/* Fold a constant sub-tree into a single node for C-compiler
- Copyright (C) 1987-2019 Free Software Foundation, Inc.
+ Copyright (C) 1987-2020 Free Software Foundation, Inc.
This file is part of GCC.
case REAL_TYPE:
case FIXED_POINT_TYPE:
- case VECTOR_TYPE:
case VOID_TYPE:
return TREE_CODE (type) == TREE_CODE (orig);
+ case VECTOR_TYPE:
+ return (VECTOR_TYPE_P (orig)
+ && known_eq (TYPE_VECTOR_SUBPARTS (type),
+ TYPE_VECTOR_SUBPARTS (orig))
+ && fold_convertible_p (TREE_TYPE (type), TREE_TYPE (orig)));
+
default:
return false;
}
case TARGET_EXPR:
case COND_EXPR:
case BIND_EXPR:
+ case VIEW_CONVERT_EXPR:
break;
default:
If OEP_LEXICOGRAPHIC is set, then also handle expressions with side-effects
such as MODIFY_EXPR, RETURN_EXPR, as well as STATEMENT_LISTs.
+ If OEP_BITWISE is set, then require the values to be bitwise identical
+ rather than simply numerically equal. Do not take advantage of things
+ like math-related flags or undefined behavior; only return true for
+ values that are provably bitwise identical in all circumstances.
+
Unless OEP_MATCH_SIDE_EFFECTS is set, the function returns false on
any operand with side effect. This is unnecesarily conservative in the
case we know that arg0 and arg1 are in disjoint code paths (such as in
if (!TREE_TYPE (arg0) || !TREE_TYPE (arg1))
return false;
+ /* Bitwise identity makes no sense if the values have different layouts. */
+ if ((flags & OEP_BITWISE)
+ && !tree_nop_conversion_p (TREE_TYPE (arg0), TREE_TYPE (arg1)))
+ return false;
+
/* We cannot consider pointers to different address space equal. */
if (POINTER_TYPE_P (TREE_TYPE (arg0))
&& POINTER_TYPE_P (TREE_TYPE (arg1))
if (real_identical (&TREE_REAL_CST (arg0), &TREE_REAL_CST (arg1)))
return true;
-
- if (!HONOR_SIGNED_ZEROS (arg0))
+ if (!(flags & OEP_BITWISE) && !HONOR_SIGNED_ZEROS (arg0))
{
/* If we do not distinguish between signed and unsigned zero,
consider them equal. */
break;
}
- if (flags & OEP_ONLY_CONST)
+ /* Don't handle more cases for OEP_BITWISE, since we can't guarantee that
+ two instances of undefined behavior will give identical results. */
+ if (flags & (OEP_ONLY_CONST | OEP_BITWISE))
return false;
/* Define macros to test an operand from arg0 and arg1 for equality and a
native_encode_vector_part (const_tree expr, unsigned char *ptr, int len,
int off, unsigned HOST_WIDE_INT count)
{
- unsigned HOST_WIDE_INT i;
- int size, offset;
- tree itype, elem;
+ tree itype = TREE_TYPE (TREE_TYPE (expr));
+ if (VECTOR_BOOLEAN_TYPE_P (TREE_TYPE (expr))
+ && TYPE_PRECISION (itype) <= BITS_PER_UNIT)
+ {
+ /* This is the only case in which elements can be smaller than a byte.
