#include "coretypes.h"
#include "tm.h"
#include "diagnostic-core.h"
-#include "toplev.h"
#include "rtl.h"
#include "tree.h"
#include "tm_p.h"
#include "df.h"
#include "params.h"
#include "target.h"
+#include "tree-flow.h"
+
+struct target_rtl default_target_rtl;
+#if SWITCHABLE_TARGET
+struct target_rtl *this_target_rtl = &default_target_rtl;
+#endif
+
+#define initial_regno_reg_rtx (this_target_rtl->x_initial_regno_reg_rtx)
/* Commonly used modes. */
static GTY(()) int label_num = 1;
-/* Commonly used rtx's, so that we only need space for one copy.
- These are initialized once for the entire compilation.
- All of these are unique; no other rtx-object will be equal to any
- of these. */
-
-rtx global_rtl[GR_MAX];
-
-/* Commonly used RTL for hard registers. These objects are not necessarily
- unique, so we allocate them separately from global_rtl. They are
- initialized once per compilation unit, then copied into regno_reg_rtx
- at the beginning of each function. */
-static GTY(()) rtx static_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
-
/* 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. */
FIXED_VALUE_TYPE fconst0[MAX_FCONST0];
FIXED_VALUE_TYPE fconst1[MAX_FCONST1];
-/* All references to the following fixed hard registers go through
- these unique rtl objects. On machines where the frame-pointer and
- arg-pointer are the same register, they use the same unique object.
-
- After register allocation, other rtl objects which used to be pseudo-regs
- may be clobbered to refer to the frame-pointer register.
- But references that were originally to the frame-pointer can be
- distinguished from the others because they contain frame_pointer_rtx.
-
- When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
- tricky: until register elimination has taken place hard_frame_pointer_rtx
- should be used if it is being set, and frame_pointer_rtx otherwise. After
- register elimination hard_frame_pointer_rtx should always be used.
- On machines where the two registers are same (most) then these are the
- same.
-
- In an inline procedure, the stack and frame pointer rtxs may not be
- used for anything else. */
-rtx pic_offset_table_rtx; /* (REG:Pmode PIC_OFFSET_TABLE_REGNUM) */
-
-/* This is used to implement __builtin_return_address for some machines.
- See for instance the MIPS port. */
-rtx return_address_pointer_rtx; /* (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM) */
-
/* We make one copy of (const_int C) where C is in
[- MAX_SAVED_CONST_INT, MAX_SAVED_CONST_INT]
to save space during the compilation and simplify comparisons of
{
const reg_attrs *const p = (const reg_attrs *) x;
- return ((p->offset * 1000) ^ (long) p->decl);
+ return ((p->offset * 1000) ^ (intptr_t) p->decl);
}
/* Returns nonzero if the value represented by X (which is really a
if (regno == FRAME_POINTER_REGNUM
&& (!reload_completed || frame_pointer_needed))
return frame_pointer_rtx;
-#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
+#if !HARD_FRAME_POINTER_IS_FRAME_POINTER
if (regno == HARD_FRAME_POINTER_REGNUM
&& (!reload_completed || frame_pointer_needed))
return hard_frame_pointer_rtx;
#endif
-#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && HARD_FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
+#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && !HARD_FRAME_POINTER_IS_ARG_POINTER
if (regno == ARG_POINTER_REGNUM)
return arg_pointer_rtx;
#endif
return return_address_pointer_rtx;
#endif
if (regno == (unsigned) PIC_OFFSET_TABLE_REGNUM
+ && PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
&& fixed_regs[PIC_OFFSET_TABLE_REGNUM])
return pic_offset_table_rtx;
if (regno == STACK_POINTER_REGNUM)
/* This function can't use
if (!MEM_EXPR (mem) || !MEM_OFFSET (mem)
|| !CONST_INT_P (MEM_OFFSET (mem))
- || (get_object_alignment (MEM_EXPR (mem), MEM_ALIGN (mem), align)
+ || (MAX (MEM_ALIGN (mem),
+ get_object_alignment (MEM_EXPR (mem), align))
< align))
return -1;
