/* Data flow analysis for GNU compiler.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
are another pair, etc. */
rtx regs_may_share;
-/* Callback that determines if it's ok for a function to have no
- noreturn attribute. */
-int (*lang_missing_noreturn_ok_p) (tree);
-
/* Set of registers that may be eliminable. These are handled specially
in updating regs_ever_live. */
/* Flags controlling the set of information propagate_block collects. */
int flags;
+ /* Index of instruction being processed. */
+ int insn_num;
};
/* Number of dead insns removed. */
static int ndead;
+/* When PROP_REG_INFO set, array contains pbi->insn_num of instruction
+ where given register died. When the register is marked alive, we use the
+ information to compute amount of instructions life range cross.
+ (remember, we are walking backward). This can be computed as current
+ pbi->insn_num - reg_deaths[regno].
+ At the end of processing each basic block, the remaining live registers
+ are inspected and liferanges are increased same way so liverange of global
+ registers are computed correctly.
+
+ The array is maintained clear for dead registers, so it can be safely reused
+ for next basic block without expensive memset of the whole array after
+ reseting pbi->insn_num to 0. */
+
+static int *reg_deaths;
+
/* Maximum length of pbi->mem_set_list before we start dropping
new elements on the floor. */
#define MAX_MEM_SET_LIST_LEN 100
static void verify_wide_reg (int, basic_block);
static void verify_local_live_at_start (regset, basic_block);
static void notice_stack_pointer_modification_1 (rtx, rtx, void *);
-static void notice_stack_pointer_modification (rtx);
+static void notice_stack_pointer_modification (void);
static void mark_reg (rtx, void *);
static void mark_regs_live_at_end (regset);
static void calculate_global_regs_live (sbitmap, sbitmap, int);
static void clear_log_links (sbitmap);
static int count_or_remove_death_notes_bb (basic_block, int);
\f
-
-void
-check_function_return_warnings (void)
-{
- if (warn_missing_noreturn
- && !TREE_THIS_VOLATILE (cfun->decl)
- && EXIT_BLOCK_PTR->pred == NULL
- && (lang_missing_noreturn_ok_p
- && !lang_missing_noreturn_ok_p (cfun->decl)))
- warning ("function might be possible candidate for attribute `noreturn'");
-
- /* If we have a path to EXIT, then we do return. */
- if (TREE_THIS_VOLATILE (cfun->decl)
- && EXIT_BLOCK_PTR->pred != NULL)
- warning ("`noreturn' function does return");
-
- /* If the clobber_return_insn appears in some basic block, then we
- do reach the end without returning a value. */
- else if (warn_return_type
- && cfun->x_clobber_return_insn != NULL
- && EXIT_BLOCK_PTR->pred != NULL)
- {
- int max_uid = get_max_uid ();
-
- /* If clobber_return_insn was excised by jump1, then renumber_insns
- can make max_uid smaller than the number still recorded in our rtx.
- That's fine, since this is a quick way of verifying that the insn
- is no longer in the chain. */
- if (INSN_UID (cfun->x_clobber_return_insn) < max_uid)
- {
- rtx insn;
-
- for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
- if (insn == cfun->x_clobber_return_insn)
- {
- warning ("control reaches end of non-void function");
- break;
- }
- }
- }
-}
-\f
/* Return the INSN immediately following the NOTE_INSN_BASIC_BLOCK
note associated with the BLOCK. */
if (insn == NULL_RTX)
return NULL_RTX;
- if (GET_CODE (insn) == CODE_LABEL)
+ if (LABEL_P (insn))
insn = NEXT_INSN (insn);
if (!NOTE_INSN_BASIC_BLOCK_P (insn))
abort ();
return NEXT_INSN (insn);
}
\f
-/* Perform data flow analysis.
- F is the first insn of the function; FLAGS is a set of PROP_* flags
- to be used in accumulating flow info. */
+/* Perform data flow analysis for the whole control flow graph.
