| /* Generate code from machine description to emit insns as rtl. |
| Copyright (C) 1987-2020 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 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| |
| #include "bconfig.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "tm.h" |
| #include "rtl.h" |
| #include "errors.h" |
| #include "read-md.h" |
| #include "gensupport.h" |
| |
| |
| /* Data structure for recording the patterns of insns that have CLOBBERs. |
| We use this to output a function that adds these CLOBBERs to a |
| previously-allocated PARALLEL expression. */ |
| |
| struct clobber_pat |
| { |
| struct clobber_ent *insns; |
| rtx pattern; |
| int first_clobber; |
| struct clobber_pat *next; |
| int has_hard_reg; |
| } *clobber_list; |
| |
| /* Records one insn that uses the clobber list. */ |
| |
| struct clobber_ent |
| { |
| int code_number; /* Counts only insns. */ |
| struct clobber_ent *next; |
| }; |
| |
| static void output_peephole2_scratches (rtx); |
| |
| /* True for <X>_optab if that optab isn't allowed to fail. */ |
| static bool nofail_optabs[NUM_OPTABS]; |
| |
| static void |
| print_code (RTX_CODE code) |
| { |
| const char *p1; |
| for (p1 = GET_RTX_NAME (code); *p1; p1++) |
| putchar (TOUPPER (*p1)); |
| } |
| |
| static void |
| gen_rtx_scratch (rtx x, enum rtx_code subroutine_type) |
| { |
| if (subroutine_type == DEFINE_PEEPHOLE2) |
| { |
| printf ("operand%d", XINT (x, 0)); |
| } |
| else |
| { |
| printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); |
| } |
| } |
| |
| /* Print a C expression to construct an RTX just like X, |
| substituting any operand references appearing within. */ |
| |
| static void |
| gen_exp (rtx x, enum rtx_code subroutine_type, char *used, md_rtx_info *info) |
| { |
| RTX_CODE code; |
| int i; |
| int len; |
| const char *fmt; |
| const char *sep = ""; |
| |
| if (x == 0) |
| { |
| printf ("NULL_RTX"); |
| return; |
| } |
| |
| code = GET_CODE (x); |
| |
| switch (code) |
| { |
| case MATCH_OPERAND: |
| case MATCH_DUP: |
| if (used) |
| { |
| if (used[XINT (x, 0)]) |
| { |
| printf ("copy_rtx (operand%d)", XINT (x, 0)); |
| return; |
| } |
| used[XINT (x, 0)] = 1; |
| } |
| printf ("operand%d", XINT (x, 0)); |
| return; |
| |
| case MATCH_OP_DUP: |
| printf ("gen_rtx_fmt_"); |
| for (i = 0; i < XVECLEN (x, 1); i++) |
| printf ("e"); |
| printf (" (GET_CODE (operand%d), ", XINT (x, 0)); |
| if (GET_MODE (x) == VOIDmode) |
| printf ("GET_MODE (operand%d)", XINT (x, 0)); |
| else |
| printf ("%smode", GET_MODE_NAME (GET_MODE (x))); |
| for (i = 0; i < XVECLEN (x, 1); i++) |
| { |
| printf (",\n\t\t"); |
| gen_exp (XVECEXP (x, 1, i), subroutine_type, used, info); |
| } |
| printf (")"); |
| return; |
| |
| case MATCH_OPERATOR: |
| printf ("gen_rtx_fmt_"); |
| for (i = 0; i < XVECLEN (x, 2); i++) |
| printf ("e"); |
| printf (" (GET_CODE (operand%d)", XINT (x, 0)); |
| printf (", %smode", GET_MODE_NAME (GET_MODE (x))); |
| for (i = 0; i < XVECLEN (x, 2); i++) |
| { |
| printf (",\n\t\t"); |
| gen_exp (XVECEXP (x, 2, i), subroutine_type, used, info); |
| } |
| printf (")"); |
| return; |
| |
| case MATCH_PARALLEL: |
| case MATCH_PAR_DUP: |
| printf ("operand%d", XINT (x, 0)); |
| return; |
| |
| case MATCH_SCRATCH: |
| gen_rtx_scratch (x, subroutine_type); |