else
set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
HOST_WIDE_INT bitpos)
{
- alias_set_type alias = MEM_ALIAS_SET (ref);
- tree expr = MEM_EXPR (ref);
- rtx offset = MEM_OFFSET (ref);
- rtx size = MEM_SIZE (ref);
- unsigned int align = MEM_ALIGN (ref);
+ 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;
&& TREE_CODE (type) != COMPLEX_TYPE)
MEM_SCALAR_P (ref) = 1;
+ /* Default values from pre-existing memory attributes if present. */
+ if (MEM_ATTRS (ref))
+ {
+ /* ??? 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);
+ }
+
+ /* Otherwise, default values from the mode of the MEM reference. */
+ else if (GET_MODE (ref) != BLKmode)
+ {
+ /* Respect mode size. */
+ size = GEN_INT (GET_MODE_SIZE (GET_MODE (ref)));
+ /* ??? 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 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))
else if (TREE_CODE (t) == MEM_REF)
{
tree op0 = TREE_OPERAND (t, 0);
- unsigned HOST_WIDE_INT aoff = BITS_PER_UNIT;
- if (host_integerp (TREE_OPERAND (t, 1), 1))
- {
- unsigned HOST_WIDE_INT ioff = TREE_INT_CST_LOW (TREE_OPERAND (t, 1));
- aoff = (ioff & -ioff) * BITS_PER_UNIT;
- }
- if (TREE_CODE (op0) == ADDR_EXPR && DECL_P (TREE_OPERAND (op0, 0)))
- align = MAX (align, DECL_ALIGN (TREE_OPERAND (op0, 0)));
- else if (TREE_CODE (op0) == ADDR_EXPR
- && CONSTANT_CLASS_P (TREE_OPERAND (op0, 0)))
+ if (TREE_CODE (op0) == ADDR_EXPR
+ && (DECL_P (TREE_OPERAND (op0, 0))
+ || CONSTANT_CLASS_P (TREE_OPERAND (op0, 0))))
{
- align = TYPE_ALIGN (TREE_TYPE (TREE_OPERAND (op0, 0)));
+ if (DECL_P (TREE_OPERAND (op0, 0)))
+ 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)));
#ifdef CONSTANT_ALIGNMENT
- align = CONSTANT_ALIGNMENT (TREE_OPERAND (op0, 0), align);
+ align = CONSTANT_ALIGNMENT (TREE_OPERAND (op0, 0), 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);
+ }
}
else
- /* This technically isn't correct. We can't really derive
- alignment information from types. */
- align = MAX (align,
- TYPE_ALIGN (TREE_TYPE (TREE_TYPE (TREE_OPERAND (t, 1)))));
-
- if (!integer_zerop (TREE_OPERAND (t, 1)) && aoff < align)
- align = aoff;
+ /* ??? This isn't fully correct, we can't set the alignment from the
+ type in all cases. */
+ align = MAX (align, TYPE_ALIGN (type));
}
- else if (TREE_CODE (t) == MISALIGNED_INDIRECT_REF)
- {
- if (integer_zerop (TREE_OPERAND (t, 1)))
- /* We don't know anything about the alignment. */
- align = BITS_PER_UNIT;
- else
- align = tree_low_cst (TREE_OPERAND (t, 1), 1);
- }
+ 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));
/* If the size is known, we can set that. */
if (TYPE_SIZE_UNIT (type) && host_integerp (TYPE_SIZE_UNIT (type), 1))
|| TREE_CODE (t) == SAVE_EXPR)
t = TREE_OPERAND (t, 0);
- /* We may look through structure-like accesses for the purposes of
- examining TREE_THIS_NOTRAP, but not array-like accesses. */
- base = t;
- while (TREE_CODE (base) == COMPONENT_REF
- || TREE_CODE (base) == REALPART_EXPR
- || TREE_CODE (base) == IMAGPART_EXPR
- || TREE_CODE (base) == BIT_FIELD_REF)
- base = TREE_OPERAND (base, 0);
-
- if (TREE_CODE (base) == MEM_REF
- && TREE_CODE (TREE_OPERAND (base, 0)) == ADDR_EXPR)
- base = TREE_OPERAND (TREE_OPERAND (base, 0), 0);
- if (DECL_P (base))
- {
- if (CODE_CONTAINS_STRUCT (TREE_CODE (base), TS_DECL_WITH_VIS))
- MEM_NOTRAP_P (ref) = !DECL_WEAK (base);
- else
- MEM_NOTRAP_P (ref) = 1;
- }
- else
- MEM_NOTRAP_P (ref) = TREE_THIS_NOTRAP (base);
+ /* Note whether this expression can trap. */
+ MEM_NOTRAP_P (ref) = !tree_could_trap_p (t);
- base = get_base_address (base);
+ base = get_base_address (t);
if (base && DECL_P (base)
&& TREE_READONLY (base)
- && (TREE_STATIC (base) || DECL_EXTERNAL (base)))
+ && (TREE_STATIC (base) || DECL_EXTERNAL (base))
+ && !TREE_THIS_VOLATILE (base))
MEM_READONLY_P (ref) = 1;
/* If this expression uses it's parent's alias set, mark it such
}
/* If this is an indirect reference, record it. */
- else if (TREE_CODE (t) == MEM_REF
