/* We record floating-point CONST_DOUBLEs in each floating-point mode for
the values of 0, 1, and 2. For the integer entries and VOIDmode, we
- record a copy of const[012]_rtx. */
+ record a copy of const[012]_rtx and constm1_rtx. CONSTM1_RTX
+ is set only for MODE_INT and MODE_VECTOR_INT modes. */
-rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
+rtx const_tiny_rtx[4][(int) MAX_MACHINE_MODE];
rtx const_true_rtx;
static rtx lookup_const_fixed (rtx);
static hashval_t mem_attrs_htab_hash (const void *);
static int mem_attrs_htab_eq (const void *, const void *);
-static mem_attrs *get_mem_attrs (alias_set_type, tree, rtx, rtx, unsigned int,
- addr_space_t, enum machine_mode);
static hashval_t reg_attrs_htab_hash (const void *);
static int reg_attrs_htab_eq (const void *, const void *);
static reg_attrs *get_reg_attrs (tree, int);
return (p->alias ^ (p->align * 1000)
^ (p->addrspace * 4000)
- ^ ((p->offset ? INTVAL (p->offset) : 0) * 50000)
- ^ ((p->size ? INTVAL (p->size) : 0) * 2500000)
+ ^ ((p->offset_known_p ? p->offset : 0) * 50000)
+ ^ ((p->size_known_p ? p->size : 0) * 2500000)
^ (size_t) iterative_hash_expr (p->expr, 0));
}
+/* Return true if the given memory attributes are equal. */
+
+static bool
+mem_attrs_eq_p (const struct mem_attrs *p, const struct mem_attrs *q)
+{
+ return (p->alias == q->alias
+ && p->offset_known_p == q->offset_known_p
+ && (!p->offset_known_p || p->offset == q->offset)
+ && p->size_known_p == q->size_known_p
+ && (!p->size_known_p || p->size == q->size)
+ && p->align == q->align
+ && p->addrspace == q->addrspace
+ && (p->expr == q->expr
+ || (p->expr != NULL_TREE && q->expr != NULL_TREE
+ && operand_equal_p (p->expr, q->expr, 0))));
+}
+
/* Returns nonzero if the value represented by X (which is really a
mem_attrs *) is the same as that given by Y (which is also really a
mem_attrs *). */
static int
mem_attrs_htab_eq (const void *x, const void *y)
{
- const mem_attrs *const p = (const mem_attrs *) x;
- const mem_attrs *const q = (const mem_attrs *) y;
-
- return (p->alias == q->alias && p->offset == q->offset
- && p->size == q->size && p->align == q->align
- && p->addrspace == q->addrspace
- && (p->expr == q->expr
- || (p->expr != NULL_TREE && q->expr != NULL_TREE
- && operand_equal_p (p->expr, q->expr, 0))));
+ return mem_attrs_eq_p ((const mem_attrs *) x, (const mem_attrs *) y);
}
-/* Allocate a new mem_attrs structure and insert it into the hash table if
- one identical to it is not already in the table. We are doing this for
- MEM of mode MODE. */
+/* Set MEM's memory attributes so that they are the same as ATTRS. */
-static mem_attrs *
-get_mem_attrs (alias_set_type alias, tree expr, rtx offset, rtx size,
- unsigned int align, addr_space_t addrspace, enum machine_mode mode)
+static void
+set_mem_attrs (rtx mem, mem_attrs *attrs)
{
- mem_attrs attrs;
void **slot;
- /* If everything is the default, we can just return zero.
- This must match what the corresponding MEM_* macros return when the
- field is not present. */
- if (alias == 0 && expr == 0 && offset == 0 && addrspace == 0
- && (size == 0
- || (mode != BLKmode && GET_MODE_SIZE (mode) == INTVAL (size)))
- && (STRICT_ALIGNMENT && mode != BLKmode
- ? align == GET_MODE_ALIGNMENT (mode) : align == BITS_PER_UNIT))
- return 0;
-
- attrs.alias = alias;
- attrs.expr = expr;
- attrs.offset = offset;
- attrs.size = size;
- attrs.align = align;
- attrs.addrspace = addrspace;
+ /* If everything is the default, we can just clear the attributes. */
+ if (mem_attrs_eq_p (attrs, mode_mem_attrs[(int) GET_MODE (mem)]))
+ {
+ MEM_ATTRS (mem) = 0;
+ return;
+ }
- slot = htab_find_slot (mem_attrs_htab, &attrs, INSERT);
+ slot = htab_find_slot (mem_attrs_htab, attrs, INSERT);
if (*slot == 0)
{
*slot = ggc_alloc_mem_attrs ();
- memcpy (*slot, &attrs, sizeof (mem_attrs));
+ memcpy (*slot, attrs, sizeof (mem_attrs));
}
- return (mem_attrs *) *slot;
+ MEM_ATTRS (mem) = (mem_attrs *) *slot;
}
/* Returns a hash code for X (which is a really a reg_attrs *). */
offset = byte_lowpart_offset (GET_MODE (reg), GET_MODE (x));
if (MEM_P (x))
{
- if (MEM_OFFSET (x) && CONST_INT_P (MEM_OFFSET (x)))
