summaryrefslogtreecommitdiff
path: root/gcc/config/rl78/rl78.c
diff options
context:
space:
mode:
Diffstat (limited to 'gcc/config/rl78/rl78.c')
-rw-r--r--gcc/config/rl78/rl78.c1280
1 files changed, 1042 insertions, 238 deletions
diff --git a/gcc/config/rl78/rl78.c b/gcc/config/rl78/rl78.c
index d7cacc16352..cd9010ab190 100644
--- a/gcc/config/rl78/rl78.c
+++ b/gcc/config/rl78/rl78.c
@@ -50,6 +50,8 @@
#include "dumpfile.h"
#include "tree-pass.h"
#include "context.h"
+#include "tm-constrs.h" /* for satisfies_constraint_*(). */
+#include "insn-flags.h" /* for gen_*(). */
static inline bool is_interrupt_func (const_tree decl);
static inline bool is_brk_interrupt_func (const_tree decl);
@@ -168,6 +170,86 @@ make_pass_rl78_devirt (gcc::context *ctxt)
return new pass_rl78_devirt (ctxt);
}
+static unsigned int
+move_elim_pass (void)
+{
+ rtx insn, ninsn, prev = NULL_RTX;
+
+ for (insn = get_insns (); insn; insn = ninsn)
+ {
+ rtx set;
+
+ ninsn = next_nonnote_nondebug_insn (insn);
+
+ if ((set = single_set (insn)) == NULL_RTX)
+ {
+ prev = NULL_RTX;
+ continue;
+ }
+
+ /* If we have two SET insns in a row (without anything
+ between them) and the source of the second one is the
+ destination of the first one, and vice versa, then we
+ can eliminate the second SET. */
+ if (prev
+ && rtx_equal_p (SET_DEST (prev), SET_SRC (set))
+ && rtx_equal_p (SET_DEST (set), SET_SRC (prev))
+ )
+ {
+ if (dump_file)
+ fprintf (dump_file, " Delete insn %d because it is redundant\n",
+ INSN_UID (insn));
+
+ delete_insn (insn);
+ prev = NULL_RTX;
+ }
+ else
+ prev = set;
+ }
+
+ if (dump_file)
+ print_rtl_with_bb (dump_file, get_insns (), 0);
+
+ return 0;
+}
+
+namespace {
+
+const pass_data pass_data_rl78_move_elim =
+{
+ RTL_PASS, /* type */
+ "move_elim", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ true, /* has_gate */
+ true, /* has_execute */
+ TV_MACH_DEP, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_rl78_move_elim : public rtl_opt_pass
+{
+public:
+ pass_rl78_move_elim(gcc::context *ctxt)
+ : rtl_opt_pass(pass_data_rl78_move_elim, ctxt)
+ {
+ }
+
+ /* opt_pass methods: */
+ bool gate () { return devirt_gate (); }
+ unsigned int execute () { return move_elim_pass (); }
+};
+
+} // anon namespace
+
+rtl_opt_pass *
+make_pass_rl78_move_elim (gcc::context *ctxt)
+{
+ return new pass_rl78_move_elim (ctxt);
+}
#undef TARGET_ASM_FILE_START
#define TARGET_ASM_FILE_START rl78_asm_file_start
@@ -184,15 +266,25 @@ rl78_asm_file_start (void)
}
opt_pass *rl78_devirt_pass = make_pass_rl78_devirt (g);
- struct register_pass_info rl78_devirt_info =
+ static struct register_pass_info rl78_devirt_info =
{
rl78_devirt_pass,
- "vartrack",
+ "pro_and_epilogue",
1,
PASS_POS_INSERT_BEFORE
};
+ opt_pass *rl78_move_elim_pass = make_pass_rl78_move_elim (g);
+ static struct register_pass_info rl78_move_elim_info =
+ {
+ rl78_move_elim_pass,
+ "bbro",
+ 1,
+ PASS_POS_INSERT_AFTER
+ };
+
register_pass (& rl78_devirt_info);
+ register_pass (& rl78_move_elim_info);
}
@@ -332,6 +424,46 @@ rl78_expand_movsi (rtx *operands)
}
}
+void
+rl78_split_movsi (rtx *operands)
+{
+ rtx op00, op02, op10, op12;
+
+ op00 = rl78_subreg (HImode, operands[0], SImode, 0);
+ op02 = rl78_subreg (HImode, operands[0], SImode, 2);
+ if (GET_CODE (operands[1]) == CONST
+ || GET_CODE (operands[1]) == SYMBOL_REF)
+ {
+ op10 = gen_rtx_ZERO_EXTRACT (HImode, operands[1], GEN_INT (16), GEN_INT (0));
+ op10 = gen_rtx_CONST (HImode, op10);
+ op12 = gen_rtx_ZERO_EXTRACT (HImode, operands[1], GEN_INT (16), GEN_INT (16));
+ op12 = gen_rtx_CONST (HImode, op12);
+ }
+ else
+ {
+ op10 = rl78_subreg (HImode, operands[1], SImode, 0);
+ op12 = rl78_subreg (HImode, operands[1], SImode, 2);
+ }
+
+ if (rtx_equal_p (operands[0], operands[1]))
+ ;
+ else if (rtx_equal_p (op00, op12))
+ {
+ operands[2] = op02;
+ operands[4] = op12;
+ operands[3] = op00;
+ operands[5] = op10;
+ }
+ else
+ {
+ operands[2] = op00;
+ operands[4] = op10;
+ operands[3] = op02;
+ operands[5] = op12;
+ }
+}
+
+
/* Used by various two-operand expanders which cannot accept all
operands in the "far" namespace. Force some such operands into
registers so that each pattern has at most one far operand. */
@@ -646,11 +778,11 @@ rl78_hl_b_c_addr_p (rtx op)
int
rl78_far_p (rtx x)
{
- if (GET_CODE (x) != MEM)
+ if (! MEM_P (x))
return 0;
#if DEBUG0
- fprintf(stderr, "\033[35mrl78_far_p: "); debug_rtx(x);
- fprintf(stderr, " = %d\033[0m\n", MEM_ADDR_SPACE (x) == ADDR_SPACE_FAR);
+ fprintf (stderr, "\033[35mrl78_far_p: "); debug_rtx(x);
+ fprintf (stderr, " = %d\033[0m\n", MEM_ADDR_SPACE (x) == ADDR_SPACE_FAR);
#endif
return MEM_ADDR_SPACE (x) == ADDR_SPACE_FAR;
}
@@ -744,6 +876,10 @@ rl78_as_legitimate_address (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x,
if (strict && base && GET_CODE (base) == REG && REGNO (base) >= FIRST_PSEUDO_REGISTER)
return false;
+ if (! cfun->machine->virt_insns_ok && base && GET_CODE (base) == REG
+ && REGNO (base) >= 8 && REGNO (base) <= 31)
+ return false;
+
return true;
}
@@ -789,8 +925,6 @@ rl78_addr_space_convert (rtx op, tree from_type, tree to_type)
{
/* This always works. */
result = gen_reg_rtx (SImode);
- debug_rtx(result);
- debug_rtx(op);
emit_move_insn (rl78_subreg (HImode, result, SImode, 0), op);
emit_move_insn (rl78_subreg (HImode, result, SImode, 2), const0_rtx);
return result;
@@ -998,7 +1132,7 @@ rl78_start_function (FILE *file, HOST_WIDE_INT hwi_local ATTRIBUTE_UNUSED)
for (i = 0; i < 16; i ++)
if (cfun->machine->need_to_push[i])
fprintf (file, " %s", word_regnames[i*2]);
- fprintf(file, "\n");
+ fprintf (file, "\n");
}
if (frame_pointer_needed)
@@ -1094,12 +1228,17 @@ rl78_function_arg_boundary (enum machine_mode mode ATTRIBUTE_UNUSED,
v - real register corresponding to a virtual register
m - minus - negative of CONST_INT value.
