* array.c, data.c, decl.c, dependency.c, error.c, f95-lang.c, interface.c, intrinsic.c, io.c, misc.c, module.c, parse.h, resolve.c, scanner.c, trans-array.c, trans-array.h, trans-common.c, trans-const.h, trans-decl.c, trans-expr.c, trans-intrinsic.c, trans-stmt.c, trans-types.c, trans.c, trans.h: Fix comment typos. Follow spelling conventions. From-SVN: r87605
572 lines
19 KiB
C
572 lines
19 KiB
C
/* Header for code translation functions
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Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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Contributed by Paul Brook
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef GFC_TRANS_H
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#define GFC_TRANS_H
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/* Mangled symbols take the form __module__name. */
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#define GFC_MAX_MANGLED_SYMBOL_LEN (GFC_MAX_SYMBOL_LEN*2+4)
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/* Struct for holding a block of statements. It should be treated as an
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opaque entity and not modified directly. This allows us to change the
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underlying representation of statement lists. */
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typedef struct
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{
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tree head;
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unsigned int has_scope:1;
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}
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stmtblock_t;
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/* a simplified expression */
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typedef struct gfc_se
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{
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/* Code blocks to be executed before and after using the value. */
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stmtblock_t pre;
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stmtblock_t post;
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/* the result of the expression */
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tree expr;
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/* The length of a character string value. */
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tree string_length;
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/* If set gfc_conv_variable will return an expression for the array
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descriptor. When set, want_pointer should also be set.
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If not set scalarizing variables will be substituted. */
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unsigned descriptor_only:1;
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/* When this is set gfc_conv_expr returns the address of a variable. Only
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applies to EXPR_VARIABLE nodes.
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Also used by gfc_conv_array_parameter. When set this indicates a pointer
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to the descriptor should be returned, rather than the descriptor itself.
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*/
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unsigned want_pointer:1;
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/* An array function call returning without a temporary. Also used for array
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pointer assignments. */
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unsigned direct_byref:1;
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/* Ignore absent optional arguments. Used for some intrinsics. */
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unsigned ignore_optional:1;
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/* Scalarization parameters. */
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struct gfc_se *parent;
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struct gfc_ss *ss;
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struct gfc_loopinfo *loop;
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}
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gfc_se;
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/* Scalarisation State chain. Created by walking an expression tree before
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creating the scalarization loops. Then passed as part of a gfc_se structure
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to translate the expression inside the loop. Note that these chains are
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terminated by gfc_se_terminator, not NULL. A NULL pointer in a gfc_se
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indicates to gfc_conv_* that this is a scalar expression.
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Note that some member arrays correspond to scalarizer rank and others
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are the variable rank. */
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typedef struct gfc_ss_info
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{
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int dimen;
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/* The ref that holds information on this section. */
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gfc_ref *ref;
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/* The descriptor of this array. */
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tree descriptor;
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/* holds the pointer to the data array. */
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tree data;
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/* To move some of the array index calculation out of the innermost loop. */
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tree offset;
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tree saved_offset;
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tree stride0;
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/* Holds the SS for a subscript. Indexed by actual dimension. */
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struct gfc_ss *subscript[GFC_MAX_DIMENSIONS];
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/* stride and delta are used to access this inside a scalarization loop.
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start is used in the calculation of these. Indexed by scalarizer
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dimension. */
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tree start[GFC_MAX_DIMENSIONS];
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tree stride[GFC_MAX_DIMENSIONS];
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tree delta[GFC_MAX_DIMENSIONS];
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/* Translation from scalariser dimensions to actual dimensions.
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actual = dim[scalarizer] */
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int dim[GFC_MAX_DIMENSIONS];
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}
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gfc_ss_info;
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typedef enum
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{
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/* A scalar value. This will be evaluated before entering the
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scalarization loop. */
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GFC_SS_SCALAR,
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/* Like GFC_SS_SCALAR except it evaluates a pointer the the expression.
