1 /* Function integration definitions for GNU C-Compiler
2 Copyright (C) 1990, 1995, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 /* This structure is used to remap objects in the function being inlined to
24 those belonging to the calling function. It is passed by
25 expand_inline_function to its children.
27 This structure is also used when unrolling loops and otherwise
28 replicating code, although not all fields are needed in this case;
29 only those fields needed by copy_rtx_and_substitute() and its children
32 This structure is used instead of static variables because
33 expand_inline_function may be called recursively via expand_expr. */
37 /* True if we are doing function integration, false otherwise.
38 Used to control whether RTX_UNCHANGING bits are copied by
39 copy_rtx_and_substitute. */
41 /* Definition of function be inlined. */
42 union tree_node
*fndecl
;
43 /* Place to put insns needed at start of function. */
45 /* Mapping from old BLOCKs to new BLOCKs. */
46 varray_type block_map
;
47 /* Mapping from old registers to new registers.
48 It is allocated and deallocated in `expand_inline_function' */
50 #if defined (LEAF_REGISTERS) && defined (LEAF_REG_REMAP)
51 /* Mapping from old leaf registers to new leaf registers. */
52 rtx leaf_reg_map
[FIRST_PSEUDO_REGISTER
][NUM_MACHINE_MODES
];
54 /* Mapping from old code-labels to new code-labels.
55 The first element of this map is label_map[min_labelno]. */
57 /* Mapping from old insn uid's to copied insns. The first element
58 of this map is insn_map[min_insnno]; the last element is
59 insn_map[max_insnno]. We keep the bounds here for when the map
60 only covers a partial range of insns (such as loop unrolling or
63 int min_insnno
, max_insnno
;
65 /* Map pseudo reg number in calling function to equivalent constant. We
66 cannot in general substitute constants into parameter pseudo registers,
67 since some machine descriptions (many RISCs) won't always handle
68 the resulting insns. So if an incoming parameter has a constant
69 equivalent, we record it here, and if the resulting insn is
70 recognizable, we go with it.
72 We also use this mechanism to convert references to incoming arguments
73 and stacked variables. copy_rtx_and_substitute will replace the virtual
74 incoming argument and virtual stacked variables registers with new
75 pseudos that contain pointers into the replacement area allocated for
76 this inline instance. These pseudos are then marked as being equivalent
77 to the appropriate address and substituted if valid. */
78 varray_type const_equiv_varray
;
79 /* This is incremented for each new basic block.
80 It is used to store in the age field to record the domain of validity
81 of each entry in const_equiv_varray.
82 A value of -1 indicates an entry for a reg which is a parm.
83 All other values are "positive". */
84 #define CONST_AGE_PARM (-1)
85 unsigned int const_age
;
87 /* Target of the inline function being expanded, or NULL if none. */
89 /* When an insn is being copied by copy_rtx_and_substitute,
90 this is nonzero if we have copied an ASM_OPERANDS.
91 In that case, it is the original input-operand vector. */
92 rtvec orig_asm_operands_vector
;
93 /* When an insn is being copied by copy_rtx_and_substitute,
94 this is nonzero if we have copied an ASM_OPERANDS.
95 In that case, it is the copied input-operand vector. */
96 rtvec copy_asm_operands_vector
;
97 /* Likewise, this is the copied constraints vector. */
98 rtvec copy_asm_constraints_vector
;
100 /* Target of a return insn, if needed and inlining. */
101 rtx local_return_label
;
103 /* Indications for regs being pointers and their alignment. */
104 unsigned char *regno_pointer_align
;
105 rtx
*x_regno_reg_rtx
;
107 /* The next few fields are used for subst_constants to record the SETs
114 } equiv_sets
[MAX_RECOG_OPERANDS
];
115 /* Record the last thing assigned to pc. This is used for folded
116 conditional branch insns. */
119 /* Record the last thing assigned to cc0. */
122 /* Note mode of COMPARE if the mode would be otherwise lost (comparing of
123 two VOIDmode constants. */
125 enum machine_mode compare_mode
;
128 /* Return a copy of an rtx (as needed), substituting pseudo-register,
129 labels, and frame-pointer offsets as necessary. */
130 extern rtx copy_rtx_and_substitute
PARAMS ((rtx
, struct inline_remap
*, int));
132 /* Return a pseudo that corresponds to the value in the specified hard
133 reg as of the start of the function (for inlined functions, the
134 value at the start of the parent function). */
135 extern rtx get_hard_reg_initial_val
PARAMS ((enum machine_mode
, int));
136 /* Likewise, but for a different than the current function, or
137 arbitrary expression. */
138 extern rtx get_func_hard_reg_initial_val
PARAMS ((struct function
*, rtx
));
139 /* Likewise, but iff someone else has caused it to become allocated. */
140 extern rtx has_func_hard_reg_initial_val
PARAMS ((struct function
*, rtx
));
141 /* Likewise, but for common cases. */
142 extern rtx has_hard_reg_initial_val
PARAMS ((enum machine_mode
, int));
143 /* This is for GC. */
144 extern void mark_hard_reg_initial_vals
PARAMS ((struct function
*));
145 /* Called from rest_of_compilation. */
146 extern void emit_initial_value_sets
PARAMS ((void));
147 extern void allocate_initial_values
PARAMS ((rtx
*));
149 /* Copy a declaration when one function is substituted inline into
151 extern union tree_node
*copy_decl_for_inlining
PARAMS ((union tree_node
*,
155 extern void try_constants
PARAMS ((rtx
, struct inline_remap
*));
157 /* Return the label indicated. */
158 extern rtx get_label_from_map
PARAMS ((struct inline_remap
*, int));
160 /* Set the label indicated. */
161 #define set_label_in_map(MAP, I, X) ((MAP)->label_map[I] = (X))
163 /* Unfortunately, we need a global copy of const_equiv varray for
164 communication with a function called from note_stores. Be *very*
165 careful that this is used properly in the presence of recursion. */
167 extern varray_type global_const_equiv_varray
;
169 #define MAYBE_EXTEND_CONST_EQUIV_VARRAY(MAP,MAX) \
171 if ((size_t)(MAX) >= VARRAY_SIZE ((MAP)->const_equiv_varray)) \
173 int is_global = (global_const_equiv_varray \
174 == (MAP)->const_equiv_varray); \
175 VARRAY_GROW ((MAP)->const_equiv_varray, (MAX)+1); \
177 global_const_equiv_varray = (MAP)->const_equiv_varray; \
181 #define SET_CONST_EQUIV_DATA(MAP,REG,RTX,AGE) \
183 struct const_equiv_data *p; \
184 MAYBE_EXTEND_CONST_EQUIV_VARRAY ((MAP), REGNO (REG)); \
185 p = &VARRAY_CONST_EQUIV ((MAP)->const_equiv_varray, REGNO (REG)); \