- REG_ATTRS (reg)
- = get_reg_attrs (MEM_EXPR (x), INTVAL (MEM_OFFSET (x)) + offset);
+ if (MEM_OFFSET_KNOWN_P (x))
+ REG_ATTRS (reg) = get_reg_attrs (MEM_EXPR (x),
+ MEM_OFFSET (x) + offset);
if (MEM_POINTER (x))
mark_reg_pointer (reg, 0);
}
unsigned HOST_WIDE_INT offset;
/* This function can't use
- if (!MEM_EXPR (mem) || !MEM_OFFSET (mem)
- || !CONST_INT_P (MEM_OFFSET (mem))
+ if (!MEM_EXPR (mem) || !MEM_OFFSET_KNOWN_P (mem)
|| (MAX (MEM_ALIGN (mem),
- get_object_alignment (MEM_EXPR (mem), align))
+ MAX (align, get_object_alignment (MEM_EXPR (mem))))
< align))
return -1;
else
- return (- INTVAL (MEM_OFFSET (mem))) & (align / BITS_PER_UNIT - 1);
+ return (- MEM_OFFSET (mem)) & (align / BITS_PER_UNIT - 1);
for two reasons:
- COMPONENT_REFs in MEM_EXPR can have NULL first operand,
for <variable>. get_inner_reference doesn't handle it and
isn't sufficiently aligned, the object it is in might be. */
gcc_assert (MEM_P (mem));
expr = MEM_EXPR (mem);
- if (expr == NULL_TREE
- || MEM_OFFSET (mem) == NULL_RTX
- || !CONST_INT_P (MEM_OFFSET (mem)))
+ if (expr == NULL_TREE || !MEM_OFFSET_KNOWN_P (mem))
return -1;
- offset = INTVAL (MEM_OFFSET (mem));
+ offset = MEM_OFFSET (mem);
if (DECL_P (expr))
{
if (DECL_ALIGN (expr) < align)
set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
HOST_WIDE_INT bitpos)
{
- alias_set_type alias;
- tree expr = NULL;
- rtx offset = NULL_RTX;
- rtx size = NULL_RTX;
- unsigned int align = BITS_PER_UNIT;
HOST_WIDE_INT apply_bitpos = 0;
tree type;
+ struct mem_attrs attrs, *defattrs, *refattrs;
/* It can happen that type_for_mode was given a mode for which there
is no language-level type. In which case it returns NULL, which
set_mem_attributes. */
gcc_assert (!DECL_P (t) || ref != DECL_RTL_IF_SET (t));
+ memset (&attrs, 0, sizeof (attrs));
+
/* Get the alias set from the expression or type (perhaps using a
front-end routine) and use it. */
- alias = get_alias_set (t);
+ attrs.alias = get_alias_set (t);
MEM_VOLATILE_P (ref) |= TYPE_VOLATILE (type);
MEM_IN_STRUCT_P (ref)
MEM_SCALAR_P (ref) = 1;
/* Default values from pre-existing memory attributes if present. */
- if (MEM_ATTRS (ref))
+ refattrs = MEM_ATTRS (ref);
+ if (refattrs)
{
/* ??? Can this ever happen? Calling this routine on a MEM that
already carries memory attributes should probably be invalid. */
- expr = MEM_EXPR (ref);
- offset = MEM_OFFSET (ref);
- size = MEM_SIZE (ref);
- align = MEM_ALIGN (ref);
+ attrs.expr = refattrs->expr;
+ attrs.offset_known_p = refattrs->offset_known_p;
+ attrs.offset = refattrs->offset;
+ attrs.size_known_p = refattrs->size_known_p;
+ attrs.size = refattrs->size;
+ attrs.align = refattrs->align;
}
/* Otherwise, default values from the mode of the MEM reference. */
- else if (GET_MODE (ref) != BLKmode)
+ else
{
+ defattrs = mode_mem_attrs[(int) GET_MODE (ref)];
+ gcc_assert (!defattrs->expr);
+ gcc_assert (!defattrs->offset_known_p);
+
/* Respect mode size. */
- size = GEN_INT (GET_MODE_SIZE (GET_MODE (ref)));
+ attrs.size_known_p = defattrs->size_known_p;
+ attrs.size = defattrs->size;
/* ??? Is this really necessary? We probably should always get
the size from the type below. */
/* Respect mode alignment for STRICT_ALIGNMENT targets if T is a type;
if T is an object, always compute the object alignment below. */
- if (STRICT_ALIGNMENT && TYPE_P (t))
- align = GET_MODE_ALIGNMENT (GET_MODE (ref));
+ if (TYPE_P (t))
+ attrs.align = defattrs->align;
+ else
+ attrs.align = BITS_PER_UNIT;
/* ??? If T is a type, respecting mode alignment may *also* be wrong
e.g. if the type carries an alignment attribute. Should we be
able to simply always use TYPE_ALIGN? */
/* We can set the alignment from the type if we are making an object,
this is an INDIRECT_REF, or if TYPE_ALIGN_OK. */
if (objectp || TREE_CODE (t) == INDIRECT_REF || TYPE_ALIGN_OK (type))
- align = MAX (align, TYPE_ALIGN (type));
+ attrs.align = MAX (attrs.align, TYPE_ALIGN (type));
else if (TREE_CODE (t) == MEM_REF)
{
|| CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))))
{
if (DECL_P (TREE_OPERAND (op0, 0)))
- align = DECL_ALIGN (TREE_OPERAND (op0, 0));
+ attrs.align = DECL_ALIGN (TREE_OPERAND (op0, 0));