+ FLAGS is a set of PROP_* flags to be used in accumulating flow info. */
void
-life_analysis (rtx f, FILE *file, int flags)
+life_analysis (FILE *file, int flags)
{
#ifdef ELIMINABLE_REGS
int i;
/* Always remove no-op moves. Do this before other processing so
that we don't have to keep re-scanning them. */
- delete_noop_moves (f);
+ delete_noop_moves ();
/* Some targets can emit simpler epilogues if they know that sp was
not ever modified during the function. After reload, of course,
we've already emitted the epilogue so there's no sense searching. */
if (! reload_completed)
- notice_stack_pointer_modification (f);
+ notice_stack_pointer_modification ();
/* Allocate and zero out data structures that will record the
data from lifetime analysis. */
memset (regs_asm_clobbered, 0, sizeof (regs_asm_clobbered));
}
update_life_info (NULL, UPDATE_LIFE_GLOBAL, flags);
+ if (reg_deaths)
+ {
+ free (reg_deaths);
+ reg_deaths = NULL;
+ }
/* Clean up. */
if (optimize && (flags & PROP_SCAN_DEAD_STORES))
if (file)
dump_flow_info (file);
- free_basic_block_vars (1);
-
/* Removing dead insns should have made jumptables really dead. */
delete_dead_jumptables ();
}
rtx x = *px;
unsigned int regno = *(int *) pregno;
- if (GET_CODE (x) == REG && REGNO (x) == regno)
+ if (REG_P (x) && REGNO (x) == regno)
{
if (GET_MODE_BITSIZE (GET_MODE (x)) <= BITS_PER_WORD)
return 2;
head = NEXT_INSN (head);
}
- if (rtl_dump_file)
+ if (dump_file)
{
- fprintf (rtl_dump_file, "Register %d died unexpectedly.\n", regno);
- dump_bb (bb, rtl_dump_file);
+ fprintf (dump_file, "Register %d died unexpectedly.\n", regno);
+ dump_bb (bb, dump_file, 0);
}
abort ();
}
registers. The regsets should exactly match. */
if (! REG_SET_EQUAL_P (new_live_at_start, bb->global_live_at_start))
{
- if (rtl_dump_file)
+ if (dump_file)
{
- fprintf (rtl_dump_file,
+ fprintf (dump_file,
"live_at_start mismatch in bb %d, aborting\nNew:\n",
bb->index);
- debug_bitmap_file (rtl_dump_file, new_live_at_start);
- fputs ("Old:\n", rtl_dump_file);
- dump_bb (bb, rtl_dump_file);
+ debug_bitmap_file (dump_file, new_live_at_start);
+ fputs ("Old:\n", dump_file);
+ dump_bb (bb, dump_file, 0);
}
abort ();
}
/* No registers should die. */
if (REGNO_REG_SET_P (bb->global_live_at_start, i))
{
- if (rtl_dump_file)
+ if (dump_file)
{
- fprintf (rtl_dump_file,
+ fprintf (dump_file,
"Register %d died unexpectedly.\n", i);
- dump_bb (bb, rtl_dump_file);
+ dump_bb (bb, dump_file, 0);
}
abort ();
}
tmp = INITIALIZE_REG_SET (tmp_head);
ndead = 0;
+ if ((prop_flags & PROP_REG_INFO) && !reg_deaths)
+ reg_deaths = xcalloc (sizeof (*reg_deaths), max_regno);
+
timevar_push ((extent == UPDATE_LIFE_LOCAL || blocks)
? TV_LIFE_UPDATE : TV_LIFE);
/* Zap the life information from the last round. If we don't
do this, we can wind up with registers that no longer appear
- in the code being marked live at entry, which twiggs bogus
- warnings from regno_uninitialized. */
+ in the code being marked live at entry. */
FOR_EACH_BB (bb)
{
CLEAR_REG_SET (bb->global_live_at_start);
}
});
}
+ if (reg_deaths)
+ {
+ free (reg_deaths);
+ reg_deaths = NULL;
+ }
timevar_pop ((extent == UPDATE_LIFE_LOCAL || blocks)
? TV_LIFE_UPDATE : TV_LIFE);
- if (ndead && rtl_dump_file)
- fprintf (rtl_dump_file, "deleted %i dead insns\n", ndead);
+ if (ndead && dump_file)
+ fprintf (dump_file, "deleted %i dead insns\n", ndead);
return ndead;
}
return retval;
}
-/* Free the variables allocated by find_basic_blocks.