+ Element 0 is always in the lsb of the containing byte. */
+ unsigned int elt_bits = TYPE_PRECISION (itype);
+ int total_bytes = CEIL (elt_bits * count, BITS_PER_UNIT);
+ if ((off == -1 && total_bytes > len) || off >= total_bytes)
+ return 0;
- offset = 0;
- itype = TREE_TYPE (TREE_TYPE (expr));
- size = GET_MODE_SIZE (SCALAR_TYPE_MODE (itype));
- for (i = 0; i < count; i++)
+ if (off == -1)
+ off = 0;
+
+ /* Zero the buffer and then set bits later where necessary. */
+ int extract_bytes = MIN (len, total_bytes - off);
+ if (ptr)
+ memset (ptr, 0, extract_bytes);
+
+ unsigned int elts_per_byte = BITS_PER_UNIT / elt_bits;
+ unsigned int first_elt = off * elts_per_byte;
+ unsigned int extract_elts = extract_bytes * elts_per_byte;
+ for (unsigned int i = 0; i < extract_elts; ++i)
+ {
+ tree elt = VECTOR_CST_ELT (expr, first_elt + i);
+ if (TREE_CODE (elt) != INTEGER_CST)
+ return 0;
+
+ if (ptr && wi::extract_uhwi (wi::to_wide (elt), 0, 1))
+ {
+ unsigned int bit = i * elt_bits;
+ ptr[bit / BITS_PER_UNIT] |= 1 << (bit % BITS_PER_UNIT);
+ }
+ }
+ return extract_bytes;
+ }
+
+ int offset = 0;
+ int size = GET_MODE_SIZE (SCALAR_TYPE_MODE (itype));
+ for (unsigned HOST_WIDE_INT i = 0; i < count; i++)
{
if (off >= size)
{
off -= size;
continue;
}
- elem = VECTOR_CST_ELT (expr, i);
+ tree elem = VECTOR_CST_ELT (expr, i);
int res = native_encode_expr (elem, ptr ? ptr + offset : NULL,
len - offset, off);
if ((off == -1 && res != size) || res == 0)
return 0;
if (off == -1)
off = 0;
+ len = MIN (total_bytes - off, len);
if (ptr == NULL)
/* Dry run. */;
- else if (TREE_STRING_LENGTH (expr) - off < MIN (total_bytes, len))
+ else
{
int written = 0;
if (off < TREE_STRING_LENGTH (expr))
written = MIN (len, TREE_STRING_LENGTH (expr) - off);
memcpy (ptr, TREE_STRING_POINTER (expr) + off, written);
}
- memset (ptr + written, 0,
- MIN (total_bytes - written, len - written));
+ memset (ptr + written, 0, len - written);
}
- else
- memcpy (ptr, TREE_STRING_POINTER (expr) + off, MIN (total_bytes, len));
- return MIN (total_bytes - off, len);
+ return len;
}
}
}
+/* Similar to native_encode_expr, but also handle CONSTRUCTORs, VCEs,
+ NON_LVALUE_EXPRs and nops. */
+
+int
+native_encode_initializer (tree init, unsigned char *ptr, int len,
+ int off)
+{
+ /* We don't support starting at negative offset and -1 is special. */
+ if (off < -1 || init == NULL_TREE)
+ return 0;
+
+ STRIP_NOPS (init);
+ switch (TREE_CODE (init))
+ {
+ case VIEW_CONVERT_EXPR:
+ case NON_LVALUE_EXPR:
+ return native_encode_initializer (TREE_OPERAND (init, 0), ptr, len, off);
+ default:
+ return native_encode_expr (init, ptr, len, off);
+ case CONSTRUCTOR:
+ tree type = TREE_TYPE (init);
+ HOST_WIDE_INT total_bytes = int_size_in_bytes (type);
+ if (total_bytes < 0)
+ return 0;
+ if ((off == -1 && total_bytes > len) || off >= total_bytes)
+ return 0;
+ int o = off == -1 ? 0 : off;
+ if (TREE_CODE (type) == ARRAY_TYPE)
+ {
+ HOST_WIDE_INT min_index;
+ unsigned HOST_WIDE_INT cnt;
+ HOST_WIDE_INT curpos = 0, fieldsize;
+ constructor_elt *ce;
+
+ if (TYPE_DOMAIN (type) == NULL_TREE
+ || !tree_fits_shwi_p (TYPE_MIN_VALUE (TYPE_DOMAIN (type))))
+ return 0;
+
+ fieldsize = int_size_in_bytes (TREE_TYPE (type));
+ if (fieldsize <= 0)
+ return 0;
+
+ min_index = tree_to_shwi (TYPE_MIN_VALUE (TYPE_DOMAIN (type)));
+ if (ptr != NULL)
+ memset (ptr, '\0', MIN (total_bytes - off, len));
+
+ FOR_EACH_VEC_SAFE_ELT (CONSTRUCTOR_ELTS (init), cnt, ce)
+ {
+ tree val = ce->value;
