/* Optimize jump instructions, for GNU compiler.
- Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
- 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2014 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* This is the pathetic reminder of old fame of the jump-optimization pass
of the compiler. Now it contains basically a set of utility functions to
JUMP_LABEL internal field. With this we can detect labels that
become unused because of the deletion of all the jumps that
formerly used them. The JUMP_LABEL info is sometimes looked
- at by later passes.
+ at by later passes. For return insns, it contains either a
+ RETURN or a SIMPLE_RETURN rtx.
The subroutines redirect_jump and invert_jump are used
from other passes as well. */
#include "insn-config.h"
#include "insn-attr.h"
#include "recog.h"
+#include "hashtab.h"
+#include "hash-set.h"
+#include "vec.h"
+#include "machmode.h"
+#include "input.h"
#include "function.h"
+#include "predict.h"
+#include "dominance.h"
+#include "cfg.h"
+#include "cfgrtl.h"
+#include "basic-block.h"
#include "expr.h"
-#include "real.h"
#include "except.h"
-#include "diagnostic.h"
-#include "toplev.h"
+#include "diagnostic-core.h"
#include "reload.h"
-#include "predict.h"
-#include "timevar.h"
#include "tree-pass.h"
#include "target.h"
+#include "rtl-iter.h"
/* Optimize jump y; x: ... y: jumpif... x?
Don't know if it is worth bothering with. */
or even change what is live at any point.
So perhaps let combiner do it. */
-static void init_label_info (rtx);
-static void mark_all_labels (rtx);
+static void init_label_info (rtx_insn *);
+static void mark_all_labels (rtx_insn *);
+static void mark_jump_label_1 (rtx, rtx_insn *, bool, bool);
+static void mark_jump_label_asm (rtx, rtx_insn *);
static void redirect_exp_1 (rtx *, rtx, rtx, rtx);
static int invert_exp_1 (rtx, rtx);
-static int returnjump_p_1 (rtx *, void *);
\f
-/* Alternate entry into the jump optimizer. This entry point only rebuilds
- the JUMP_LABEL field in jumping insns and REG_LABEL notes in non-jumping
- instructions. */
-void
-rebuild_jump_labels (rtx f)
+/* Worker for rebuild_jump_labels and rebuild_jump_labels_chain. */
+static void
+rebuild_jump_labels_1 (rtx_insn *f, bool count_forced)
{
- rtx insn;
+ rtx_insn_list *insn;
timevar_push (TV_REBUILD_JUMP);
init_label_info (f);
closely enough to delete them here, so make sure their reference
count doesn't drop to zero. */
- for (insn = forced_labels; insn; insn = XEXP (insn, 1))
- if (LABEL_P (XEXP (insn, 0)))
- LABEL_NUSES (XEXP (insn, 0))++;
+ if (count_forced)
+ for (insn = forced_labels; insn; insn = insn->next ())
+ if (LABEL_P (insn->insn ()))
+ LABEL_NUSES (insn->insn ())++;
timevar_pop (TV_REBUILD_JUMP);
}
+
+/* This function rebuilds the JUMP_LABEL field and REG_LABEL_TARGET
+ notes in jumping insns and REG_LABEL_OPERAND notes in non-jumping
+ instructions and jumping insns that have labels as operands
+ (e.g. cbranchsi4). */
+void
+rebuild_jump_labels (rtx_insn *f)
+{
+ rebuild_jump_labels_1 (f, true);
+}
+
+/* This function is like rebuild_jump_labels, but doesn't run over
+ forced_labels. It can be used on insn chains that aren't the
+ main function chain. */
+void
+rebuild_jump_labels_chain (rtx_insn *chain)
+{
+ rebuild_jump_labels_1 (chain, false);
+}
\f
/* Some old code expects exactly one BARRIER as the NEXT_INSN of a
non-fallthru insn. This is not generally true, as multiple barriers
This simple pass moves barriers and removes duplicates so that the
old code is happy.
*/
-unsigned int
+static unsigned int
cleanup_barriers (void)
{
- rtx insn, next, prev;
- for (insn = get_insns (); insn; insn = next)
+ rtx_insn *insn;
+ for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
{
- next = NEXT_INSN (insn);
if (BARRIER_P (insn))
{
- prev = prev_nonnote_insn (insn);
+ rtx_insn *prev = prev_nonnote_insn (insn);
+ if (!prev)
+ continue;
+
+ if (CALL_P (prev))
+ {
+ /* Make sure we do not split a call and its corresponding
+ CALL_ARG_LOCATION note. */
+ rtx_insn *next = NEXT_INSN (prev);
+
+ if (NOTE_P (next)
+ && NOTE_KIND (next) == NOTE_INSN_CALL_ARG_LOCATION)
+ prev = next;
+ }
+
if (BARRIER_P (prev))
delete_insn (insn);
else if (prev != PREV_INSN (insn))
- reorder_insns (insn, insn, prev);
+ reorder_insns_nobb (insn, insn, prev);
}
}
return 0;
}
-struct tree_opt_pass pass_cleanup_barriers =
+namespace {
+
+const pass_data pass_data_cleanup_barriers =
{
- "barriers", /* name */
- NULL, /* gate */
- cleanup_barriers, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- 0, /* tv_id */
- 0, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 0 /* letter */
+ RTL_PASS, /* type */
+ "barriers", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_NONE, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
};
-\f
-/* Initialize LABEL_NUSES and JUMP_LABEL fields. Delete any REG_LABEL
- notes whose labels don't occur in the insn any more. Returns the
- largest INSN_UID found. */
-static void
-init_label_info (rtx f)
+class pass_cleanup_barriers : public rtl_opt_pass
{
- rtx insn;
+public:
+ pass_cleanup_barriers (gcc::context *ctxt)
+ : rtl_opt_pass (pass_data_cleanup_barriers, ctxt)
+ {}
- for (insn = f; insn; insn = NEXT_INSN (insn))
- if (LABEL_P (insn))
- LABEL_NUSES (insn) = (LABEL_PRESERVE_P (insn) != 0);
- else if (JUMP_P (insn))
- JUMP_LABEL (insn) = 0;
- else if (NONJUMP_INSN_P (insn) || CALL_P (insn))
- {
- rtx note, next;
+ /* opt_pass methods: */
+ virtual unsigned int execute (function *) { return cleanup_barriers (); }
- for (note = REG_NOTES (insn); note; note = next)
- {
- next = XEXP (note, 1);
- if (REG_NOTE_KIND (note) == REG_LABEL
- && ! reg_mentioned_p (XEXP (note, 0), PATTERN (insn)))
- remove_note (insn, note);
- }
- }
+}; // class pass_cleanup_barriers
+
+} // anon namespace
+
+rtl_opt_pass *
+make_pass_cleanup_barriers (gcc::context *ctxt)
+{
+ return new pass_cleanup_barriers (ctxt);
}
-/* Mark the label each jump jumps to.