c - inverse of a conditional (NE vs EQ for example)
+ z - collapsed conditional
+ s - shift count mod 8
+ S - shift count mod 16
+ r - reverse shift count (8-(count mod 8))
h - bottom HI of an SI
H - top HI of an SI
q - bottom QI of an HI
Q - top QI of an HI
e - third QI of an SI (i.e. where the ES register gets values from)
+ E - fourth QI of an SI (i.e. MSB)
*/
@@ -1120,7 +1259,7 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
else
{
if (rl78_far_p (op))
- fprintf(file, "es:");
+ fprintf (file, "es:");
if (letter == 'H')
{
op = adjust_address (op, HImode, 2);
@@ -1146,15 +1285,20 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
op = adjust_address (op, QImode, 2);
letter = 0;
}
+ if (letter == 'E')
+ {
+ op = adjust_address (op, QImode, 3);
+ letter = 0;
+ }
if (CONSTANT_P (XEXP (op, 0)))
{
- fprintf(file, "!");
+ fprintf (file, "!");
rl78_print_operand_1 (file, XEXP (op, 0), letter);
}
else if (GET_CODE (XEXP (op, 0)) == PLUS
&& GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF)
{
- fprintf(file, "!");
+ fprintf (file, "!");
rl78_print_operand_1 (file, XEXP (op, 0), letter);
}
else if (GET_CODE (XEXP (op, 0)) == PLUS
@@ -1162,15 +1306,15 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
&& REGNO (XEXP (XEXP (op, 0), 0)) == 2)
{
rl78_print_operand_1 (file, XEXP (XEXP (op, 0), 1), 'u');
- fprintf(file, "[");
+ fprintf (file, "[");
rl78_print_operand_1 (file, XEXP (XEXP (op, 0), 0), 0);
- fprintf(file, "]");
+ fprintf (file, "]");
}
else
{
- fprintf(file, "[");
+ fprintf (file, "[");
rl78_print_operand_1 (file, XEXP (op, 0), letter);
- fprintf(file, "]");
+ fprintf (file, "]");
}
}
break;
@@ -1184,6 +1328,8 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
fprintf (file, "%s", reg_names [REGNO (op) & ~1]);
else if (letter == 'e')
fprintf (file, "%s", reg_names [REGNO (op) + 2]);
+ else if (letter == 'E')
+ fprintf (file, "%s", reg_names [REGNO (op) + 3]);
else if (letter == 'S')
fprintf (file, "0x%x", 0xffef8 + REGNO (op));
else if (GET_MODE (op) == HImode
@@ -1209,10 +1355,20 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
fprintf (file, "%ld", INTVAL (op) & 0xffff);
else if (letter == 'e')
fprintf (file, "%ld", (INTVAL (op) >> 16) & 0xff);
+ else if (letter == 'E')
+ fprintf (file, "%ld", (INTVAL (op) >> 24) & 0xff);
else if (letter == 'm')
fprintf (file, "%ld", - INTVAL (op));
+ else if (letter == 's')
+ fprintf (file, "%ld", INTVAL (op) % 8);
+ else if (letter == 'S')
+ fprintf (file, "%ld", INTVAL (op) % 16);
+ else if (letter == 'r')
+ fprintf (file, "%ld", 8 - (INTVAL (op) % 8));
+ else if (letter == 'C')
+ fprintf (file, "%ld", (INTVAL (op) ^ 0x8000) & 0xffff);
else
- fprintf(file, "%ld", INTVAL (op));
+ fprintf (file, "%ld", INTVAL (op));
break;
case CONST:
@@ -1316,22 +1472,68 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
break;
case LTU:
- fprintf (file, letter == 'c' ? "nc" : "c");
+ if (letter == 'z')
+ fprintf (file, "#comparison eliminated");
+ else
+ fprintf (file, letter == 'c' ? "nc" : "c");
break;
case LEU:
- fprintf (file, letter == 'c' ? "h" : "nh");
+ if (letter == 'z')
+ fprintf (file, "br");
+ else
+ fprintf (file, letter == 'c' ? "h" : "nh");
break;
case GEU:
- fprintf (file, letter == 'c' ? "c" : "nc");
+ if (letter == 'z')
+ fprintf (file, "br");
+ else
+ fprintf (file, letter == 'c' ? "c" : "nc");
break;
case GTU:
- fprintf (file, letter == 'c' ? "nh" : "h");
+ if (letter == 'z')
+ fprintf (file, "#comparison eliminated");
+ else
+ fprintf (file, letter == 'c' ? "nh" : "h");
break;
case EQ:
- fprintf (file, letter == 'c' ? "nz" : "z");
+ if (letter == 'z')
+ fprintf (file, "br");
+ else
+ fprintf (file, letter == 'c' ? "nz" : "z");
break;
case NE:
- fprintf (file, letter == 'c' ? "z" : "nz");
+ if (letter == 'z')
+ fprintf (file, "#comparison eliminated");
+ else
+ fprintf (file, letter == 'c' ? "z" : "nz");
+ break;
+
+ /* Note: these assume appropriate adjustments were made so that
+ unsigned comparisons, which is all this chip has, will
+ work. */
+ case LT:
+ if (letter == 'z')
+ fprintf (file, "#comparison eliminated");
+ else
+ fprintf (file, letter == 'c' ? "nc" : "c");
+ break;
+ case LE:
+ if (letter == 'z')
+ fprintf (file, "br");
+ else
+ fprintf (file, letter == 'c' ? "h" : "nh");
+ break;
+ case GE:
+ if (letter == 'z')
+ fprintf (file, "br");
+ else
+ fprintf (file, letter == 'c' ? "c" : "nc");
+ break;
+ case GT:
+ if (letter == 'z')
+ fprintf (file, "#comparison eliminated");
+ else
+ fprintf (file, letter == 'c' ? "nh" : "h");
break;
default:
@@ -1346,7 +1548,7 @@ rl78_print_operand_1 (FILE * file, rtx op, int letter)
static void
rl78_print_operand (FILE * file, rtx op, int letter)
{
- if (CONSTANT_P (op) && letter != 'u')
+ if (CONSTANT_P (op) && letter != 'u' && letter != 's' && letter != 'r' && letter != 'S')
fprintf (file, "#");
rl78_print_operand_1 (file, op, letter);
}
@@ -1391,66 +1593,8 @@ rl78_trampoline_adjust_address (rtx m_tramp)
void
rl78_expand_compare (rtx *operands)
{
- /* RL78 does not have signed comparisons. We must modify the
- operands to be in the unsigned range, and emit an unsigned
- comparison. */
-
- enum machine_mode mode;
- rtx high_bit;
- int i;
- RTX_CODE new_cond;
-
- switch (GET_CODE (operands[0]))
- {
- case GE:
- new_cond = GEU;
- break;
- case LE:
- new_cond = LEU;
- break;
- case GT:
- new_cond = GTU;
- break;
- case LT:
- new_cond = LTU;
- break;
- default:
- return;
- }
-
-#if DEBUG0
- fprintf (stderr, "\033[38;5;129mrl78_expand_compare\n");
- debug_rtx (operands[0]);
- fprintf (stderr, "\033[0m");
-#endif
-
- mode = GET_MODE (operands[1]);
- if (mode == VOIDmode)
- mode = GET_MODE (operands[2]);
- high_bit = GEN_INT (~0 << (GET_MODE_BITSIZE (mode) - 1));
-
- /* 0: conditional 1,2: operands */
- for (i = 1; i <= 2; i ++)
- {
- rtx r = operands[i];
-
- if (GET_CODE (r) == CONST_INT)
- r = GEN_INT (INTVAL (r) ^ INTVAL (high_bit));
- else
- {
- r = gen_rtx_PLUS (mode, operands[i], high_bit);
- r = copy_to_mode_reg (mode, r);
- }
- operands[i] = r;
- }
-
- operands[0] = gen_rtx_fmt_ee (new_cond, GET_MODE (operands[0]), operands[1], operands[2]);
-
-#if DEBUG0
- fprintf (stderr, "\033[38;5;142mrl78_expand_compare\n");
- debug_rtx (operands[0]);
- fprintf (stderr, "\033[0m");
-#endif
+ if (GET_CODE (operands[2]) == MEM)
+ operands[2] = copy_to_mode_reg (GET_MODE (operands[2]), operands[2]);
}
@@ -1473,10 +1617,10 @@ rl78_peep_movhi_p (rtx *operands)
#if DEBUG_PEEP
fprintf (stderr, "\033[33m");
- debug_rtx(operands[0]);
- debug_rtx(operands[1]);
- debug_rtx(operands[2]);
- debug_rtx(operands[3]);
+ debug_rtx (operands[0]);
+ debug_rtx (operands[1]);
+ debug_rtx (operands[2]);
+ debug_rtx (operands[3]);
fprintf (stderr, "\033[0m");
#endif
@@ -1662,14 +1806,242 @@ re-run regmove, but that has not yet been attempted.