+ tree index = ce->index;
+ HOST_WIDE_INT pos = curpos, count = 0;
+ bool full = false;
+ if (index && TREE_CODE (index) == RANGE_EXPR)
+ {
+ if (!tree_fits_shwi_p (TREE_OPERAND (index, 0))
+ || !tree_fits_shwi_p (TREE_OPERAND (index, 1)))
+ return 0;
+ pos = (tree_to_shwi (TREE_OPERAND (index, 0)) - min_index)
+ * fieldsize;
+ count = (tree_to_shwi (TREE_OPERAND (index, 1))
+ - tree_to_shwi (TREE_OPERAND (index, 0)));
+ }
+ else if (index)
+ {
+ if (!tree_fits_shwi_p (index))
+ return 0;
+ pos = (tree_to_shwi (index) - min_index) * fieldsize;
+ }
+
+ curpos = pos;
+ if (val)
+ do
+ {
+ if (off == -1
+ || (curpos >= off
+ && (curpos + fieldsize
+ <= (HOST_WIDE_INT) off + len)))
+ {
+ if (full)
+ {
+ if (ptr)
+ memcpy (ptr + (curpos - o), ptr + (pos - o),
+ fieldsize);
+ }
+ else if (!native_encode_initializer (val,
+ ptr
+ ? ptr + curpos - o
+ : NULL,
+ fieldsize,
+ off == -1 ? -1
+ : 0))
+ return 0;
+ else
+ {
+ full = true;
+ pos = curpos;
+ }
+ }
+ else if (curpos + fieldsize > off
+ && curpos < (HOST_WIDE_INT) off + len)
+ {
+ /* Partial overlap. */
+ unsigned char *p = NULL;
+ int no = 0;
+ int l;
+ if (curpos >= off)
+ {
+ if (ptr)
+ p = ptr + curpos - off;
+ l = MIN ((HOST_WIDE_INT) off + len - curpos,
+ fieldsize);
+ }
+ else
+ {
+ p = ptr;
+ no = off - curpos;
+ l = len;
+ }
+ if (!native_encode_initializer (val, p, l, no))
+ return 0;
+ }
+ curpos += fieldsize;
+ }
+ while (count-- != 0);
+ }
+ return MIN (total_bytes - off, len);
+ }
+ else if (TREE_CODE (type) == RECORD_TYPE
+ || TREE_CODE (type) == UNION_TYPE)
+ {
+ unsigned HOST_WIDE_INT cnt;
+ constructor_elt *ce;
+
+ if (ptr != NULL)
+ memset (ptr, '\0', MIN (total_bytes - off, len));
+ FOR_EACH_VEC_SAFE_ELT (CONSTRUCTOR_ELTS (init), cnt, ce)
+ {
+ tree field = ce->index;
+ tree val = ce->value;
+ HOST_WIDE_INT pos, fieldsize;
+
+ if (field == NULL_TREE)
+ return 0;
+
+ pos = int_byte_position (field);
+ if (off != -1 && (HOST_WIDE_INT) off + len <= pos)
+ continue;
+
+ if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE
+ && TYPE_DOMAIN (TREE_TYPE (field))
+ && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (field))))
+ return 0;
+ if (DECL_SIZE_UNIT (field) == NULL_TREE
+ || !tree_fits_shwi_p (DECL_SIZE_UNIT (field)))
+ return 0;
+ fieldsize = tree_to_shwi (DECL_SIZE_UNIT (field));
+ if (fieldsize == 0)
+ continue;
+
+ if (off != -1 && pos + fieldsize <= off)
+ continue;
+
+ if (DECL_BIT_FIELD (field))
+ return 0;
+
+ if (val == NULL_TREE)
+ continue;
+
+ if (off == -1
+ || (pos >= off
+ && (pos + fieldsize <= (HOST_WIDE_INT) off + len)))
+ {
+ if (!native_encode_initializer (val, ptr ? ptr + pos - o
+ : NULL,
+ fieldsize,
+ off == -1 ? -1 : 0))
+ return 0;
+ }
+ else
+ {
+ /* Partial overlap. */
+ unsigned char *p = NULL;
+ int no = 0;
+ int l;
+ if (pos >= off)
+ {
+ if (ptr)
+ p = ptr + pos - off;
+ l = MIN ((HOST_WIDE_INT) off + len - pos,
+ fieldsize);
+ }
+ else
+ {
+ p = ptr;
+ no = off - pos;
+ l = len;
+ }
+ if (!native_encode_initializer (val, p, l, no))
+ return 0;
+ }
+ }
+ return MIN (total_bytes - off, len);
+ }
+ return 0;
+ }
+}
+
/* Subroutine of native_interpret_expr. Interpret the contents of
the buffer PTR of length LEN as an INTEGER_CST of type TYPE.
return build_complex (type, rpart, ipart);
}
+/* Read a vector of type TYPE from the target memory image given by BYTES,
+ which contains LEN bytes. The vector is known to be encodable using
+ NPATTERNS interleaved patterns with NELTS_PER_PATTERN elements each.
