OP_rot
[ DW_OP_swap constMASK DW_OP_and DW_OP_swap ] DW_OP_shr DW_OP_or
*/
if (GET_MODE_CLASS (mode) == MODE_INT)
{
rtx rtlop1 = XEXP (rtl, 1);
dw_loc_descr_ref mask[2] = { NULL, NULL };
int i;
if (GET_MODE (rtlop1) != VOIDmode
&& GET_MODE_BITSIZE (GET_MODE (rtlop1))
< GET_MODE_BITSIZE (mode))
rtlop1 = gen_rtx_ZERO_EXTEND (mode, rtlop1);
op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
op1 = mem_loc_descriptor (rtlop1, mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
if (op0 == NULL || op1 == NULL)
break;
if (GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE)
for (i = 0; i < 2; i++)
{
if (GET_MODE_BITSIZE (mode) < HOST_BITS_PER_WIDE_INT)
mask[i] = mem_loc_descriptor (GEN_INT (GET_MODE_MASK (mode)),
mode, mem_mode,
VAR_INIT_STATUS_INITIALIZED);
else if (GET_MODE_BITSIZE (mode) == HOST_BITS_PER_WIDE_INT)
mask[i] = new_loc_descr (HOST_BITS_PER_WIDE_INT == 32
? DW_OP_const4u
: HOST_BITS_PER_WIDE_INT == 64
? DW_OP_const8u : DW_OP_constu,
GET_MODE_MASK (mode), 0);
else
mask[i] = NULL;
if (mask[i] == NULL)
return NULL;
add_loc_descr (&mask[i], new_loc_descr (DW_OP_and, 0, 0));
}
add_loc_descr (&op0, op1);
add_loc_descr (&op0, new_loc_descr (DW_OP_over, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_over, 0, 0));
if (GET_CODE (rtl) == ROTATERT)
{
add_loc_descr (&op0, new_loc_descr (DW_OP_neg, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_plus_uconst,
GET_MODE_BITSIZE (mode), 0));
}
add_loc_descr (&op0, new_loc_descr (DW_OP_shl, 0, 0));
if (mask[0] != NULL)
add_loc_descr (&op0, mask[0]);
add_loc_descr (&op0, new_loc_descr (DW_OP_rot, 0, 0));
if (mask[1] != NULL)
{
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
add_loc_descr (&op0, mask[1]);
add_loc_descr (&op0, new_loc_descr (DW_OP_swap, 0, 0));
}
if (GET_CODE (rtl) == ROTATE)
{
add_loc_descr (&op0, new_loc_descr (DW_OP_neg, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_plus_uconst,
GET_MODE_BITSIZE (mode), 0));
}
add_loc_descr (&op0, new_loc_descr (DW_OP_shr, 0, 0));
add_loc_descr (&op0, new_loc_descr (DW_OP_or, 0, 0));
mem_loc_result = op0;
}
break;
case COMPARE:
case TRUNCATE:
/* In theory, we could implement the above. */
/* DWARF cannot represent the unsigned compare operations
@ -14856,7 +15277,6 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
case US_ASHIFT:
case SS_TRUNCATE:
case US_TRUNCATE:
case UDIV:
case UNORDERED:
case ORDERED:
case UNEQ:
@ -14870,12 +15290,6 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
case SAT_FRACT:
case UNSIGNED_SAT_FRACT:
case SQRT:
case BSWAP:
case FFS:
case CLZ:
case CTZ:
case POPCOUNT:
case PARITY:
case ASM_OPERANDS:
case VEC_MERGE:
case VEC_SELECT:

5
gcc/testsuite/ChangeLog
View File

@ -1,5 +1,10 @@
2011-05-31 Jakub Jelinek <jakub@redhat.com>
* gcc.dg/guality/bswaptest.c: New test.
* gcc.dg/guality/clztest.c: New test.
* gcc.dg/guality/ctztest.c: New test.
* gcc.dg/guality/rotatetest.c: New test.
PR target/48688
* gcc.target/i386/pr48688.c: New test.