*/
#define DEBUG_ALLOC 0
+/* This array is used to hold knowledge about the contents of the
+ real registers (A ... H), the memory-based registers (r8 ... r31)
+ and the first NUM_STACK_LOCS words on the stack. We use this to
+ avoid generating redundant move instructions.
+
+ A value in the range 0 .. 31 indicates register A .. r31.
+ A value in the range 32 .. 63 indicates stack slot (value - 32).
+ A value of NOT_KNOWN indicates that the contents of that location
+ are not known. */
+
+#define NUM_STACK_LOCS 32
+#define NOT_KNOWN 127
+
+static unsigned char content_memory [32 + NUM_STACK_LOCS];
+
+static unsigned char saved_update_index = NOT_KNOWN;
+static unsigned char saved_update_value;
+static enum machine_mode saved_update_mode;
+
+
+static inline void
+clear_content_memory (void)
+{
+ memset (content_memory, NOT_KNOWN, sizeof content_memory);
+ if (dump_file)
+ fprintf (dump_file, " clear content memory\n");
+ saved_update_index = NOT_KNOWN;
+}
+
+/* Convert LOC into an index into the content_memory array.
+ If LOC cannot be converted, return NOT_KNOWN. */
+
+static unsigned char
+get_content_index (rtx loc)
+{
+ enum machine_mode mode;
+
+ if (loc == NULL_RTX)
+ return NOT_KNOWN;
+
+ if (REG_P (loc))
+ {
+ if (REGNO (loc) < 32)
+ return REGNO (loc);
+ return NOT_KNOWN;
+ }
+
+ mode = GET_MODE (loc);
+
+ if (! rl78_stack_based_mem (loc, mode))
+ return NOT_KNOWN;
+
+ loc = XEXP (loc, 0);
+
+ if (REG_P (loc))
+ /* loc = MEM (SP) */
+ return 32;
+
+ /* loc = MEM (PLUS (SP, INT)). */
+ loc = XEXP (loc, 1);
+
+ if (INTVAL (loc) < NUM_STACK_LOCS)
+ return 32 + INTVAL (loc);
+
+ return NOT_KNOWN;
+}
+
+/* Return a string describing content INDEX in mode MODE.
+ WARNING: Can return a pointer to a static buffer. */
+
+static const char *
+get_content_name (unsigned char index, enum machine_mode mode)
+{
+ static char buffer [128];
+
+ if (index == NOT_KNOWN)
+ return "Unknown";
+
+ if (index > 31)
+ sprintf (buffer, "stack slot %d", index - 32);
+ else if (mode == HImode)
+ sprintf (buffer, "%s%s",
+ reg_names [index + 1], reg_names [index]);
+ else
+ return reg_names [index];
+
+ return buffer;
+}
+
+#if DEBUG_ALLOC
+
+static void
+display_content_memory (FILE * file)
+{
+ unsigned int i;
+
+ fprintf (file, " Known memory contents:\n");
+
+ for (i = 0; i < sizeof content_memory; i++)
+ if (content_memory[i] != NOT_KNOWN)
+ {
+ fprintf (file, " %s contains a copy of ", get_content_name (i, QImode));
+ fprintf (file, "%s\n", get_content_name (content_memory [i], QImode));
+ }
+}
+#endif
+
+static void
+update_content (unsigned char index, unsigned char val, enum machine_mode mode)
+{
+ unsigned int i;
+
+ gcc_assert (index < sizeof content_memory);
+
+ content_memory [index] = val;
+ if (val != NOT_KNOWN)
+ content_memory [val] = index;
+
+ /* Make the entry in dump_file *before* VAL is increased below. */
+ if (dump_file)
+ {
+ fprintf (dump_file, " %s now contains ", get_content_name (index, mode));
+ if (val == NOT_KNOWN)
+ fprintf (dump_file, "Unknown\n");
+ else
+ fprintf (dump_file, "%s and vice versa\n", get_content_name (val, mode));
+ }
+
+ if (mode == HImode)
+ {
+ val = val == NOT_KNOWN ? val : val + 1;
+
+ content_memory [index + 1] = val;
+ if (val != NOT_KNOWN)
+ {
+ content_memory [val] = index + 1;
+ -- val;
+ }
+ }
+
+ /* Any other places that had INDEX recorded as their contents are now invalid. */
+ for (i = 0; i < sizeof content_memory; i++)
+ {
+ if (i == index
+ || (val != NOT_KNOWN && i == val))
+ {
+ if (mode == HImode)
+ ++ i;
+ continue;
+ }
+
+ if (content_memory[i] == index
+ || (val != NOT_KNOWN && content_memory[i] == val))
+ {
+ content_memory[i] = NOT_KNOWN;
+
+ if (dump_file)
+ fprintf (dump_file, " %s cleared\n", get_content_name (i, mode));
+
+ if (mode == HImode)
+ content_memory[++ i] = NOT_KNOWN;
+ }
+ }
+}
+
+/* Record that LOC contains VALUE.
+ For HImode locations record that LOC+1 contains VALUE+1.
+ If LOC is not a register or stack slot, do nothing.