else if (CONSTANT_CLASS_P (TREE_OPERAND (op0, 0)))
{
- align = TYPE_ALIGN (TREE_TYPE (TREE_OPERAND (op0, 0)));
+ attrs.align = TYPE_ALIGN (TREE_TYPE (TREE_OPERAND (op0, 0)));
#ifdef CONSTANT_ALIGNMENT
- align = CONSTANT_ALIGNMENT (TREE_OPERAND (op0, 0), align);
+ attrs.align = CONSTANT_ALIGNMENT (TREE_OPERAND (op0, 0),
+ attrs.align);
#endif
}
if (TREE_INT_CST_LOW (TREE_OPERAND (t, 1)) != 0)
unsigned HOST_WIDE_INT ioff
= TREE_INT_CST_LOW (TREE_OPERAND (t, 1));
unsigned HOST_WIDE_INT aoff = (ioff & -ioff) * BITS_PER_UNIT;
- align = MIN (aoff, align);
+ attrs.align = MIN (aoff, attrs.align);
}
}
else
/* ??? This isn't fully correct, we can't set the alignment from the
type in all cases. */
- align = MAX (align, TYPE_ALIGN (type));
+ attrs.align = MAX (attrs.align, TYPE_ALIGN (type));
}
else if (TREE_CODE (t) == TARGET_MEM_REF)
/* ??? This isn't fully correct, we can't set the alignment from the
type in all cases. */
- align = MAX (align, TYPE_ALIGN (type));
+ attrs.align = MAX (attrs.align, TYPE_ALIGN (type));
/* If the size is known, we can set that. */
if (TYPE_SIZE_UNIT (type) && host_integerp (TYPE_SIZE_UNIT (type), 1))
- size = GEN_INT (tree_low_cst (TYPE_SIZE_UNIT (type), 1));
+ {
+ attrs.size_known_p = true;
+ attrs.size = tree_low_cst (TYPE_SIZE_UNIT (type), 1);
+ }
/* If T is not a type, we may be able to deduce some more information about
the expression. */
&& !TREE_THIS_VOLATILE (base))
MEM_READONLY_P (ref) = 1;
+ /* Mark static const strings readonly as well. */
+ if (base && TREE_CODE (base) == STRING_CST
+ && TREE_READONLY (base)
+ && TREE_STATIC (base))
+ MEM_READONLY_P (ref) = 1;
+
/* If this expression uses it's parent's alias set, mark it such
that we won't change it. */
if (component_uses_parent_alias_set (t))
/* If this is a decl, set the attributes of the MEM from it. */
if (DECL_P (t))
{
- expr = t;
- offset = const0_rtx;
+ attrs.expr = t;
+ attrs.offset_known_p = true;
+ attrs.offset = 0;
apply_bitpos = bitpos;
- size = (DECL_SIZE_UNIT (t)
- && host_integerp (DECL_SIZE_UNIT (t), 1)
- ? GEN_INT (tree_low_cst (DECL_SIZE_UNIT (t), 1)) : 0);
- align = DECL_ALIGN (t);
+ if (DECL_SIZE_UNIT (t) && host_integerp (DECL_SIZE_UNIT (t), 1))
+ {
+ attrs.size_known_p = true;
+ attrs.size = tree_low_cst (DECL_SIZE_UNIT (t), 1);
+ }
+ else
+ attrs.size_known_p = false;
+ attrs.align = DECL_ALIGN (t);
align_computed = true;
}
/* If this is a constant, we know the alignment. */
else if (CONSTANT_CLASS_P (t))
{
- align = TYPE_ALIGN (type);
+ attrs.align = TYPE_ALIGN (type);
#ifdef CONSTANT_ALIGNMENT
- align = CONSTANT_ALIGNMENT (t, align);
+ attrs.align = CONSTANT_ALIGNMENT (t, attrs.align);
#endif
align_computed = true;
}
else if (TREE_CODE (t) == COMPONENT_REF
&& ! DECL_BIT_FIELD (TREE_OPERAND (t, 1)))
{
- expr = t;
- offset = const0_rtx;
+ attrs.expr = t;
+ attrs.offset_known_p = true;
+ attrs.offset = 0;
apply_bitpos = bitpos;
/* ??? Any reason the field size would be different than
the size we got from the type? */
if (DECL_P (t2))
{
- expr = t2;
- offset = NULL;
+ attrs.expr = t2;
+ attrs.offset_known_p = false;
if (host_integerp (off_tree, 1))
{
HOST_WIDE_INT ioff = tree_low_cst (off_tree, 1);
HOST_WIDE_INT aoff = (ioff & -ioff) * BITS_PER_UNIT;
- align = DECL_ALIGN (t2);
- if (aoff && (unsigned HOST_WIDE_INT) aoff < align)
- align = aoff;
+ attrs.align = DECL_ALIGN (t2);
+ if (aoff && (unsigned HOST_WIDE_INT) aoff < attrs.align)
+ attrs.align = aoff;
align_computed = true;
- offset = GEN_INT (ioff);
+ attrs.offset_known_p = true;
+ attrs.offset = ioff;
apply_bitpos = bitpos;
}
}
else if (TREE_CODE (t2) == COMPONENT_REF)
{
- expr = t2;
- offset = NULL;
+ attrs.expr = t2;
+ attrs.offset_known_p = false;
if (host_integerp (off_tree, 1))
{
- offset = GEN_INT (tree_low_cst (off_tree, 1));
+ attrs.offset_known_p = true;
+ attrs.offset = tree_low_cst (off_tree, 1);
apply_bitpos = bitpos;
}
/* ??? Any reason the field size would be different than
/* If this is an indirect reference, record it. */
else if (TREE_CODE (t) == MEM_REF)
{
- expr = t;
- offset = const0_rtx;
+ attrs.expr = t;
+ attrs.offset_known_p = true;
+ attrs.offset = 0;