- Combine consecutive labels, and count uses of labels. */
+\f
+/* Initialize LABEL_NUSES and JUMP_LABEL fields, add REG_LABEL_TARGET
+ for remaining targets for JUMP_P. Delete any REG_LABEL_OPERAND
+ notes whose labels don't occur in the insn any more. */
static void
-mark_all_labels (rtx f)
+init_label_info (rtx_insn *f)
{
- rtx insn;
+ rtx_insn *insn;
for (insn = f; insn; insn = NEXT_INSN (insn))
- if (INSN_P (insn))
- {
- mark_jump_label (PATTERN (insn), insn, 0);
- if (! INSN_DELETED_P (insn) && JUMP_P (insn))
- {
- /* When we know the LABEL_REF contained in a REG used in
- an indirect jump, we'll have a REG_LABEL note so that
- flow can tell where it's going. */
- if (JUMP_LABEL (insn) == 0)
- {
- rtx label_note = find_reg_note (insn, REG_LABEL, NULL_RTX);
- if (label_note)
- {
- /* But a LABEL_REF around the REG_LABEL note, so
- that we can canonicalize it. */
- rtx label_ref = gen_rtx_LABEL_REF (Pmode,
- XEXP (label_note, 0));
-
- mark_jump_label (label_ref, insn, 0);
- XEXP (label_note, 0) = XEXP (label_ref, 0);
- JUMP_LABEL (insn) = XEXP (label_note, 0);
- }
- }
- }
- }
-
- /* If we are in cfglayout mode, there may be non-insns between the
- basic blocks. If those non-insns represent tablejump data, they
- contain label references that we must record. */
- if (current_ir_type () == IR_RTL_CFGLAYOUT)
{
- basic_block bb;
- rtx insn;
- FOR_EACH_BB (bb)
+ if (LABEL_P (insn))
+ LABEL_NUSES (insn) = (LABEL_PRESERVE_P (insn) != 0);
+
+ /* REG_LABEL_TARGET notes (including the JUMP_LABEL field) are
+ sticky and not reset here; that way we won't lose association
+ with a label when e.g. the source for a target register
+ disappears out of reach for targets that may use jump-target
+ registers. Jump transformations are supposed to transform
+ any REG_LABEL_TARGET notes. The target label reference in a
+ branch may disappear from the branch (and from the
+ instruction before it) for other reasons, like register
+ allocation. */
+
+ if (INSN_P (insn))
{
- for (insn = bb->il.rtl->header; insn; insn = NEXT_INSN (insn))
- if (INSN_P (insn))
- {
- gcc_assert (JUMP_TABLE_DATA_P (insn));
- mark_jump_label (PATTERN (insn), insn, 0);
- }
+ rtx note, next;
- for (insn = bb->il.rtl->footer; insn; insn = NEXT_INSN (insn))
- if (INSN_P (insn))
- {
- gcc_assert (JUMP_TABLE_DATA_P (insn));
- mark_jump_label (PATTERN (insn), insn, 0);
- }
+ for (note = REG_NOTES (insn); note; note = next)
+ {
+ next = XEXP (note, 1);
+ if (REG_NOTE_KIND (note) == REG_LABEL_OPERAND
+ && ! reg_mentioned_p (XEXP (note, 0), PATTERN (insn)))
+ remove_note (insn, note);
+ }
}
}
}
-\f
-/* Move all block-beg, block-end and loop-beg notes between START and END out
- before START. START and END may be such notes. Returns the values of the
- new starting and ending insns, which may be different if the original ones
- were such notes. Return true if there were only such notes and no real
- instructions. */
-bool
-squeeze_notes (rtx* startp, rtx* endp)
+/* A subroutine of mark_all_labels. Trivially propagate a simple label
+ load into a jump_insn that uses it. */
+
+static void
+maybe_propagate_label_ref (rtx_insn *jump_insn, rtx_insn *prev_nonjump_insn)
{
- rtx start = *startp;
- rtx end = *endp;
+ rtx label_note, pc, pc_src;
+
+ pc = pc_set (jump_insn);
+ pc_src = pc != NULL ? SET_SRC (pc) : NULL;
+ label_note = find_reg_note (prev_nonjump_insn, REG_LABEL_OPERAND, NULL);
+
+ /* If the previous non-jump insn sets something to a label,
+ something that this jump insn uses, make that label the primary
+ target of this insn if we don't yet have any. That previous
+ insn must be a single_set and not refer to more than one label.
+ The jump insn must not refer to other labels as jump targets
+ and must be a plain (set (pc) ...), maybe in a parallel, and
+ may refer to the item being set only directly or as one of the
+ arms in an IF_THEN_ELSE. */
+
+ if (label_note != NULL && pc_src != NULL)
+ {
+ rtx label_set = single_set (prev_nonjump_insn);
+ rtx label_dest = label_set != NULL ? SET_DEST (label_set) : NULL;
+
+ if (label_set != NULL
+ /* The source must be the direct LABEL_REF, not a
+ PLUS, UNSPEC, IF_THEN_ELSE etc. */
+ && GET_CODE (SET_SRC (label_set)) == LABEL_REF
+ && (rtx_equal_p (label_dest, pc_src)
+ || (GET_CODE (pc_src) == IF_THEN_ELSE
+ && (rtx_equal_p (label_dest, XEXP (pc_src, 1))
+ || rtx_equal_p (label_dest, XEXP (pc_src, 2))))))
+ {
+ /* The CODE_LABEL referred to in the note must be the
+ CODE_LABEL in the LABEL_REF of the "set". We can
+ conveniently use it for the marker function, which
+ requires a LABEL_REF wrapping. */
+ gcc_assert (XEXP (label_note, 0) == LABEL_REF_LABEL (SET_SRC (label_set)));
+
+ mark_jump_label_1 (label_set, jump_insn, false, true);
- rtx insn;
- rtx next;
- rtx last = NULL;
- rtx past_end = NEXT_INSN (end);
+ gcc_assert (JUMP_LABEL (jump_insn) == XEXP (label_note, 0));
+ }
+ }
+}
+
+/* Mark the label each jump jumps to.
