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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/genemit.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/genemit.c | 897 |
1 files changed, 897 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/genemit.c b/gcc-4.2.1-5666.3/gcc/genemit.c new file mode 100644 index 000000000..79db84e7b --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/genemit.c @@ -0,0 +1,897 @@ +/* Generate code from machine description to emit insns as rtl. + Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000, 2001, + 2003, 2004, 2005 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 +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 COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + + +#include "bconfig.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "rtl.h" +#include "errors.h" +#include "gensupport.h" + + +static int max_opno; +static int max_dup_opno; +static int max_scratch_opno; +static int insn_code_number; +static int insn_index_number; + +/* 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 max_operand_1 (rtx); +static int max_operand_vec (rtx, int); +static void print_code (RTX_CODE); +static void gen_exp (rtx, enum rtx_code, char *); +static void gen_insn (rtx, int); +static void gen_expand (rtx); +static void gen_split (rtx); +static void output_add_clobbers (void); +static void output_added_clobbers_hard_reg_p (void); +static void gen_rtx_scratch (rtx, enum rtx_code); +static void output_peephole2_scratches (rtx); + + +static void +max_operand_1 (rtx x) +{ + RTX_CODE code; + int i; + int len; + const char *fmt; + + if (x == 0) + return; + + code = GET_CODE (x); + + if (code == MATCH_OPERAND || code == MATCH_OPERATOR + || code == MATCH_PARALLEL) + max_opno = MAX (max_opno, XINT (x, 0)); + if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP) + max_dup_opno = MAX (max_dup_opno, XINT (x, 0)); + if (code == MATCH_SCRATCH) + max_scratch_opno = MAX (max_scratch_opno, XINT (x, 0)); + + fmt = GET_RTX_FORMAT (code); + len = GET_RTX_LENGTH (code); + for (i = 0; i < len; i++) + { + if (fmt[i] == 'e' || fmt[i] == 'u') + max_operand_1 (XEXP (x, i)); + else if (fmt[i] == 'E') + { + int j; + for (j = 0; j < XVECLEN (x, i); j++) + max_operand_1 (XVECEXP (x, i, j)); + } + } +} + +static int +max_operand_vec (rtx insn, int arg) +{ + int len = XVECLEN (insn, arg); + int i; + + max_opno = -1; + max_dup_opno = -1; + max_scratch_opno = -1; + + for (i = 0; i < len; i++) + max_operand_1 (XVECEXP (insn, arg, i)); + + return max_opno + 1; +} + +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) +{ + RTX_CODE code; + int i; + int len; + const char *fmt; + + 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); + } + 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); + } + 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 ADDRESS: + fatal ("ADDRESS expression code used in named instruction pattern"); + + case PC: + printf ("pc_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: + /* 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 (" (%smode", GET_MODE_NAME (GET_MODE (x))); + + fmt = GET_RTX_FORMAT (code); + len = GET_RTX_LENGTH (code); + for (i = 0; i < len; i++) + { + if (fmt[i] == '0') + break; + printf (",\n\t"); + switch (fmt[i]) + { + case 'e': case 'u': + gen_exp (XEXP (x, i), subroutine_type, used); + break; + + case 'i': + printf ("%u", XINT (x, i)); + 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); + } + printf (")"); + break; + } + + default: + gcc_unreachable (); + } + } + printf (")"); +} + +/* Generate the `gen_...' function for a DEFINE_INSN. */ + +static void +gen_insn (rtx insn, int lineno) +{ + int operands; + 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. */ + + 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 = insn_code_number; + + /* 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 = XEXP (XVECEXP (p->pattern, 1, j), 0); + rtx new = XEXP (XVECEXP (insn, 1, j), 0); + + /* OLD and NEW 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_MODE (old) == GET_MODE (new) + && ((GET_CODE (old) == MATCH_SCRATCH + && GET_CODE (new) == MATCH_SCRATCH) + || (REG_P (old) && REG_P (new) + && REGNO (old) == REGNO (new))))) + 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", read_rtx_filename, lineno); + + /* Find out how many operands this function has. */ + operands = max_operand_vec (insn, 1); + if (max_dup_opno >= operands) + fatal ("match_dup operand number has no match_operand"); + + /* Output the function name and argument declarations. */ + printf ("rtx\ngen_%s (", XSTR (insn, 0)); + if (operands) + for (i = 0; i < operands; 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. */ + + if (XVECLEN (insn, 1) == 1) + { + printf (" return "); + gen_exp (XVECEXP (insn, 1, 0), DEFINE_INSN, NULL); + printf (";\n}\n\n"); + } + else + { + printf (" return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (%d", + XVECLEN (insn, 1)); + + for (i = 0; i < XVECLEN (insn, 1); i++) + { + printf (",\n\t\t"); + gen_exp (XVECEXP (insn, 1, i), DEFINE_INSN, NULL); + } + printf ("));\n}\n\n"); + } +} + +/* Generate the `gen_...' function for a DEFINE_EXPAND. */ + +static void +gen_expand (rtx expand) +{ + int operands; + int i; + + if (strlen (XSTR (expand, 0)) == 0) + fatal ("define_expand lacks a name"); + if (XVEC (expand, 1) == 0) + fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0)); + + /* Find out how many operands this function has. */ + operands = max_operand_vec (expand, 1); + + /* Output the function name and argument declarations. */ + printf ("rtx\ngen_%s (", XSTR (expand, 0)); + if (operands) + for (i = 0; i < operands; 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') + && operands > max_dup_opno + && XVECLEN (expand, 1) == 1) + { + printf (" return "); + gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL); + printf (";\n}\n\n"); + return; + } + + /* For each operand referred to only with MATCH_DUPs, + make a local variable. */ + for (i = operands; i <= max_dup_opno; i++) + printf (" rtx operand%d;\n", i); + for (; i <= max_scratch_opno; i++) + printf (" rtx operand%d ATTRIBUTE_UNUSED;\n", i); + printf (" rtx _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 (operands > 0 || max_dup_opno >= 0 || max_scratch_opno >= 0) + printf (" rtx operands[%d];\n", + MAX (operands, MAX (max_scratch_opno, max_dup_opno) + 1)); + /* Output code to copy the arguments into `operands'. */ + for (i = 0; i < operands; i++) + printf (" operands[%d] = operand%d;\n", i, i); + + /* Output the special code to be executed before the sequence + is generated. */ + print_rtx_ptr_loc (XSTR (expand, 3)); + printf ("%s\n", XSTR (expand, 3)); + + /* 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 < operands; i++) + printf (" operand%d = operands[%d];\n", i, i); + for (; i <= max_dup_opno; i++) + printf (" operand%d = operands[%d];\n", i, i); + for (; i <= max_scratch_opno; i++) + printf (" operand%d = operands[%d];\n", i, i); + } + printf (" }\n"); + } + + /* Output code to construct the rtl for the instruction bodies. + Use emit_insn to add them to the sequence being accumulated. + But don't do this if the user's code has set `no_more' nonzero. */ + + for (i = 0; i < XVECLEN (expand, 1); i++) + { + rtx next = XVECEXP (expand, 1, i); + if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) + || (GET_CODE (next) == PARALLEL + && ((GET_CODE (XVECEXP (next, 0, 0)) == SET + && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) + || GET_CODE (XVECEXP (next, 0, 0)) == RETURN)) + || GET_CODE (next) == RETURN) + printf (" emit_jump_insn ("); + else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) + || GET_CODE (next) == CALL + || (GET_CODE (next) == PARALLEL + && GET_CODE (XVECEXP (next, 0, 0)) == SET + && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) + || (GET_CODE (next) == PARALLEL + && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) + printf (" emit_call_insn ("); + else if (LABEL_P (next)) + printf (" emit_label ("); + else if (GET_CODE (next) == MATCH_OPERAND + || GET_CODE (next) == MATCH_DUP + || GET_CODE (next) == MATCH_OPERATOR + || GET_CODE (next) == MATCH_OP_DUP + || GET_CODE (next) == MATCH_PARALLEL + || GET_CODE (next) == MATCH_PAR_DUP + || GET_CODE (next) == PARALLEL) + printf (" emit ("); + else + printf (" emit_insn ("); + gen_exp (next, DEFINE_EXPAND, NULL); + printf (");\n"); + if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC + && GET_CODE (SET_SRC (next)) == LABEL_REF) + printf (" emit_barrier ();"); + } + + /* 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 (rtx split) +{ + int i; + int operands; + const char *const name = + ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split"); + const char *unused; + char *used; + + if (XVEC (split, 0) == 0) + fatal ("define_%s (definition %d) lacks a pattern", name, + insn_index_number); + else if (XVEC (split, 2) == 0) + fatal ("define_%s (definition %d) lacks a replacement pattern", name, + insn_index_number); + + /* Find out how many operands this function has. */ + + max_operand_vec (split, 2); + operands = MAX (max_opno, MAX (max_dup_opno, max_scratch_opno)) + 1; + unused = (operands == 0 ? " ATTRIBUTE_UNUSED" : ""); + used = XCNEWVEC (char, operands); + + /* Output the prototype, function name and argument declarations. */ + if (GET_CODE (split) == DEFINE_PEEPHOLE2) + { + printf ("extern rtx gen_%s_%d (rtx, rtx *);\n", + name, insn_code_number); + printf ("rtx\ngen_%s_%d (rtx curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", + name, insn_code_number, unused); + } + else + { + printf ("extern rtx gen_split_%d (rtx, rtx *);\n", insn_code_number); + printf ("rtx\ngen_split_%d (rtx curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", + insn_code_number, unused); + } + printf ("{\n"); + + /* Declare all local variables. */ + for (i = 0; i < operands; i++) + printf (" rtx operand%d;\n", i); + printf (" rtx _val = 0;\n"); + + if (GET_CODE (split) == DEFINE_PEEPHOLE2) + output_peephole2_scratches (split); + + printf (" start_sequence ();\n"); + + /* The fourth operand of DEFINE_SPLIT is some code to be executed + before the actual construction. */ + + if (XSTR (split, 3)) + { + print_rtx_ptr_loc (XSTR (split, 3)); + printf ("%s\n", XSTR (split, 3)); + } + + /* Output code to copy the arguments back out of `operands' */ + for (i = 0; i < operands; i++) + printf (" operand%d = operands[%d];\n", i, i); + + /* Output code to construct the rtl for the instruction bodies. + Use emit_insn to add them to the sequence being accumulated. + But don't do this if the user's code has set `no_more' nonzero. */ + + for (i = 0; i < XVECLEN (split, 2); i++) + { + rtx next = XVECEXP (split, 2, i); + if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) + || (GET_CODE (next) == PARALLEL + && GET_CODE (XVECEXP (next, 0, 0)) == SET + && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) + || GET_CODE (next) == RETURN) + printf (" emit_jump_insn ("); + else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) + || GET_CODE (next) == CALL + || (GET_CODE (next) == PARALLEL + && GET_CODE (XVECEXP (next, 0, 0)) == SET + && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) + || (GET_CODE (next) == PARALLEL + && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) + printf (" emit_call_insn ("); + else if (LABEL_P (next)) + printf (" emit_label ("); + else if (GET_CODE (next) == MATCH_OPERAND + || GET_CODE (next) == MATCH_OPERATOR + || GET_CODE (next) == MATCH_PARALLEL + || GET_CODE (next) == MATCH_OP_DUP + || GET_CODE (next) == MATCH_DUP + || GET_CODE (next) == PARALLEL) + printf (" emit ("); + else + printf (" emit_insn ("); + gen_exp (next, GET_CODE (split), used); + printf (");\n"); + if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC + && GET_CODE (SET_SRC (next)) == LABEL_REF) + printf (" emit_barrier ();"); + } + + /* 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 (void) +{ + 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); + 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; + + printf (" HARD_REG_SET _regs_allocated;\n"); + printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); + + 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++; + + 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++; + } +} + +int +main (int argc, char **argv) +{ + rtx desc; + + progname = "genemit"; + + if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE) + return (FATAL_EXIT_CODE); + + /* Assign sequential codes to all entries in the machine description + in parallel with the tables in insn-output.c. */ + + insn_code_number = 0; + insn_index_number = 0; + + printf ("/* Generated automatically by the program `genemit'\n\ +from the machine description file `md'. */\n\n"); + + printf ("#include \"config.h\"\n"); + printf ("#include \"system.h\"\n"); + printf ("#include \"coretypes.h\"\n"); + printf ("#include \"tm.h\"\n"); + printf ("#include \"rtl.h\"\n"); + printf ("#include \"tm_p.h\"\n"); + printf ("#include \"function.h\"\n"); + printf ("#include \"expr.h\"\n"); + printf ("#include \"optabs.h\"\n"); + printf ("#include \"real.h\"\n"); + printf ("#include \"flags.h\"\n"); + printf ("#include \"output.h\"\n"); + printf ("#include \"insn-config.h\"\n"); + printf ("#include \"hard-reg-set.h\"\n"); + printf ("#include \"recog.h\"\n"); + printf ("#include \"resource.h\"\n"); + printf ("#include \"reload.h\"\n"); + printf ("#include \"toplev.h\"\n"); + printf ("#include \"tm-constrs.h\"\n"); + printf ("#include \"ggc.h\"\n\n"); + printf ("#include \"basic-block.h\"\n\n"); + printf ("#define FAIL return (end_sequence (), _val)\n"); + printf ("#define DONE return (_val = get_insns (), end_sequence (), _val)\n\n"); + + /* Read the machine description. */ + + while (1) + { + int line_no; + + desc = read_md_rtx (&line_no, &insn_code_number); + if (desc == NULL) + break; + + switch (GET_CODE (desc)) + { + case DEFINE_INSN: + gen_insn (desc, line_no); + break; + + case DEFINE_EXPAND: + printf ("/* %s:%d */\n", read_rtx_filename, line_no); + gen_expand (desc); + break; + + case DEFINE_SPLIT: + printf ("/* %s:%d */\n", read_rtx_filename, line_no); + gen_split (desc); + break; + + case DEFINE_PEEPHOLE2: + printf ("/* %s:%d */\n", read_rtx_filename, line_no); + gen_split (desc); + break; + + default: + break; + } + ++insn_index_number; + } + + /* Write out the routines to add CLOBBERs to a pattern and say whether they + clobber a hard reg. */ + output_add_clobbers (); + output_added_clobbers_hard_reg_p (); + + fflush (stdout); + return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); +} |