return rtx_mem_access_p (PATTERN (insn));
}
+/* Return true if DEF_INSN contains address being auto-inc or auto-dec
+ which is used in USE_INSN. Otherwise return false. The result is
+ being used to decide whether to remove the edge between def_insn and
+ use_insn when -fmodulo-sched-allow-regmoves is set. This function
+ doesn't need to consider the specific address register; no reg_moves
+ will be allowed for any life range defined by def_insn and used
+ by use_insn, if use_insn uses an address register auto-inc'ed by
+ def_insn. */
+bool
+autoinc_var_is_used_p (rtx def_insn, rtx use_insn)
+{
+ rtx note;
+
+ for (note = REG_NOTES (def_insn); note; note = XEXP (note, 1))
+ if (REG_NOTE_KIND (note) == REG_INC
+ && reg_referenced_p (XEXP (note, 0), PATTERN (use_insn)))
+ return true;
+
+ return false;
+}
+
/* Computes the dependence parameters (latency, distance etc.), creates
a ddg_edge and adds it to the given DDG. */
static void
compensate for that by generating reg-moves based on the life-range
analysis. The anti-deps that will be deleted are the ones which
have true-deps edges in the opposite direction (in other words
- the kernel has only one def of the relevant register). TODO:
- support the removal of all anti-deps edges, i.e. including those
+ the kernel has only one def of the relevant register).
+ If the address that is being auto-inc or auto-dec in DEST_NODE
+ is used in SRC_NODE then do not remove the edge to make sure
+ reg-moves will not be created for this address.
+ TODO: support the removal of all anti-deps edges, i.e. including those
whose register has multiple defs in the loop. */
- if (flag_modulo_sched_allow_regmoves && (t == ANTI_DEP && dt == REG_DEP))
+ if (flag_modulo_sched_allow_regmoves
+ && (t == ANTI_DEP && dt == REG_DEP)
+ && !autoinc_var_is_used_p (dest_node->insn, src_node->insn))
{
rtx set;
gcc_assert (first_def_node);
/* Always create the edge if the use node is a branch in
- order to prevent the creation of reg-moves. */
+ order to prevent the creation of reg-moves.
+ If the address that is being auto-inc or auto-dec in LAST_DEF
+ is used in USE_INSN then do not remove the edge to make sure
+ reg-moves will not be created for that address. */
if (DF_REF_ID (last_def) != DF_REF_ID (first_def)
|| !flag_modulo_sched_allow_regmoves
- || JUMP_P (use_node->insn))
+ || JUMP_P (use_node->insn)
+ || autoinc_var_is_used_p (DF_REF_INSN (last_def), use_insn))
create_ddg_dep_no_link (g, use_node, first_def_node, ANTI_DEP,
REG_DEP, 1);
we assume no regmoves are generated as the doloop
instructions are tied to the branch with an edge. */
gcc_assert (set);
+ /* If the instruction contains auto-inc register then
+ validate that the regmov is being generated for the
+ target regsiter rather then the inc'ed register. */
+ gcc_assert (!autoinc_var_is_used_p (u->insn, e->dest->insn));
}
nreg_moves = MAX (nreg_moves, nreg_moves4e);
continue;
}
- /* Don't handle BBs with calls or barriers or auto-increment insns
- (to avoid creating invalid reg-moves for the auto-increment insns),
+ /* Don't handle BBs with calls or barriers
or !single_set with the exception of instructions that include
count_reg---these instructions are part of the control part
that do-loop recognizes.
- ??? Should handle auto-increment insns.