+ If VALUE is not a register or stack slot, clear the recorded content. */
+
+static void
+record_content (rtx loc, rtx value)
+{
+ enum machine_mode mode;
+ unsigned char index;
+ unsigned char val;
+
+ if ((index = get_content_index (loc)) == NOT_KNOWN)
+ return;
+
+ val = get_content_index (value);
+
+ mode = GET_MODE (loc);
+
+ if (val == index)
+ {
+ if (! optimize)
+ return;
+
+ /* This should not happen when optimizing. */
+#if 1
+ fprintf (stderr, "ASSIGNMENT of location to itself detected! [%s]\n",
+ get_content_name (val, mode));
+ return;
+#else
+ gcc_unreachable ();
+#endif
+ }
+
+ update_content (index, val, mode);
+}
+
+/* Returns TRUE if LOC already contains a copy of VALUE. */
+
+static bool
+already_contains (rtx loc, rtx value)
+{
+ unsigned char index;
+ unsigned char val;
+
+ if ((index = get_content_index (loc)) == NOT_KNOWN)
+ return false;
+
+ if ((val = get_content_index (value)) == NOT_KNOWN)
+ return false;
+
+ if (content_memory [index] != val)
+ return false;
+
+ if (GET_MODE (loc) == HImode)
+ return content_memory [index + 1] == val + 1;
+
+ return true;
+}
+
/* Rescans an insn to see if it's recognized again. This is done
carefully to ensure that all the constraint information is accurate
for the newly matched insn. */
static bool
insn_ok_now (rtx insn)
{
+ rtx pattern = PATTERN (insn);
+
INSN_CODE (insn) = -1;
- if (recog (PATTERN (insn), insn, 0) > -1)
+
+ if (recog (pattern, insn, 0) > -1)
{
extract_insn (insn);
if (constrain_operands (1))
@@ -1679,15 +2051,34 @@ insn_ok_now (rtx insn)
debug_rtx (insn);
fprintf (stderr, "\033[0m");
#endif
+ if (SET_P (pattern))
+ record_content (SET_DEST (pattern), SET_SRC (pattern));
+
return true;
}
}
else
{
- fprintf (stderr, "\033[41;30m Unrecognized insn \033[0m\n");
+ /* We need to re-recog the insn with virtual registers to get
+ the operands */
+ cfun->machine->virt_insns_ok = 1;
+ if (recog (pattern, insn, 0) > -1)
+ {
+ extract_insn (insn);
+ if (constrain_operands (0))
+ {
+ cfun->machine->virt_insns_ok = 0;
+ return false;
+ }
+ }
+
+#if DEBUG_ALLOC
+ fprintf (stderr, "\033[41;30m Unrecognized *virtual* insn \033[0m\n");
debug_rtx (insn);
+#endif
gcc_unreachable ();
}
+
#if DEBUG_ALLOC
fprintf (stderr, "\033[31m");
debug_rtx (insn);
@@ -1697,15 +2088,15 @@ insn_ok_now (rtx insn)
}
#if DEBUG_ALLOC
-#define WORKED fprintf (stderr, "\033[48;5;22m Worked at line %d \033[0m\n", __LINE__)
+#define WORKED fprintf (stderr, "\033[48;5;22m Worked at line %d \033[0m\n", __LINE__)
#define FAILEDSOFAR fprintf (stderr, "\033[48;5;52m FAILED at line %d \033[0m\n", __LINE__)
-#define FAILED fprintf (stderr, "\033[48;5;52m FAILED at line %d \033[0m\n", __LINE__), gcc_unreachable()
+#define FAILED fprintf (stderr, "\033[48;5;52m FAILED at line %d \033[0m\n", __LINE__), gcc_unreachable()
#define MAYBE_OK(insn) if (insn_ok_now (insn)) { WORKED; return; } else { FAILEDSOFAR; }
+#define MUST_BE_OK(insn) if (insn_ok_now (insn)) { WORKED; return; } FAILED
#else
-#define WORKED
-#define FAILEDSOFAR
#define FAILED gcc_unreachable ()
#define MAYBE_OK(insn) if (insn_ok_now (insn)) return;
+#define MUST_BE_OK(insn) if (insn_ok_now (insn)) return; FAILED
#endif
/* Registers into which we move the contents of virtual registers. */
@@ -1787,16 +2178,95 @@ rl78_hi8 (rtx addr)
return rl78_subreg (QImode, addr, SImode, 2);
}
-/* Copy any register values into real registers and return an RTX for
- the same memory, now addressed by real registers. Any needed insns
- are emitted before BEFORE. */
+static void
+add_postponed_content_update (rtx to, rtx value)
+{
+ unsigned char index;
+
+ if ((index = get_content_index (to)) == NOT_KNOWN)
+ return;
+
+ gcc_assert (saved_update_index == NOT_KNOWN);
+ saved_update_index = index;
+ saved_update_value = get_content_index (value);
+ saved_update_mode = GET_MODE (to);
+}
+
+static void
+process_postponed_content_update (void)
+{
+ if (saved_update_index != NOT_KNOWN)
+ {
+ update_content (saved_update_index, saved_update_value, saved_update_mode);
+ saved_update_index = NOT_KNOWN;
+ }
+}
+
+/* Generate and emit a move of (register) FROM into TO. if WHERE is not NULL
+ then if BEFORE is true then emit the insn before WHERE, otherwise emit it
+ after WHERE. If TO already contains FROM then do nothing. Returns TO if
+ BEFORE is true, FROM otherwise. */
+static rtx
+gen_and_emit_move (rtx to, rtx from, rtx where, bool before)
+{
+ enum machine_mode mode = GET_MODE (to);
+
+ if (optimize && before && already_contains (to, from))
+ {
+#if DEBUG_ALLOC
+ display_content_memory (stderr);
+#endif
+ if (dump_file)
+ {
+ fprintf (dump_file, " Omit move of %s into ",
+ get_content_name (get_content_index (from), mode));
+ fprintf (dump_file, "%s as it already contains this value\n",
+ get_content_name (get_content_index (to), mode));
+ }
+ }
+ else
+ {
+ rtx move = mode == QImode ? gen_movqi (to, from) : gen_movhi (to, from);
+
+ EM (move);
+
+ if (where == NULL_RTX)
+ emit_insn (move);
+ else if (before)
+ emit_insn_before (move, where);
+ else
+ {
+ rtx note = find_reg_note (where, REG_EH_REGION, NULL_RTX);
+
+ /* If necessary move REG_EH_REGION notes forward.
+ cf. compiling gcc.dg/pr44545.c. */
+ if (note != NULL_RTX)
+ {
+ add_reg_note (move, REG_EH_REGION, XEXP (note, 0));
+ remove_note (where, note);
+ }
+
+ emit_insn_after (move, where);
+ }
+
+ if (before)
+ record_content (to, from);
+ else
+ add_postponed_content_update (to, from);
+ }
+ return before ? to : from;
+}
+
+/* If M is MEM(REG) or MEM(PLUS(REG,INT)) and REG is virtual then
+ copy it into NEWBASE and return the updated MEM. Otherwise just
+ return M. Any needed insns are emitted before BEFORE. */
static rtx
transcode_memory_rtx (rtx m, rtx newbase, rtx before)
{
rtx base, index, addendr;
int addend = 0;
- if (GET_CODE (m) != MEM)
+ if (! MEM_P (m))
return m;
if (GET_MODE (XEXP (m, 0)) == SImode)
@@ -1806,16 +2276,18 @@ transcode_memory_rtx (rtx m, rtx newbase, rtx before)
fprintf (stderr, "setting ES:\n");
debug_rtx(seg);
#endif
- emit_insn_before (EM(gen_movqi (A, seg)), before);
- emit_insn_before (EM(gen_movqi_es (A)), before);
+ emit_insn_before (EM (gen_movqi (A, seg)), before);