+
+ Return the vector on success, otherwise return null. */
+
+static tree
+native_interpret_vector_part (tree type, const unsigned char *bytes,
+ unsigned int len, unsigned int npatterns,
+ unsigned int nelts_per_pattern)
+{
+ tree elt_type = TREE_TYPE (type);
+ if (VECTOR_BOOLEAN_TYPE_P (type)
+ && TYPE_PRECISION (elt_type) <= BITS_PER_UNIT)
+ {
+ /* This is the only case in which elements can be smaller than a byte.
+ Element 0 is always in the lsb of the containing byte. */
+ unsigned int elt_bits = TYPE_PRECISION (elt_type);
+ if (elt_bits * npatterns * nelts_per_pattern > len * BITS_PER_UNIT)
+ return NULL_TREE;
+
+ tree_vector_builder builder (type, npatterns, nelts_per_pattern);
+ for (unsigned int i = 0; i < builder.encoded_nelts (); ++i)
+ {
+ unsigned int bit_index = i * elt_bits;
+ unsigned int byte_index = bit_index / BITS_PER_UNIT;
+ unsigned int lsb = bit_index % BITS_PER_UNIT;
+ builder.quick_push (bytes[byte_index] & (1 << lsb)
+ ? build_all_ones_cst (elt_type)
+ : build_zero_cst (elt_type));
+ }
+ return builder.build ();
+ }
+
+ unsigned int elt_bytes = tree_to_uhwi (TYPE_SIZE_UNIT (elt_type));
+ if (elt_bytes * npatterns * nelts_per_pattern > len)
+ return NULL_TREE;
+
+ tree_vector_builder builder (type, npatterns, nelts_per_pattern);
+ for (unsigned int i = 0; i < builder.encoded_nelts (); ++i)
+ {
+ tree elt = native_interpret_expr (elt_type, bytes, elt_bytes);
+ if (!elt)
+ return NULL_TREE;
+ builder.quick_push (elt);
+ bytes += elt_bytes;
+ }
+ return builder.build ();
+}
/* Subroutine of native_interpret_expr. Interpret the contents of
the buffer PTR of length LEN as a VECTOR_CST of type TYPE.
static tree
native_interpret_vector (tree type, const unsigned char *ptr, unsigned int len)
{
- tree etype, elem;
- unsigned int i, size;
+ tree etype;
+ unsigned int size;
unsigned HOST_WIDE_INT count;
etype = TREE_TYPE (type);
|| size * count > len)
return NULL_TREE;
- tree_vector_builder elements (type, count, 1);
- for (i = 0; i < count; ++i)
- {
- elem = native_interpret_expr (etype, ptr+(i*size), size);
- if (!elem)
- return NULL_TREE;
- elements.quick_push (elem);
- }
- return elements.build ();
+ return native_interpret_vector_part (type, ptr, len, count, 1);
}
/* Returns true if we can interpret the contents of a native encoding
as TYPE. */
-static bool
+bool
can_native_interpret_type_p (tree type)
{
switch (TREE_CODE (type))
}
}
-/* Read a vector of type TYPE from the target memory image given by BYTES,
- starting at byte FIRST_BYTE. The vector is known to be encodable using
- NPATTERNS interleaved patterns with NELTS_PER_PATTERN elements each,
- and BYTES is known to have enough bytes to supply NPATTERNS *
- NELTS_PER_PATTERN vector elements. Each element of BYTES contains
- BITS_PER_UNIT bits and the bytes are in target memory order.
+/* Routines for manipulation of native_encode_expr encoded data if the encoded
+ or extracted constant positions and/or sizes aren't byte aligned. */
- Return the vector on success, otherwise return null. */
+/* Shift left the bytes in PTR of SZ elements by AMNT bits, carrying over the
+ bits between adjacent elements. AMNT should be within
+ [0, BITS_PER_UNIT).