-
- KEEP_HEAD_END_P is nonzero if basic_block_info is not to be freed. */
+/* Free the variables allocated by find_basic_blocks. */
void
-free_basic_block_vars (int keep_head_end_p)
+free_basic_block_vars (void)
{
- if (! keep_head_end_p)
+ if (basic_block_info)
{
- if (basic_block_info)
- {
- clear_edges ();
- VARRAY_FREE (basic_block_info);
- }
- n_basic_blocks = 0;
- last_basic_block = 0;
-
- ENTRY_BLOCK_PTR->aux = NULL;
- ENTRY_BLOCK_PTR->global_live_at_end = NULL;
- EXIT_BLOCK_PTR->aux = NULL;
- EXIT_BLOCK_PTR->global_live_at_start = NULL;
+ clear_edges ();
+ basic_block_info = NULL;
}
+ n_basic_blocks = 0;
+ last_basic_block = 0;
+
+ ENTRY_BLOCK_PTR->aux = NULL;
+ ENTRY_BLOCK_PTR->global_live_at_end = NULL;
+ EXIT_BLOCK_PTR->aux = NULL;
+ EXIT_BLOCK_PTR->global_live_at_start = NULL;
}
/* Delete any insns that copy a register to itself. */
int
-delete_noop_moves (rtx f ATTRIBUTE_UNUSED)
+delete_noop_moves (void)
{
rtx insn, next;
basic_block bb;
}
}
}
- if (nnoops && rtl_dump_file)
- fprintf (rtl_dump_file, "deleted %i noop moves", nnoops);
+ if (nnoops && dump_file)
+ fprintf (dump_file, "deleted %i noop moves", nnoops);
return nnoops;
}
for (insn = get_insns (); insn; insn = next)
{
next = NEXT_INSN (insn);
- if (GET_CODE (insn) == CODE_LABEL
+ if (LABEL_P (insn)
&& LABEL_NUSES (insn) == LABEL_PRESERVE_P (insn)
- && GET_CODE (next) == JUMP_INSN
+ && JUMP_P (next)
&& (GET_CODE (PATTERN (next)) == ADDR_VEC
|| GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
{
- if (rtl_dump_file)
- fprintf (rtl_dump_file, "Dead jumptable %i removed\n", INSN_UID (insn));
+ if (dump_file)
+ fprintf (dump_file, "Dead jumptable %i removed\n", INSN_UID (insn));
delete_insn (NEXT_INSN (insn));
delete_insn (insn);
next = NEXT_INSN (next);
/* The stack pointer is only modified indirectly as the result
of a push until later in flow. See the comments in rtl.texi
regarding Embedded Side-Effects on Addresses. */
- || (GET_CODE (x) == MEM
- && GET_RTX_CLASS (GET_CODE (XEXP (x, 0))) == 'a'
+ || (MEM_P (x)
+ && GET_RTX_CLASS (GET_CODE (XEXP (x, 0))) == RTX_AUTOINC
&& XEXP (XEXP (x, 0), 0) == stack_pointer_rtx))
current_function_sp_is_unchanging = 0;
}
static void
-notice_stack_pointer_modification (rtx f)
+notice_stack_pointer_modification (void)
{
+ basic_block bb;
rtx insn;
/* Assume that the stack pointer is unchanging if alloca hasn't
if (! current_function_sp_is_unchanging)
return;
- for (insn = f; insn; insn = NEXT_INSN (insn))
- {
- if (INSN_P (insn))
- {
- /* Check if insn modifies the stack pointer. */
- note_stores (PATTERN (insn), notice_stack_pointer_modification_1,
- NULL);
- if (! current_function_sp_is_unchanging)
- return;
- }
- }
+ FOR_EACH_BB (bb)
+ FOR_BB_INSNS (bb, insn)
+ {
+ if (INSN_P (insn))
+ {
+ /* Check if insn modifies the stack pointer. */
+ note_stores (PATTERN (insn),
+ notice_stack_pointer_modification_1,
+ NULL);
+ if (! current_function_sp_is_unchanging)
+ return;
+ }
+ }
}
/* Mark a register in SET. Hard registers in large modes get all
SET_REGNO_REG_SET (set, regno);
if (regno < FIRST_PSEUDO_REGISTER)
{
- int n = HARD_REGNO_NREGS (regno, GET_MODE (reg));
+ int n = hard_regno_nregs[regno][GET_MODE (reg)];
while (--n > 0)
SET_REGNO_REG_SET (set, regno + n);
}
case ZERO_EXTRACT:
case SIGN_EXTRACT:
case STRICT_LOW_PART:
- if (GET_CODE (XEXP (*ptr, 0)) == REG && REGNO (XEXP (*ptr, 0)) == reg)
+ if (REG_P (XEXP (*ptr, 0)) && REGNO (XEXP (*ptr, 0)) == reg)
{
param->retval = XEXP (*ptr, 0);
return 1;
break;
case SUBREG:
- if (GET_CODE (SUBREG_REG (*ptr)) == REG
+ if (REG_P (SUBREG_REG (*ptr))
&& REGNO (SUBREG_REG (*ptr)) == reg)
{
param->retval = SUBREG_REG (*ptr);
int i;
max_regno = max_reg_num ();
+ if (reg_deaths)
+ abort ();
+ reg_deaths = xcalloc (sizeof (*reg_deaths), max_regno);
/* Recalculate the register space, in case it has grown. Old style
vector oriented regsets would set regset_{size,bytes} here also. */
real good way to fix up the reference to the deleted label
when the label is deleted, so we just allow it here. */
- if (inote && GET_CODE (inote) == CODE_LABEL)
+ if (inote && LABEL_P (inote))
{
rtx label = XEXP (inote, 0);
rtx next;
jump following it, but not the label itself. */
if (LABEL_NUSES (label) == 1 + LABEL_PRESERVE_P (label)
&& (next = next_nonnote_insn (label)) != NULL
- && GET_CODE (next) == JUMP_INSN
+ && JUMP_P (next)
&& (GET_CODE (PATTERN (next)) == ADDR_VEC
|| GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
{
/* Does this instruction increment or decrement a register? */
if ((flags & PROP_AUTOINC)
&& x != 0
- && GET_CODE (SET_DEST (x)) == REG
+ && REG_P (SET_DEST (x))
&& (GET_CODE (SET_SRC (x)) == PLUS
|| GET_CODE (SET_SRC (x)) == MINUS)
&& XEXP (SET_SRC (x), 0) == SET_DEST (x)
&& GET_CODE (SET_SRC (PATTERN (insn))) == PLUS
&& XEXP (SET_SRC (PATTERN (insn)), 0) == stack_pointer_rtx
&& GET_CODE (XEXP (SET_SRC (PATTERN (insn)), 1)) == CONST_INT)
- /* We have an insn to pop a constant amount off the stack.