| return; |
| |
| case PC: |
| printf ("pc_rtx"); |
| return; |
| case RETURN: |
| printf ("ret_rtx"); |
| return; |
| case SIMPLE_RETURN: |
| printf ("simple_return_rtx"); |
| return; |
| case CLOBBER: |
| if (REG_P (XEXP (x, 0))) |
| { |
| printf ("gen_hard_reg_clobber (%smode, %i)", |
| GET_MODE_NAME (GET_MODE (XEXP (x, 0))), |
| REGNO (XEXP (x, 0))); |
| return; |
| } |
| break; |
| case CC0: |
| printf ("cc0_rtx"); |
| return; |
| |
| case CONST_INT: |
| if (INTVAL (x) == 0) |
| printf ("const0_rtx"); |
| else if (INTVAL (x) == 1) |
| printf ("const1_rtx"); |
| else if (INTVAL (x) == -1) |
| printf ("constm1_rtx"); |
| else if (-MAX_SAVED_CONST_INT <= INTVAL (x) |
| && INTVAL (x) <= MAX_SAVED_CONST_INT) |
| printf ("const_int_rtx[MAX_SAVED_CONST_INT + (%d)]", |
| (int) INTVAL (x)); |
| else if (INTVAL (x) == STORE_FLAG_VALUE) |
| printf ("const_true_rtx"); |
| else |
| { |
| printf ("GEN_INT ("); |
| printf (HOST_WIDE_INT_PRINT_DEC_C, INTVAL (x)); |
| printf (")"); |
| } |
| return; |
| |
| case CONST_DOUBLE: |
| case CONST_FIXED: |
| case CONST_WIDE_INT: |
| /* These shouldn't be written in MD files. Instead, the appropriate |
| routines in varasm.c should be called. */ |
| gcc_unreachable (); |
| |
| default: |
| break; |
| } |
| |
| printf ("gen_rtx_"); |
| print_code (code); |
| printf (" ("); |
| if (!always_void_p (code)) |
| { |
| printf ("%smode", GET_MODE_NAME (GET_MODE (x))); |
| sep = ",\n\t"; |
| } |
| |
| fmt = GET_RTX_FORMAT (code); |
| len = GET_RTX_LENGTH (code); |
| for (i = 0; i < len; i++) |
| { |
| if (fmt[i] == '0') |
| break; |
| fputs (sep, stdout); |
| switch (fmt[i]) |
| { |
| case 'e': case 'u': |
| gen_exp (XEXP (x, i), subroutine_type, used, info); |
| break; |
| |
| case 'i': |
| printf ("%u", XINT (x, i)); |
| break; |
| |
| case 'r': |
| printf ("%u", REGNO (x)); |
| break; |
| |
| case 'p': |
| /* We don't have a way of parsing polynomial offsets yet, |
| and hopefully never will. */ |
| printf ("%d", SUBREG_BYTE (x).to_constant ()); |
| break; |
| |
| case 's': |
| printf ("\"%s\"", XSTR (x, i)); |
| break; |
| |
| case 'E': |
| { |
| int j; |
| printf ("gen_rtvec (%d", XVECLEN (x, i)); |
| for (j = 0; j < XVECLEN (x, i); j++) |
| { |
| printf (",\n\t\t"); |
| gen_exp (XVECEXP (x, i, j), subroutine_type, used, info); |
| } |
| printf (")"); |
| break; |
| } |
| |
| default: |
| gcc_unreachable (); |
| } |
| sep = ",\n\t"; |
| } |
| printf (")"); |
| } |
| |
| /* Output code to emit the instruction patterns in VEC, with each element |
| becoming a separate instruction. USED is as for gen_exp. */ |
| |
| static void |
| gen_emit_seq (rtvec vec, char *used, md_rtx_info *info) |
| { |
| for (int i = 0, len = GET_NUM_ELEM (vec); i < len; ++i) |
| { |
| bool last_p = (i == len - 1); |
| rtx next = RTVEC_ELT (vec, i); |
| if (const char *name = get_emit_function (next)) |
| { |
| printf (" %s (", name); |
| gen_exp (next, DEFINE_EXPAND, used, info); |
| printf (");\n"); |
| if (!last_p && needs_barrier_p (next)) |
| printf (" emit_barrier ();"); |
| } |
| else |
| { |
| printf (" emit ("); |
| gen_exp (next, DEFINE_EXPAND, used, info); |
| printf (", %s);\n", last_p ? "false" : "true"); |
| } |
| } |
| } |
| |
| /* Emit the given C code to the output file. The code is allowed to |