+ emit_insn_before (EM (gen_movqi_es (A)), before);
+ record_content (A, NULL_RTX);
+
m = change_address (m, GET_MODE (m), rl78_lo16 (XEXP (m, 0)));
}
- characterize_address (XEXP (m, 0), &base, &index, &addendr);
+ characterize_address (XEXP (m, 0), & base, & index, & addendr);
gcc_assert (index == NULL_RTX);
#if DEBUG_ALLOC
- fprintf (stderr, "\033[33m"); debug_rtx(m); fprintf (stderr, "\033[0m");
+ fprintf (stderr, "\033[33m"); debug_rtx (m); fprintf (stderr, "\033[0m");
debug_rtx (base);
#endif
if (base == NULL_RTX)
@@ -1824,6 +2296,9 @@ transcode_memory_rtx (rtx m, rtx newbase, rtx before)
if (addendr && GET_CODE (addendr) == CONST_INT)
addend = INTVAL (addendr);
+ gcc_assert (REG_P (base));
+ gcc_assert (REG_P (newbase));
+
if (REGNO (base) == SP_REG)
{
if (addend >= 0 && addend <= 255)
@@ -1844,17 +2319,22 @@ transcode_memory_rtx (rtx m, rtx newbase, rtx before)
EM (emit_insn_before (gen_movhi (AX, base), before));
EM (emit_insn_before (gen_addhi3 (AX, AX, addendr), before));
EM (emit_insn_before (gen_movhi (newbase, AX), before));
+ record_content (AX, NULL_RTX);
+ record_content (newbase, NULL_RTX);
+
base = newbase;
addend = 0;
}
else
{
- EM (emit_insn_before (gen_movhi (newbase, base), before));
- base = newbase;
+ base = gen_and_emit_move (newbase, base, before, true);
}
if (addend)
- base = gen_rtx_PLUS (HImode, base, GEN_INT (addend));
+ {
+ record_content (base, NULL_RTX);
+ base = gen_rtx_PLUS (HImode, base, GEN_INT (addend));
+ }
#if DEBUG_ALLOC
fprintf (stderr, "\033[33m");
@@ -1874,49 +2354,48 @@ transcode_memory_rtx (rtx m, rtx newbase, rtx before)
static rtx
move_to_acc (int opno, rtx before)
{
- rtx src = OP(opno);
+ rtx src = OP (opno);
enum machine_mode mode = GET_MODE (src);
- if (GET_CODE (src) == REG
- && REGNO (src) < 2)
+ if (REG_P (src) && REGNO (src) < 2)
return src;
if (mode == VOIDmode)
mode = recog_data.operand_mode[opno];
- if (mode == QImode)
- {
- EM (emit_insn_before (gen_movqi (A, src), before));
- return A;
- }
- else
- {
- EM (emit_insn_before (gen_movhi (AX, src), before));
- return AX;
- }
+ return gen_and_emit_move (mode == QImode ? A : AX, src, before, true);
+}
+
+static void
+force_into_acc (rtx src, rtx before)
+{
+ enum machine_mode mode = GET_MODE (src);
+ rtx move;
+
+ if (REG_P (src) && REGNO (src) < 2)
+ return;
+
+ move = mode == QImode ? gen_movqi (A, src) : gen_movhi (AX, src);
+
+ EM (move);
+
+ emit_insn_before (move, before);
+ record_content (AX, NULL_RTX);
}
/* Copy accumulator (A or AX) to DEST, placing any generated insns
after AFTER. Returns accumulator RTX. */
static rtx
-move_from_acc (rtx dest, rtx after)
+move_from_acc (unsigned int opno, rtx after)
{
+ rtx dest = OP (opno);
enum machine_mode mode = GET_MODE (dest);
if (REG_P (dest) && REGNO (dest) < 2)
return dest;
- if (mode == QImode)
- {
- EM (emit_insn_after (gen_movqi (dest, A), after));
- return A;
- }
- else
- {
- EM (emit_insn_after (gen_movhi (dest, AX), after));
- return AX;
- }
+ return gen_and_emit_move (dest, mode == QImode ? A : AX, after, false);
}
/* Copy accumulator (A or AX) to REGNO, placing any generated insns
@@ -1930,16 +2409,7 @@ move_acc_to_reg (rtx acc, int regno, rtx before)
reg = gen_rtx_REG (mode, regno);
- if (mode == QImode)
- {
- EM (emit_insn_before (gen_movqi (reg, A), before));
- return reg;
- }
- else
- {
- EM (emit_insn_before (gen_movhi (reg, AX), before));
- return reg;
- }
+ return gen_and_emit_move (reg, acc, before, true);
}
/* Copy SRC to X, placing any generated insns before BEFORE.
@@ -1948,7 +2418,7 @@ move_acc_to_reg (rtx acc, int regno, rtx before)
static rtx
move_to_x (int opno, rtx before)
{
- rtx src = OP(opno);
+ rtx src = OP (opno);
enum machine_mode mode = GET_MODE (src);
rtx reg;
@@ -1958,17 +2428,12 @@ move_to_x (int opno, rtx before)
if (mode == QImode || ! is_virtual_register (OP (opno)))
{
- OP(opno) = move_to_acc (opno, before);
- OP(opno) = move_acc_to_reg (OP(opno), X_REG, before);
+ OP (opno) = move_to_acc (opno, before);
+ OP (opno) = move_acc_to_reg (OP(opno), X_REG, before);
return reg;
}
- if (mode == QImode)
- EM (emit_insn_before (gen_movqi (reg, src), before));
- else
- EM (emit_insn_before (gen_movhi (reg, src), before));
-
- return reg;
+ return gen_and_emit_move (reg, src, before, true);
}
/* Copy OP(opno) to H or HL, placing any generated insns before BEFORE.
@@ -1992,12 +2457,7 @@ move_to_hl (int opno, rtx before)
return reg;
}
- if (mode == QImode)
- EM (emit_insn_before (gen_movqi (reg, src), before));
- else
- EM (emit_insn_before (gen_movhi (reg, src), before));
-
- return reg;
+ return gen_and_emit_move (reg, src, before, true);
}
/* Copy OP(opno) to E or DE, placing any generated insns before BEFORE.
@@ -2022,9 +2482,7 @@ move_to_de (int opno, rtx before)
}
else
{
- rtx move = mode == QImode ? gen_movqi (reg, src) : gen_movhi (reg, src);
-
- EM (emit_insn_before (move, before));
+ gen_and_emit_move (reg, src, before, true);
}
return reg;
@@ -2038,63 +2496,104 @@ rl78_alloc_physical_registers_op1 (rtx insn)
/* We first try using A as the destination, then copying it
back. */
- if (rtx_equal_p (OP(0), OP(1)))
+ if (rtx_equal_p (OP (0), OP (1)))
{
- OP(0) =
- OP(1) = transcode_memory_rtx (OP(1), DE, insn);
+ OP (0) =
+ OP (1) = transcode_memory_rtx (OP (1), DE, insn);
}
else
{
- OP(0) = transcode_memory_rtx (OP(0), BC, insn);
- OP(1) = transcode_memory_rtx (OP(1), HL, insn);
+ /* If necessary, load the operands into BC and HL.
+ Check to see if we already have OP (0) in HL
+ and if so, swap the order. */
+ if (MEM_P (OP (0))
+ && already_contains (HL, XEXP (OP (0), 0)))
+ {
+ OP (0) = transcode_memory_rtx (OP (0), HL, insn);
+ OP (1) = transcode_memory_rtx (OP (1), BC, insn);
+ }
+ else
+ {
+ OP (0) = transcode_memory_rtx (OP (0), BC, insn);
+ OP (1) = transcode_memory_rtx (OP (1), HL, insn);
+ }
}
MAYBE_OK (insn);
- OP(0) = move_from_acc (OP(0), insn);
+ OP (0) = move_from_acc (0, insn);
MAYBE_OK (insn);
/* Try copying the src to acc first, then. This is for, for
example, ZERO_EXTEND or NOT. */
- OP(1) = move_to_acc (1, insn);
+ OP (1) = move_to_acc (1, insn);
- MAYBE_OK (insn);
+ MUST_BE_OK (insn);
+}
+
+/* Returns true if operand OPNUM contains a constraint of type CONSTRAINT.
