===================================================================
@@ -10343,8 +10343,6 @@ try_widen_shift_mode (enum rtx_code code
machine_mode orig_mode, machine_mode mode,
enum rtx_code outer_code, HOST_WIDE_INT outer_const)
{
- if (orig_mode == mode)
- return mode;
gcc_assert (GET_MODE_PRECISION (mode) > GET_MODE_PRECISION (orig_mode));
/* In general we can't perform in wider mode for right shift and rotate. */
@@ -10405,7 +10403,7 @@ simplify_shift_const_1 (enum rtx_code co
int count;
machine_mode mode = result_mode;
machine_mode shift_mode;
- scalar_int_mode tmode, inner_mode;
+ scalar_int_mode tmode, inner_mode, int_mode, int_varop_mode, int_result_mode;
unsigned int mode_words
= (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
/* We form (outer_op (code varop count) (outer_const)). */
@@ -10445,9 +10443,19 @@ simplify_shift_const_1 (enum rtx_code co
count = bitsize - count;
}
- shift_mode = try_widen_shift_mode (code, varop, count, result_mode,
- mode, outer_op, outer_const);
- machine_mode shift_unit_mode = GET_MODE_INNER (shift_mode);
+ shift_mode = result_mode;
+ if (shift_mode != mode)
+ {
+ /* We only change the modes of scalar shifts. */
+ int_mode = as_a <scalar_int_mode> (mode);
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
+ shift_mode = try_widen_shift_mode (code, varop, count,
+ int_result_mode, int_mode,
+ outer_op, outer_const);
+ }
+
+ scalar_int_mode shift_unit_mode
+ = as_a <scalar_int_mode> (GET_MODE_INNER (shift_mode));
/* Handle cases where the count is greater than the size of the mode
minus 1. For ASHIFT, use the size minus one as the count (this can
@@ -10542,6 +10550,7 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_mode = as_a <scalar_int_mode> (mode);
/* If we have (xshiftrt (mem ...) C) and C is MODE_WIDTH
minus the width of a smaller mode, we can do this with a
@@ -10550,15 +10559,15 @@ simplify_shift_const_1 (enum rtx_code co
&& ! mode_dependent_address_p (XEXP (varop, 0),
MEM_ADDR_SPACE (varop))
&& ! MEM_VOLATILE_P (varop)
- && (int_mode_for_size (GET_MODE_BITSIZE (mode) - count, 1)
+ && (int_mode_for_size (GET_MODE_BITSIZE (int_mode) - count, 1)
.exists (&tmode)))
{
new_rtx = adjust_address_nv (varop, tmode,
- BYTES_BIG_ENDIAN ? 0
- : count / BITS_PER_UNIT);
+ BYTES_BIG_ENDIAN ? 0
+ : count / BITS_PER_UNIT);
varop = gen_rtx_fmt_e (code == ASHIFTRT ? SIGN_EXTEND
- : ZERO_EXTEND, mode, new_rtx);
+ : ZERO_EXTEND, int_mode, new_rtx);
count = 0;
continue;
}
@@ -10568,20 +10577,22 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_mode = as_a <scalar_int_mode> (mode);
+ int_varop_mode = as_a <scalar_int_mode> (GET_MODE (varop));
/* If VAROP is a SUBREG, strip it as long as the inner operand has
the same number of words as what we've seen so far. Then store
the widest mode in MODE. */
if (subreg_lowpart_p (varop)
&& is_int_mode (GET_MODE (SUBREG_REG (varop)), &inner_mode)
- && GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (GET_MODE (varop))
+ && GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (int_varop_mode)
&& (unsigned int) ((GET_MODE_SIZE (inner_mode)
+ (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
== mode_words
- && GET_MODE_CLASS (GET_MODE (varop)) == MODE_INT)
+ && GET_MODE_CLASS (int_varop_mode) == MODE_INT)
{
varop = SUBREG_REG (varop);
- if (GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (mode))
+ if (GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (int_mode))
mode = inner_mode;
continue;
}
@@ -10640,14 +10651,17 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_mode = as_a <scalar_int_mode> (mode);
+ int_varop_mode = as_a <scalar_int_mode> (GET_MODE (varop));
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
/* Here we have two nested shifts. The result is usually the
AND of a new shift with a mask. We compute the result below. */
if (CONST_INT_P (XEXP (varop, 1))
&& INTVAL (XEXP (varop, 1)) >= 0
- && INTVAL (XEXP (varop, 1)) < GET_MODE_PRECISION (GET_MODE (varop))
- && HWI_COMPUTABLE_MODE_P (result_mode)
- && HWI_COMPUTABLE_MODE_P (mode))
+ && INTVAL (XEXP (varop, 1)) < GET_MODE_PRECISION (int_varop_mode)
+ && HWI_COMPUTABLE_MODE_P (int_result_mode)
+ && HWI_COMPUTABLE_MODE_P (int_mode))
{
enum rtx_code first_code = GET_CODE (varop);
unsigned int first_count = INTVAL (XEXP (varop, 1));
@@ -10662,18 +10676,18 @@ simplify_shift_const_1 (enum rtx_code co
(ashiftrt:M1 (ashift:M1 (and:M1 (subreg:M1 FOO 0) C3) C2) C1).