+ Combine consecutive labels, and count uses of labels. */
- for (insn = start; insn != past_end; insn = next)
+static void
+mark_all_labels (rtx_insn *f)
+{
+ rtx_insn *insn;
+
+ if (current_ir_type () == IR_RTL_CFGLAYOUT)
{
- next = NEXT_INSN (insn);
- if (NOTE_P (insn)
- && (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_END
- || NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_BEG))
+ basic_block bb;
+ FOR_EACH_BB_FN (bb, cfun)
{
- /* BLOCK_BEG or BLOCK_END notes only exist in the `final' pass. */
- gcc_assert (NOTE_LINE_NUMBER (insn) != NOTE_INSN_BLOCK_BEG
- && NOTE_LINE_NUMBER (insn) != NOTE_INSN_BLOCK_END);
+ /* In cfglayout mode, we don't bother with trivial next-insn
+ propagation of LABEL_REFs into JUMP_LABEL. This will be
+ handled by other optimizers using better algorithms. */
+ FOR_BB_INSNS (bb, insn)
+ {
+ gcc_assert (! insn->deleted ());
+ if (NONDEBUG_INSN_P (insn))
+ mark_jump_label (PATTERN (insn), insn, 0);
+ }
- if (insn == start)
- start = next;
- else
+ /* In cfglayout mode, there may be non-insns between the
+ basic blocks. If those non-insns represent tablejump data,
+ they contain label references that we must record. */
+ for (insn = BB_HEADER (bb); insn; insn = NEXT_INSN (insn))
+ if (JUMP_TABLE_DATA_P (insn))
+ mark_jump_label (PATTERN (insn), insn, 0);
+ for (insn = BB_FOOTER (bb); insn; insn = NEXT_INSN (insn))
+ if (JUMP_TABLE_DATA_P (insn))
+ mark_jump_label (PATTERN (insn), insn, 0);
+ }
+ }
+ else
+ {
+ rtx_insn *prev_nonjump_insn = NULL;
+ for (insn = f; insn; insn = NEXT_INSN (insn))
+ {
+ if (insn->deleted ())
+ ;
+ else if (LABEL_P (insn))
+ prev_nonjump_insn = NULL;
+ else if (JUMP_TABLE_DATA_P (insn))
+ mark_jump_label (PATTERN (insn), insn, 0);
+ else if (NONDEBUG_INSN_P (insn))
{
- rtx prev = PREV_INSN (insn);
- PREV_INSN (insn) = PREV_INSN (start);
- NEXT_INSN (insn) = start;
- NEXT_INSN (PREV_INSN (insn)) = insn;
- PREV_INSN (NEXT_INSN (insn)) = insn;
- NEXT_INSN (prev) = next;
- PREV_INSN (next) = prev;
+ mark_jump_label (PATTERN (insn), insn, 0);
+ if (JUMP_P (insn))
+ {
+ if (JUMP_LABEL (insn) == NULL && prev_nonjump_insn != NULL)
+ maybe_propagate_label_ref (insn, prev_nonjump_insn);
+ }
+ else
+ prev_nonjump_insn = insn;
}
}
- else
- last = insn;
}
-
- /* There were no real instructions. */
- if (start == past_end)
- return true;
-
- end = last;
-
- *startp = start;
- *endp = end;
- return false;
}
\f
/* Given a comparison (CODE ARG0 ARG1), inside an insn, INSN, return a code
description should define REVERSIBLE_CC_MODE and REVERSE_CONDITION macros
to help this function avoid overhead in these cases. */
enum rtx_code
-reversed_comparison_code_parts (enum rtx_code code, rtx arg0, rtx arg1, rtx insn)
+reversed_comparison_code_parts (enum rtx_code code, const_rtx arg0,
+ const_rtx arg1, const_rtx insn)
{
- enum machine_mode mode;
+ machine_mode mode;
/* If this is not actually a comparison, we can't reverse it. */
if (GET_RTX_CLASS (code) != RTX_COMPARE
{
#ifdef REVERSE_CONDITION
return REVERSE_CONDITION (code, mode);
-#endif
+#else
return reverse_condition (code);
+#endif
}
/* Try a few special cases based on the comparison code. */
if (GET_MODE_CLASS (mode) == MODE_CC || CC0_P (arg0))
{
- rtx prev;
+ const_rtx prev;
/* Try to search for the comparison to determine the real mode.
This code is expensive, but with sane machine description it
will be never used, since REVERSIBLE_CC_MODE will return true
if (! insn)
return UNKNOWN;
- for (prev = prev_nonnote_insn (insn);
+ /* These CONST_CAST's are okay because prev_nonnote_insn just
+ returns its argument and we assign it to a const_rtx
+ variable. */
+ for (prev = prev_nonnote_insn (CONST_CAST_RTX (insn));
prev != 0 && !LABEL_P (prev);
- prev = prev_nonnote_insn (prev))
+ prev = prev_nonnote_insn (CONST_CAST_RTX (prev)))
{
- rtx set = set_of (arg0, prev);
+ const_rtx set = set_of (arg0, prev);
if (set && GET_CODE (set) == SET
&& rtx_equal_p (SET_DEST (set), arg0))
{
/* Test for an integer condition, or a floating-point comparison
in which NaNs can be ignored. */
- if (GET_CODE (arg0) == CONST_INT
+ if (CONST_INT_P (arg0)
|| (GET_MODE (arg0) != VOIDmode
&& GET_MODE_CLASS (mode) != MODE_CC
&& !HONOR_NANS (mode)))
/* A wrapper around the previous function to take COMPARISON as rtx
expression. This simplifies many callers. */
enum rtx_code
-reversed_comparison_code (rtx comparison, rtx insn)
+reversed_comparison_code (const_rtx comparison, const_rtx insn)
{
if (!COMPARISON_P (comparison))
return UNKNOWN;
/* Return comparison with reversed code of EXP.