+ Example, AMNT = 2:
+ 00011111|11100000 << 2 = 01111111|10000000
+ PTR[1] | PTR[0] PTR[1] | PTR[0]. */
-static tree
-native_decode_vector_tree (tree type, vec<unsigned char> bytes,
- unsigned int first_byte, unsigned int npatterns,
- unsigned int nelts_per_pattern)
+void
+shift_bytes_in_array_left (unsigned char *ptr, unsigned int sz,
+ unsigned int amnt)
{
- tree_vector_builder builder (type, npatterns, nelts_per_pattern);
- tree elt_type = TREE_TYPE (type);
- unsigned int elt_bits = tree_to_uhwi (TYPE_SIZE (elt_type));
- if (VECTOR_BOOLEAN_TYPE_P (type) && elt_bits <= BITS_PER_UNIT)
+ if (amnt == 0)
+ return;
+
+ unsigned char carry_over = 0U;
+ unsigned char carry_mask = (~0U) << (unsigned char) (BITS_PER_UNIT - amnt);
+ unsigned char clear_mask = (~0U) << amnt;
+
+ for (unsigned int i = 0; i < sz; i++)
{
- /* This is the only case in which elements can be smaller than a byte.
- Element 0 is always in the lsb of the containing byte. */
- elt_bits = TYPE_PRECISION (elt_type);
- for (unsigned int i = 0; i < builder.encoded_nelts (); ++i)
+ unsigned prev_carry_over = carry_over;
+ carry_over = (ptr[i] & carry_mask) >> (BITS_PER_UNIT - amnt);
+
+ ptr[i] <<= amnt;
+ if (i != 0)
{
- unsigned int bit_index = first_byte * BITS_PER_UNIT + i * elt_bits;
- unsigned int byte_index = bit_index / BITS_PER_UNIT;
- unsigned int lsb = bit_index % BITS_PER_UNIT;
- builder.quick_push (bytes[byte_index] & (1 << lsb)
- ? build_all_ones_cst (elt_type)
- : build_zero_cst (elt_type));
+ ptr[i] &= clear_mask;
+ ptr[i] |= prev_carry_over;
}
}
- else
+}
+
+/* Like shift_bytes_in_array_left but for big-endian.
+ Shift right the bytes in PTR of SZ elements by AMNT bits, carrying over the
+ bits between adjacent elements. AMNT should be within
+ [0, BITS_PER_UNIT).
+ Example, AMNT = 2:
+ 00011111|11100000 >> 2 = 00000111|11111000
+ PTR[0] | PTR[1] PTR[0] | PTR[1]. */
+
+void
+shift_bytes_in_array_right (unsigned char *ptr, unsigned int sz,
+ unsigned int amnt)
+{
+ if (amnt == 0)
+ return;
+
+ unsigned char carry_over = 0U;
+ unsigned char carry_mask = ~(~0U << amnt);
+
+ for (unsigned int i = 0; i < sz; i++)
{
- unsigned int elt_bytes = elt_bits / BITS_PER_UNIT;
- for (unsigned int i = 0; i < builder.encoded_nelts (); ++i)
- {
- tree elt = native_interpret_expr (elt_type, &bytes[first_byte],
- elt_bytes);
- if (!elt)
- return NULL_TREE;
- builder.quick_push (elt);
- first_byte += elt_bytes;
- }
+ unsigned prev_carry_over = carry_over;
+ carry_over = ptr[i] & carry_mask;
+
+ carry_over <<= (unsigned char) BITS_PER_UNIT - amnt;
+ ptr[i] >>= amnt;
+ ptr[i] |= prev_carry_over;
}
- return builder.build ();
}
/* Try to view-convert VECTOR_CST EXPR to VECTOR_TYPE TYPE by operating
/* Reencode the bytes as TYPE. */
unsigned int type_npatterns = type_sequence_bits / type_elt_bits;
- return native_decode_vector_tree (type, buffer, 0, type_npatterns,
- nelts_per_pattern);
+ return native_interpret_vector_part (type, &buffer[0], buffer.length (),
+ type_npatterns, nelts_per_pattern);
}
/* Fold a VIEW_CONVERT_EXPR of a constant expression EXPR to type
}
else if (TREE_CODE (t) == MEM_REF
&& integer_zerop (TREE_OPERAND (t, 1)))
- return TREE_OPERAND (t, 0);
+ {
+ t = TREE_OPERAND (t, 0);