| fail if CAN_FAIL_P. NAME describes what we're generating, |
| for use in error messages. */ |
| |
| static void |
| emit_c_code (const char *code, bool can_fail_p, const char *name) |
| { |
| if (can_fail_p) |
| printf ("#define FAIL return (end_sequence (), _val)\n"); |
| else |
| printf ("#define FAIL _Pragma (\"GCC error \\\"%s cannot FAIL\\\"\")" |
| " (void)0\n", name); |
| printf ("#define DONE return (_val = get_insns (), " |
| "end_sequence (), _val)\n"); |
| |
| rtx_reader_ptr->print_md_ptr_loc (code); |
| printf ("%s\n", code); |
| |
| printf ("#undef DONE\n"); |
| printf ("#undef FAIL\n"); |
| } |
| |
| /* Generate the `gen_...' function for a DEFINE_INSN. */ |
| |
| static void |
| gen_insn (md_rtx_info *info) |
| { |
| struct pattern_stats stats; |
| int i; |
| |
| /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) |
| registers or MATCH_SCRATCHes. If so, store away the information for |
| later. */ |
| |
| rtx insn = info->def; |
| if (XVEC (insn, 1)) |
| { |
| int has_hard_reg = 0; |
| |
| for (i = XVECLEN (insn, 1) - 1; i > 0; i--) |
| { |
| if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER) |
| break; |
| |
| if (REG_P (XEXP (XVECEXP (insn, 1, i), 0))) |
| has_hard_reg = 1; |
| else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH) |
| break; |
| } |
| |
| if (i != XVECLEN (insn, 1) - 1) |
| { |
| struct clobber_pat *p; |
| struct clobber_ent *link = XNEW (struct clobber_ent); |
| int j; |
| |
| link->code_number = info->index; |
| |
| /* See if any previous CLOBBER_LIST entry is the same as this |
| one. */ |
| |
| for (p = clobber_list; p; p = p->next) |
| { |
| if (p->first_clobber != i + 1 |
| || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) |
| continue; |
| |
| for (j = i + 1; j < XVECLEN (insn, 1); j++) |
| { |
| rtx old_rtx = XEXP (XVECEXP (p->pattern, 1, j), 0); |
| rtx new_rtx = XEXP (XVECEXP (insn, 1, j), 0); |
| |
| /* OLD and NEW_INSN are the same if both are to be a SCRATCH |
| of the same mode, |
| or if both are registers of the same mode and number. */ |
| if (! (GET_CODE (old_rtx) == GET_CODE (new_rtx) |
| && GET_MODE (old_rtx) == GET_MODE (new_rtx) |
| && ((GET_CODE (old_rtx) == MATCH_SCRATCH |
| && GET_CODE (new_rtx) == MATCH_SCRATCH) |
| || (REG_P (old_rtx) && REG_P (new_rtx) |
| && REGNO (old_rtx) == REGNO (new_rtx))))) |
| break; |
| } |
| |
| if (j == XVECLEN (insn, 1)) |
| break; |
| } |
| |
| if (p == 0) |
| { |
| p = XNEW (struct clobber_pat); |
| |
| p->insns = 0; |
| p->pattern = insn; |
| p->first_clobber = i + 1; |
| p->next = clobber_list; |
| p->has_hard_reg = has_hard_reg; |
| clobber_list = p; |
| } |
| |
| link->next = p->insns; |
| p->insns = link; |
| } |
| } |
| |
| /* Don't mention instructions whose names are the null string |
| or begin with '*'. They are in the machine description just |
| to be recognized. */ |
| if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') |
| return; |
| |
| printf ("/* %s:%d */\n", info->loc.filename, info->loc.lineno); |
| |
| /* Find out how many operands this function has. */ |
| get_pattern_stats (&stats, XVEC (insn, 1)); |
| if (stats.max_dup_opno > stats.max_opno) |
| fatal_at (info->loc, "match_dup operand number has no match_operand"); |
| |
| /* Output the function name and argument declarations. */ |