Return NULL_RTX in case we fail to do the reversal. */
rtx
-reversed_comparison (rtx exp, enum machine_mode mode)
+reversed_comparison (const_rtx exp, machine_mode mode)
{
enum rtx_code reversed_code = reversed_comparison_code (exp, NULL_RTX);
if (reversed_code == UNKNOWN)
/* Return 1 if INSN is an unconditional jump and nothing else. */
int
-simplejump_p (rtx insn)
+simplejump_p (const rtx_insn *insn)
{
return (JUMP_P (insn)
&& GET_CODE (PATTERN (insn)) == SET
branch and compare insns. Use any_condjump_p instead whenever possible. */
int
-condjump_p (rtx insn)
+condjump_p (const rtx_insn *insn)
{
- rtx x = PATTERN (insn);
+ const_rtx x = PATTERN (insn);
if (GET_CODE (x) != SET
|| GET_CODE (SET_DEST (x)) != PC)
return (GET_CODE (x) == IF_THEN_ELSE
&& ((GET_CODE (XEXP (x, 2)) == PC
&& (GET_CODE (XEXP (x, 1)) == LABEL_REF
- || GET_CODE (XEXP (x, 1)) == RETURN))
+ || ANY_RETURN_P (XEXP (x, 1))))
|| (GET_CODE (XEXP (x, 1)) == PC
&& (GET_CODE (XEXP (x, 2)) == LABEL_REF
- || GET_CODE (XEXP (x, 2)) == RETURN))));
+ || ANY_RETURN_P (XEXP (x, 2))))));
}
/* Return nonzero if INSN is a (possibly) conditional jump inside a
branch and compare insns. Use any_condjump_p instead whenever possible. */
int
-condjump_in_parallel_p (rtx insn)
+condjump_in_parallel_p (const rtx_insn *insn)
{
- rtx x = PATTERN (insn);
+ const_rtx x = PATTERN (insn);
if (GET_CODE (x) != PARALLEL)
return 0;
return 0;
if (XEXP (SET_SRC (x), 2) == pc_rtx
&& (GET_CODE (XEXP (SET_SRC (x), 1)) == LABEL_REF
- || GET_CODE (XEXP (SET_SRC (x), 1)) == RETURN))
+ || ANY_RETURN_P (XEXP (SET_SRC (x), 1))))
return 1;
if (XEXP (SET_SRC (x), 1) == pc_rtx
&& (GET_CODE (XEXP (SET_SRC (x), 2)) == LABEL_REF
- || GET_CODE (XEXP (SET_SRC (x), 2)) == RETURN))
+ || ANY_RETURN_P (XEXP (SET_SRC (x), 2))))
return 1;
return 0;
}
/* Return set of PC, otherwise NULL. */
rtx
-pc_set (rtx insn)
+pc_set (const rtx_insn *insn)
{
rtx pat;
if (!JUMP_P (insn))
possibly bundled inside a PARALLEL. */
int
-any_uncondjump_p (rtx insn)
+any_uncondjump_p (const rtx_insn *insn)
{
- rtx x = pc_set (insn);
+ const_rtx x = pc_set (insn);
if (!x)
return 0;
if (GET_CODE (SET_SRC (x)) != LABEL_REF)
Note that unlike condjump_p it returns false for unconditional jumps. */
int
-any_condjump_p (rtx insn)
+any_condjump_p (const rtx_insn *insn)
{
- rtx x = pc_set (insn);
+ const_rtx x = pc_set (insn);
enum rtx_code a, b;
if (!x)
a = GET_CODE (XEXP (SET_SRC (x), 1));
b = GET_CODE (XEXP (SET_SRC (x), 2));
- return ((b == PC && (a == LABEL_REF || a == RETURN))
- || (a == PC && (b == LABEL_REF || b == RETURN)));
+ return ((b == PC && (a == LABEL_REF || a == RETURN || a == SIMPLE_RETURN))
+ || (a == PC
+ && (b == LABEL_REF || b == RETURN || b == SIMPLE_RETURN)));
}
/* Return the label of a conditional jump. */
rtx
-condjump_label (rtx insn)
+condjump_label (const rtx_insn *insn)
{
rtx x = pc_set (insn);
return NULL_RTX;
}
-/* Return true if INSN is a (possibly conditional) return insn. */
+/* Return TRUE if INSN is a return jump. */
-static int
-returnjump_p_1 (rtx *loc, void *data ATTRIBUTE_UNUSED)
+int
+returnjump_p (const rtx_insn *insn)
{
- rtx x = *loc;
-
- return x && (GET_CODE (x) == RETURN
- || (GET_CODE (x) == SET && SET_IS_RETURN_P (x)));
+ if (JUMP_P (insn))
+ {
+ subrtx_iterator::array_type array;
+ FOR_EACH_SUBRTX (iter, array, PATTERN (insn), NONCONST)
+ {
+ const_rtx x = *iter;
+ switch (GET_CODE (x))
+ {
+ case RETURN:
+ case SIMPLE_RETURN:
+ case EH_RETURN:
+ return true;
+
+ case SET:
+ if (SET_IS_RETURN_P (x))
+ return true;
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+ return false;
}
+/* Return true if INSN is a (possibly conditional) return insn. */
+
int
-returnjump_p (rtx insn)
+eh_returnjump_p (rtx_insn *insn)
{
- if (!JUMP_P (insn))
- return 0;
- return for_each_rtx (&PATTERN (insn), returnjump_p_1, NULL);
+ if (JUMP_P (insn))
+ {
+ subrtx_iterator::array_type array;
+ FOR_EACH_SUBRTX (iter, array, PATTERN (insn), NONCONST)
+ if (GET_CODE (*iter) == EH_RETURN)
+ return true;
+ }
+ return false;
}
/* Return true if INSN is a jump that only transfers control and
nothing more. */
int
-onlyjump_p (rtx insn)
+onlyjump_p (const rtx_insn *insn)
{
rtx set;
return 1;
}
+/* Return true iff INSN is a jump and its JUMP_LABEL is a label, not
+ NULL or a return. */
+bool
+jump_to_label_p (const rtx_insn *insn)
+{
+ return (JUMP_P (insn)
+ && JUMP_LABEL (insn) != NULL && !ANY_RETURN_P (JUMP_LABEL (insn)));
+}
+
#ifdef HAVE_cc0
/* Return nonzero if X is an RTX that only sets the condition codes
and has no side effects. */
int
-only_sets_cc0_p (rtx x)
+only_sets_cc0_p (const_rtx x)
{
if (! x)
return 0;
but also does other things. */
int
-sets_cc0_p (rtx x)
+sets_cc0_p (const_rtx x)
{
if (! x)
return 0;
}
#endif
\f
-/* Find all CODE_LABELs referred to in X, and increment their use counts.
- If INSN is a JUMP_INSN and there is at least one CODE_LABEL referenced
- in INSN, then store one of them in JUMP_LABEL (INSN).
- If INSN is an INSN or a CALL_INSN and there is at least one CODE_LABEL
- referenced in INSN, add a REG_LABEL note containing that label to INSN.
- Also, when there are consecutive labels, canonicalize on the last of them.
+/* Find all CODE_LABELs referred to in X, and increment their use
+ counts. If INSN is a JUMP_INSN and there is at least one
+ CODE_LABEL referenced in INSN as a jump target, then store the last
+ one in JUMP_LABEL (INSN). For a tablejump, this must be the label
+ for the ADDR_VEC. Store any other jump targets as REG_LABEL_TARGET
+ notes. If INSN is an INSN or a CALL_INSN or non-target operands of
+ a JUMP_INSN, and there is at least one CODE_LABEL referenced in
+ INSN, add a REG_LABEL_OPERAND note containing that label to INSN.
+ For returnjumps, the JUMP_LABEL will also be set as appropriate.