apply_bitpos = bitpos;
}
}
else if (TREE_CODE (t) == MEM_REF
|| TREE_CODE (t) == TARGET_MEM_REF)
{
- expr = t;
- offset = const0_rtx;
+ attrs.expr = t;
+ attrs.offset_known_p = true;
+ attrs.offset = 0;
apply_bitpos = bitpos;
}
- if (!align_computed && !INDIRECT_REF_P (t))
+ if (!align_computed)
{
- unsigned int obj_align = get_object_alignment (t, BIGGEST_ALIGNMENT);
- align = MAX (align, obj_align);
+ unsigned int obj_align = get_object_alignment (t);
+ attrs.align = MAX (attrs.align, obj_align);
}
}
object to contain the negative offset. */
if (apply_bitpos)
{
- offset = plus_constant (offset, -(apply_bitpos / BITS_PER_UNIT));
- if (size)
- size = plus_constant (size, apply_bitpos / BITS_PER_UNIT);
+ gcc_assert (attrs.offset_known_p);
+ attrs.offset -= apply_bitpos / BITS_PER_UNIT;
+ if (attrs.size_known_p)
+ attrs.size += apply_bitpos / BITS_PER_UNIT;
}
/* Now set the attributes we computed above. */
- MEM_ATTRS (ref)
- = get_mem_attrs (alias, expr, offset, size, align,
- TYPE_ADDR_SPACE (type), GET_MODE (ref));
+ attrs.addrspace = TYPE_ADDR_SPACE (type);
+ set_mem_attrs (ref, &attrs);
/* If this is already known to be a scalar or aggregate, we are done. */
if (MEM_IN_STRUCT_P (ref) || MEM_SCALAR_P (ref))
void
set_mem_alias_set (rtx mem, alias_set_type set)
{
+ struct mem_attrs attrs;
+
/* If the new and old alias sets don't conflict, something is wrong. */
gcc_checking_assert (alias_sets_conflict_p (set, MEM_ALIAS_SET (mem)));
-
- MEM_ATTRS (mem) = get_mem_attrs (set, MEM_EXPR (mem), MEM_OFFSET (mem),
- MEM_SIZE (mem), MEM_ALIGN (mem),
- MEM_ADDR_SPACE (mem), GET_MODE (mem));
+ attrs = *get_mem_attrs (mem);
+ attrs.alias = set;
+ set_mem_attrs (mem, &attrs);
}
/* Set the address space of MEM to ADDRSPACE (target-defined). */
void
set_mem_addr_space (rtx mem, addr_space_t addrspace)
{
- MEM_ATTRS (mem) = get_mem_attrs (MEM_ALIAS_SET (mem), MEM_EXPR (mem),
- MEM_OFFSET (mem), MEM_SIZE (mem),
- MEM_ALIGN (mem), addrspace, GET_MODE (mem));
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.addrspace = addrspace;
+ set_mem_attrs (mem, &attrs);
}
/* Set the alignment of MEM to ALIGN bits. */
void
set_mem_align (rtx mem, unsigned int align)
{
- MEM_ATTRS (mem) = get_mem_attrs (MEM_ALIAS_SET (mem), MEM_EXPR (mem),
- MEM_OFFSET (mem), MEM_SIZE (mem), align,
- MEM_ADDR_SPACE (mem), GET_MODE (mem));
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.align = align;
+ set_mem_attrs (mem, &attrs);
}
/* Set the expr for MEM to EXPR. */
void
set_mem_expr (rtx mem, tree expr)
{
- MEM_ATTRS (mem)
- = get_mem_attrs (MEM_ALIAS_SET (mem), expr, MEM_OFFSET (mem),
- MEM_SIZE (mem), MEM_ALIGN (mem),
- MEM_ADDR_SPACE (mem), GET_MODE (mem));
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.expr = expr;
+ set_mem_attrs (mem, &attrs);
}
/* Set the offset of MEM to OFFSET. */
void
-set_mem_offset (rtx mem, rtx offset)
+set_mem_offset (rtx mem, HOST_WIDE_INT offset)
+{
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.offset_known_p = true;
+ attrs.offset = offset;
+ set_mem_attrs (mem, &attrs);
+}
+
+/* Clear the offset of MEM. */
+
+void
+clear_mem_offset (rtx mem)
{
- MEM_ATTRS (mem) = get_mem_attrs (MEM_ALIAS_SET (mem), MEM_EXPR (mem),
- offset, MEM_SIZE (mem), MEM_ALIGN (mem),
- MEM_ADDR_SPACE (mem), GET_MODE (mem));
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.offset_known_p = false;
+ set_mem_attrs (mem, &attrs);
}
/* Set the size of MEM to SIZE. */
void
-set_mem_size (rtx mem, rtx size)
+set_mem_size (rtx mem, HOST_WIDE_INT size)
{
- MEM_ATTRS (mem) = get_mem_attrs (MEM_ALIAS_SET (mem), MEM_EXPR (mem),
- MEM_OFFSET (mem), size, MEM_ALIGN (mem),
- MEM_ADDR_SPACE (mem), GET_MODE (mem));
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.size_known_p = true;
+ attrs.size = size;
+ set_mem_attrs (mem, &attrs);
+}
+
+/* Clear the size of MEM. */
+
+void
+clear_mem_size (rtx mem)
+{
+ struct mem_attrs attrs;
+
+ attrs = *get_mem_attrs (mem);
+ attrs.size_known_p = false;
+ set_mem_attrs (mem, &attrs);
}
\f
/* Return a memory reference like MEMREF, but with its mode changed to MODE
rtx
change_address (rtx memref, enum machine_mode mode, rtx addr)
{