| printf ("rtx\ngen_%s (", XSTR (insn, 0)); |
| if (stats.num_generator_args) |
| for (i = 0; i < stats.num_generator_args; i++) |
| if (i) |
| printf (",\n\trtx operand%d ATTRIBUTE_UNUSED", i); |
| else |
| printf ("rtx operand%d ATTRIBUTE_UNUSED", i); |
| else |
| printf ("void"); |
| printf (")\n"); |
| printf ("{\n"); |
| |
| /* Output code to construct and return the rtl for the instruction body. */ |
| |
| rtx pattern = add_implicit_parallel (XVEC (insn, 1)); |
| /* ??? This is the traditional behavior, but seems suspect. */ |
| char *used = (XVECLEN (insn, 1) == 1 |
| ? NULL |
| : XCNEWVEC (char, stats.num_generator_args)); |
| printf (" return "); |
| gen_exp (pattern, DEFINE_INSN, used, info); |
| printf (";\n}\n\n"); |
| XDELETEVEC (used); |
| } |
| |
| /* Generate the `gen_...' function for a DEFINE_EXPAND. */ |
| |
| static void |
| gen_expand (md_rtx_info *info) |
| { |
| struct pattern_stats stats; |
| int i; |
| char *used; |
| |
| rtx expand = info->def; |
| if (strlen (XSTR (expand, 0)) == 0) |
| fatal_at (info->loc, "define_expand lacks a name"); |
| if (XVEC (expand, 1) == 0) |
| fatal_at (info->loc, "define_expand for %s lacks a pattern", |
| XSTR (expand, 0)); |
| |
| /* Find out how many operands this function has. */ |
| get_pattern_stats (&stats, XVEC (expand, 1)); |
| if (stats.min_scratch_opno != -1 |
| && stats.min_scratch_opno <= MAX (stats.max_opno, stats.max_dup_opno)) |
| fatal_at (info->loc, "define_expand for %s needs to have match_scratch " |
| "numbers above all other operands", XSTR (expand, 0)); |
| |
| /* Output the function name and argument declarations. */ |
| printf ("rtx\ngen_%s (", XSTR (expand, 0)); |
| if (stats.num_generator_args) |
| for (i = 0; i < stats.num_generator_args; i++) |
| if (i) |
| printf (",\n\trtx operand%d", i); |
| else |
| printf ("rtx operand%d", i); |
| else |
| printf ("void"); |
| printf (")\n"); |
| printf ("{\n"); |
| |
| /* If we don't have any C code to write, only one insn is being written, |
| and no MATCH_DUPs are present, we can just return the desired insn |
| like we do for a DEFINE_INSN. This saves memory. */ |
| if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') |
| && stats.max_opno >= stats.max_dup_opno |
| && XVECLEN (expand, 1) == 1) |
| { |
| printf (" return "); |
| gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL, info); |
| printf (";\n}\n\n"); |
| return; |
| } |
| |
| /* For each operand referred to only with MATCH_DUPs, |
| make a local variable. */ |
| for (i = stats.num_generator_args; i <= stats.max_dup_opno; i++) |
| printf (" rtx operand%d;\n", i); |
| printf (" rtx_insn *_val = 0;\n"); |
| printf (" start_sequence ();\n"); |
| |
| /* The fourth operand of DEFINE_EXPAND is some code to be executed |
| before the actual construction. |
| This code expects to refer to `operands' |
| just as the output-code in a DEFINE_INSN does, |
| but here `operands' is an automatic array. |
| So copy the operand values there before executing it. */ |
| if (XSTR (expand, 3) && *XSTR (expand, 3)) |
| { |
| printf (" {\n"); |
| if (stats.num_operand_vars > 0) |
| printf (" rtx operands[%d];\n", stats.num_operand_vars); |
| |
| /* Output code to copy the arguments into `operands'. */ |
| for (i = 0; i < stats.num_generator_args; i++) |