- (Such insns use PLUS regardless of the direction of the stack,
- and any insn to adjust the stack by a constant is always a pop.)
- These insns, if not dead stores, have no effect on life, though
- they do have an effect on the memory stores we are tracking. */
- invalidate_mems_from_set (pbi, stack_pointer_rtx);
+ {
+ /* We have an insn to pop a constant amount off the stack.
+ (Such insns use PLUS regardless of the direction of the stack,
+ and any insn to adjust the stack by a constant is always a pop
+ or part of a push.)
+ These insns, if not dead stores, have no effect on life, though
+ they do have an effect on the memory stores we are tracking. */
+ invalidate_mems_from_set (pbi, stack_pointer_rtx);
+ /* Still, we need to update local_set, lest ifcvt.c:dead_or_predicable
+ concludes that the stack pointer is not modified. */
+ mark_set_regs (pbi, PATTERN (insn), insn);
+ }
else
{
rtx note;
in a register clobbered by calls. Find all regs now live and
record this for them. */
- if (GET_CODE (insn) == CALL_INSN && (flags & PROP_REG_INFO))
+ if (CALL_P (insn) && (flags & PROP_REG_INFO))
EXECUTE_IF_SET_IN_REG_SET (pbi->reg_live, 0, i,
{ REG_N_CALLS_CROSSED (i)++; });
would have killed the values if they hadn't been deleted. */
mark_set_regs (pbi, PATTERN (insn), insn);
- if (GET_CODE (insn) == CALL_INSN)
+ if (CALL_P (insn))
{
regset live_at_end;
bool sibcall_p;
current_function_return_rtx,
(rtx *) 0)))
{
+ enum rtx_code code = global_regs[i] ? SET : CLOBBER;
/* We do not want REG_UNUSED notes for these registers. */
- mark_set_1 (pbi, CLOBBER, regno_reg_rtx[i], cond, insn,
+ mark_set_1 (pbi, code, regno_reg_rtx[i], cond, insn,
pbi->flags & ~(PROP_DEATH_NOTES | PROP_REG_INFO));
}
}
prev = PREV_INSN (insn);
#endif
- if (! insn_is_dead && GET_CODE (insn) == CALL_INSN)
+ if (! insn_is_dead && CALL_P (insn))
{
int i;
rtx note, cond;
mark_used_regs (pbi, XEXP (XEXP (note, 0), 0), cond, insn);
/* The stack ptr is used (honorarily) by a CALL insn. */
+ if ((flags & PROP_REG_INFO)
+ && !REGNO_REG_SET_P (pbi->reg_live, STACK_POINTER_REGNUM))
+ reg_deaths[STACK_POINTER_REGNUM] = pbi->insn_num;
SET_REGNO_REG_SET (pbi->reg_live, STACK_POINTER_REGNUM);
/* Calls may also reference any of the global registers,
}
}
- /* On final pass, update counts of how many insns in which each reg
- is live. */
- if (flags & PROP_REG_INFO)
- EXECUTE_IF_SET_IN_REG_SET (pbi->reg_live, 0, i,
- { REG_LIVE_LENGTH (i)++; });
+ pbi->insn_num++;
return prev;
}
pbi->cond_local_set = cond_local_set;
pbi->cc0_live = 0;
pbi->flags = flags;
+ pbi->insn_num = 0;
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
pbi->reg_next_use = xcalloc (max_reg_num (), sizeof (rtx));
/* If this block ends in a conditional branch, for each register
live from one side of the branch and not the other, record the
register as conditionally dead. */
- if (GET_CODE (BB_END (bb)) == JUMP_INSN
+ if (JUMP_P (BB_END (bb))
&& any_condjump_p (BB_END (bb)))
{
regset_head diff_head;
in the form of a comparison of a register against zero.
