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Use lowpart_subreg instead of simplify_gen_subreg 

From-SVN: r226417
This commit is contained in:
Anatoly Sokolov 2015-07-31 00:25:29 +03:00 committed by Anatoly Sokolov
parent e8fa381741
commit 3403a1a959
8 changed files with 34 additions and 42 deletions
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13
gcc/ChangeLog
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@ -1,3 +1,16 @@
2015-07-30 Anatoly Sokolov <aesok@post.ru>
* rtl.h (lowpart_subreg): Move in file.
* loop-iv.c (lowpart_subreg): Move to...
* simplify-rtx.c (lowpart_subreg): ...here.
(simplify_binary_operation_1): Use lowpart_subreg instead of
simplify_gen_subreg.
* expr.c (expand_expr_real_2): Ditto.
* emit-rtl.c (gen_lowpart_common): Ditto.
* combine.c (gen_lowpart_for_combine): Ditto.
* cfgexpand.c (convert_debug_memory_address, expand_debug_expr,
expand_debug_source_expr): Ditto.
2015-07-30 Richard Sandiford <richard.sandiford@arm.com>
* builtins.c (HAVE_atomic_clear, gen_atomic_clear): Delete.

19
gcc/cfgexpand.c
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@ -3632,9 +3632,7 @@ convert_debug_memory_address (machine_mode mode, rtx x,
return x;
if (GET_MODE_PRECISION (mode) < GET_MODE_PRECISION (xmode))
x = simplify_gen_subreg (mode, x, xmode,
subreg_lowpart_offset
(mode, xmode));
x = lowpart_subreg (mode, x, xmode);
else if (POINTERS_EXTEND_UNSIGNED > 0)
x = gen_rtx_ZERO_EXTEND (mode, x);
else if (!POINTERS_EXTEND_UNSIGNED)
@ -3850,9 +3848,7 @@ expand_debug_expr (tree exp)
if (SCALAR_INT_MODE_P (opmode)
&& (GET_MODE_PRECISION (opmode)
< GET_MODE_PRECISION (inner_mode)))
op1 = simplify_gen_subreg (opmode, op1, inner_mode,
subreg_lowpart_offset (opmode,
inner_mode));
op1 = lowpart_subreg (opmode, op1, inner_mode);
}
break;
default:
@ -4011,9 +4007,7 @@ expand_debug_expr (tree exp)
}
else if (CONSTANT_P (op0)
|| GET_MODE_PRECISION (mode) <= GET_MODE_PRECISION (inner_mode))
op0 = simplify_gen_subreg (mode, op0, inner_mode,
subreg_lowpart_offset (mode,
inner_mode));
op0 = lowpart_subreg (mode, op0, inner_mode);
else if (UNARY_CLASS_P (exp)
? TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))
: unsignedp)
@ -4141,9 +4135,7 @@ expand_debug_expr (tree exp)
offmode = TYPE_MODE (TREE_TYPE (offset));
if (addrmode != offmode)
op1 = simplify_gen_subreg (addrmode, op1, offmode,
subreg_lowpart_offset (addrmode,
offmode));
op1 = lowpart_subreg (addrmode, op1, offmode);
/* Don't use offset_address here, we don't need a
recognizable address, and we don't want to generate
@ -4868,8 +4860,7 @@ expand_debug_source_expr (tree exp)
}
else if (CONSTANT_P (op0)
|| GET_MODE_BITSIZE (mode) <= GET_MODE_BITSIZE (inner_mode))
op0 = simplify_gen_subreg (mode, op0, inner_mode,
subreg_lowpart_offset (mode, inner_mode));
op0 = lowpart_subreg (mode, op0, inner_mode);
else if (TYPE_UNSIGNED (TREE_TYPE (exp)))
op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode);
else

4
gcc/combine.c
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@ -11194,10 +11194,8 @@ gen_lowpart_for_combine (machine_mode omode, rtx x)
include an explicit SUBREG or we may simplify it further in combine. */
else
{
int offset = 0;
rtx res;
offset = subreg_lowpart_offset (omode, imode);
if (imode == VOIDmode)
{
imode = int_mode_for_mode (omode);
@ -11205,7 +11203,7 @@ gen_lowpart_for_combine (machine_mode omode, rtx x)
if (x == NULL)
goto fail;
}
res = simplify_gen_subreg (omode, x, imode, offset);
res = lowpart_subreg (omode, x, imode);
if (res)
return res;
}