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Used for elemental function parameters. */
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GFC_SS_REFERENCE,
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/* An array section. Scalarization indices will be substituted during
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expression translation. */
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GFC_SS_SECTION,
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/* A non-elemental function call returning an array. The call is executed
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before entering the scalarization loop, storing the result in a
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temporary. This temporary is then used inside the scalarization loop.
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Simple assignments, eg. a(:) = fn() are handles without a temporary
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as a special case. */
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GFC_SS_FUNCTION,
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/* An array constructor. The current implementation is sub-optimal in
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many cases. It allocated a temporary, assigns the values to it, then
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uses this temporary inside the scalarization loop. */
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GFC_SS_CONSTRUCTOR,
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/* A vector subscript. Only used as the SS chain for a subscript.
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Similar int format to a GFC_SS_SECTION. */
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GFC_SS_VECTOR,
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/* A temporary array allocated by the scalarizer. Its rank can be less
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than that of the assignment expression. */
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GFC_SS_TEMP,
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/* An intrinsic function call. Many intrinsic functions which map directly
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to library calls are created as GFC_SS_FUNCTION nodes. */
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GFC_SS_INTRINSIC,
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/* A component of a derived type. */
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GFC_SS_COMPONENT
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}
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gfc_ss_type;
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/* SS structures can only belong to a single loopinfo. They must be added
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otherwise they will not get freed. */
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typedef struct gfc_ss
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{
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gfc_ss_type type;
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gfc_expr *expr;
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mpz_t *shape;
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tree string_length;
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union
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{
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/* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */
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struct
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{
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tree expr;
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}
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scalar;
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/* GFC_SS_TEMP. */
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struct
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{
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/* The rank of the temporary. May be less than the rank of the
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assigned expression. */
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int dimen;
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tree type;
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}
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temp;
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/* All other types. */
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gfc_ss_info info;
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}
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data;
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/* All the SS in a loop and linked through loop_chain. The SS for an
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expression are linked by the next pointer. */
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struct gfc_ss *loop_chain;
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struct gfc_ss *next;
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/* This is used by assignments requiring teporaries. The bits specify which
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loops the terms appear in. This will be 1 for the RHS expressions,
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2 for the LHS expressions, and 3(=1|2) for the temporary. */
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unsigned useflags:2;
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}
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gfc_ss;
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#define gfc_get_ss() gfc_getmem(sizeof(gfc_ss))
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/* The contents of this aren't actually used. A NULL SS chain indicates a
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scalar expression, so this pointer is used to terminate SS chains. */
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extern gfc_ss * const gfc_ss_terminator;
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/* Holds information about an expression while it is being scalarized. */
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typedef struct gfc_loopinfo
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{
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stmtblock_t pre;
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stmtblock_t post;
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int dimen;
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/* All the SS involved with this loop. */
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gfc_ss *ss;
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/* The SS describing the teporary used in an assignment. */
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gfc_ss *temp_ss;
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/* The scalarization loop index variables. */
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tree loopvar[GFC_MAX_DIMENSIONS];
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/* The bounds of the scalarization loops. */
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tree from[GFC_MAX_DIMENSIONS];
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tree to[GFC_MAX_DIMENSIONS];
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gfc_ss *specloop[GFC_MAX_DIMENSIONS];
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/* The code member contains the code for the body of the next outer loop. */
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stmtblock_t code[GFC_MAX_DIMENSIONS];
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/* Order in which the dimensions should be looped, innermost first. */
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int order[GFC_MAX_DIMENSIONS];
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/* The number of dimensions for which a temporary is used. */
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int temp_dim;
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/* If set we don't need the loop variables. */
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unsigned array_parameter:1;
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}
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gfc_loopinfo;
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/* Information about a symbol that has been shadowed by a temporary. */
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typedef struct
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{
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symbol_attribute attr;
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tree decl;
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}
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gfc_saved_var;
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/* Advance the SS chain to the next term. */
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void gfc_advance_se_ss_chain (gfc_se *);
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/* Call this to initialise a gfc_se structure before use
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first parameter is structure to initialise, second is
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parent to get scalarization data from, or NULL. */
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void gfc_init_se (gfc_se *, gfc_se *);
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/* Create an artificial variable decl and add it to the current scope. */
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tree gfc_create_var (tree, const char *);
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/* Like above but doesn't add it to the current scope. */
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tree gfc_create_var_np (tree, const char *);
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/* Store the result of an expression in a temp variable so it can be used
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repeatedly even if the original changes */
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void gfc_make_safe_expr (gfc_se * se);
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/* Makes sure se is suitable for passing as a function string parameter. */
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void gfc_conv_string_parameter (gfc_se * se);
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/* Add an item to the end of TREE_LIST. */
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tree gfc_chainon_list (tree, tree);
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/* When using the gfc_conv_* make sure you understand what they do, i.e.