| printf (" operands[%d] = operand%d;\n", i, i); |
| |
| /* Output the special code to be executed before the sequence |
| is generated. */ |
| optab_pattern p; |
| bool can_fail_p = true; |
| if (find_optab (&p, XSTR (expand, 0))) |
| { |
| gcc_assert (p.op < NUM_OPTABS); |
| if (nofail_optabs[p.op]) |
| can_fail_p = false; |
| } |
| emit_c_code (XSTR (expand, 3), can_fail_p, XSTR (expand, 0)); |
| |
| /* Output code to copy the arguments back out of `operands' |
| (unless we aren't going to use them at all). */ |
| if (XVEC (expand, 1) != 0) |
| { |
| for (i = 0; i <= MAX (stats.max_opno, stats.max_dup_opno); i++) |
| { |
| printf (" operand%d = operands[%d];\n", i, i); |
| printf (" (void) operand%d;\n", i); |
| } |
| } |
| printf (" }\n"); |
| } |
| |
| used = XCNEWVEC (char, stats.num_operand_vars); |
| gen_emit_seq (XVEC (expand, 1), used, info); |
| XDELETEVEC (used); |
| |
| /* Call `get_insns' to extract the list of all the |
| insns emitted within this gen_... function. */ |
| |
| printf (" _val = get_insns ();\n"); |
| printf (" end_sequence ();\n"); |
| printf (" return _val;\n}\n\n"); |
| } |
| |
| /* Like gen_expand, but generates insns resulting from splitting SPLIT. */ |
| |
| static void |
| gen_split (md_rtx_info *info) |
| { |
| struct pattern_stats stats; |
| int i; |
| rtx split = info->def; |
| const char *const name = |
| ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split"); |
| const char *unused; |
| char *used; |
| |
| if (XVEC (split, 0) == 0) |
| fatal_at (info->loc, "%s lacks a pattern", |
| GET_RTX_NAME (GET_CODE (split))); |
| else if (XVEC (split, 2) == 0) |
| fatal_at (info->loc, "%s lacks a replacement pattern", |
| GET_RTX_NAME (GET_CODE (split))); |
| |
| /* Find out how many operands this function has. */ |
| |
| get_pattern_stats (&stats, XVEC (split, 2)); |
| unused = (stats.num_operand_vars == 0 ? " ATTRIBUTE_UNUSED" : ""); |
| used = XCNEWVEC (char, stats.num_operand_vars); |
| |
| /* Output the prototype, function name and argument declarations. */ |
| if (GET_CODE (split) == DEFINE_PEEPHOLE2) |
| { |
| printf ("extern rtx_insn *gen_%s_%d (rtx_insn *, rtx *);\n", |
| name, info->index); |
| printf ("rtx_insn *\ngen_%s_%d (rtx_insn *curr_insn ATTRIBUTE_UNUSED," |
| " rtx *operands%s)\n", |
| name, info->index, unused); |
| } |
| else |
| { |
| printf ("extern rtx_insn *gen_split_%d (rtx_insn *, rtx *);\n", |
| info->index); |
| printf ("rtx_insn *\ngen_split_%d " |
| "(rtx_insn *curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", |
| info->index, unused); |
| } |
| printf ("{\n"); |
| |
| /* Declare all local variables. */ |
| for (i = 0; i < stats.num_operand_vars; i++) |
| printf (" rtx operand%d;\n", i); |
| printf (" rtx_insn *_val = NULL;\n"); |
| |
| if (GET_CODE (split) == DEFINE_PEEPHOLE2) |
| output_peephole2_scratches (split); |
| |
| const char *fn = info->loc.filename; |
| for (const char *p = fn; *p; p++) |
| if (*p == '/') |
| fn = p + 1; |
| |
| printf (" if (dump_file)\n"); |
| printf (" fprintf (dump_file, \"Splitting with gen_%s_%d (%s:%d)\\n\");\n", |
| name, info->index, fn, info->loc.lineno); |
| |
| printf (" start_sequence ();\n"); |
| |
| /* The fourth operand of DEFINE_SPLIT is some code to be executed |
| before the actual construction. */ |
| |