If the condition is more complex than that, then it is safe
not to record any information. */
- if (GET_CODE (reg) == REG
+ if (REG_P (reg)
&& XEXP (cond_true, 1) == const0_rtx)
{
rtx cond_false
{
rtx insn, set;
for (insn = BB_END (bb); insn != BB_HEAD (bb); insn = PREV_INSN (insn))
- if (GET_CODE (insn) == INSN
+ if (NONJUMP_INSN_P (insn)
&& (set = single_set (insn))
- && GET_CODE (SET_DEST (set)) == MEM)
+ && MEM_P (SET_DEST (set)))
{
rtx mem = SET_DEST (set);
rtx canon_mem = canon_rtx (mem);
BITMAP_XFREE (pbi->reg_cond_reg);
#endif
+ if (pbi->flags & PROP_REG_INFO)
+ {
+ int num = pbi->insn_num;
+ int i;
+
+ EXECUTE_IF_SET_IN_REG_SET (pbi->reg_live, 0, i,
+ { REG_LIVE_LENGTH (i) += num - reg_deaths[i];
+ reg_deaths[i] = 0;
+ });
+ }
if (pbi->reg_next_use)
free (pbi->reg_next_use);
/* If this is a call to `setjmp' et al, warn if any
non-volatile datum is live. */
if ((flags & PROP_REG_INFO)
- && GET_CODE (insn) == CALL_INSN
+ && CALL_P (insn)
&& find_reg_note (insn, REG_SETJMP, NULL))
IOR_REG_SET (regs_live_at_setjmp, pbi->reg_live);
else if (volatile_refs_p (SET_SRC (x)))
return 0;
- if (GET_CODE (r) == MEM)
+ if (MEM_P (r))
{
rtx temp, canon_r;
|| GET_CODE (r) == ZERO_EXTRACT)
r = XEXP (r, 0);
- if (GET_CODE (r) == REG)
+ if (REG_P (r))
{
int regno = REGNO (r);
words are not needed. */
if (regno < FIRST_PSEUDO_REGISTER)
{
- int n = HARD_REGNO_NREGS (regno, GET_MODE (r));
+ int n = hard_regno_nregs[regno][GET_MODE (r)];
while (--n > 0)
if (REGNO_REG_SET_P (pbi->reg_live, regno+n))
}
/* A CLOBBER of a pseudo-register that is dead serves no purpose. That
- is not necessarily true for hard registers. */
- else if (code == CLOBBER && GET_CODE (XEXP (x, 0)) == REG
- && REGNO (XEXP (x, 0)) >= FIRST_PSEUDO_REGISTER
- && ! REGNO_REG_SET_P (pbi->reg_live, REGNO (XEXP (x, 0))))
- return 1;
-
- /* We do not check other CLOBBER or USE here. An insn consisting of just
- a CLOBBER or just a USE should not be deleted. */
+ is not necessarily true for hard registers until after reload. */
+ else if (code == CLOBBER)
+ {
+ if (REG_P (XEXP (x, 0))
+ && (REGNO (XEXP (x, 0)) >= FIRST_PSEUDO_REGISTER
+ || reload_completed)
+ && ! REGNO_REG_SET_P (pbi->reg_live, REGNO (XEXP (x, 0))))
+ return 1;
+ }
+
+ /* ??? A base USE is a historical relic. It ought not be needed anymore.
+ Instances where it is still used are either (1) temporary and the USE
+ escaped the pass, (2) cruft and the USE need not be emitted anymore,
+ or (3) hiding bugs elsewhere that are not properly representing data
+ flow. */
+
return 0;
}
{
rtx r = SET_SRC (x);
- if (GET_CODE (r) == REG)
+ if (REG_P (r))
{
rtx call = XEXP (note, 0);
rtx call_pat;
int i;
/* Find the call insn. */
- while (call != insn && GET_CODE (call) != CALL_INSN)
+ while (call != insn && !CALL_P (call))
call = NEXT_INSN (call);
/* If there is none, do nothing special,
return 1;
}
-/* Return 1 if register REGNO was used before it was set, i.e. if it is
- live at function entry. Don't count global register variables, variables
- in registers that can be used for function arg passing, or variables in
- fixed hard registers. */
-
-int
-regno_uninitialized (unsigned int regno)
-{
- if (n_basic_blocks == 0
- || (regno < FIRST_PSEUDO_REGISTER
- && (global_regs[regno]
- || fixed_regs[regno]
- || FUNCTION_ARG_REGNO_P (regno))))
- return 0;
-
- return REGNO_REG_SET_P (ENTRY_BLOCK_PTR->global_live_at_end, regno);
-}
-
/* 1 if register REGNO was alive at a place where `setjmp' was called
and was set more than once or is an argument.