This simplifies certain SIGN_EXTEND operations. */
if (code == ASHIFT && first_code == ASHIFTRT
- && count == (GET_MODE_PRECISION (result_mode)
- - GET_MODE_PRECISION (GET_MODE (varop))))
+ && count == (GET_MODE_PRECISION (int_result_mode)
+ - GET_MODE_PRECISION (int_varop_mode)))
{
/* C3 has the low-order C1 bits zero. */
- mask = GET_MODE_MASK (mode)
+ mask = GET_MODE_MASK (int_mode)
& ~((HOST_WIDE_INT_1U << first_count) - 1);
- varop = simplify_and_const_int (NULL_RTX, result_mode,
+ varop = simplify_and_const_int (NULL_RTX, int_result_mode,
XEXP (varop, 0), mask);
- varop = simplify_shift_const (NULL_RTX, ASHIFT, result_mode,
- varop, count);
+ varop = simplify_shift_const (NULL_RTX, ASHIFT,
+ int_result_mode, varop, count);
count = first_count;
code = ASHIFTRT;
continue;
@@ -10684,11 +10698,11 @@ simplify_shift_const_1 (enum rtx_code co
this to either an ASHIFT or an ASHIFTRT depending on the
two counts.
- We cannot do this if VAROP's mode is not SHIFT_MODE. */
+ We cannot do this if VAROP's mode is not SHIFT_UNIT_MODE. */
if (code == ASHIFTRT && first_code == ASHIFT
- && GET_MODE (varop) == shift_mode
- && (num_sign_bit_copies (XEXP (varop, 0), shift_mode)
+ && int_varop_mode == shift_unit_mode
+ && (num_sign_bit_copies (XEXP (varop, 0), shift_unit_mode)
> first_count))
{
varop = XEXP (varop, 0);
@@ -10719,7 +10733,7 @@ simplify_shift_const_1 (enum rtx_code co
if (code == first_code)
{
- if (GET_MODE (varop) != result_mode
+ if (int_varop_mode != int_result_mode
&& (code == ASHIFTRT || code == LSHIFTRT
|| code == ROTATE))
break;
@@ -10731,8 +10745,8 @@ simplify_shift_const_1 (enum rtx_code co
if (code == ASHIFTRT
|| (code == ROTATE && first_code == ASHIFTRT)
- || GET_MODE_PRECISION (mode) > HOST_BITS_PER_WIDE_INT
- || (GET_MODE (varop) != result_mode
+ || GET_MODE_PRECISION (int_mode) > HOST_BITS_PER_WIDE_INT
+ || (int_varop_mode != int_result_mode
&& (first_code == ASHIFTRT || first_code == LSHIFTRT
|| first_code == ROTATE
|| code == ROTATE)))
@@ -10742,19 +10756,19 @@ simplify_shift_const_1 (enum rtx_code co
nonzero bits of the inner shift the same way the
outer shift will. */
- mask_rtx = gen_int_mode (nonzero_bits (varop, GET_MODE (varop)),
- result_mode);
+ mask_rtx = gen_int_mode (nonzero_bits (varop, int_varop_mode),
+ int_result_mode);
mask_rtx
- = simplify_const_binary_operation (code, result_mode, mask_rtx,
- GEN_INT (count));
+ = simplify_const_binary_operation (code, int_result_mode,
+ mask_rtx, GEN_INT (count));
/* Give up if we can't compute an outer operation to use. */
if (mask_rtx == 0
|| !CONST_INT_P (mask_rtx)
|| ! merge_outer_ops (&outer_op, &outer_const, AND,
INTVAL (mask_rtx),
- result_mode, &complement_p))
+ int_result_mode, &complement_p))
break;
/* If the shifts are in the same direction, we add the
@@ -10791,22 +10805,22 @@ simplify_shift_const_1 (enum rtx_code co
/* For ((unsigned) (cstULL >> count)) >> cst2 we have to make
sure the result will be masked. See PR70222. */
if (code == LSHIFTRT
- && mode != result_mode
+ && int_mode != int_result_mode