| if (XSTR (split, 3)) |
| emit_c_code (XSTR (split, 3), true, name); |
| |
| /* Output code to copy the arguments back out of `operands' */ |
| for (i = 0; i < stats.num_operand_vars; i++) |
| { |
| printf (" operand%d = operands[%d];\n", i, i); |
| printf (" (void) operand%d;\n", i); |
| } |
| |
| gen_emit_seq (XVEC (split, 2), used, info); |
| |
| /* Call `get_insns' to make a list of all the |
| insns emitted within this gen_... function. */ |
| |
| printf (" _val = get_insns ();\n"); |
| printf (" end_sequence ();\n"); |
| printf (" return _val;\n}\n\n"); |
| |
| free (used); |
| } |
| |
| /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient |
| size for the insn and an INSN_CODE, and inserts the required CLOBBERs at |
| the end of the vector. */ |
| |
| static void |
| output_add_clobbers (md_rtx_info *info) |
| { |
| struct clobber_pat *clobber; |
| struct clobber_ent *ent; |
| int i; |
| |
| printf ("\n\nvoid\nadd_clobbers (rtx pattern ATTRIBUTE_UNUSED, int insn_code_number)\n"); |
| printf ("{\n"); |
| printf (" switch (insn_code_number)\n"); |
| printf (" {\n"); |
| |
| for (clobber = clobber_list; clobber; clobber = clobber->next) |
| { |
| for (ent = clobber->insns; ent; ent = ent->next) |
| printf (" case %d:\n", ent->code_number); |
| |
| for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) |
| { |
| printf (" XVECEXP (pattern, 0, %d) = ", i); |
| gen_exp (XVECEXP (clobber->pattern, 1, i), |
| GET_CODE (clobber->pattern), NULL, info); |
| printf (";\n"); |
| } |
| |
| printf (" break;\n\n"); |
| } |
| |
| printf (" default:\n"); |
| printf (" gcc_unreachable ();\n"); |
| printf (" }\n"); |
| printf ("}\n"); |
| } |
| |
| /* Write a function, `added_clobbers_hard_reg_p' that is given an insn_code |
| number that will have clobbers added (as indicated by `recog') and returns |
| 1 if those include a clobber of a hard reg or 0 if all of them just clobber |
| SCRATCH. */ |
| |
| static void |
| output_added_clobbers_hard_reg_p (void) |
| { |
| struct clobber_pat *clobber; |
| struct clobber_ent *ent; |
| int clobber_p, used; |
| |
| printf ("\n\nint\nadded_clobbers_hard_reg_p (int insn_code_number)\n"); |
| printf ("{\n"); |
| printf (" switch (insn_code_number)\n"); |
| printf (" {\n"); |
| |
| for (clobber_p = 0; clobber_p <= 1; clobber_p++) |
| { |
| used = 0; |
| for (clobber = clobber_list; clobber; clobber = clobber->next) |
| if (clobber->has_hard_reg == clobber_p) |
| for (ent = clobber->insns; ent; ent = ent->next) |
| { |
| printf (" case %d:\n", ent->code_number); |
| used++; |
| } |
| |
| if (used) |
| printf (" return %d;\n\n", clobber_p); |
| } |
| |
| printf (" default:\n"); |
| printf (" gcc_unreachable ();\n"); |
| printf (" }\n"); |
| printf ("}\n"); |
| } |
| |
| /* Generate code to invoke find_free_register () as needed for the |
| scratch registers used by the peephole2 pattern in SPLIT. */ |
| |
| static void |
| output_peephole2_scratches (rtx split) |
| { |
| int i; |
| int insn_nr = 0; |
| bool first = true; |
| |
| for (i = 0; i < XVECLEN (split, 0); i++) |
| { |
| rtx elt = XVECEXP (split, 0, i); |
| if (GET_CODE (elt) == MATCH_SCRATCH) |
| { |
| int last_insn_nr = insn_nr; |
| int cur_insn_nr = insn_nr; |
| int j; |
| for (j = i + 1; j < XVECLEN (split, 0); j++) |