- || TREE_CODE (t) == MISALIGNED_INDIRECT_REF)
+ else if (TREE_CODE (t) == MEM_REF)
{
expr = t;
offset = const0_rtx;
/* If this is an indirect reference, record it. */
else if (TREE_CODE (t) == MEM_REF
- || TREE_CODE (t) == MISALIGNED_INDIRECT_REF)
+ || TREE_CODE (t) == TARGET_MEM_REF)
{
expr = t;
offset = const0_rtx;
if (!align_computed && !INDIRECT_REF_P (t))
{
- unsigned int obj_align
- = get_object_alignment (t, align, BIGGEST_ALIGNMENT);
+ unsigned int obj_align = get_object_alignment (t, BIGGEST_ALIGNMENT);
align = MAX (align, obj_align);
}
}
void
set_mem_alias_set (rtx mem, alias_set_type set)
{
-#ifdef ENABLE_CHECKING
/* If the new and old alias sets don't conflict, something is wrong. */
- gcc_assert (alias_sets_conflict_p (set, MEM_ALIAS_SET (mem)));
-#endif
+ 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),
DECL_ARTIFICIAL (d) = 1;
DECL_IGNORED_P (d) = 1;
TREE_USED (d) = 1;
- TREE_THIS_NOTRAP (d) = 1;
spill_slot_decl = d;
rd = gen_rtx_MEM (BLKmode, frame_pointer_rtx);
set_used_decls (DECL_INITIAL (cfun->decl));
/* Make sure that virtual parameters are not shared. */
- for (decl = DECL_ARGUMENTS (cfun->decl); decl; decl = TREE_CHAIN (decl))
+ for (decl = DECL_ARGUMENTS (cfun->decl); decl; decl = DECL_CHAIN (decl))
set_used_flags (DECL_RTL (decl));
reset_used_flags (stack_slot_list);
{
rtx p;
+ timevar_push (TV_VERIFY_RTL_SHARING);
+
for (p = get_insns (); p; p = NEXT_INSN (p))
if (INSN_P (p))
{
verify_rtx_sharing (PATTERN (p), p);
verify_rtx_sharing (REG_NOTES (p), p);
}
+
+ timevar_pop (TV_VERIFY_RTL_SHARING);
}
/* Go through all the RTL insn bodies and copy any invalid shared structure.
tree t;
/* Mark decls. */
- for (t = BLOCK_VARS (blk); t; t = TREE_CHAIN (t))
+ for (t = BLOCK_VARS (blk); t; t = DECL_CHAIN (t))
if (DECL_RTL_SET_P (t))
set_used_flags (DECL_RTL (t));
return;
}
-/* Clear all the USED bits in X to allow copy_rtx_if_shared to be used
- to look for shared sub-parts. */
+/* Set the USED bit in X and its non-shareable subparts to FLAG. */
-void
-reset_used_flags (rtx x)
+static void
+mark_used_flags (rtx x, int flag)
{
int i, j;
enum rtx_code code;
break;
}
- RTX_FLAG (x, used) = 0;
+ RTX_FLAG (x, used) = flag;
format_ptr = GET_RTX_FORMAT (code);
length = GET_RTX_LENGTH (code);
x = XEXP (x, i);
goto repeat;
}
- reset_used_flags (XEXP (x, i));
+ mark_used_flags (XEXP (x, i), flag);
break;
case 'E':
for (j = 0; j < XVECLEN (x, i); j++)
- reset_used_flags (XVECEXP (x, i, j));
+ mark_used_flags (XVECEXP (x, i, j), flag);
break;
}
}
}
-/* Set all the USED bits in X to allow copy_rtx_if_shared to be used
+/* Clear all the USED bits in X to allow copy_rtx_if_shared to be used
to look for shared sub-parts. */
void
-set_used_flags (rtx x)
+reset_used_flags (rtx x)
{
- int i, j;
- enum rtx_code code;
- const char *format_ptr;
-
- if (x == 0)
- return;
-
- code = GET_CODE (x);
-
- /* These types may be freely shared so we needn't do any resetting
- for them. */
-
- switch (code)
- {
- case REG:
- case DEBUG_EXPR:
- case VALUE:
- case CONST_INT:
- case CONST_DOUBLE:
- case CONST_FIXED:
- case CONST_VECTOR:
- case SYMBOL_REF:
- case CODE_LABEL:
- case PC:
- case CC0:
- return;
-
- case DEBUG_INSN:
- case INSN:
- case JUMP_INSN:
- case CALL_INSN:
- case NOTE:
- case LABEL_REF:
- case BARRIER:
- /* The chain of insns is not being copied. */
- return;
-
- default:
- break;
- }
-
- RTX_FLAG (x, used) = 1;
+ mark_used_flags (x, 0);
+}
- format_ptr = GET_RTX_FORMAT (code);
- for (i = 0; i < GET_RTX_LENGTH (code); i++)
- {
- switch (*format_ptr++)
- {
- case 'e':
- set_used_flags (XEXP (x, i));
- break;
+/* Set all the USED bits in X to allow copy_rtx_if_shared to be used
+ to look for shared sub-parts. */
- case 'E':
- for (j = 0; j < XVECLEN (x, i); j++)
- set_used_flags (XVECEXP (x, i, j));
- break;
- }
- }
+void
+set_used_flags (rtx x)
+{
+ mark_used_flags (x, 1);
}
\f
/* Copy X if necessary so that it won't be altered by changes in OTHER.