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when a POST chain may be created, and what the retured expression may be
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used for. Note that character strings have special handling. This
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should not be a problem as most statements/operations only deal with
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numeric/logical types. */
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/* Entry point for expression translation. */
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void gfc_conv_expr (gfc_se * se, gfc_expr * expr);
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/* Like gfc_conv_expr, but the POST block is guaranteed to be empty for
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numeric expressions. */
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void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr);
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/* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs of
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an assignment. */
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void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr);
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/* Converts an expression so that it can be passed be reference. */
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void gfc_conv_expr_reference (gfc_se * se, gfc_expr *);
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/* Equivalent to convert(type, gfc_conv_expr_val(se, expr)). */
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void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree);
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/* If the value is not constant, Create a temporary and copy the value. */
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tree gfc_evaluate_now (tree, stmtblock_t *);
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/* Intrinsic function handling. */
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void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *);
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/* Does an intrinsic map directly to an external library call. */
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int gfc_is_intrinsic_libcall (gfc_expr *);
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/* Also used to CALL subroutines. */
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void gfc_conv_function_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *);
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/* gfc_trans_* shouldn't call push/poplevel, use gfc_push/pop_scope */
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/* Generate code for a scalar assignment. */
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tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, bt);
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/* Translate COMMON blocks. */
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void gfc_trans_common (gfc_namespace *);
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/* Translate a derived type constructor. */
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void gfc_conv_structure (gfc_se *, gfc_expr *, int);
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/* Return an expression which determines if a dummy parameter is present. */
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tree gfc_conv_expr_present (gfc_symbol *);
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/* Generate code to allocate a string temporary. */
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tree gfc_conv_string_tmp (gfc_se *, tree, tree);
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/* Initialize a string length variable. */
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void gfc_trans_init_string_length (gfc_charlen *, stmtblock_t *);
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/* Add an expression to the end of a block. */
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void gfc_add_expr_to_block (stmtblock_t *, tree);
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/* Add a block to the end of a block. */
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void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *);
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/* Add a MODIFY_EXPR to a block. */
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void gfc_add_modify_expr (stmtblock_t *, tree, tree);
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/* Initialize a statement block. */
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void gfc_init_block (stmtblock_t *);
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/* Start a new satement block. Like gfc_init_block but also starts a new
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variable scope. */
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void gfc_start_block (stmtblock_t *);
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/* Finish a statement block. Also closes the scope if the block was created
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with gfc_start_block. */
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tree gfc_finish_block (stmtblock_t *);
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/* Merge the scope of a block with its parent. */
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void gfc_merge_block_scope (stmtblock_t * block);
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/* Return the backend label decl. */
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tree gfc_get_label_decl (gfc_st_label *);
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/* Return the decl for an external function. */
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tree gfc_get_extern_function_decl (gfc_symbol *);
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/* Return the decl for a function. */
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tree gfc_get_function_decl (gfc_symbol *);
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/* Build a CALL_EXPR. */
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tree gfc_build_function_call (tree, tree);
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/* Build an ADDR_EXPR. */
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tree gfc_build_addr_expr (tree, tree);
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/* Build an INDIRECT_REF. */
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tree gfc_build_indirect_ref (tree);
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/* Build an ARRAY_REF. */
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tree gfc_build_array_ref (tree, tree);
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/* Creates an label. Decl is artificial if label_id == NULL_TREE. */
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tree gfc_build_label_decl (tree);
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/* Return the decl used to hold the function return value.