- rtx new_rtx = change_address_1 (memref, mode, addr, 1), size;
+ rtx new_rtx = change_address_1 (memref, mode, addr, 1);
enum machine_mode mmode = GET_MODE (new_rtx);
- unsigned int align;
+ struct mem_attrs attrs, *defattrs;
- size = mmode == BLKmode ? 0 : GEN_INT (GET_MODE_SIZE (mmode));
- align = mmode == BLKmode ? BITS_PER_UNIT : GET_MODE_ALIGNMENT (mmode);
+ attrs = *get_mem_attrs (memref);
+ defattrs = mode_mem_attrs[(int) mmode];
+ attrs.expr = NULL_TREE;
+ attrs.offset_known_p = false;
+ attrs.size_known_p = defattrs->size_known_p;
+ attrs.size = defattrs->size;
+ attrs.align = defattrs->align;
/* If there are no changes, just return the original memory reference. */
if (new_rtx == memref)
{
- if (MEM_ATTRS (memref) == 0
- || (MEM_EXPR (memref) == NULL
- && MEM_OFFSET (memref) == NULL
- && MEM_SIZE (memref) == size
- && MEM_ALIGN (memref) == align))
+ if (mem_attrs_eq_p (get_mem_attrs (memref), &attrs))
return new_rtx;
new_rtx = gen_rtx_MEM (mmode, XEXP (memref, 0));
MEM_COPY_ATTRIBUTES (new_rtx, memref);
}
- MEM_ATTRS (new_rtx)
- = get_mem_attrs (MEM_ALIAS_SET (memref), 0, 0, size, align,
- MEM_ADDR_SPACE (memref), mmode);
-
+ set_mem_attrs (new_rtx, &attrs);
return new_rtx;
}
{
rtx addr = XEXP (memref, 0);
rtx new_rtx;
- rtx memoffset = MEM_OFFSET (memref);
- rtx size = 0;
- unsigned int memalign = MEM_ALIGN (memref);
- addr_space_t as = MEM_ADDR_SPACE (memref);
- enum machine_mode address_mode = targetm.addr_space.address_mode (as);
+ enum machine_mode address_mode;
int pbits;
+ struct mem_attrs attrs, *defattrs;
+ unsigned HOST_WIDE_INT max_align;
+
+ attrs = *get_mem_attrs (memref);
/* If there are no changes, just return the original memory reference. */
if (mode == GET_MODE (memref) && !offset
- && (!validate || memory_address_addr_space_p (mode, addr, as)))
+ && (!validate || memory_address_addr_space_p (mode, addr,
+ attrs.addrspace)))
return memref;
/* ??? Prefer to create garbage instead of creating shared rtl.
/* Convert a possibly large offset to a signed value within the
range of the target address space. */
+ address_mode = targetm.addr_space.address_mode (attrs.addrspace);
pbits = GET_MODE_BITSIZE (address_mode);
if (HOST_BITS_PER_WIDE_INT > pbits)
{
/* Compute the new values of the memory attributes due to this adjustment.
We add the offsets and update the alignment. */
- if (memoffset)
- memoffset = GEN_INT (offset + INTVAL (memoffset));
+ if (attrs.offset_known_p)
+ attrs.offset += offset;
/* Compute the new alignment by taking the MIN of the alignment and the
lowest-order set bit in OFFSET, but don't change the alignment if OFFSET
if zero. */
if (offset != 0)
- memalign
- = MIN (memalign,
- (unsigned HOST_WIDE_INT) (offset & -offset) * BITS_PER_UNIT);
+ {
+ max_align = (offset & -offset) * BITS_PER_UNIT;
+ attrs.align = MIN (attrs.align, max_align);
+ }
/* We can compute the size in a number of ways. */
- if (GET_MODE (new_rtx) != BLKmode)
- size = GEN_INT (GET_MODE_SIZE (GET_MODE (new_rtx)));
- else if (MEM_SIZE (memref))
- size = plus_constant (MEM_SIZE (memref), -offset);
+ defattrs = mode_mem_attrs[(int) GET_MODE (new_rtx)];
+ if (defattrs->size_known_p)
+ {
+ attrs.size_known_p = true;
+ attrs.size = defattrs->size;
+ }
+ else if (attrs.size_known_p)
+ attrs.size -= offset;
- MEM_ATTRS (new_rtx) = get_mem_attrs (MEM_ALIAS_SET (memref), MEM_EXPR (memref),
- memoffset, size, memalign, as,
- GET_MODE (new_rtx));
+ set_mem_attrs (new_rtx, &attrs);
/* At some point, we should validate that this offset is within the object,
if all the appropriate values are known. */
offset_address (rtx memref, rtx offset, unsigned HOST_WIDE_INT pow2)
{
rtx new_rtx, addr = XEXP (memref, 0);
- addr_space_t as = MEM_ADDR_SPACE (memref);
- enum machine_mode address_mode = targetm.addr_space.address_mode (as);
+ enum machine_mode address_mode;
+ struct mem_attrs attrs, *defattrs;
+ attrs = *get_mem_attrs (memref);
+ address_mode = targetm.addr_space.address_mode (attrs.addrspace);
new_rtx = simplify_gen_binary (PLUS, address_mode, addr, offset);
/* At this point we don't know _why_ the address is invalid. It
being able to recognize the magic around pic_offset_table_rtx.