Note that two labels separated by a loop-beginning note
must be kept distinct if we have not yet done loop-optimization,
that loop-optimization is done with. */
void
-mark_jump_label (rtx x, rtx insn, int in_mem)
+mark_jump_label (rtx x, rtx_insn *insn, int in_mem)
+{
+ rtx asmop = extract_asm_operands (x);
+ if (asmop)
+ mark_jump_label_asm (asmop, insn);
+ else
+ mark_jump_label_1 (x, insn, in_mem != 0,
+ (insn != NULL && x == PATTERN (insn) && JUMP_P (insn)));
+}
+
+/* Worker function for mark_jump_label. IN_MEM is TRUE when X occurs
+ within a (MEM ...). IS_TARGET is TRUE when X is to be treated as a
+ jump-target; when the JUMP_LABEL field of INSN should be set or a
+ REG_LABEL_TARGET note should be added, not a REG_LABEL_OPERAND
+ note. */
+
+static void
+mark_jump_label_1 (rtx x, rtx_insn *insn, bool in_mem, bool is_target)
{
RTX_CODE code = GET_CODE (x);
int i;
case PC:
case CC0:
case REG:
- case CONST_INT:
- case CONST_DOUBLE:
case CLOBBER:
case CALL:
return;
+ case RETURN:
+ case SIMPLE_RETURN:
+ if (is_target)
+ {
+ gcc_assert (JUMP_LABEL (insn) == NULL || JUMP_LABEL (insn) == x);
+ JUMP_LABEL (insn) = x;
+ }
+ return;
+
case MEM:
- in_mem = 1;
+ in_mem = true;
break;
case SEQUENCE:
- for (i = 0; i < XVECLEN (x, 0); i++)
- mark_jump_label (PATTERN (XVECEXP (x, 0, i)),
- XVECEXP (x, 0, i), 0);
+ {
+ rtx_sequence *seq = as_a <rtx_sequence *> (x);
+ for (i = 0; i < seq->len (); i++)
+ mark_jump_label (PATTERN (seq->insn (i)),
+ seq->insn (i), 0);
+ }
return;
case SYMBOL_REF:
/* If this is a constant-pool reference, see if it is a label. */
if (CONSTANT_POOL_ADDRESS_P (x))
- mark_jump_label (get_pool_constant (x), insn, in_mem);
+ mark_jump_label_1 (get_pool_constant (x), insn, in_mem, is_target);
break;
+ /* Handle operands in the condition of an if-then-else as for a
+ non-jump insn. */
+ case IF_THEN_ELSE:
+ if (!is_target)
+ break;
+ mark_jump_label_1 (XEXP (x, 0), insn, in_mem, false);
+ mark_jump_label_1 (XEXP (x, 1), insn, in_mem, true);
+ mark_jump_label_1 (XEXP (x, 2), insn, in_mem, true);
+ return;
+
case LABEL_REF:
{
- rtx label = XEXP (x, 0);
+ rtx label = LABEL_REF_LABEL (x);
/* Ignore remaining references to unreachable labels that
have been deleted. */
if (NOTE_P (label)
- && NOTE_LINE_NUMBER (label) == NOTE_INSN_DELETED_LABEL)
+ && NOTE_KIND (label) == NOTE_INSN_DELETED_LABEL)
break;
gcc_assert (LABEL_P (label));
if (LABEL_REF_NONLOCAL_P (x))
break;
- XEXP (x, 0) = label;
- if (! insn || ! INSN_DELETED_P (insn))
+ LABEL_REF_LABEL (x) = label;
+ if (! insn || ! insn->deleted ())
++LABEL_NUSES (label);
if (insn)
{
- if (JUMP_P (insn))
+ if (is_target
+ /* Do not change a previous setting of JUMP_LABEL. If the
+ JUMP_LABEL slot is occupied by a different label,
+ create a note for this label. */
+ && (JUMP_LABEL (insn) == NULL || JUMP_LABEL (insn) == label))
JUMP_LABEL (insn) = label;
else
{
- /* Add a REG_LABEL note for LABEL unless there already
- is one. All uses of a label, except for labels
- that are the targets of jumps, must have a
- REG_LABEL note. */
- if (! find_reg_note (insn, REG_LABEL, label))
- REG_NOTES (insn) = gen_rtx_INSN_LIST (REG_LABEL, label,
- REG_NOTES (insn));
+ enum reg_note kind
+ = is_target ? REG_LABEL_TARGET : REG_LABEL_OPERAND;
+
+ /* Add a REG_LABEL_OPERAND or REG_LABEL_TARGET note
+ for LABEL unless there already is one. All uses of
+ a label, except for the primary target of a jump,
+ must have such a note. */
+ if (! find_reg_note (insn, kind, label))
+ add_reg_note (insn, kind, label);
}
}
return;
}
- /* Do walk the labels in a vector, but not the first operand of an
- ADDR_DIFF_VEC. Don't set the JUMP_LABEL of a vector. */
+ /* Do walk the labels in a vector, but not the first operand of an
+ ADDR_DIFF_VEC. Don't set the JUMP_LABEL of a vector. */
case ADDR_VEC:
case ADDR_DIFF_VEC:
- if (! INSN_DELETED_P (insn))
+ if (! insn->deleted ())
{
int eltnum = code == ADDR_DIFF_VEC ? 1 : 0;
for (i = 0; i < XVECLEN (x, eltnum); i++)
- mark_jump_label (XVECEXP (x, eltnum, i), NULL_RTX, in_mem);
+ mark_jump_label_1 (XVECEXP (x, eltnum, i), NULL, in_mem,
+ is_target);
}
return;
}
fmt = GET_RTX_FORMAT (code);
+
+ /* The primary target of a tablejump is the label of the ADDR_VEC,
+ which is canonically mentioned *last* in the insn. To get it
+ marked as JUMP_LABEL, we iterate over items in reverse order. */
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
- mark_jump_label (XEXP (x, i), insn, in_mem);
+ mark_jump_label_1 (XEXP (x, i), insn, in_mem, is_target);
else if (fmt[i] == 'E')
{
int j;
- for (j = 0; j < XVECLEN (x, i); j++)
- mark_jump_label (XVECEXP (x, i, j), insn, in_mem);
+
+ for (j = XVECLEN (x, i) - 1; j >= 0; j--)
+ mark_jump_label_1 (XVECEXP (x, i, j), insn, in_mem,
+ is_target);
}
}
}
+/* Worker function for mark_jump_label. Handle asm insns specially.