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Do not use if the function has an explicit result variable. */
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tree gfc_get_fake_result_decl (gfc_symbol *);
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/* Get the return label for the current function. */
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tree gfc_get_return_label (void);
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/* Add a decl to the binding level for the current function. */
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void gfc_add_decl_to_function (tree);
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/* Make prototypes for runtime library functions. */
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void gfc_build_builtin_function_decls (void);
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/* Set the backend source location of a decl. */
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void gfc_set_decl_location (tree, locus *);
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/* Return the variable decl for a symbol. */
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tree gfc_get_symbol_decl (gfc_symbol *);
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/* Build a static initializer. */
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tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool);
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/* Substitute a temporary variable in place of the real one. */
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void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *);
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/* Restore the original variable. */
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void gfc_restore_sym (gfc_symbol *, gfc_saved_var *);
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/* Allocate the lang-spcific part of a decl node. */
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void gfc_allocate_lang_decl (tree);
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/* Advance along a TREE_CHAIN. */
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tree gfc_advance_chain (tree, int);
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/* Create a decl for a function. */
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void gfc_create_function_decl (gfc_namespace *);
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/* Generate the code for a function. */
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void gfc_generate_function_code (gfc_namespace *);
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/* Output a BLOCK DATA program unit. */
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void gfc_generate_block_data (gfc_namespace *);
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/* Output a decl for a module variable. */
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void gfc_generate_module_vars (gfc_namespace *);
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/* Get and set the current location. */
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void gfc_set_backend_locus (locus *);
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void gfc_get_backend_locus (locus *);
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/* Handle static constructor functions. */
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extern GTY(()) tree gfc_static_ctors;
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void gfc_generate_constructors (void);
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/* Generate a runtime error check. */
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void gfc_trans_runtime_check (tree, tree, stmtblock_t *);
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/* Generate code for an assignment, includes scalarization. */
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tree gfc_trans_assignment (gfc_expr *, gfc_expr *);
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/* Generate code for an pointer assignment. */
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tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *);
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/* Initialize function decls for library functions. */
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void gfc_build_intrinsic_lib_fndecls (void);
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/* Create function decls for IO library functions. */
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void gfc_build_io_library_fndecls (void);
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/* Build a function decl for a library function. */
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tree gfc_build_library_function_decl (tree, tree, int, ...);
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/* somewhere! */
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tree pushdecl (tree);
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tree pushdecl_top_level (tree);
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void pushlevel (int);
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tree poplevel (int, int, int);
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tree getdecls (void);
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tree gfc_truthvalue_conversion (tree);
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tree builtin_function (const char *, tree, int, enum built_in_class,
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const char *, tree);
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/* Runtime library function decls. */
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extern GTY(()) tree gfor_fndecl_internal_malloc;
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extern GTY(()) tree gfor_fndecl_internal_malloc64;
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extern GTY(()) tree gfor_fndecl_internal_free;
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extern GTY(()) tree gfor_fndecl_allocate;
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extern GTY(()) tree gfor_fndecl_allocate64;
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extern GTY(()) tree gfor_fndecl_deallocate;
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extern GTY(()) tree gfor_fndecl_pause_numeric;
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extern GTY(()) tree gfor_fndecl_pause_string;
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extern GTY(()) tree gfor_fndecl_stop_numeric;
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extern GTY(()) tree gfor_fndecl_stop_string;
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extern GTY(()) tree gfor_fndecl_select_string;
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extern GTY(()) tree gfor_fndecl_runtime_error;
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extern GTY(()) tree gfor_fndecl_in_pack;
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extern GTY(()) tree gfor_fndecl_in_unpack;
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extern GTY(()) tree gfor_fndecl_associated;
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/* Math functions. Many other math functions are handled in
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trans-intrinsic.c. */
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typedef struct gfc_powdecl_list GTY(())
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{
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tree integer;
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tree real;
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tree cmplx;
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}
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gfc_powdecl_list;
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extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[3][2];
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extern GTY(()) tree gfor_fndecl_math_cpowf;
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extern GTY(()) tree gfor_fndecl_math_cpow;
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extern GTY(()) tree gfor_fndecl_math_ishftc4;