&& !merge_outer_ops (&outer_op, &outer_const, AND,
- GET_MODE_MASK (result_mode)
- >> orig_count, result_mode,
+ GET_MODE_MASK (int_result_mode)
+ >> orig_count, int_result_mode,
&complement_p))
break;
/* For ((int) (cstLL >> count)) >> cst2 just give up. Queuing
up outer sign extension (often left and right shift) is
hardly more efficient than the original. See PR70429. */
- if (code == ASHIFTRT && mode != result_mode)
+ if (code == ASHIFTRT && int_mode != int_result_mode)
break;
- rtx new_rtx = simplify_const_binary_operation (code, mode,
+ rtx new_rtx = simplify_const_binary_operation (code, int_mode,
XEXP (varop, 0),
GEN_INT (count));
- varop = gen_rtx_fmt_ee (code, mode, new_rtx, XEXP (varop, 1));
+ varop = gen_rtx_fmt_ee (code, int_mode, new_rtx, XEXP (varop, 1));
count = 0;
continue;
}
@@ -10827,6 +10841,8 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_varop_mode = as_a <scalar_int_mode> (GET_MODE (varop));
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
/* If we have (xshiftrt (ior (plus X (const_int -1)) X) C)
with C the size of VAROP - 1 and the shift is logical if
@@ -10839,15 +10855,15 @@ simplify_shift_const_1 (enum rtx_code co
&& XEXP (XEXP (varop, 0), 1) == constm1_rtx
&& (STORE_FLAG_VALUE == 1 || STORE_FLAG_VALUE == -1)
&& (code == LSHIFTRT || code == ASHIFTRT)
- && count == (GET_MODE_PRECISION (GET_MODE (varop)) - 1)
+ && count == (GET_MODE_PRECISION (int_varop_mode) - 1)
&& rtx_equal_p (XEXP (XEXP (varop, 0), 0), XEXP (varop, 1)))
{
count = 0;
- varop = gen_rtx_LE (GET_MODE (varop), XEXP (varop, 1),
+ varop = gen_rtx_LE (int_varop_mode, XEXP (varop, 1),
const0_rtx);
if (STORE_FLAG_VALUE == 1 ? code == ASHIFTRT : code == LSHIFTRT)
- varop = gen_rtx_NEG (GET_MODE (varop), varop);
+ varop = gen_rtx_NEG (int_varop_mode, varop);
continue;
}
@@ -10860,19 +10876,20 @@ simplify_shift_const_1 (enum rtx_code co
if (CONST_INT_P (XEXP (varop, 1))
/* We can't do this if we have (ashiftrt (xor)) and the
- constant has its sign bit set in shift_mode with shift_mode
- wider than result_mode. */
+ constant has its sign bit set in shift_unit_mode with
+ shift_unit_mode wider than result_mode. */
&& !(code == ASHIFTRT && GET_CODE (varop) == XOR
- && result_mode != shift_mode
+ && int_result_mode != shift_unit_mode
&& 0 > trunc_int_for_mode (INTVAL (XEXP (varop, 1)),
- shift_mode))
+ shift_unit_mode))
&& (new_rtx = simplify_const_binary_operation
- (code, result_mode,
- gen_int_mode (INTVAL (XEXP (varop, 1)), result_mode),
+ (code, int_result_mode,
+ gen_int_mode (INTVAL (XEXP (varop, 1)), int_result_mode),
GEN_INT (count))) != 0
&& CONST_INT_P (new_rtx)
&& merge_outer_ops (&outer_op, &outer_const, GET_CODE (varop),
- INTVAL (new_rtx), result_mode, &complement_p))
+ INTVAL (new_rtx), int_result_mode,
+ &complement_p))
{
varop = XEXP (varop, 0);
continue;
@@ -10885,16 +10902,16 @@ simplify_shift_const_1 (enum rtx_code co
changes the sign bit. */
if (CONST_INT_P (XEXP (varop, 1))
&& !(code == ASHIFTRT && GET_CODE (varop) == XOR
- && result_mode != shift_mode