32
gcc/testsuite/gcc.dg/guality/bswaptest.c Normal file
View File

@ -0,0 +1,32 @@
/* { dg-do run { target { x86_64-*-* && lp64 } } } */
/* { dg-options "-g" } */
volatile int vv;
__attribute__((noclone, noinline)) long
foo (long x)
{
long f = __builtin_bswap64 (x);
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 12 "g" "f" } } */
return f;
}
__attribute__((noclone, noinline)) int
bar (int x)
{
int f = __builtin_bswap32 (x);
int g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 22 "g" "f" } } */
return f;
}
int
main ()
{
foo (0x123456789abcde0fUL);
bar (0x12345678);
return 0;
}

33
gcc/testsuite/gcc.dg/guality/clztest.c Normal file
View File

@ -0,0 +1,33 @@
/* { dg-do run { target { x86_64-*-* && lp64 } } } */
/* { dg-options "-g" } */
volatile int vv;
__attribute__((noinline, noclone)) long
foo (long x)
{
long f = __builtin_clzl (x);
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 12 "g" "f" } } */
return f;
}
__attribute__((noinline, noclone)) long
bar (long x)
{
long f = __builtin_clzl (x);
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 22 "g" "f" } } */
return f;
}
int
main ()
{
long x = vv;
foo (x + 0x123456UL);
bar (x + 0x7fffffffUL);
return 0;
}

33
gcc/testsuite/gcc.dg/guality/ctztest.c Normal file
View File

@ -0,0 +1,33 @@
/* { dg-do run { target { x86_64-*-* && lp64 } } } */
/* { dg-options "-g" } */
volatile int vv;
__attribute__((noinline, noclone)) long
foo (long x)
{
long f = __builtin_ctzl (x);
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 12 "g" "f" } } */
return f;
}
__attribute__((noinline, noclone)) long
bar (long x)
{
long f = __builtin_ctzl (x);
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 22 "g" "f" } } */
return f;
}
int
main ()
{
long x = vv;
foo (x + 0x1234560UL);
bar (x + 0x7fff8000UL);
return 0;
}

76
gcc/testsuite/gcc.dg/guality/rotatetest.c Normal file
View File

@ -0,0 +1,76 @@
/* { dg-do run { target { x86_64-*-* && lp64 } } } */
/* { dg-options "-g" } */
volatile int vv;
__attribute__((noclone, noinline)) long
f1 (unsigned long x)
{
long f = (x << 12) | (x >> (64 - 12));
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 12 "g" "f" } } */
return f;
}
__attribute__((noclone, noinline)) long
f2 (unsigned long x, int y)
{
long f = (x << y) | (x >> (64 - y));
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 22 "g" "f" } } */
return f;
}
__attribute__((noclone, noinline)) long
f3 (unsigned long x, int y)
{
long f = (x >> y) | (x << (64 - y));
long g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 32 "g" "f" } } */
return f;
}
__attribute__((noclone, noinline)) unsigned int
f4 (unsigned int x)
{
unsigned int f = (x << 12) | (x >> (32 - 12));
unsigned int g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 42 "g" "f" } } */
return f;
}
__attribute__((noclone, noinline)) unsigned int
f5 (unsigned int x, int y)
{
unsigned int f = (x << y) | (x >> (64 - y));
unsigned int g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 52 "g" "f" } } */
return f;
}
__attribute__((noclone, noinline)) unsigned int
f6 (unsigned int x, int y)
{
unsigned int f = (x >> y) | (x << (64 - y));
unsigned int g = f;
asm volatile ("" : "+r" (f));
vv++; /* { dg-final { gdb-test 62 "g" "f" } } */
return f;
}
int
main ()
{
f1 (0x123456789abcde0fUL);
f2 (0x123456789abcde0fUL, 18);
f3 (0x123456789abcde0fUL, 17);
f4 (0x12345678);
f5 (0x12345678, 18);
f6 (0x12345678, 17);
return 0;
}

2
gcc/var-tracking.c
View File

@ -4837,7 +4837,7 @@ get_address_mode (rtx mem)
static rtx
replace_expr_with_values (rtx loc)
{
if (REG_P (loc))
if (REG_P (loc) || GET_CODE (loc) == ENTRY_VALUE)
return NULL;
else if (MEM_P (loc))
{