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extern GTY(()) tree gfor_fndecl_math_ishftc8;
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extern GTY(()) tree gfor_fndecl_math_exponent4;
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extern GTY(()) tree gfor_fndecl_math_exponent8;
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/* String functions. */
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extern GTY(()) tree gfor_fndecl_copy_string;
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extern GTY(()) tree gfor_fndecl_compare_string;
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extern GTY(()) tree gfor_fndecl_concat_string;
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extern GTY(()) tree gfor_fndecl_string_len_trim;
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extern GTY(()) tree gfor_fndecl_string_index;
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extern GTY(()) tree gfor_fndecl_string_scan;
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extern GTY(()) tree gfor_fndecl_string_verify;
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extern GTY(()) tree gfor_fndecl_string_trim;
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extern GTY(()) tree gfor_fndecl_string_repeat;
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extern GTY(()) tree gfor_fndecl_adjustl;
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extern GTY(()) tree gfor_fndecl_adjustr;
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/* Other misc. runtime library functions. */
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extern GTY(()) tree gfor_fndecl_size0;
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extern GTY(()) tree gfor_fndecl_size1;
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extern GTY(()) tree gfor_fndecl_iargc;
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/* Implemented in FORTRAN. */
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extern GTY(()) tree gfor_fndecl_si_kind;
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extern GTY(()) tree gfor_fndecl_sr_kind;
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/* True if node is an integer constant. */
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#define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST)
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/* G95-specific declaration information. */
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/* Array types only. */
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struct lang_type GTY(())
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{
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int rank;
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tree lbound[GFC_MAX_DIMENSIONS];
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tree ubound[GFC_MAX_DIMENSIONS];
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tree stride[GFC_MAX_DIMENSIONS];
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tree size;
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tree offset;
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tree dtype;
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tree dataptr_type;
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};
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struct lang_decl GTY(())
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{
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/* Dummy variables. */
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tree saved_descriptor;
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/* Assigned integer nodes. Stringlength is the IO format string's length.
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Addr is the address of the string or the target label. Stringlength is
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initialized to -2 and assigned to -1 when addr is assigned to the
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address of target label. */
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tree stringlen;
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tree addr;
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};
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#define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr
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#define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen
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#define GFC_DECL_SAVED_DESCRIPTOR(node) \
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(DECL_LANG_SPECIFIC(node)->saved_descriptor)
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#define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node)
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#define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node)
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#define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node)
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/* An array descriptor. */
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#define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node)
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/* An array without a descriptor. */
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#define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node)
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/* The GFC_TYPE_ARRAY_* members are present in both descriptor and
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descriptorless array types. */
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#define GFC_TYPE_ARRAY_LBOUND(node, dim) \
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(TYPE_LANG_SPECIFIC(node)->lbound[dim])
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#define GFC_TYPE_ARRAY_UBOUND(node, dim) \
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(TYPE_LANG_SPECIFIC(node)->ubound[dim])
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#define GFC_TYPE_ARRAY_STRIDE(node, dim) \
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(TYPE_LANG_SPECIFIC(node)->stride[dim])
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#define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank)
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#define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size)
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#define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset)
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#define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype)
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#define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \
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(TYPE_LANG_SPECIFIC(node)->dataptr_type)
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/* I changed this from sorry(...) because it should not return. */
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/* TODO: Remove gfc_todo_error before releasing version 1.0. */
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#define gfc_todo_error(args...) fatal_error("gfc_todo: Not Implemented: " args)
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/* Build an expression with void type. */
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#define build1_v(code, arg) build(code, void_type_node, arg)
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#define build2_v(code, arg1, arg2) build2(code, void_type_node, \
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arg1, arg2)
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#define build3_v(code, arg1, arg2, arg3) build3(code, void_type_node, \
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arg1, arg2, arg3)
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/* flag for alternative return labels. */
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extern int has_alternate_specifier; /* for caller */
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#endif /* GFC_TRANS_H */
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