| if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP) |
| { |
| if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0)) |
| last_insn_nr = cur_insn_nr; |
| } |
| else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH) |
| cur_insn_nr++; |
| |
| if (first) |
| { |
| printf (" HARD_REG_SET _regs_allocated;\n"); |
| printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); |
| first = false; |
| } |
| |
| printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\ |
| return NULL;\n", |
| XINT (elt, 0), |
| insn_nr, last_insn_nr, |
| XSTR (elt, 1), |
| GET_MODE_NAME (GET_MODE (elt))); |
| |
| } |
| else if (GET_CODE (elt) != MATCH_DUP) |
| insn_nr++; |
| } |
| } |
| |
| /* Print "arg<N>" parameter declarations for each argument N of ONAME. */ |
| |
| static void |
| print_overload_arguments (overloaded_name *oname) |
| { |
| for (unsigned int i = 0; i < oname->arg_types.length (); ++i) |
| printf ("%s%s arg%d", i == 0 ? "" : ", ", oname->arg_types[i], i); |
| } |
| |
| /* Print code to test whether INSTANCE should be chosen, given that |
| argument N of the overload is available as "arg<N>". */ |
| |
| static void |
| print_overload_test (overloaded_instance *instance) |
| { |
| for (unsigned int i = 0; i < instance->arg_values.length (); ++i) |
| printf ("%sarg%d == %s", i == 0 ? " if (" : "\n && ", |
| i, instance->arg_values[i]); |
| printf (")\n"); |
| } |
| |
| /* Emit a maybe_code_for_* function for ONAME. */ |
| |
| static void |
| handle_overloaded_code_for (overloaded_name *oname) |
| { |
| /* Print the function prototype. */ |
| printf ("\ninsn_code\nmaybe_code_for_%s (", oname->name); |
| print_overload_arguments (oname); |
| printf (")\n{\n"); |
| |
| /* Use a sequence of "if" statements for each instance. */ |
| for (overloaded_instance *instance = oname->first_instance; |
| instance; instance = instance->next) |
| { |
| print_overload_test (instance); |
| printf (" return CODE_FOR_%s;\n", instance->name); |
| } |
| |
| /* Return null if no match was found. */ |
| printf (" return CODE_FOR_nothing;\n}\n"); |
| } |
| |
| /* Emit a maybe_gen_* function for ONAME. */ |
| |
| static void |
| handle_overloaded_gen (overloaded_name *oname) |
| { |
| unsigned HOST_WIDE_INT seen = 0; |
| /* All patterns must have the same number of operands. */ |
| for (overloaded_instance *instance = oname->first_instance->next; |
| instance; instance = instance->next) |
| { |
| pattern_stats stats; |
| get_pattern_stats (&stats, XVEC (instance->insn, 1)); |
| unsigned HOST_WIDE_INT mask |
| = HOST_WIDE_INT_1U << stats.num_generator_args; |
| if (seen & mask) |
| continue; |
| |
| seen |= mask; |
| |
| /* Print the function prototype. */ |
| printf ("\nrtx\nmaybe_gen_%s (", oname->name); |
| print_overload_arguments (oname); |
| for (int i = 0; i < stats.num_generator_args; ++i) |
| printf (", rtx x%d", i); |
| printf (")\n{\n"); |
| |
| /* Use maybe_code_for_*, instead of duplicating the selection |
| logic here. */ |
| printf (" insn_code code = maybe_code_for_%s (", oname->name); |
| for (unsigned int i = 0; i < oname->arg_types.length (); ++i) |
| printf ("%sarg%d", i == 0 ? "" : ", ", i); |
| printf (");\n" |
| " if (code != CODE_FOR_nothing)\n" |
| " {\n" |
| " gcc_assert (insn_data[code].n_generator_args == %d);\n" |