+
+ if (TREE_TYPE (t) != ptrtype)
+ t = fold_convert_loc (loc, ptrtype, t);
+ }
else if (TREE_CODE (t) == MEM_REF
&& TREE_CODE (TREE_OPERAND (t, 0)) == INTEGER_CST)
return fold_binary (POINTER_PLUS_EXPR, ptrtype,
if (!base)
return NULL_TREE;
return fold_build2 (MEM_REF, type,
- build_fold_addr_expr (base),
+ build1 (ADDR_EXPR, TREE_TYPE (arg0), base),
int_const_binop (PLUS_EXPR, arg1,
size_int (coffset)));
}
/* Convert -A / -B to A / B when the type is signed and overflow is
undefined. */
- if ((!INTEGRAL_TYPE_P (type) || TYPE_OVERFLOW_UNDEFINED (type))
+ if ((!ANY_INTEGRAL_TYPE_P (type) || TYPE_OVERFLOW_UNDEFINED (type))
&& TREE_CODE (op0) == NEGATE_EXPR
&& negate_expr_p (op1))
{
- if (INTEGRAL_TYPE_P (type))
+ if (ANY_INTEGRAL_TYPE_P (type))
fold_overflow_warning (("assuming signed overflow does not occur "
"when distributing negation across "
"division"),
TREE_OPERAND (arg0, 0)),
negate_expr (op1));
}
- if ((!INTEGRAL_TYPE_P (type) || TYPE_OVERFLOW_UNDEFINED (type))
+ if ((!ANY_INTEGRAL_TYPE_P (type) || TYPE_OVERFLOW_UNDEFINED (type))
&& TREE_CODE (arg1) == NEGATE_EXPR
&& negate_expr_p (op0))
{
- if (INTEGRAL_TYPE_P (type))
+ if (ANY_INTEGRAL_TYPE_P (type))
fold_overflow_warning (("assuming signed overflow does not occur "
"when distributing negation across "
"division"),
return omit_one_operand_loc (loc, type, res, arg0);
}
- /* Fold (X & C) op (Y & C) as (X ^ Y) & C op 0", and symmetries. */
- if (TREE_CODE (arg0) == BIT_AND_EXPR
- && TREE_CODE (arg1) == BIT_AND_EXPR)
- {
- tree arg00 = TREE_OPERAND (arg0, 0);
- tree arg01 = TREE_OPERAND (arg0, 1);
- tree arg10 = TREE_OPERAND (arg1, 0);
- tree arg11 = TREE_OPERAND (arg1, 1);
- tree itype = TREE_TYPE (arg0);
-
- if (operand_equal_p (arg01, arg11, 0))
- {
- tem = fold_convert_loc (loc, itype, arg10);
- tem = fold_build2_loc (loc, BIT_XOR_EXPR, itype, arg00, tem);
- tem = fold_build2_loc (loc, BIT_AND_EXPR, itype, tem, arg01);
- return fold_build2_loc (loc, code, type, tem,
- build_zero_cst (itype));
- }
- if (operand_equal_p (arg01, arg10, 0))
- {
- tem = fold_convert_loc (loc, itype, arg11);
- tem = fold_build2_loc (loc, BIT_XOR_EXPR, itype, arg00, tem);
- tem = fold_build2_loc (loc, BIT_AND_EXPR, itype, tem, arg01);
- return fold_build2_loc (loc, code, type, tem,
- build_zero_cst (itype));
- }
- if (operand_equal_p (arg00, arg11, 0))
- {
- tem = fold_convert_loc (loc, itype, arg10);
- tem = fold_build2_loc (loc, BIT_XOR_EXPR, itype, arg01, tem);
- tem = fold_build2_loc (loc, BIT_AND_EXPR, itype, tem, arg00);
- return fold_build2_loc (loc, code, type, tem,
- build_zero_cst (itype));
- }
- if (operand_equal_p (arg00, arg10, 0))
- {
- tem = fold_convert_loc (loc, itype, arg11);
- tem = fold_build2_loc (loc, BIT_XOR_EXPR, itype, arg01, tem);
- tem = fold_build2_loc (loc, BIT_AND_EXPR, itype, tem, arg00);
- return fold_build2_loc (loc, code, type, tem,
- build_zero_cst (itype));
- }
- }
-
if (TREE_CODE (arg0) == BIT_XOR_EXPR
&& TREE_CODE (arg1) == BIT_XOR_EXPR)
{
CASE_CFN_POPCOUNT:
CASE_CFN_CLZ:
CASE_CFN_CLRSB:
+ case CFN_BUILT_IN_BSWAP16:
case CFN_BUILT_IN_BSWAP32:
case CFN_BUILT_IN_BSWAP64:
+ case CFN_BUILT_IN_BSWAP128:
/* Always true. */
return true;
projects / thirdparty / gcc.git / blobdiff