+ In particular, output operands need not be considered so we can
+ avoid re-scanning the replicated asm_operand. Also, the asm_labels
+ need to be considered targets. */
+
+static void
+mark_jump_label_asm (rtx asmop, rtx_insn *insn)
+{
+ int i;
+
+ for (i = ASM_OPERANDS_INPUT_LENGTH (asmop) - 1; i >= 0; --i)
+ mark_jump_label_1 (ASM_OPERANDS_INPUT (asmop, i), insn, false, false);
+
+ for (i = ASM_OPERANDS_LABEL_LENGTH (asmop) - 1; i >= 0; --i)
+ mark_jump_label_1 (ASM_OPERANDS_LABEL (asmop, i), insn, false, true);
+}
\f
/* Delete insn INSN from the chain of insns and update label ref counts
and delete insns now unreachable.
Usage of this instruction is deprecated. Use delete_insn instead and
subsequent cfg_cleanup pass to delete unreachable code if needed. */
-rtx
-delete_related_insns (rtx insn)
+rtx_insn *
+delete_related_insns (rtx uncast_insn)
{
+ rtx_insn *insn = as_a <rtx_insn *> (uncast_insn);
int was_code_label = (LABEL_P (insn));
rtx note;
- rtx next = NEXT_INSN (insn), prev = PREV_INSN (insn);
+ rtx_insn *next = NEXT_INSN (insn), *prev = PREV_INSN (insn);
- while (next && INSN_DELETED_P (next))
+ while (next && next->deleted ())
next = NEXT_INSN (next);
/* This insn is already deleted => return first following nondeleted. */
- if (INSN_DELETED_P (insn))
+ if (insn->deleted ())
return next;
delete_insn (insn);
if (next != 0 && BARRIER_P (next))
delete_insn (next);
+ /* If this is a call, then we have to remove the var tracking note
+ for the call arguments. */
+
+ if (CALL_P (insn)
+ || (NONJUMP_INSN_P (insn)
+ && GET_CODE (PATTERN (insn)) == SEQUENCE
+ && CALL_P (XVECEXP (PATTERN (insn), 0, 0))))
+ {
+ rtx_insn *p;
+
+ for (p = next && next->deleted () ? NEXT_INSN (next) : next;
+ p && NOTE_P (p);
+ p = NEXT_INSN (p))
+ if (NOTE_KIND (p) == NOTE_INSN_CALL_ARG_LOCATION)
+ {
+ remove_insn (p);
+ break;
+ }
+ }
+
/* If deleting a jump, decrement the count of the label,
and delete the label if it is now unused. */
- if (JUMP_P (insn) && JUMP_LABEL (insn))
+ if (jump_to_label_p (insn))
{
- rtx lab = JUMP_LABEL (insn), lab_next;
+ rtx lab = JUMP_LABEL (insn);
+ rtx_jump_table_data *lab_next;
if (LABEL_NUSES (lab) == 0)
- {
- /* This can delete NEXT or PREV,
- either directly if NEXT is JUMP_LABEL (INSN),
- or indirectly through more levels of jumps. */
- delete_related_insns (lab);
-
- /* I feel a little doubtful about this loop,
- but I see no clean and sure alternative way
- to find the first insn after INSN that is not now deleted.
- I hope this works. */
- while (next && INSN_DELETED_P (next))
- next = NEXT_INSN (next);
- return next;
- }
+ /* This can delete NEXT or PREV,
+ either directly if NEXT is JUMP_LABEL (INSN),
+ or indirectly through more levels of jumps. */
+ delete_related_insns (lab);
else if (tablejump_p (insn, NULL, &lab_next))
{
/* If we're deleting the tablejump, delete the dispatch table.
/* Likewise if we're deleting a dispatch table. */
- if (JUMP_P (insn)
- && (GET_CODE (PATTERN (insn)) == ADDR_VEC
- || GET_CODE (PATTERN (insn)) == ADDR_DIFF_VEC))
+ if (rtx_jump_table_data *table = dyn_cast <rtx_jump_table_data *> (insn))
{
- rtx pat = PATTERN (insn);
- int i, diff_vec_p = GET_CODE (pat) == ADDR_DIFF_VEC;
- int len = XVECLEN (pat, diff_vec_p);
+ rtvec labels = table->get_labels ();
+ int i;
+ int len = GET_NUM_ELEM (labels);
for (i = 0; i < len; i++)
- if (LABEL_NUSES (XEXP (XVECEXP (pat, diff_vec_p, i), 0)) == 0)
- delete_related_insns (XEXP (XVECEXP (pat, diff_vec_p, i), 0));
- while (next && INSN_DELETED_P (next))
+ if (LABEL_NUSES (XEXP (RTVEC_ELT (labels, i), 0)) == 0)
+ delete_related_insns (XEXP (RTVEC_ELT (labels, i), 0));
+ while (next && next->deleted ())
next = NEXT_INSN (next);
return next;
}
- /* Likewise for an ordinary INSN / CALL_INSN with a REG_LABEL note. */
- if (NONJUMP_INSN_P (insn) || CALL_P (insn))
+ /* Likewise for any JUMP_P / INSN / CALL_INSN with a
+ REG_LABEL_OPERAND or REG_LABEL_TARGET note. */
+ if (INSN_P (insn))
for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
- if (REG_NOTE_KIND (note) == REG_LABEL
+ if ((REG_NOTE_KIND (note) == REG_LABEL_OPERAND
+ || REG_NOTE_KIND (note) == REG_LABEL_TARGET)
/* This could also be a NOTE_INSN_DELETED_LABEL note. */
&& LABEL_P (XEXP (note, 0)))
if (LABEL_NUSES (XEXP (note, 0)) == 0)
delete_related_insns (XEXP (note, 0));
- while (prev && (INSN_DELETED_P (prev) || NOTE_P (prev)))
+ while (prev && (prev->deleted () || NOTE_P (prev)))
prev = PREV_INSN (prev);
/* If INSN was a label and a dispatch table follows it,
if (was_code_label
&& NEXT_INSN (insn) != 0
- && JUMP_P (NEXT_INSN (insn))
- && (GET_CODE (PATTERN (NEXT_INSN (insn))) == ADDR_VEC
- || GET_CODE (PATTERN (NEXT_INSN (insn))) == ADDR_DIFF_VEC))
+ && JUMP_TABLE_DATA_P (NEXT_INSN (insn)))
next = delete_related_insns (NEXT_INSN (insn));
/* If INSN was a label, delete insns following it if now unreachable. */
if (code == NOTE)
next = NEXT_INSN (next);
/* Keep going past other deleted labels to delete what follows. */
- else if (code == CODE_LABEL && INSN_DELETED_P (next))
+ else if (code == CODE_LABEL && next->deleted ())
+ next = NEXT_INSN (next);
+ /* Keep the (use (insn))s created by dbr_schedule, which needs
+ them in order to track liveness relative to a previous
+ barrier. */
+ else if (INSN_P (next)
+ && GET_CODE (PATTERN (next)) == USE
+ && INSN_P (XEXP (PATTERN (next), 0)))
next = NEXT_INSN (next);
else if (code == BARRIER || INSN_P (next))
/* Note: if this deletes a jump, it can cause more
}
}
+ /* I feel a little doubtful about this loop,
+ but I see no clean and sure alternative way
+ to find the first insn after INSN that is not now deleted.