Such regs may be clobbered by `longjmp'. */
rtx x = *px;
struct propagate_block_info *pbi = data;
- if (GET_RTX_CLASS (GET_CODE (x)) == 'a')
+ if (GET_RTX_CLASS (GET_CODE (x)) == RTX_AUTOINC)
{
invalidate_mems_from_set (pbi, XEXP (x, 0));
return -1;
|| GET_CODE (reg) == ZERO_EXTRACT
|| GET_CODE (reg) == SIGN_EXTRACT
|| GET_CODE (reg) == STRICT_LOW_PART);
- if (GET_CODE (reg) == MEM)
+ if (MEM_P (reg))
break;
not_dead = (unsigned long) REGNO_REG_SET_P (pbi->reg_live, REGNO (reg));
/* Fall through. */
case REG:
regno_last = regno_first = REGNO (reg);
if (regno_first < FIRST_PSEUDO_REGISTER)
- regno_last += HARD_REGNO_NREGS (regno_first, GET_MODE (reg)) - 1;
+ regno_last += hard_regno_nregs[regno_first][GET_MODE (reg)] - 1;
break;
case SUBREG:
- if (GET_CODE (SUBREG_REG (reg)) == REG)
+ if (REG_P (SUBREG_REG (reg)))
{
enum machine_mode outer_mode = GET_MODE (reg);
enum machine_mode inner_mode = GET_MODE (SUBREG_REG (reg));
SUBREG_BYTE (reg),
outer_mode);
regno_last = (regno_first
- + HARD_REGNO_NREGS (regno_first, outer_mode) - 1);
+ + hard_regno_nregs[regno_first][outer_mode] - 1);
/* Since we've just adjusted the register number ranges, make
sure REG matches. Otherwise some_was_live will be clear
If this set is a REG, then it kills any MEMs which use the reg. */
if (optimize && (flags & PROP_SCAN_DEAD_STORES))
{
- if (GET_CODE (reg) == REG)
+ if (REG_P (reg))
invalidate_mems_from_set (pbi, reg);
/* If the memory reference had embedded side effects (autoincrement
address modes. Then we may need to kill some entries on the
memory set list. */
- if (insn && GET_CODE (reg) == MEM)
+ if (insn && MEM_P (reg))
for_each_rtx (&PATTERN (insn), invalidate_mems_from_autoinc, pbi);
- if (GET_CODE (reg) == MEM && ! side_effects_p (reg)
+ if (MEM_P (reg) && ! side_effects_p (reg)
/* ??? With more effort we could track conditional memory life. */
&& ! cond)
add_to_mem_set_list (pbi, canon_rtx (reg));
}
- if (GET_CODE (reg) == REG
+ if (REG_P (reg)
&& ! (regno_first == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
in ASM_OPERANDs. If these registers get replaced,
we might wind up changing the semantics of the insn,
even if reload can make what appear to be valid
- assignments later. */
+ assignments later.