This stuff is fragile, and is yet another example of why it is
bad to expose PIC machinery too early. */
- if (! memory_address_addr_space_p (GET_MODE (memref), new_rtx, as)
+ if (! memory_address_addr_space_p (GET_MODE (memref), new_rtx,
+ attrs.addrspace)
&& GET_CODE (addr) == PLUS
&& XEXP (addr, 0) == pic_offset_table_rtx)
{
/* Update the alignment to reflect the offset. Reset the offset, which
we don't know. */
- MEM_ATTRS (new_rtx)
- = get_mem_attrs (MEM_ALIAS_SET (memref), MEM_EXPR (memref), 0, 0,
- MIN (MEM_ALIGN (memref), pow2 * BITS_PER_UNIT),
- as, GET_MODE (new_rtx));
+ defattrs = mode_mem_attrs[(int) GET_MODE (new_rtx)];
+ attrs.offset_known_p = false;
+ attrs.size_known_p = defattrs->size_known_p;
+ attrs.size = defattrs->size;
+ attrs.align = MIN (attrs.align, pow2 * BITS_PER_UNIT);
+ set_mem_attrs (new_rtx, &attrs);
return new_rtx;
}
widen_memory_access (rtx memref, enum machine_mode mode, HOST_WIDE_INT offset)
{
rtx new_rtx = adjust_address_1 (memref, mode, offset, 1, 1);
- tree expr = MEM_EXPR (new_rtx);
- rtx memoffset = MEM_OFFSET (new_rtx);
+ struct mem_attrs attrs;
unsigned int size = GET_MODE_SIZE (mode);
/* If there are no changes, just return the original memory reference. */
if (new_rtx == memref)
return new_rtx;
+ attrs = *get_mem_attrs (new_rtx);
+
/* If we don't know what offset we were at within the expression, then
we can't know if we've overstepped the bounds. */
- if (! memoffset)
- expr = NULL_TREE;
+ if (! attrs.offset_known_p)
+ attrs.expr = NULL_TREE;
- while (expr)
+ while (attrs.expr)
{
- if (TREE_CODE (expr) == COMPONENT_REF)
+ if (TREE_CODE (attrs.expr) == COMPONENT_REF)
{
- tree field = TREE_OPERAND (expr, 1);
- tree offset = component_ref_field_offset (expr);
+ tree field = TREE_OPERAND (attrs.expr, 1);
+ tree offset = component_ref_field_offset (attrs.expr);
if (! DECL_SIZE_UNIT (field))
{
- expr = NULL_TREE;
+ attrs.expr = NULL_TREE;
break;
}
otherwise strip back to the containing structure. */
if (TREE_CODE (DECL_SIZE_UNIT (field)) == INTEGER_CST
&& compare_tree_int (DECL_SIZE_UNIT (field), size) >= 0
- && INTVAL (memoffset) >= 0)
+ && attrs.offset >= 0)
break;
if (! host_integerp (offset, 1))
{
- expr = NULL_TREE;
+ attrs.expr = NULL_TREE;
break;
}
- expr = TREE_OPERAND (expr, 0);
- memoffset
- = (GEN_INT (INTVAL (memoffset)
- + tree_low_cst (offset, 1)
- + (tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1)
- / BITS_PER_UNIT)));
+ attrs.expr = TREE_OPERAND (attrs.expr, 0);
+ attrs.offset += tree_low_cst (offset, 1);
+ attrs.offset += (tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1)
+ / BITS_PER_UNIT);
}
/* Similarly for the decl. */
- else if (DECL_P (expr)
- && DECL_SIZE_UNIT (expr)
- && TREE_CODE (DECL_SIZE_UNIT (expr)) == INTEGER_CST
- && compare_tree_int (DECL_SIZE_UNIT (expr), size) >= 0
- && (! memoffset || INTVAL (memoffset) >= 0))
+ else if (DECL_P (attrs.expr)
+ && DECL_SIZE_UNIT (attrs.expr)
+ && TREE_CODE (DECL_SIZE_UNIT (attrs.expr)) == INTEGER_CST
+ && compare_tree_int (DECL_SIZE_UNIT (attrs.expr), size) >= 0
+ && (! attrs.offset_known_p || attrs.offset >= 0))
break;
else
{
/* The widened memory access overflows the expression, which means
that it could alias another expression. Zap it. */
- expr = NULL_TREE;
+ attrs.expr = NULL_TREE;
break;
}
}
- if (! expr)
- memoffset = NULL_RTX;
+ if (! attrs.expr)
+ attrs.offset_known_p = false;
/* The widened memory may alias other stuff, so zap the alias set. */
/* ??? Maybe use get_alias_set on any remaining expression. */
-
- MEM_ATTRS (new_rtx) = get_mem_attrs (0, expr, memoffset, GEN_INT (size),
- MEM_ALIGN (new_rtx),
- MEM_ADDR_SPACE (new_rtx), mode);
-
+ attrs.alias = 0;
+ attrs.size_known_p = true;
+ attrs.size = size;
+ set_mem_attrs (new_rtx, &attrs);
return new_rtx;
}
\f
{
tree d = spill_slot_decl;
rtx rd;
+ struct mem_attrs attrs;
if (d || !force_build_p)
return d;
rd = gen_rtx_MEM (BLKmode, frame_pointer_rtx);
MEM_NOTRAP_P (rd) = 1;