+ && int_result_mode != shift_unit_mode
&& 0 > trunc_int_for_mode (INTVAL (XEXP (varop, 1)),
- shift_mode)))
+ shift_unit_mode)))
{
- rtx lhs = simplify_shift_const (NULL_RTX, code, shift_mode,
+ rtx lhs = simplify_shift_const (NULL_RTX, code, shift_unit_mode,
XEXP (varop, 0), count);
- rtx rhs = simplify_shift_const (NULL_RTX, code, shift_mode,
+ rtx rhs = simplify_shift_const (NULL_RTX, code, shift_unit_mode,
XEXP (varop, 1), count);
- varop = simplify_gen_binary (GET_CODE (varop), shift_mode,
+ varop = simplify_gen_binary (GET_CODE (varop), shift_unit_mode,
lhs, rhs);
varop = apply_distributive_law (varop);
@@ -10907,6 +10924,7 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
/* Convert (lshiftrt (eq FOO 0) C) to (xor FOO 1) if STORE_FLAG_VALUE
says that the sign bit can be tested, FOO has mode MODE, C is
@@ -10914,13 +10932,13 @@ simplify_shift_const_1 (enum rtx_code co
that may be nonzero. */
if (code == LSHIFTRT
&& XEXP (varop, 1) == const0_rtx
- && GET_MODE (XEXP (varop, 0)) == result_mode
- && count == (GET_MODE_PRECISION (result_mode) - 1)
- && HWI_COMPUTABLE_MODE_P (result_mode)
+ && GET_MODE (XEXP (varop, 0)) == int_result_mode
+ && count == (GET_MODE_PRECISION (int_result_mode) - 1)
+ && HWI_COMPUTABLE_MODE_P (int_result_mode)
&& STORE_FLAG_VALUE == -1
- && nonzero_bits (XEXP (varop, 0), result_mode) == 1
- && merge_outer_ops (&outer_op, &outer_const, XOR, 1, result_mode,
- &complement_p))
+ && nonzero_bits (XEXP (varop, 0), int_result_mode) == 1
+ && merge_outer_ops (&outer_op, &outer_const, XOR, 1,
+ int_result_mode, &complement_p))
{
varop = XEXP (varop, 0);
count = 0;
@@ -10932,12 +10950,13 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
/* (lshiftrt (neg A) C) where A is either 0 or 1 and C is one less
than the number of bits in the mode is equivalent to A. */
if (code == LSHIFTRT
- && count == (GET_MODE_PRECISION (result_mode) - 1)
- && nonzero_bits (XEXP (varop, 0), result_mode) == 1)
+ && count == (GET_MODE_PRECISION (int_result_mode) - 1)
+ && nonzero_bits (XEXP (varop, 0), int_result_mode) == 1)
{
varop = XEXP (varop, 0);
count = 0;
@@ -10947,8 +10966,8 @@ simplify_shift_const_1 (enum rtx_code co
/* NEG commutes with ASHIFT since it is multiplication. Move the
NEG outside to allow shifts to combine. */
if (code == ASHIFT
- && merge_outer_ops (&outer_op, &outer_const, NEG, 0, result_mode,
- &complement_p))
+ && merge_outer_ops (&outer_op, &outer_const, NEG, 0,
+ int_result_mode, &complement_p))
{
varop = XEXP (varop, 0);
continue;
@@ -10959,16 +10978,17 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
/* (lshiftrt (plus A -1) C) where A is either 0 or 1 and C
is one less than the number of bits in the mode is
equivalent to (xor A 1). */
if (code == LSHIFTRT
- && count == (GET_MODE_PRECISION (result_mode) - 1)
+ && count == (GET_MODE_PRECISION (int_result_mode) - 1)
&& XEXP (varop, 1) == constm1_rtx
- && nonzero_bits (XEXP (varop, 0), result_mode) == 1
- && merge_outer_ops (&outer_op, &outer_const, XOR, 1, result_mode,
- &complement_p))