+ I hope this works. */
+ while (next && next->deleted ())
+ next = NEXT_INSN (next);
return next;
}
\f
peephole insn that will replace them. */
void
-delete_for_peephole (rtx from, rtx to)
+delete_for_peephole (rtx_insn *from, rtx_insn *to)
{
- rtx insn = from;
+ rtx_insn *insn = from;
while (1)
{
- rtx next = NEXT_INSN (insn);
- rtx prev = PREV_INSN (insn);
+ rtx_insn *next = NEXT_INSN (insn);
+ rtx_insn *prev = PREV_INSN (insn);
if (!NOTE_P (insn))
{
- INSN_DELETED_P (insn) = 1;
+ insn->set_deleted();
/* Patch this insn out of the chain. */
/* We don't do this all at once, because we
must preserve all NOTEs. */
if (prev)
- NEXT_INSN (prev) = next;
+ SET_NEXT_INSN (prev) = next;
if (next)
- PREV_INSN (next) = prev;
+ SET_PREV_INSN (next) = prev;
}
if (insn == to)
is also an unconditional jump in that case. */
}
\f
+/* A helper function for redirect_exp_1; examines its input X and returns
+ either a LABEL_REF around a label, or a RETURN if X was NULL. */
+static rtx
+redirect_target (rtx x)
+{
+ if (x == NULL_RTX)
+ return ret_rtx;
+ if (!ANY_RETURN_P (x))
+ return gen_rtx_LABEL_REF (Pmode, x);
+ return x;
+}
+
/* Throughout LOC, redirect OLABEL to NLABEL. Treat null OLABEL or
NLABEL as a return. Accrue modifications into the change group. */
int i;
const char *fmt;
- if (code == LABEL_REF)
+ if ((code == LABEL_REF && LABEL_REF_LABEL (x) == olabel)
+ || x == olabel)
{
- if (XEXP (x, 0) == olabel)
- {
- rtx n;
- if (nlabel)
- n = gen_rtx_LABEL_REF (Pmode, nlabel);
- else
- n = gen_rtx_RETURN (VOIDmode);
-
- validate_change (insn, loc, n, 1);
- return;
- }
- }
- else if (code == RETURN && olabel == 0)
- {
- if (nlabel)
- x = gen_rtx_LABEL_REF (Pmode, nlabel);
- else
- x = gen_rtx_RETURN (VOIDmode);
- if (loc == &PATTERN (insn))
- x = gen_rtx_SET (VOIDmode, pc_rtx, x);
+ x = redirect_target (nlabel);
+ if (GET_CODE (x) == LABEL_REF && loc == &PATTERN (insn))
+ x = gen_rtx_SET (VOIDmode, pc_rtx, x);
validate_change (insn, loc, x, 1);
return;
}
- if (code == SET && nlabel == 0 && SET_DEST (x) == pc_rtx
+ if (code == SET && SET_DEST (x) == pc_rtx
+ && ANY_RETURN_P (nlabel)
&& GET_CODE (SET_SRC (x)) == LABEL_REF
- && XEXP (SET_SRC (x), 0) == olabel)
+ && LABEL_REF_LABEL (SET_SRC (x)) == olabel)
+ {
+ validate_change (insn, loc, nlabel, 1);
+ return;
+ }
+
+ if (code == IF_THEN_ELSE)
{
- validate_change (insn, loc, gen_rtx_RETURN (VOIDmode), 1);
+ /* Skip the condition of an IF_THEN_ELSE. We only want to
+ change jump destinations, not eventual label comparisons. */
+ redirect_exp_1 (&XEXP (x, 1), olabel, nlabel, insn);
+ redirect_exp_1 (&XEXP (x, 2), olabel, nlabel, insn);
return;
}
redirect_jump_1 (rtx jump, rtx nlabel)
{
int ochanges = num_validated_changes ();
- rtx *loc;
+ rtx *loc, asmop;
- if (GET_CODE (PATTERN (jump)) == PARALLEL)
+ gcc_assert (nlabel != NULL_RTX);
+ asmop = extract_asm_operands (PATTERN (jump));
+ if (asmop)
+ {
+ if (nlabel == NULL)
+ return 0;
+ gcc_assert (ASM_OPERANDS_LABEL_LENGTH (asmop) == 1);
+ loc = &ASM_OPERANDS_LABEL (asmop, 0);
+ }
+ else if (GET_CODE (PATTERN (jump)) == PARALLEL)
loc = &XVECEXP (PATTERN (jump), 0, 0);
else
loc = &PATTERN (jump);
jump target label is unused as a result, it and the code following
it may be deleted.
- If NLABEL is zero, we are to turn the jump into a (possibly conditional)
- RETURN insn.
+ Normally, NLABEL will be a label, but it may also be a RETURN rtx;
+ in that case we are to turn the jump into a (possibly conditional)
+ return insn.
The return value will be 1 if the change was made, 0 if it wasn't
- (this can only occur for NLABEL == 0). */
+ (this can only occur when trying to produce return insns). */
int
redirect_jump (rtx jump, rtx nlabel, int delete_unused)
{
rtx olabel = JUMP_LABEL (jump);
+ if (!nlabel)
+ {
+ /* If there is no label, we are asked to redirect to the EXIT block.
+ When before the epilogue is emitted, return/simple_return cannot be
+ created so we return 0 immediately. After the epilogue is emitted,
+ we always expect a label, either a non-null label, or a
+ return/simple_return RTX. */
+
+ if (!epilogue_completed)
+ return 0;
+ gcc_unreachable ();
+ }
+
if (nlabel == olabel)
return 1;
}
/* Fix up JUMP_LABEL and label ref counts after OLABEL has been replaced with
- NLABEL in JUMP.
+ NLABEL in JUMP.