- MEM_ATTRS (rd) = get_mem_attrs (new_alias_set (), d, const0_rtx,
- NULL_RTX, 0, ADDR_SPACE_GENERIC, BLKmode);
+ attrs = *mode_mem_attrs[(int) BLKmode];
+ attrs.alias = new_alias_set ();
+ attrs.expr = d;
+ set_mem_attrs (rd, &attrs);
SET_DECL_RTL (d, rd);
return d;
void
set_mem_attrs_for_spill (rtx mem)
{
- alias_set_type alias;
- rtx addr, offset;
- tree expr;
+ struct mem_attrs attrs;
+ rtx addr;
- expr = get_spill_slot_decl (true);
- alias = MEM_ALIAS_SET (DECL_RTL (expr));
+ attrs = *get_mem_attrs (mem);
+ attrs.expr = get_spill_slot_decl (true);
+ attrs.alias = MEM_ALIAS_SET (DECL_RTL (attrs.expr));
+ attrs.addrspace = ADDR_SPACE_GENERIC;
/* We expect the incoming memory to be of the form:
(mem:MODE (plus (reg sfp) (const_int offset)))
with perhaps the plus missing for offset = 0. */
addr = XEXP (mem, 0);
- offset = const0_rtx;
+ attrs.offset_known_p = true;
+ attrs.offset = 0;
if (GET_CODE (addr) == PLUS
&& CONST_INT_P (XEXP (addr, 1)))
- offset = XEXP (addr, 1);
+ attrs.offset = INTVAL (XEXP (addr, 1));
- MEM_ATTRS (mem) = get_mem_attrs (alias, expr, offset,
- MEM_SIZE (mem), MEM_ALIGN (mem),
- ADDR_SPACE_GENERIC, GET_MODE (mem));
+ set_mem_attrs (mem, &attrs);
MEM_NOTRAP_P (mem) = 1;
}
\f
{
reset_used_flags (PATTERN (p));
reset_used_flags (REG_NOTES (p));
+ if (CALL_P (p))
+ reset_used_flags (CALL_INSN_FUNCTION_USAGE (p));
}
/* Make sure that virtual stack slots are not shared. */
case PC:
case CC0:
case RETURN:
+ case SIMPLE_RETURN:
case SCRATCH:
return;
/* SCRATCH must be shared because they represent distinct values. */
{
reset_used_flags (PATTERN (p));
reset_used_flags (REG_NOTES (p));
+ if (CALL_P (p))
+ reset_used_flags (CALL_INSN_FUNCTION_USAGE (p));
if (GET_CODE (PATTERN (p)) == SEQUENCE)
{
int i;
gcc_assert (INSN_P (q));
reset_used_flags (PATTERN (q));
reset_used_flags (REG_NOTES (q));
+ if (CALL_P (q))
+ reset_used_flags (CALL_INSN_FUNCTION_USAGE (q));
}
}
}
{
verify_rtx_sharing (PATTERN (p), p);
verify_rtx_sharing (REG_NOTES (p), p);
+ if (CALL_P (p))
+ verify_rtx_sharing (CALL_INSN_FUNCTION_USAGE (p), p);
}
timevar_pop (TV_VERIFY_RTL_SHARING);
{
PATTERN (insn) = copy_rtx_if_shared (PATTERN (insn));
REG_NOTES (insn) = copy_rtx_if_shared (REG_NOTES (insn));
+ if (CALL_P (insn))
+ CALL_INSN_FUNCTION_USAGE (insn)
+ = copy_rtx_if_shared (CALL_INSN_FUNCTION_USAGE (insn));
}
}
case CODE_LABEL:
case PC:
case CC0:
+ case RETURN:
+ case SIMPLE_RETURN:
case SCRATCH:
/* SCRATCH must be shared because they represent distinct values. */
return;
case CODE_LABEL:
case PC:
case CC0:
+ case RETURN:
+ case SIMPLE_RETURN:
return;
case DEBUG_INSN:
return insn;
}
-/* Return the last CODE_LABEL before the insn INSN, or 0 if there is none. */
-
-rtx
-prev_label (rtx insn)
-{
- while (insn)
- {
- insn = PREV_INSN (insn);
- if (insn == 0 || LABEL_P (insn))
- break;
- }
-
- return insn;
-}
-
-/* Return the last label to mark the same position as LABEL. Return null
- if LABEL itself is null. */
+/* Return the last label to mark the same position as LABEL. Return LABEL
+ itself if it is null or any return rtx. */
rtx
skip_consecutive_labels (rtx label)
{
rtx insn;
+ if (label && ANY_RETURN_P (label))
+ return label;
+
for (insn = label; insn != 0 && !INSN_P (insn); insn = NEXT_INSN (insn))
if (LABEL_P (insn))
label = insn;
case REG_NORETURN:
case REG_SETJMP:
+ case REG_TM:
for (insn = insn_last; insn != NULL_RTX; insn = PREV_INSN (insn))
{
if (CALL_P (insn))
break;
#endif
+ case REG_ARGS_SIZE:
+ fixup_args_size_notes (NULL_RTX, insn_last, INTVAL (XEXP (note, 0)));
+ break;
+
default:
break;
}
return REG_NOTES (insn);
}
+
+/* Like set_unique_reg_note, but don't do anything unless INSN sets DST. */
+rtx
+set_dst_reg_note (rtx insn, enum reg_note kind, rtx datum, rtx dst)
+{
+ rtx set = single_set (insn);
+
+ if (set && SET_DEST (set) == dst)
+ return set_unique_reg_note (insn, kind, datum);
+ return NULL_RTX;
+}
\f
/* Return an indication of which type of insn should have X as a body.