+
+ We don't build a LOG_LINK for global registers to
+ or from a function call. We don't want to let
+ combine think that it knows what is going on with
+ global registers. */
if (y && (BLOCK_NUM (y) == blocknum)
&& (regno_first >= FIRST_PSEUDO_REGISTER
- || asm_noperands (PATTERN (y)) < 0))
+ || (asm_noperands (PATTERN (y)) < 0
+ && ! ((CALL_P (insn)
+ || CALL_P (y))
+ && global_regs[regno_first]))))
LOG_LINKS (y) = alloc_INSN_LIST (insn, LOG_LINKS (y));
}
}
{
for (i = regno_first; i <= regno_last; ++i)
if (!(not_dead & (((unsigned long) 1) << (i - regno_first))))
- CLEAR_REGNO_REG_SET (pbi->reg_live, i);
+ {
+ if ((pbi->flags & PROP_REG_INFO)
+ && REGNO_REG_SET_P (pbi->reg_live, i))
+ {
+ REG_LIVE_LENGTH (i) += pbi->insn_num - reg_deaths[i];
+ reg_deaths[i] = 0;
+ }
+ CLEAR_REGNO_REG_SET (pbi->reg_live, i);
+ }
}
}
- else if (GET_CODE (reg) == REG)
+ else if (REG_P (reg))
{
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
pbi->reg_next_use[regno_first] = 0;
{
rtx op0, op1;
- if (GET_RTX_CLASS (GET_CODE (old)) == '<')
+ if (COMPARISON_P (old))
{
- if (GET_RTX_CLASS (GET_CODE (x)) == '<'
+ if (COMPARISON_P (x)
&& REVERSE_CONDEXEC_PREDICATES_P (GET_CODE (x), GET_CODE (old))
&& REGNO (XEXP (x, 0)) == REGNO (XEXP (old, 0)))
return const1_rtx;
x_code = GET_CODE (x);
if (x_code == NOT)
return XEXP (x, 0);
- if (GET_RTX_CLASS (x_code) == '<'
- && GET_CODE (XEXP (x, 0)) == REG)
+ if (COMPARISON_P (x)
+ && REG_P (XEXP (x, 0)))
{
if (XEXP (x, 1) != const0_rtx)
abort ();
{
rtx op0, op1;
- if (GET_RTX_CLASS (GET_CODE (old)) == '<')
+ if (COMPARISON_P (old))
{
- if (GET_RTX_CLASS (GET_CODE (x)) == '<'
+ if (COMPARISON_P (x)
&& GET_CODE (x) == reverse_condition (GET_CODE (old))
&& REGNO (XEXP (x, 0)) == REGNO (XEXP (old, 0)))
return const0_rtx;
{
rtx op0, op1;
- if (GET_RTX_CLASS (GET_CODE (x)) == '<')
+ if (COMPARISON_P (x))
{
if (REGNO (XEXP (x, 0)) == regno)
return const0_rtx;
if (! validate_change (insn, &XEXP (mem, 0), inc, 0))
return;
}
- else if (GET_CODE (q) == REG
+ else if (REG_P (q)
/* PREV_INSN used here to check the semi-open interval
[insn,incr). */
&& ! reg_used_between_p (q, PREV_INSN (insn), incr)
use of INCR_REG. If a use of INCR_REG was just placed in
the insn before INSN, make that the next use.
Otherwise, invalidate it. */
- if (GET_CODE (PREV_INSN (insn)) == INSN
+ if (NONJUMP_INSN_P (PREV_INSN (insn))
&& GET_CODE (PATTERN (PREV_INSN (insn))) == SET
&& SET_SRC (PATTERN (PREV_INSN (insn))) == incr_reg)
pbi->reg_next_use[regno] = PREV_INSN (insn);
incr_reg = q;
regno = REGNO (q);
+ if ((pbi->flags & PROP_REG_INFO)
+ && !REGNO_REG_SET_P (pbi->reg_live, regno))
+ reg_deaths[regno] = pbi->insn_num;
+
/* REGNO is now used in INCR which is below INSN, but
it previously wasn't live here. If we don't mark
it as live, we'll put a REG_DEAD note for it
/* If there are any calls between INSN and INCR, show
that REGNO now crosses them. */
for (temp = insn; temp != incr; temp = NEXT_INSN (temp))
- if (GET_CODE (temp) == CALL_INSN)
+ if (CALL_P (temp))
REG_N_CALLS_CROSSED (regno)++;
/* Invalidate alias info for Q since we just changed its value. */
{
remove_note (incr, note);
if (XEXP (note, 0) != incr_reg)
- CLEAR_REGNO_REG_SET (pbi->reg_live, REGNO (XEXP (note, 0)));
+ {
+ unsigned int regno = REGNO (XEXP (note, 0));
+
+ if ((pbi->flags & PROP_REG_INFO)
+ && REGNO_REG_SET_P (pbi->reg_live, regno))
+ {
+ REG_LIVE_LENGTH (regno) += pbi->insn_num - reg_deaths[regno];
+ reg_deaths[regno] = 0;
+ }
+ CLEAR_REGNO_REG_SET (pbi->reg_live, REGNO (XEXP (note, 0)));
+ }
}
- PUT_CODE (incr, NOTE);
- NOTE_LINE_NUMBER (incr) = NOTE_INSN_DELETED;
- NOTE_SOURCE_FILE (incr) = 0;
+ SET_INSN_DELETED (incr);
}
if (regno >= FIRST_PSEUDO_REGISTER)
int regno;
int size = GET_MODE_SIZE (GET_MODE (x));
- if (GET_CODE (insn) == JUMP_INSN)
+ if (JUMP_P (insn))
return;