5
gcc/emit-rtl.c
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@ -1377,7 +1377,6 @@ gen_lowpart_common (machine_mode mode, rtx x)
{
int msize = GET_MODE_SIZE (mode);
int xsize;
int offset = 0;
machine_mode innermode;
/* Unfortunately, this routine doesn't take a parameter for the mode of X,
@ -1405,8 +1404,6 @@ gen_lowpart_common (machine_mode mode, rtx x)
if (SCALAR_FLOAT_MODE_P (mode) && msize > xsize)
return 0;
offset = subreg_lowpart_offset (mode, innermode);
if ((GET_CODE (x) == ZERO_EXTEND || GET_CODE (x) == SIGN_EXTEND)
&& (GET_MODE_CLASS (mode) == MODE_INT
|| GET_MODE_CLASS (mode) == MODE_PARTIAL_INT))
@ -1429,7 +1426,7 @@ gen_lowpart_common (machine_mode mode, rtx x)
else if (GET_CODE (x) == SUBREG || REG_P (x)
|| GET_CODE (x) == CONCAT || GET_CODE (x) == CONST_VECTOR
|| CONST_DOUBLE_AS_FLOAT_P (x) || CONST_SCALAR_INT_P (x))
return simplify_gen_subreg (mode, x, innermode, offset);
return lowpart_subreg (mode, x, innermode);
/* Otherwise, we can't do this. */
return 0;

4
gcc/expr.c
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@ -8137,9 +8137,7 @@ expand_expr_real_2 (sepops ops, rtx target, machine_mode tmode,
inner_mode = TYPE_MODE (inner_type);
if (modifier == EXPAND_INITIALIZER)
op0 = simplify_gen_subreg (mode, op0, inner_mode,
subreg_lowpart_offset (mode,
inner_mode));
op0 = lowpart_subreg (mode, op0, inner_mode);
else
op0= convert_modes (mode, inner_mode, op0,
TYPE_UNSIGNED (inner_type));

11
gcc/loop-iv.c
View File

@ -205,17 +205,6 @@ dump_iv_info (FILE *file, struct rtx_iv *iv)
fprintf (file, " (first special)");
}
/* Generates a subreg to get the least significant part of EXPR (in mode
INNER_MODE) to OUTER_MODE. */
rtx
lowpart_subreg (machine_mode outer_mode, rtx expr,
machine_mode inner_mode)
{
return simplify_gen_subreg (outer_mode, expr, inner_mode,
subreg_lowpart_offset (outer_mode, inner_mode));
}
static void
check_iv_ref_table_size (void)
{

5
gcc/rtl.h
View File

@ -2731,10 +2731,6 @@ extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
machine_mode);
#endif
/* In loop-iv.c */
extern rtx lowpart_subreg (machine_mode, rtx, machine_mode);
/* In varasm.c */
extern rtx force_const_mem (machine_mode, rtx);
@ -2866,6 +2862,7 @@ extern rtx simplify_subreg (machine_mode, rtx, machine_mode,
unsigned int);
extern rtx simplify_gen_subreg (machine_mode, rtx, machine_mode,
unsigned int);
extern rtx lowpart_subreg (machine_mode, rtx, machine_mode);
extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
rtx (*fn) (rtx, const_rtx, void *), void *);
extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);

15
gcc/simplify-rtx.c
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@ -3224,9 +3224,7 @@ simplify_binary_operation_1 (enum rtx_code code, machine_mode mode,
GET_MODE (SUBREG_REG (op0)),
XEXP (SUBREG_REG (op0), 0),
tmp);
return simplify_gen_subreg (mode, tmp, inner_mode,
subreg_lowpart_offset (mode,
inner_mode));
return lowpart_subreg (mode, tmp, inner_mode);
}
canonicalize_shift:
if (SHIFT_COUNT_TRUNCATED && CONST_INT_P (op1))
@ -6027,6 +6025,17 @@ simplify_gen_subreg (machine_mode outermode, rtx op,
return NULL_RTX;
}
/* Generates a subreg to get the least significant part of EXPR (in mode
INNER_MODE) to OUTER_MODE. */
rtx
lowpart_subreg (machine_mode outer_mode, rtx expr,
machine_mode inner_mode)
{
return simplify_gen_subreg (outer_mode, expr, inner_mode,
subreg_lowpart_offset (outer_mode, inner_mode));
}
/* Simplify X, an rtx expression.
Return the simplified expression or NULL if no simplifications