return insn;
}
+/* Return the next insn after INSN that is not a NOTE nor DEBUG_INSN.
+ This routine does not look inside SEQUENCEs. */
+
+rtx
+next_nonnote_nondebug_insn (rtx insn)
+{
+ while (insn)
+ {
+ insn = NEXT_INSN (insn);
+ if (insn == 0 || (!NOTE_P (insn) && !DEBUG_INSN_P (insn)))
+ break;
+ }
+
+ return insn;
+}
+
+/* Return the previous insn before INSN that is not a NOTE nor DEBUG_INSN.
+ This routine does not look inside SEQUENCEs. */
+
+rtx
+prev_nonnote_nondebug_insn (rtx insn)
+{
+ while (insn)
+ {
+ insn = PREV_INSN (insn);
+ if (insn == 0 || (!NOTE_P (insn) && !DEBUG_INSN_P (insn)))
+ break;
+ }
+
+ return insn;
+}
+
/* Return the next INSN, CALL_INSN or JUMP_INSN after INSN;
or 0, if there is none. This routine does not look inside
SEQUENCEs. */
if (!BARRIER_P (insn)
&& (bb = BLOCK_FOR_INSN (insn)))
{
- if (INSN_P (insn))
+ if (NONDEBUG_INSN_P (insn))
df_set_bb_dirty (bb);
if (BB_HEAD (bb) == insn)
{
void
reorder_insns_nobb (rtx from, rtx to, rtx after)
{
+#ifdef ENABLE_CHECKING
+ rtx x;
+ for (x = from; x != to; x = NEXT_INSN (x))
+ gcc_assert (after != x);
+ gcc_assert (after != to);
+#endif
+
/* Splice this bunch out of where it is now. */
if (PREV_INSN (from))
NEXT_INSN (PREV_INSN (from)) = NEXT_INSN (to);
regno_reg_rtx[VIRTUAL_STACK_DYNAMIC_REGNUM] = virtual_stack_dynamic_rtx;
regno_reg_rtx[VIRTUAL_OUTGOING_ARGS_REGNUM] = virtual_outgoing_args_rtx;
regno_reg_rtx[VIRTUAL_CFA_REGNUM] = virtual_cfa_rtx;
+ regno_reg_rtx[VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM]
+ = virtual_preferred_stack_boundary_rtx;
}
\f
/* Put copies of all the hard registers into regno_reg_rtx. */
memcpy (regno_reg_rtx,
- static_regno_reg_rtx,
+ initial_regno_reg_rtx,
FIRST_PSEUDO_REGISTER * sizeof (rtx));
/* Put copies of all the virtual register rtx into regno_reg_rtx. */
virtual_outgoing_args_rtx =
gen_raw_REG (Pmode, VIRTUAL_OUTGOING_ARGS_REGNUM);
virtual_cfa_rtx = gen_raw_REG (Pmode, VIRTUAL_CFA_REGNUM);
+ virtual_preferred_stack_boundary_rtx =
+ gen_raw_REG (Pmode, VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM);
/* Initialize RTL for commonly used hard registers. These are
copied into regno_reg_rtx as we begin to compile each function. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- static_regno_reg_rtx[i] = gen_raw_REG (reg_raw_mode[i], i);
+ initial_regno_reg_rtx[i] = gen_raw_REG (reg_raw_mode[i], i);
#ifdef RETURN_ADDRESS_POINTER_REGNUM
return_address_pointer_rtx
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