??? Should handle insns defining subregs. */
for (insn = head; insn != NEXT_INSN (tail); insn = NEXT_INSN (insn))
{
|| (NONDEBUG_INSN_P (insn) && !JUMP_P (insn)
&& !single_set (insn) && GET_CODE (PATTERN (insn)) != USE
&& !reg_mentioned_p (count_reg, insn))
- || (FIND_REG_INC_NOTE (insn, NULL_RTX) != 0)
|| (INSN_P (insn) && (set = single_set (insn))
&& GET_CODE (SET_DEST (set)) == SUBREG))
break;
fprintf (dump_file, "SMS loop-with-call\n");
else if (BARRIER_P (insn))
fprintf (dump_file, "SMS loop-with-barrier\n");
- else if (FIND_REG_INC_NOTE (insn, NULL_RTX) != 0)
- fprintf (dump_file, "SMS reg inc\n");
else if ((NONDEBUG_INSN_P (insn) && !JUMP_P (insn)
&& !single_set (insn) && GET_CODE (PATTERN (insn)) != USE))
fprintf (dump_file, "SMS loop-with-not-single-set\n");
--- /dev/null
+ /* { dg-do run } */
+ /* { dg-options "-O2 -fmodulo-sched -fmodulo-sched-allow-regmoves -fdump-rtl-sms" } */
+
+
+typedef __SIZE_TYPE__ size_t;
+extern void *malloc (size_t);
+extern void free (void *);
+extern void abort (void);
+
+struct regstat_n_sets_and_refs_t
+{
+ int sets;
+ int refs;
+};
+
+struct regstat_n_sets_and_refs_t *regstat_n_sets_and_refs;
+
+struct df_reg_info
+{
+ unsigned int n_refs;
+};
+
+struct df_d
+{
+ struct df_reg_info **def_regs;
+ struct df_reg_info **use_regs;
+};
+struct df_d *df;
+
+static inline int
+REG_N_SETS (int regno)
+{
+ return regstat_n_sets_and_refs[regno].sets;
+}
+
+__attribute__ ((noinline))
+ int max_reg_num (void)
+{
+ return 100;
+}
+
+__attribute__ ((noinline))
+ void regstat_init_n_sets_and_refs (void)
+{
+ unsigned int i;
+ unsigned int max_regno = max_reg_num ();
+
+ for (i = 0; i < max_regno; i++)
+ {
+ (regstat_n_sets_and_refs[i].sets = (df->def_regs[(i)]->n_refs));
+ (regstat_n_sets_and_refs[i].refs =
+ (df->use_regs[(i)]->n_refs) + REG_N_SETS (i));
+ }
+}
+
+int a_sets[100] =
+ { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
+ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
+ 40, 41, 42,
+ 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
+ 62, 63, 64,
+ 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,
+ 84, 85, 86,
+ 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99
+};
+
+int a_refs[100] =
+ { 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38,
+ 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76,
+ 78, 80, 82,
+ 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116,
+ 118, 120,
+ 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150,
+ 152, 154, 156,
+ 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186,
+ 188, 190, 192,
+ 194, 196, 198
+};
+
+int
+main ()
+{
+ struct df_reg_info *b[100], *c[100];
+ struct df_d df1;
+ size_t s = sizeof (struct df_reg_info);
+ struct regstat_n_sets_and_refs_t a[100];
+
+ df = &df1;
+ regstat_n_sets_and_refs = a;
+ int i;
+
+ for (i = 0; i < 100; i++)
+ {
+ b[i] = (struct df_reg_info *) malloc (s);
+ b[i]->n_refs = i;
+ c[i] = (struct df_reg_info *) malloc (s);
+ c[i]->n_refs = i;
+ }
+
+ df1.def_regs = b;
+ df1.use_regs = c;
+ regstat_init_n_sets_and_refs ();
+
+ for (i = 0; i < 100; i++)
+ if ((a[i].sets != a_sets[i]) || (a[i].refs != a_refs[i]))
+ abort ();
+
+ for (i = 0; i < 100; i++)
+ {
+ free (b[i]);
+ free (c[i]);
+ }
+
+ return 0;
+}
+
+/* { dg-final { scan-rtl-dump-times "SMS succeeded" 1 "sms" { target powerpc*-*-* } } } */
+/* { dg-final { cleanup-rtl-dump "sms" } } */
+
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