+ Assumes that the current insn has already been recognised and hence the
+ constraint data has been filled in. */
+static bool
+has_constraint (unsigned int opnum, enum constraint_num constraint)
+{
+ const char * p = recog_data.constraints[opnum];
+
+ /* No constraints means anything is accepted. */
+ if (p == NULL || *p == 0 || *p == ',')
+ return true;
+
+ do
+ {
+ char c;
+ unsigned int len;
- FAILED;
+ c = *p;
+ len = CONSTRAINT_LEN (c, p);
+ gcc_assert (len > 0);
+
+ switch (c)
+ {
+ case 0:
+ case ',':
+ return false;
+ default:
+ if (lookup_constraint (p) == constraint)
+ return true;
+ }
+ p += len;
+ }
+ while (1);
}
-/* Devirtualize an insn of the form (SET (op) (unop (op) (op))). */
+/* Devirtualize an insn of the form (SET (op) (binop (op) (op))). */
static void
rl78_alloc_physical_registers_op2 (rtx insn)
{
- /* op[0] = op[1] func op[2] */
- rtx prev = prev_nonnote_nondebug_insn (insn);
+ rtx prev;
rtx first;
bool hl_used;
+ int tmp_id;
+ rtx saved_op1;
- if (rtx_equal_p (OP(0), OP(1)))
+ if (rtx_equal_p (OP (0), OP (1)))
{
- OP(0) =
- OP(1) = transcode_memory_rtx (OP(1), DE, insn);
- prev = next_nonnote_nondebug_insn (prev);
- OP(2) = transcode_memory_rtx (OP(2), HL, insn);
- prev = prev_nonnote_nondebug_insn (prev);
+ OP (0) =
+ OP (1) = transcode_memory_rtx (OP (1), DE, insn);
+ OP (2) = transcode_memory_rtx (OP (2), HL, insn);
}
- else if (rtx_equal_p (OP(0), OP(2)))
+ else if (rtx_equal_p (OP (0), OP (2)))
{
- OP(1) = transcode_memory_rtx (OP(1), DE, insn);
- prev = next_nonnote_nondebug_insn (prev);
- OP(0) =
- OP(2) = transcode_memory_rtx (OP(2), HL, insn);
- prev = prev_nonnote_nondebug_insn (prev);
+ OP (1) = transcode_memory_rtx (OP (1), DE, insn);
+ OP (0) =
+ OP (2) = transcode_memory_rtx (OP (2), HL, insn);
}
else
{
- OP(0) = transcode_memory_rtx (OP(0), BC, insn);
- OP(1) = transcode_memory_rtx (OP(1), DE, insn);
- prev = next_nonnote_nondebug_insn (prev);
- OP(2) = transcode_memory_rtx (OP(2), HL, insn);
+ OP (0) = transcode_memory_rtx (OP (0), BC, insn);
+ OP (1) = transcode_memory_rtx (OP (1), DE, insn);
+ OP (2) = transcode_memory_rtx (OP (2), HL, insn);
}
MAYBE_OK (insn);
@@ -2110,17 +2609,106 @@ rl78_alloc_physical_registers_op2 (rtx insn)
OP (2) = tmp;
}
- /* Make a note of wether (H)L is being used. It matters
- because if OP(2) alsoneeds reloading, then we must take
+ /* Make a note of whether (H)L is being used. It matters
+ because if OP (2) alsoneeds reloading, then we must take
care not to corrupt HL. */
hl_used = reg_mentioned_p (L, OP (0)) || reg_mentioned_p (L, OP (1));
- OP(0) = move_from_acc (OP (0), insn);
- OP(1) = move_to_acc (1, insn);
+ /* If HL is not currently being used and dest == op1 then there are
+ some possible optimizations available by reloading one of the
+ operands into HL, before trying to use the accumulator. */
+ if (optimize
+ && ! hl_used
+ && rtx_equal_p (OP (0), OP (1)))
+ {
+ /* If op0 is a Ws1 type memory address then switching the base
+ address register to HL might allow us to perform an in-memory
+ operation. (eg for the INCW instruction).
+
+ FIXME: Adding the move into HL is costly if this optimization is not
+ going to work, so for now, make sure that we know that the new insn will
+ match the requirements of the addhi3_real pattern. Really we ought to
+ generate a candidate sequence, test that, and then install it if the
+ results are good. */
+ if (satisfies_constraint_Ws1 (OP (0))
+ && has_constraint (0, CONSTRAINT_Wh1)
+ && (satisfies_constraint_K (OP (2)) || satisfies_constraint_L (OP (2))))
+ {
+ rtx base, index, addend, newbase;
+
+ characterize_address (XEXP (OP (0), 0), & base, & index, & addend);
+ gcc_assert (index == NULL_RTX);
+ gcc_assert (REG_P (base) && REGNO (base) == SP_REG);
+
+ /* Ws1 addressing allows an offset of 0, Wh1 addressing requires a non-zero offset. */
+ if (addend != NULL_RTX)
+ {
+ newbase = gen_and_emit_move (HL, base, insn, true);
+ record_content (newbase, NULL_RTX);
+ newbase = gen_rtx_PLUS (HImode, newbase, addend);
+
+ OP (0) = OP (1) = change_address (OP (0), VOIDmode, newbase);
+
+ /* We do not want to fail here as this means that
+ we have inserted useless insns into the stream. */
+ MUST_BE_OK (insn);
+ }
+ }
+ else if (REG_P (OP (0))
+ && satisfies_constraint_Ws1 (OP (2))
+ && has_constraint (2, CONSTRAINT_Wh1))
+ {
+ rtx base, index, addend, newbase;
+
+ characterize_address (XEXP (OP (2), 0), & base, & index, & addend);
+ gcc_assert (index == NULL_RTX);
+ gcc_assert (REG_P (base) && REGNO (base) == SP_REG);
+
+ /* Ws1 addressing allows an offset of 0, Wh1 addressing requires a non-zero offset. */
+ if (addend != NULL_RTX)
+ {
+ gen_and_emit_move (HL, base, insn, true);
+
+ if (REGNO (OP (0)) != X_REG)
+ {
+ OP (1) = move_to_acc (1, insn);
+ OP (0) = move_from_acc (0, insn);
+ }
+
+ record_content (HL, NULL_RTX);
+ newbase = gen_rtx_PLUS (HImode, HL, addend);
+
+ OP (2) = change_address (OP (2), VOIDmode, newbase);
+
+ /* We do not want to fail here as this means that
+ we have inserted useless insns into the stream. */
+ MUST_BE_OK (insn);
+ }
+ }
+ }
+
+
+ OP (0) = move_from_acc (0, insn);
+
+ tmp_id = get_max_insn_count ();
+ saved_op1 = OP (1);
+
+ if (rtx_equal_p (OP (1), OP (2)))
+ OP (2) = OP (1) = move_to_acc (1, insn);
+ else
+ OP (1) = move_to_acc (1, insn);
MAYBE_OK (insn);
- /* We have to copy op2 to HL, but that involves AX, which
+ /* If we omitted the move of OP1 into the accumulator (because
+ it was already there from a previous insn), then force the
+ generation of the move instruction now. We know that we
+ are about to emit a move into HL (or DE) via AX, and hence
+ our optimization to remove the load of OP1 is no longer valid. */
+ if (tmp_id == get_max_insn_count ())
+ force_into_acc (saved_op1, insn);
+
+ /* We have to copy op2 to HL (or DE), but that involves AX, which
already has a live value. Emit it before those insns. */
if (prev)
@@ -2131,89 +2719,160 @@ rl78_alloc_physical_registers_op2 (rtx insn)
OP (2) = hl_used ? move_to_de (2, first) : move_to_hl (2, first);
- MAYBE_OK (insn);
-
- FAILED;
+ MUST_BE_OK (insn);
}
-/* Devirtualize an insn of the form (SET () (unop (op))). */
+/* Devirtualize an insn of the form SET (PC) (MEM/REG). */
static void
rl78_alloc_physical_registers_ro1 (rtx insn)
{
- /* (void) op[0] */
- OP(0) = transcode_memory_rtx (OP(0), BC, insn);
+ OP (0) = transcode_memory_rtx (OP (0), BC, insn);
MAYBE_OK (insn);
- OP(0) = move_to_acc (0, insn);
-
- MAYBE_OK (insn);
+ OP (0) = move_to_acc (0, insn);
- FAILED;
+ MUST_BE_OK (insn);
}
/* Devirtualize a compare insn. */
+
static void
rl78_alloc_physical_registers_cmp (rtx insn)
{
- /* op[1] cmp_op[0] op[2] */
+ int tmp_id;
+ rtx saved_op1;
rtx prev = prev_nonnote_nondebug_insn (insn);
rtx first;
- OP(1) = transcode_memory_rtx (OP(1), DE, insn);
- OP(2) = transcode_memory_rtx (OP(2), HL, insn);
+ OP (1) = transcode_memory_rtx (OP (1), DE, insn);
+ OP (2) = transcode_memory_rtx (OP (2), HL, insn);
+ /* HI compares have to have OP(1) in AX, but QI
+ compares do not, so it is worth checking here. */
MAYBE_OK (insn);
- OP(1) = move_to_acc (1, insn);
+ /* For an HImode compare, OP(1) must always be in AX.