If DELETE_UNUSED is positive, delete related insn to OLABEL if its ref
count has dropped to zero. */
void
{
rtx note;
+ gcc_assert (JUMP_LABEL (jump) == olabel);
+
/* Negative DELETE_UNUSED used to be used to signalize behavior on
moving FUNCTION_END note. Just sanity check that no user still worry
about this. */
gcc_assert (delete_unused >= 0);
JUMP_LABEL (jump) = nlabel;
- if (nlabel)
+ if (!ANY_RETURN_P (nlabel))
++LABEL_NUSES (nlabel);
/* Update labels in any REG_EQUAL note. */
if ((note = find_reg_note (jump, REG_EQUAL, NULL_RTX)) != NULL_RTX)
{
- if (!nlabel || (invert && !invert_exp_1 (XEXP (note, 0), jump)))
+ if (ANY_RETURN_P (nlabel)
+ || (invert && !invert_exp_1 (XEXP (note, 0), jump)))
remove_note (jump, note);
else
{
}
}
- if (olabel && --LABEL_NUSES (olabel) == 0 && delete_unused > 0
+ /* Handle the case where we had a conditional crossing jump to a return
+ label and are now changing it into a direct conditional return.
+ The jump is no longer crossing in that case. */
+ if (ANY_RETURN_P (nlabel))
+ CROSSING_JUMP_P (jump) = 0;
+
+ if (!ANY_RETURN_P (olabel)
+ && --LABEL_NUSES (olabel) == 0 && delete_unused > 0
/* Undefined labels will remain outside the insn stream. */
&& INSN_UID (olabel))
delete_related_insns (olabel);
inversion and redirection. */
int
-invert_jump_1 (rtx jump, rtx nlabel)
+invert_jump_1 (rtx_insn *jump, rtx nlabel)
{
rtx x = pc_set (jump);
int ochanges;
int ok;
ochanges = num_validated_changes ();
- gcc_assert (x);
+ if (x == NULL)
+ return 0;
ok = invert_exp_1 (SET_SRC (x), jump);
gcc_assert (ok);
-
+
if (num_validated_changes () == ochanges)
return 0;
NLABEL instead of where it jumps now. Return true if successful. */
int
-invert_jump (rtx jump, rtx nlabel, int delete_unused)
+invert_jump (rtx_insn *jump, rtx nlabel, int delete_unused)
{
rtx olabel = JUMP_LABEL (jump);
reversed. */
int
-rtx_renumbered_equal_p (rtx x, rtx y)
+rtx_renumbered_equal_p (const_rtx x, const_rtx y)
{
int i;
- enum rtx_code code = GET_CODE (x);
+ const enum rtx_code code = GET_CODE (x);
const char *fmt;
if (x == y)
{
int reg_x = -1, reg_y = -1;
int byte_x = 0, byte_y = 0;
+ struct subreg_info info;
if (GET_MODE (x) != GET_MODE (y))
return 0;
if (reg_renumber[reg_x] >= 0)
{
- reg_x = subreg_regno_offset (reg_renumber[reg_x],
- GET_MODE (SUBREG_REG (x)),
- byte_x,
- GET_MODE (x));
+ subreg_get_info (reg_renumber[reg_x],
+ GET_MODE (SUBREG_REG (x)), byte_x,
+ GET_MODE (x), &info);
+ if (!info.representable_p)
+ return 0;
+ reg_x = info.offset;
byte_x = 0;
}
}
if (reg_renumber[reg_y] >= 0)
{
- reg_y = subreg_regno_offset (reg_renumber[reg_y],
- GET_MODE (SUBREG_REG (y)),
- byte_y,
- GET_MODE (y));
+ subreg_get_info (reg_renumber[reg_y],
+ GET_MODE (SUBREG_REG (y)), byte_y,
+ GET_MODE (y), &info);
+ if (!info.representable_p)
+ return 0;
+ reg_y = info.offset;
byte_y = 0;
}
}
case CC0:
case ADDR_VEC:
case ADDR_DIFF_VEC:
- case CONST_INT:
- case CONST_DOUBLE:
+ CASE_CONST_UNIQUE:
return 0;
case LABEL_REF:
/* We can't assume nonlocal labels have their following insns yet. */
if (LABEL_REF_NONLOCAL_P (x) || LABEL_REF_NONLOCAL_P (y))
- return XEXP (x, 0) == XEXP (y, 0);
+ return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
/* Two label-refs are equivalent if they point at labels
in the same position in the instruction stream. */
- return (next_real_insn (XEXP (x, 0))
- == next_real_insn (XEXP (y, 0)));
+ return (next_real_insn (LABEL_REF_LABEL (x))
+ == next_real_insn (LABEL_REF_LABEL (y)));
case SYMBOL_REF:
return XSTR (x, 0) == XSTR (y, 0);
if (GET_MODE (x) != GET_MODE (y))
return 0;
+ /* MEMs referring to different address space are not equivalent. */
+ if (code == MEM && MEM_ADDR_SPACE (x) != MEM_ADDR_SPACE (y))
+ return 0;
+
/* For commutative operations, the RTX match if the operand match in any
order. Also handle the simple binary and unary cases without a loop. */
if (targetm.commutative_p (x, UNKNOWN))
case 'i':
if (XINT (x, i) != XINT (y, i))
- return 0;
+ {
+ if (((code == ASM_OPERANDS && i == 6)
+ || (code == ASM_INPUT && i == 1)))
+ break;
+ return 0;
+ }
break;
case 't':
return -1. Any rtx is valid for X. */
int
-true_regnum (rtx x)
+true_regnum (const_rtx x)
{
if (REG_P (x))
{
- if (REGNO (x) >= FIRST_PSEUDO_REGISTER && reg_renumber[REGNO (x)] >= 0)
+ if (REGNO (x) >= FIRST_PSEUDO_REGISTER
+ && (lra_in_progress || reg_renumber[REGNO (x)] >= 0))
return reg_renumber[REGNO (x)];
return REGNO (x);
}
{
int base = true_regnum (SUBREG_REG (x));
if (base >= 0
- && base < FIRST_PSEUDO_REGISTER
- && subreg_offset_representable_p (REGNO (SUBREG_REG (x)),
- GET_MODE (SUBREG_REG (x)),
- SUBREG_BYTE (x), GET_MODE (x)))
- return base + subreg_regno_offset (REGNO (SUBREG_REG (x)),
- GET_MODE (SUBREG_REG (x)),
- SUBREG_BYTE (x), GET_MODE (x));
+ && base < FIRST_PSEUDO_REGISTER)
+ {
+ struct subreg_info info;
+
+ subreg_get_info (lra_in_progress
+ ? (unsigned) base : REGNO (SUBREG_REG (x)),
+ GET_MODE (SUBREG_REG (x)),
+ SUBREG_BYTE (x), GET_MODE (x), &info);
+
+ if (info.representable_p)
+ return base + info.offset;
+ }
}
return -1;
}
/* Return regno of the register REG and handle subregs too. */
unsigned int
-reg_or_subregno (rtx reg)
+reg_or_subregno (const_rtx reg)
{
if (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);