+ && nonzero_bits (XEXP (varop, 0), int_result_mode) == 1
+ && merge_outer_ops (&outer_op, &outer_const, XOR, 1,
+ int_result_mode, &complement_p))
{
count = 0;
varop = XEXP (varop, 0);
@@ -10983,21 +11003,20 @@ simplify_shift_const_1 (enum rtx_code co
if ((code == ASHIFTRT || code == LSHIFTRT)
&& count < HOST_BITS_PER_WIDE_INT
- && nonzero_bits (XEXP (varop, 1), result_mode) >> count == 0
- && (nonzero_bits (XEXP (varop, 1), result_mode)
- & nonzero_bits (XEXP (varop, 0), result_mode)) == 0)
+ && nonzero_bits (XEXP (varop, 1), int_result_mode) >> count == 0
+ && (nonzero_bits (XEXP (varop, 1), int_result_mode)
+ & nonzero_bits (XEXP (varop, 0), int_result_mode)) == 0)
{
varop = XEXP (varop, 0);
continue;
}
else if ((code == ASHIFTRT || code == LSHIFTRT)
&& count < HOST_BITS_PER_WIDE_INT
- && HWI_COMPUTABLE_MODE_P (result_mode)
- && 0 == (nonzero_bits (XEXP (varop, 0), result_mode)
+ && HWI_COMPUTABLE_MODE_P (int_result_mode)
+ && 0 == (nonzero_bits (XEXP (varop, 0), int_result_mode)
>> count)
- && 0 == (nonzero_bits (XEXP (varop, 0), result_mode)
- & nonzero_bits (XEXP (varop, 1),
- result_mode)))
+ && 0 == (nonzero_bits (XEXP (varop, 0), int_result_mode)
+ & nonzero_bits (XEXP (varop, 1), int_result_mode)))
{
varop = XEXP (varop, 1);
continue;
@@ -11007,12 +11026,13 @@ simplify_shift_const_1 (enum rtx_code co
if (code == ASHIFT
&& CONST_INT_P (XEXP (varop, 1))
&& (new_rtx = simplify_const_binary_operation
- (ASHIFT, result_mode,
- gen_int_mode (INTVAL (XEXP (varop, 1)), result_mode),
+ (ASHIFT, int_result_mode,
+ gen_int_mode (INTVAL (XEXP (varop, 1)), int_result_mode),
GEN_INT (count))) != 0
&& CONST_INT_P (new_rtx)
&& merge_outer_ops (&outer_op, &outer_const, PLUS,
- INTVAL (new_rtx), result_mode, &complement_p))
+ INTVAL (new_rtx), int_result_mode,
+ &complement_p))
{
varop = XEXP (varop, 0);
continue;
@@ -11025,14 +11045,15 @@ simplify_shift_const_1 (enum rtx_code co
for reasoning in doing so. */
if (code == LSHIFTRT
&& CONST_INT_P (XEXP (varop, 1))
- && mode_signbit_p (result_mode, XEXP (varop, 1))
+ && mode_signbit_p (int_result_mode, XEXP (varop, 1))
&& (new_rtx = simplify_const_binary_operation
- (code, result_mode,
- gen_int_mode (INTVAL (XEXP (varop, 1)), result_mode),
+ (code, int_result_mode,
+ gen_int_mode (INTVAL (XEXP (varop, 1)), int_result_mode),
GEN_INT (count))) != 0
&& CONST_INT_P (new_rtx)
&& merge_outer_ops (&outer_op, &outer_const, XOR,
- INTVAL (new_rtx), result_mode, &complement_p))
+ INTVAL (new_rtx), int_result_mode,
+ &complement_p))
{
varop = XEXP (varop, 0);
continue;
@@ -11044,6 +11065,7 @@ simplify_shift_const_1 (enum rtx_code co
/* The following rules apply only to scalars. */
if (shift_mode != shift_unit_mode)
break;
+ int_varop_mode = as_a <scalar_int_mode> (GET_MODE (varop));
/* If we have (xshiftrt (minus (ashiftrt X C)) X) C)
with C the size of VAROP - 1 and the shift is logical if
@@ -11054,18 +11076,18 @@ simplify_shift_const_1 (enum rtx_code co
if ((STORE_FLAG_VALUE == 1 || STORE_FLAG_VALUE == -1)
&& GET_CODE (XEXP (varop, 0)) == ASHIFTRT