+ But if OP(1) is a REG (and not AX), then we can avoid
+ a reload of OP(1) if we reload OP(2) into AX and invert
+ the comparison. */
+ if (REG_P (OP (1))
+ && REGNO (OP (1)) != AX_REG
+ && GET_MODE (OP (1)) == HImode
+ && MEM_P (OP (2)))
+ {
+ rtx cmp = XEXP (SET_SRC (PATTERN (insn)), 0);
+
+ OP (2) = move_to_acc (2, insn);
+
+ switch (GET_CODE (cmp))
+ {
+ case EQ:
+ case NE:
+ break;
+ case LTU: cmp = gen_rtx_GTU (HImode, OP (2), OP (1)); break;
+ case GTU: cmp = gen_rtx_LTU (HImode, OP (2), OP (1)); break;
+ case LEU: cmp = gen_rtx_GEU (HImode, OP (2), OP (1)); break;
+ case GEU: cmp = gen_rtx_LEU (HImode, OP (2), OP (1)); break;
+
+ case LT:
+ case GT:
+ case LE:
+ case GE:
+#if DEBUG_ALLOC
+ debug_rtx (insn);
+#endif
+ default:
+ gcc_unreachable ();
+ }
+
+ if (GET_CODE (cmp) == EQ || GET_CODE (cmp) == NE)
+ PATTERN (insn) = gen_cbranchhi4_real (cmp, OP (2), OP (1), OP (3));
+ else
+ PATTERN (insn) = gen_cbranchhi4_real_inverted (cmp, OP (2), OP (1), OP (3));
+
+ MUST_BE_OK (insn);
+ }
+
+ /* Surprisingly, gcc can generate a comparison of a register with itself, but this
+ should be handled by the second alternative of the cbranchhi_real pattern. */
+ if (rtx_equal_p (OP (1), OP (2)))
+ {
+ OP (1) = OP (2) = BC;
+ MUST_BE_OK (insn);
+ }
+
+ tmp_id = get_max_insn_count ();
+ saved_op1 = OP (1);
+
+ OP (1) = move_to_acc (1, insn);
MAYBE_OK (insn);
+ /* If we omitted the move of OP1 into the accumulator (because
+ it was already there from a previous insn), then force the
+ generation of the move instruction now. We know that we
+ are about to emit a move into HL via AX, and hence our
+ optimization to remove the load of OP1 is no longer valid. */
+ if (tmp_id == get_max_insn_count ())
+ force_into_acc (saved_op1, insn);
+
/* We have to copy op2 to HL, but that involves the acc, which
already has a live value. Emit it before those insns. */
-
if (prev)
first = next_nonnote_nondebug_insn (prev);
else
for (first = insn; prev_nonnote_nondebug_insn (first); first = prev_nonnote_nondebug_insn (first))
;
- OP(2) = move_to_hl (2, first);
+ OP (2) = move_to_hl (2, first);
- MAYBE_OK (insn);
-
- FAILED;
+ MUST_BE_OK (insn);
}
/* Like op2, but AX = A op X. */
+
static void
rl78_alloc_physical_registers_umul (rtx insn)
{
- /* op[0] = op[1] func op[2] */
rtx prev = prev_nonnote_nondebug_insn (insn);
rtx first;
+ int tmp_id;
+ rtx saved_op1;
- OP(0) = transcode_memory_rtx (OP(0), BC, insn);
- OP(1) = transcode_memory_rtx (OP(1), DE, insn);
- OP(2) = transcode_memory_rtx (OP(2), HL, insn);
+ OP (0) = transcode_memory_rtx (OP (0), BC, insn);
+ OP (1) = transcode_memory_rtx (OP (1), DE, insn);
+ OP (2) = transcode_memory_rtx (OP (2), HL, insn);
MAYBE_OK (insn);
if (recog_data.constraints[1][0] == '%'
- && is_virtual_register (OP(1))
- && !is_virtual_register (OP(2))
- && !CONSTANT_P (OP(2)))
+ && is_virtual_register (OP (1))
+ && !is_virtual_register (OP (2))
+ && !CONSTANT_P (OP (2)))
{
- rtx tmp = OP(1);
- OP(1) = OP(2);
- OP(2) = tmp;
+ rtx tmp = OP (1);
+ OP (1) = OP (2);
+ OP (2) = tmp;
}
- OP(0) = move_from_acc (OP(0), insn);
- OP(1) = move_to_acc (1, insn);
+ OP (0) = move_from_acc (0, insn);
+
+ tmp_id = get_max_insn_count ();
+ saved_op1 = OP (1);
+
+ OP (1) = move_to_acc (1, insn);
MAYBE_OK (insn);
+ /* If we omitted the move of OP1 into the accumulator (because
+ it was already there from a previous insn), then force the
+ generation of the move instruction now. We know that we
+ are about to emit a move into HL (or DE) via AX, and hence
+ our optimization to remove the load of OP1 is no longer valid. */
+ if (tmp_id == get_max_insn_count ())
+ force_into_acc (saved_op1, insn);
+
/* We have to copy op2 to X, but that involves the acc, which
already has a live value. Emit it before those insns. */
@@ -2222,11 +2881,65 @@ rl78_alloc_physical_registers_umul (rtx insn)
else
for (first = insn; prev_nonnote_nondebug_insn (first); first = prev_nonnote_nondebug_insn (first))
;
- OP(2) = move_to_x (2, first);
+ OP (2) = move_to_x (2, first);
+
+ MUST_BE_OK (insn);
+}
+
+static void
+rl78_alloc_address_registers_macax (rtx insn)
+{
+ int which, op;
+ bool replace_in_op0 = false;
+ bool replace_in_op1 = false;
MAYBE_OK (insn);
- FAILED;
+ /* Two different MEMs are not allowed. */
+ which = 0;
+ for (op = 2; op >= 0; op --)
+ {
+ if (MEM_P (OP (op)))
+ {
+ if (op == 0 && replace_in_op0)
+ continue;
+ if (op == 1 && replace_in_op1)
+ continue;
+
+ switch (which)
+ {
+ case 0:
+ /* If we replace a MEM, make sure that we replace it for all
+ occurrences of the same MEM in the insn. */
+ replace_in_op0 = (op > 0 && rtx_equal_p (OP (op), OP (0)));
+ replace_in_op1 = (op > 1 && rtx_equal_p (OP (op), OP (1)));
+
+ OP (op) = transcode_memory_rtx (OP (op), HL, insn);
+ if (op == 2
+ && MEM_P (OP (op))
+ && (REGNO (XEXP (OP (op), 0)) == SP_REG
+ || (GET_CODE (XEXP (OP (op), 0)) == PLUS
+ && REGNO (XEXP (XEXP (OP (op), 0), 0)) == SP_REG)))
+ {
+ emit_insn_before (gen_movhi (HL, gen_rtx_REG (HImode, SP_REG)), insn);
+ OP (op) = replace_rtx (OP (op), gen_rtx_REG (HImode, SP_REG), HL);
+ }
+ if (replace_in_op0)
+ OP (0) = OP (op);
+ if (replace_in_op1)
+ OP (1) = OP (op);