/* Here we detect use of an index register which might be good for
if (GET_CODE (addr) == PLUS && GET_CODE (XEXP (addr, 1)) == CONST_INT)
offset = INTVAL (XEXP (addr, 1)), addr = XEXP (addr, 0);
- if (GET_CODE (addr) != REG)
+ if (!REG_P (addr))
return;
regno = REGNO (addr);
inc_val)),
insn, x, incr, addr);
}
- else if (GET_CODE (inc_val) == REG
+ else if (REG_P (inc_val)
&& ! reg_set_between_p (inc_val, PREV_INSN (insn),
NEXT_INSN (incr)))
regno_last = regno_first = REGNO (reg);
if (regno_first < FIRST_PSEUDO_REGISTER)
- regno_last += HARD_REGNO_NREGS (regno_first, GET_MODE (reg)) - 1;
+ regno_last += hard_regno_nregs[regno_first][GET_MODE (reg)] - 1;
/* Find out if any of this register is live after this instruction. */
some_was_live = some_was_dead = 0;
REG_FREQ (regno_first) += REG_FREQ_FROM_BB (pbi->bb);
REG_N_REFS (regno_first)++;
}
+ for (i = regno_first; i <= regno_last; ++i)
+ if (! REGNO_REG_SET_P (pbi->reg_live, i))
+ {
+#ifdef ENABLE_CHECKING
+ if (reg_deaths[i])
+ abort ();
+#endif
+ reg_deaths[i] = pbi->insn_num;
+ }
}
/* Record and count the insns in which a reg dies. If it is used in
case CLOBBER:
/* If we are clobbering a MEM, mark any registers inside the address
as being used. */
- if (GET_CODE (XEXP (x, 0)) == MEM)
+ if (MEM_P (XEXP (x, 0)))
mark_used_regs (pbi, XEXP (XEXP (x, 0), 0), cond, insn);
return;
case SUBREG:
#ifdef CANNOT_CHANGE_MODE_CLASS
if ((flags & PROP_REG_INFO)
- && GET_CODE (SUBREG_REG (x)) == REG
+ && REG_P (SUBREG_REG (x))
&& REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER)
bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (x))
* MAX_MACHINE_MODE
/* While we're here, optimize this case. */
x = SUBREG_REG (x);
- if (GET_CODE (x) != REG)
+ if (!REG_P (x))
goto retry;
/* Fall through. */
/* If storing into MEM, don't show it as being used. But do
show the address as being used. */
- if (GET_CODE (testreg) == MEM)
+ if (MEM_P (testreg))
{
#ifdef AUTO_INC_DEC
if (flags & PROP_AUTOINC)
#ifdef CANNOT_CHANGE_MODE_CLASS
if ((flags & PROP_REG_INFO)
&& GET_CODE (testreg) == SUBREG
- && GET_CODE (SUBREG_REG (testreg)) == REG
+ && REG_P (SUBREG_REG (testreg))
&& REGNO (SUBREG_REG (testreg)) >= FIRST_PSEUDO_REGISTER)
bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (testreg))
* MAX_MACHINE_MODE
if ((GET_CODE (testreg) == PARALLEL
&& GET_MODE (testreg) == BLKmode)
- || (GET_CODE (testreg) == REG
+ || (REG_P (testreg)
&& (regno = REGNO (testreg),
! (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed)))
because if the incremented register is spilled and must be reloaded
there would be no way to store the incremented value back in memory. */
- if (GET_CODE (insn) == JUMP_INSN)
+ if (JUMP_P (insn))
return 0;
use = 0;
recompute_reg_usage (rtx f ATTRIBUTE_UNUSED, int loop_step ATTRIBUTE_UNUSED)
{
allocate_reg_life_data ();
- update_life_info (NULL, UPDATE_LIFE_LOCAL, PROP_REG_INFO);
+ /* distribute_notes in combiner fails to convert some of the REG_UNUSED notes
+ to REG_DEAD notes. This causes CHECK_DEAD_NOTES in sched1 to abort. To
+ solve this update the DEATH_NOTES here. */
+ update_life_info (NULL, UPDATE_LIFE_LOCAL, PROP_REG_INFO | PROP_DEATH_NOTES);
}
/* Optionally removes all the REG_DEAD and REG_UNUSED notes from a set of
int i;
basic_block bb;
-
/* This used to be a loop over all the blocks with a membership test
inside the loop. That can be amazingly expensive on a large CFG
when only a small number of bits are set in BLOCKs (for example,
switch (REG_NOTE_KIND (link))
{
case REG_DEAD:
- if (GET_CODE (XEXP (link, 0)) == REG)
+ if (REG_P (XEXP (link, 0)))
{
rtx reg = XEXP (link, 0);
int n;
if (REGNO (reg) >= FIRST_PSEUDO_REGISTER)
n = 1;
else
- n = HARD_REGNO_NREGS (REGNO (reg), GET_MODE (reg));
+ n = hard_regno_nregs[REGNO (reg)][GET_MODE (reg)];
count += n;
}
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