- && count == (GET_MODE_PRECISION (GET_MODE (varop)) - 1)
+ && count == (GET_MODE_PRECISION (int_varop_mode) - 1)
&& (code == LSHIFTRT || code == ASHIFTRT)
&& CONST_INT_P (XEXP (XEXP (varop, 0), 1))
&& INTVAL (XEXP (XEXP (varop, 0), 1)) == count
&& rtx_equal_p (XEXP (XEXP (varop, 0), 0), XEXP (varop, 1)))
{
count = 0;
- varop = gen_rtx_GT (GET_MODE (varop), XEXP (varop, 1),
+ varop = gen_rtx_GT (int_varop_mode, XEXP (varop, 1),
const0_rtx);
if (STORE_FLAG_VALUE == 1 ? code == ASHIFTRT : code == LSHIFTRT)
- varop = gen_rtx_NEG (GET_MODE (varop), varop);
+ varop = gen_rtx_NEG (int_varop_mode, varop);
continue;
}
@@ -11101,8 +11123,15 @@ simplify_shift_const_1 (enum rtx_code co
break;
}
- shift_mode = try_widen_shift_mode (code, varop, count, result_mode, mode,
- outer_op, outer_const);
+ shift_mode = result_mode;
+ if (shift_mode != mode)
+ {
+ /* We only change the modes of scalar shifts. */
+ int_mode = as_a <scalar_int_mode> (mode);
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
+ shift_mode = try_widen_shift_mode (code, varop, count, int_result_mode,
+ int_mode, outer_op, outer_const);
+ }
/* We have now finished analyzing the shift. The result should be
a shift of type CODE with SHIFT_MODE shifting VAROP COUNT places. If
@@ -11137,8 +11166,9 @@ simplify_shift_const_1 (enum rtx_code co
/* If we were doing an LSHIFTRT in a wider mode than it was originally,
turn off all the bits that the shift would have turned off. */
if (orig_code == LSHIFTRT && result_mode != shift_mode)
- x = simplify_and_const_int (NULL_RTX, shift_mode, x,
- GET_MODE_MASK (result_mode) >> orig_count);
+ /* We only change the modes of scalar shifts. */
+ x = simplify_and_const_int (NULL_RTX, as_a <scalar_int_mode> (shift_mode),
+ x, GET_MODE_MASK (result_mode) >> orig_count);
/* Do the remainder of the processing in RESULT_MODE. */
x = gen_lowpart_or_truncate (result_mode, x);
@@ -11150,12 +11180,14 @@ simplify_shift_const_1 (enum rtx_code co
if (outer_op != UNKNOWN)
{
+ int_result_mode = as_a <scalar_int_mode> (result_mode);
+
if (GET_RTX_CLASS (outer_op) != RTX_UNARY
- && GET_MODE_PRECISION (result_mode) < HOST_BITS_PER_WIDE_INT)
- outer_const = trunc_int_for_mode (outer_const, result_mode);
+ && GET_MODE_PRECISION (int_result_mode) < HOST_BITS_PER_WIDE_INT)
+ outer_const = trunc_int_for_mode (outer_const, int_result_mode);
if (outer_op == AND)
- x = simplify_and_const_int (NULL_RTX, result_mode, x, outer_const);
+ x = simplify_and_const_int (NULL_RTX, int_result_mode, x, outer_const);
else if (outer_op == SET)
{
/* This means that we have determined that the result is
@@ -11164,9 +11196,9 @@ simplify_shift_const_1 (enum rtx_code co
x = GEN_INT (outer_const);
}
else if (GET_RTX_CLASS (outer_op) == RTX_UNARY)
- x = simplify_gen_unary (outer_op, result_mode, x, result_mode);
+ x = simplify_gen_unary (outer_op, int_result_mode, x, int_result_mode);
else
- x = simplify_gen_binary (outer_op, result_mode, x,
+ x = simplify_gen_binary (outer_op, int_result_mode, x,
GEN_INT (outer_const));
}