+ break;
+ case 1:
+ OP (op) = transcode_memory_rtx (OP (op), DE, insn);
+ break;
+ case 2:
+ OP (op) = transcode_memory_rtx (OP (op), BC, insn);
+ break;
+ }
+ which ++;
+ }
+ }
+ MUST_BE_OK (insn);
}
/* Scan all insns and devirtualize them. */
@@ -2266,23 +2979,46 @@ rl78_alloc_physical_registers (void)
cfun->machine->virt_insns_ok = 0;
cfun->machine->real_insns_ok = 1;
+ clear_content_memory ();
+
for (insn = get_insns (); insn; insn = curr)
{
+ rtx pattern;
+
curr = insn ? next_nonnote_nondebug_insn (insn) : NULL;
if (!INSN_P (insn))
- continue;
- if (GET_CODE (PATTERN (insn)) != SET
- && GET_CODE (PATTERN (insn)) != CALL)
- continue;
+ {
+ if (LABEL_P (insn))
+ clear_content_memory ();
+
+ continue;
+ }
- if (GET_CODE (PATTERN (insn)) == SET
- && GET_CODE (SET_SRC (PATTERN (insn))) == ASM_OPERANDS)
+ if (dump_file)
+ fprintf (dump_file, "Converting insn %d\n", INSN_UID (insn));
+
+ pattern = PATTERN (insn);
+ if (GET_CODE (pattern) == PARALLEL)
+ pattern = XVECEXP (pattern, 0, 0);
+ if (JUMP_P (insn) || CALL_P (insn) || GET_CODE (pattern) == CALL)
+ clear_content_memory ();
+ if (GET_CODE (pattern) != SET
+ && GET_CODE (pattern) != CALL)
+ continue;
+ if (GET_CODE (SET_SRC (pattern)) == ASM_OPERANDS)
continue;
valloc_method = get_attr_valloc (insn);
- PATTERN (insn)= copy_rtx_if_shared (PATTERN (insn));
+ PATTERN (insn) = copy_rtx_if_shared (PATTERN (insn));
+
+ if (valloc_method == VALLOC_MACAX)
+ {
+ record_content (AX, NULL_RTX);
+ record_content (BC, NULL_RTX);
+ record_content (DE, NULL_RTX);
+ }
if (insn_ok_now (insn))
continue;
@@ -2312,9 +3048,18 @@ rl78_alloc_physical_registers (void)
rl78_alloc_physical_registers_umul (insn);
break;
case VALLOC_MACAX:
- /* Macro that clobbers AX */
+ /* Macro that clobbers AX. */
+ rl78_alloc_address_registers_macax (insn);
+ record_content (AX, NULL_RTX);
+ record_content (BC, NULL_RTX);
+ record_content (DE, NULL_RTX);
break;
}
+
+ if (JUMP_P (insn) || CALL_P (insn) || GET_CODE (pattern) == CALL)
+ clear_content_memory ();
+ else
+ process_postponed_content_update ();
}
#if DEBUG_ALLOC
fprintf (stderr, "\033[0m");
@@ -2426,7 +3171,7 @@ rl78_calculate_death_notes (void)
fprintf (dump_file, "\nDead:");
for (i = 0; i < FIRST_PSEUDO_REGISTER; i ++)
if (dead[i])
- fprintf(dump_file, " %s", reg_names[i]);
+ fprintf (dump_file, " %s", reg_names[i]);
fprintf (dump_file, "\n");
print_rtl_single (dump_file, insn);
}
@@ -2651,13 +3396,13 @@ rl78_propogate_register_origins (void)
}
}
- /* Special case - our ADDSI3 macro uses AX */
+ /* Special case - our ADDSI3 macro uses AX and sometimes BC. */
if (get_attr_valloc (insn) == VALLOC_MACAX)
{
if (dump_file)
- fprintf (dump_file, "Resetting origin of AX for macro.\n");
+ fprintf (dump_file, "Resetting origin of AX/BC for macro.\n");
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if (i <= 1 || origins[i] <= 1)
+ if (i <= 3 || origins[i] <= 3)
{
origins[i] = i;
age[i] = 0;
@@ -2712,13 +3457,15 @@ rl78_remove_unused_sets (void)
}
}
-#undef xTARGET_MACHINE_DEPENDENT_REORG
-#define xTARGET_MACHINE_DEPENDENT_REORG rl78_reorg
-
/* This is the top of the devritualization pass. */
static void
rl78_reorg (void)
{
+ /* split2 only happens when optimizing, but we need all movSIs to be
+ split now. */
+ if (optimize <= 0)
+ split_all_insns ();
+
rl78_alloc_physical_registers ();
if (dump_file)
@@ -2753,7 +3500,7 @@ rl78_reorg (void)
df_analyze ();
}
-#undef TARGET_RETURN_IN_MEMORY
+#undef TARGET_RETURN_IN_MEMORY
#define TARGET_RETURN_IN_MEMORY rl78_return_in_memory
static bool
@@ -2764,6 +3511,63 @@ rl78_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED)
}
+#undef TARGET_RTX_COSTS
+#define TARGET_RTX_COSTS rl78_rtx_costs
+
+static bool rl78_rtx_costs (rtx x,
+ int code,
+ int outer_code ATTRIBUTE_UNUSED,
+ int opno ATTRIBUTE_UNUSED,
+ int * total,
+ bool speed ATTRIBUTE_UNUSED)
+{
+ if (code == IF_THEN_ELSE)
+ return COSTS_N_INSNS (10);
+ if (GET_MODE (x) == SImode)
+ {
+ switch (code)
+ {
+ case MULT:
+ if (RL78_MUL_RL78)
+ *total = COSTS_N_INSNS (14);
+ else if (RL78_MUL_G13)
+ *total = COSTS_N_INSNS (29);
+ else
+ *total = COSTS_N_INSNS (500);
+ return true;
+ case PLUS:
+ *total = COSTS_N_INSNS (8);
+ return true;
+ case ASHIFT:
+ case ASHIFTRT:
+ case LSHIFTRT:
+ if (GET_CODE (XEXP (x, 1)) == CONST_INT)
+ {
+ switch (INTVAL (XEXP (x, 1)))
+ {
+ case 0: *total = COSTS_N_INSNS (0); break;
+ case 1: *total = COSTS_N_INSNS (6); break;
+ case 2: case 3: case 4: case 5: case 6: case 7:
+ *total = COSTS_N_INSNS (10); break;
+ case 8: *total = COSTS_N_INSNS (6); break;
+ case 9: case 10: case 11: case 12: case 13: case 14: case 15:
+ *total = COSTS_N_INSNS (10); break;
+ case 16: *total = COSTS_N_INSNS (3); break;
+ case 17: case 18: case 19: case 20: case 21: case 22: case 23:
+ *total = COSTS_N_INSNS (4); break;
+ case 24: *total = COSTS_N_INSNS (4); break;
+ case 25: case 26: case 27: case 28: case 29: case 30: case 31:
+ *total = COSTS_N_INSNS (5); break;
+ }
+ }
+ else
+ *total = COSTS_N_INSNS (10+4*16);
+ return true;
+ }
+ }
+ return false;
+}
+
#undef TARGET_UNWIND_WORD_MODE
#define TARGET_UNWIND_WORD_MODE rl78_unwind_word_mode
View Lorry Controller Status