195 lines
8.0 KiB
C
195 lines
8.0 KiB
C
/* Function integration definitions for GNU C-Compiler
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Copyright (C) 1990, 1995, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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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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#include "varray.h"
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/* This structure is used to remap objects in the function being inlined to
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those belonging to the calling function. It is passed by
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expand_inline_function to its children.
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This structure is also used when unrolling loops and otherwise
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replicating code, although not all fields are needed in this case;
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only those fields needed by copy_rtx_and_substitute() and its children
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are used.
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This structure is used instead of static variables because
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expand_inline_function may be called recursively via expand_expr. */
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struct inline_remap
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{
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/* True if we are doing function integration, false otherwise.
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Used to control whether RTX_UNCHANGING bits are copied by
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copy_rtx_and_substitute. */
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int integrating;
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/* Definition of function be inlined. */
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union tree_node *fndecl;
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/* Place to put insns needed at start of function. */
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rtx insns_at_start;
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/* Mapping from old BLOCKs to new BLOCKs. */
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varray_type block_map;
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/* Mapping from old registers to new registers.
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It is allocated and deallocated in `expand_inline_function' */
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rtx *reg_map;
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#if defined (LEAF_REGISTERS) && defined (LEAF_REG_REMAP)
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/* Mapping from old leaf registers to new leaf registers. */
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rtx leaf_reg_map[FIRST_PSEUDO_REGISTER][NUM_MACHINE_MODES];
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#endif
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/* Mapping from old code-labels to new code-labels.
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The first element of this map is label_map[min_labelno]. */
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rtx *label_map;
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/* Mapping from old insn uid's to copied insns. The first element
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of this map is insn_map[min_insnno]; the last element is
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insn_map[max_insnno]. We keep the bounds here for when the map
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only covers a partial range of insns (such as loop unrolling or
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code replication). */
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rtx *insn_map;
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int min_insnno, max_insnno;
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/* Map pseudo reg number in calling function to equivalent constant. We
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cannot in general substitute constants into parameter pseudo registers,
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since some machine descriptions (many RISCs) won't always handle
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the resulting insns. So if an incoming parameter has a constant
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equivalent, we record it here, and if the resulting insn is
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recognizable, we go with it.
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We also use this mechanism to convert references to incoming arguments
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and stacked variables. copy_rtx_and_substitute will replace the virtual
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incoming argument and virtual stacked variables registers with new
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pseudos that contain pointers into the replacement area allocated for
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this inline instance. These pseudos are then marked as being equivalent
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to the appropriate address and substituted if valid. */
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varray_type const_equiv_varray;
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/* This is incremented for each new basic block.
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It is used to store in the age field to record the domain of validity
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of each entry in const_equiv_varray.
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A value of -1 indicates an entry for a reg which is a parm.
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All other values are "positive". */
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#define CONST_AGE_PARM (-1)
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unsigned int const_age;
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/* Target of the inline function being expanded, or NULL if none. */
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rtx inline_target;
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/* When an insn is being copied by copy_rtx_and_substitute,
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this is nonzero if we have copied an ASM_OPERANDS.
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In that case, it is the original input-operand vector. */
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rtvec orig_asm_operands_vector;
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/* When an insn is being copied by copy_rtx_and_substitute,
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this is nonzero if we have copied an ASM_OPERANDS.
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In that case, it is the copied input-operand vector. */
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rtvec copy_asm_operands_vector;
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/* Likewise, this is the copied constraints vector. */
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rtvec copy_asm_constraints_vector;
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/* Target of a return insn, if needed and inlining. */
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rtx local_return_label;
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/* Indications for regs being pointers and their alignment. */
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unsigned char *regno_pointer_align;
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rtx *x_regno_reg_rtx;
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/* The next few fields are used for subst_constants to record the SETs
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that it saw. */
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int num_sets;
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struct equiv_table
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{
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rtx dest;
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rtx equiv;
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} equiv_sets[MAX_RECOG_OPERANDS];
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/* Record the last thing assigned to pc. This is used for folded
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conditional branch insns. */
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rtx last_pc_value;
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#ifdef HAVE_cc0
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/* Record the last thing assigned to cc0. */
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rtx last_cc0_value;
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#endif
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/* Note mode of COMPARE if the mode would be otherwise lost (comparing of
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two VOIDmode constants. */
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rtx compare_src;
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enum machine_mode compare_mode;
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};
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/* Return a copy of an rtx (as needed), substituting pseudo-register,
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labels, and frame-pointer offsets as necessary. */
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extern rtx copy_rtx_and_substitute PARAMS ((rtx, struct inline_remap *, int));
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/* Return a pseudo that corresponds to the value in the specified hard
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reg as of the start of the function (for inlined functions, the
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value at the start of the parent function). */
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extern rtx get_hard_reg_initial_val PARAMS ((enum machine_mode, int));
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/* Likewise, but for a different than the current function, or
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arbitrary expression. */
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extern rtx get_func_hard_reg_initial_val PARAMS ((struct function *, rtx));
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/* Likewise, but iff someone else has caused it to become allocated. */
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extern rtx has_func_hard_reg_initial_val PARAMS ((struct function *, rtx));
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/* Likewise, but for common cases. */
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extern rtx has_hard_reg_initial_val PARAMS ((enum machine_mode, int));
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/* If a pseudo represents an initial hard reg (or expression), return
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it, else return NULL_RTX. */
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extern rtx get_hard_reg_initial_reg PARAMS ((struct function *, rtx));
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/* Called from rest_of_compilation. */
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extern void emit_initial_value_sets PARAMS ((void));
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extern void allocate_initial_values PARAMS ((rtx *));
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/* Copy a declaration when one function is substituted inline into
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another. */
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extern union tree_node *copy_decl_for_inlining PARAMS ((union tree_node *,
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union tree_node *,
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union tree_node *));
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/* Check whether there's any attribute in a function declaration that
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makes the function uninlinable. Returns false if it finds any,
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true otherwise. */
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extern bool function_attribute_inlinable_p PARAMS ((union tree_node *));
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extern void try_constants PARAMS ((rtx, struct inline_remap *));
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/* Return the label indicated. */
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extern rtx get_label_from_map PARAMS ((struct inline_remap *, int));
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/* Set the label indicated. */
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#define set_label_in_map(MAP, I, X) ((MAP)->label_map[I] = (X))
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/* Unfortunately, we need a global copy of const_equiv varray for
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communication with a function called from note_stores. Be *very*
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careful that this is used properly in the presence of recursion. */
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extern varray_type global_const_equiv_varray;
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#define MAYBE_EXTEND_CONST_EQUIV_VARRAY(MAP,MAX) \
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{ \
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if ((size_t)(MAX) >= VARRAY_SIZE ((MAP)->const_equiv_varray)) \
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{ \
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int is_global = (global_const_equiv_varray \
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== (MAP)->const_equiv_varray); \
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VARRAY_GROW ((MAP)->const_equiv_varray, (MAX)+1); \
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if (is_global) \
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global_const_equiv_varray = (MAP)->const_equiv_varray; \
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} \
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}
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#define SET_CONST_EQUIV_DATA(MAP,REG,RTX,AGE) \
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{ \
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struct const_equiv_data *p; \
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MAYBE_EXTEND_CONST_EQUIV_VARRAY ((MAP), REGNO (REG)); \
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p = &VARRAY_CONST_EQUIV ((MAP)->const_equiv_varray, REGNO (REG)); \
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p->rtx = (RTX); \
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p->age = (AGE); \
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}
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