| " return GEN_FCN (code) (", stats.num_generator_args); |
| for (int i = 0; i < stats.num_generator_args; ++i) |
| printf ("%sx%d", i == 0 ? "" : ", ", i); |
| printf (");\n" |
| " }\n" |
| " else\n" |
| " return NULL_RTX;\n" |
| "}\n"); |
| } |
| } |
| |
| int |
| main (int argc, const char **argv) |
| { |
| progname = "genemit"; |
| |
| if (!init_rtx_reader_args (argc, argv)) |
| return (FATAL_EXIT_CODE); |
| |
| #define DEF_INTERNAL_OPTAB_FN(NAME, FLAGS, OPTAB, TYPE) \ |
| nofail_optabs[OPTAB##_optab] = true; |
| #include "internal-fn.def" |
| |
| /* Assign sequential codes to all entries in the machine description |
| in parallel with the tables in insn-output.c. */ |
| |
| printf ("/* Generated automatically by the program `genemit'\n\ |
| from the machine description file `md'. */\n\n"); |
| |
| printf ("#define IN_TARGET_CODE 1\n"); |
| printf ("#include \"config.h\"\n"); |
| printf ("#include \"system.h\"\n"); |
| printf ("#include \"coretypes.h\"\n"); |
| printf ("#include \"backend.h\"\n"); |
| printf ("#include \"predict.h\"\n"); |
| printf ("#include \"tree.h\"\n"); |
| printf ("#include \"rtl.h\"\n"); |
| printf ("#include \"alias.h\"\n"); |
| printf ("#include \"varasm.h\"\n"); |
| printf ("#include \"stor-layout.h\"\n"); |
| printf ("#include \"calls.h\"\n"); |
| printf ("#include \"memmodel.h\"\n"); |
| printf ("#include \"tm_p.h\"\n"); |
| printf ("#include \"flags.h\"\n"); |
| printf ("#include \"insn-config.h\"\n"); |
| printf ("#include \"expmed.h\"\n"); |
| printf ("#include \"dojump.h\"\n"); |
| printf ("#include \"explow.h\"\n"); |
| printf ("#include \"emit-rtl.h\"\n"); |
| printf ("#include \"stmt.h\"\n"); |
| printf ("#include \"expr.h\"\n"); |
| printf ("#include \"insn-codes.h\"\n"); |
| printf ("#include \"optabs.h\"\n"); |
| printf ("#include \"dfp.h\"\n"); |
| printf ("#include \"output.h\"\n"); |
| printf ("#include \"recog.h\"\n"); |
| printf ("#include \"df.h\"\n"); |
| printf ("#include \"resource.h\"\n"); |
| printf ("#include \"reload.h\"\n"); |
| printf ("#include \"diagnostic-core.h\"\n"); |
| printf ("#include \"regs.h\"\n"); |
| printf ("#include \"tm-constrs.h\"\n"); |
| printf ("#include \"ggc.h\"\n"); |
| printf ("#include \"target.h\"\n\n"); |
| |
| /* Read the machine description. */ |
| |
| md_rtx_info info; |
| while (read_md_rtx (&info)) |
| switch (GET_CODE (info.def)) |
| { |
| case DEFINE_INSN: |
| gen_insn (&info); |
| break; |
| |
| case DEFINE_EXPAND: |
| printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); |
| gen_expand (&info); |
| break; |
| |
| case DEFINE_SPLIT: |
| printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); |
| gen_split (&info); |
| break; |
| |
| case DEFINE_PEEPHOLE2: |
| printf ("/* %s:%d */\n", info.loc.filename, info.loc.lineno); |
| gen_split (&info); |
| break; |
| |
| default: |
| break; |
| } |
| |
| /* Write out the routines to add CLOBBERs to a pattern and say whether they |
| clobber a hard reg. */ |
| output_add_clobbers (&info); |
| output_added_clobbers_hard_reg_p (); |
| |
| for (overloaded_name *oname = rtx_reader_ptr->get_overloads (); |
| oname; oname = oname->next) |
| { |
| handle_overloaded_code_for (oname); |
| handle_overloaded_gen (oname); |
| } |
| |
| fflush (stdout); |
| return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
| } |