The value is CODE_LABEL, INSN, CALL_INSN or JUMP_INSN. */
return CODE_LABEL;
if (GET_CODE (x) == CALL)
return CALL_INSN;
- if (GET_CODE (x) == RETURN)
+ if (ANY_RETURN_P (x))
return JUMP_INSN;
if (GET_CODE (x) == SET)
{
start_sequence ();
- for (last = first; last && NEXT_INSN (last); last = NEXT_INSN (last));
+ for (last = first; last && NEXT_INSN (last); last = NEXT_INSN (last))
+ ;
set_first_insn (first);
set_last_insn (last);
switch (code)
{
case REG:
+ case DEBUG_EXPR:
case CONST_INT:
case CONST_DOUBLE:
case CONST_FIXED:
case CODE_LABEL:
case PC:
case CC0:
+ case RETURN:
+ case SIMPLE_RETURN:
return orig;
case CLOBBER:
if (REG_P (XEXP (orig, 0)) && REGNO (XEXP (orig, 0)) < FIRST_PSEUDO_REGISTER)
return CONST0_RTX (mode);
else if (x == CONST1_RTX (inner))
return CONST1_RTX (mode);
+ else if (x == CONSTM1_RTX (inner))
+ return CONSTM1_RTX (mode);
}
return gen_rtx_raw_CONST_VECTOR (mode, v);
init_emit_regs (void)
{
int i;
+ enum machine_mode mode;
+ mem_attrs *attrs;
/* Reset register attributes */
htab_empty (reg_attrs_htab);
/* Assign register numbers to the globally defined register rtx. */
pc_rtx = gen_rtx_fmt_ (PC, VOIDmode);
ret_rtx = gen_rtx_fmt_ (RETURN, VOIDmode);
+ simple_return_rtx = gen_rtx_fmt_ (SIMPLE_RETURN, VOIDmode);
cc0_rtx = gen_rtx_fmt_ (CC0, VOIDmode);
stack_pointer_rtx = gen_raw_REG (Pmode, STACK_POINTER_REGNUM);
frame_pointer_rtx = gen_raw_REG (Pmode, FRAME_POINTER_REGNUM);
pic_offset_table_rtx = gen_raw_REG (Pmode, PIC_OFFSET_TABLE_REGNUM);
else
pic_offset_table_rtx = NULL_RTX;
+
+ for (i = 0; i < (int) MAX_MACHINE_MODE; i++)
+ {
+ mode = (enum machine_mode) i;
+ attrs = ggc_alloc_cleared_mem_attrs ();
+ attrs->align = BITS_PER_UNIT;
+ attrs->addrspace = ADDR_SPACE_GENERIC;
+ if (mode != BLKmode)
+ {
+ attrs->size_known_p = true;
+ attrs->size = GET_MODE_SIZE (mode);
+ if (STRICT_ALIGNMENT)
+ attrs->align = GET_MODE_ALIGNMENT (mode);
+ }
+ mode_mem_attrs[i] = attrs;
+ }
}
/* Create some permanent unique rtl objects shared between all functions. */
dconsthalf = dconst1;
SET_REAL_EXP (&dconsthalf, REAL_EXP (&dconsthalf) - 1);
- for (i = 0; i < (int) ARRAY_SIZE (const_tiny_rtx); i++)
+ for (i = 0; i < 3; i++)
{
const REAL_VALUE_TYPE *const r =
(i == 0 ? &dconst0 : i == 1 ? &dconst1 : &dconst2);
const_tiny_rtx[i][(int) mode] = GEN_INT (i);
}
+ const_tiny_rtx[3][(int) VOIDmode] = constm1_rtx;
+
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
+ mode != VOIDmode;
+ mode = GET_MODE_WIDER_MODE (mode))
+ const_tiny_rtx[3][(int) mode] = constm1_rtx;
+
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_PARTIAL_INT);
+ mode != VOIDmode;
+ mode = GET_MODE_WIDER_MODE (mode))
+ const_tiny_rtx[3][(int) mode] = constm1_rtx;
+
for (mode = GET_CLASS_NARROWEST_MODE (MODE_COMPLEX_INT);
mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
{
const_tiny_rtx[0][(int) mode] = gen_const_vector (mode, 0);
const_tiny_rtx[1][(int) mode] = gen_const_vector (mode, 1);
+ const_tiny_rtx[3][(int) mode] = gen_const_vector (mode, 3);
}
for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT);
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