-/* This structure is used to remap objects in the function being inlined to
- those belonging to the calling function. It is passed by
- expand_inline_function to its children.
-
- This structure is also used when unrolling loops and otherwise
- replicating code, although not all fields are needed in this case;
- only those fields needed by copy_rtx_and_substitute() and its children
- are used.
-
- This structure is used instead of static variables because
- expand_inline_function may be called recursively via expand_expr. */
-
-struct inline_remap
-{
- /* True if we are doing function integration, false otherwise.
- Used to control whether RTX_UNCHANGING bits are copied by
- copy_rtx_and_substitute. */
- int integrating;
- /* Definition of function be inlined. */
- union tree_node *fndecl;
- /* Place to put insns needed at start of function. */
- rtx insns_at_start;
- /* Mapping from old BLOCKs to new BLOCKs. */
- varray_type block_map;
- /* Mapping from old registers to new registers.
- It is allocated and deallocated in `expand_inline_function' */
- rtx *reg_map;
-#if defined (LEAF_REGISTERS) && defined (LEAF_REG_REMAP)
- /* Mapping from old leaf registers to new leaf registers. */
- rtx leaf_reg_map[FIRST_PSEUDO_REGISTER][NUM_MACHINE_MODES];
-#endif
- /* Mapping from old code-labels to new code-labels.
- The first element of this map is label_map[min_labelno]. */
- rtx *label_map;
- /* Mapping from old insn uid's to copied insns. The first element
- of this map is insn_map[min_insnno]; the last element is
- insn_map[max_insnno]. We keep the bounds here for when the map
- only covers a partial range of insns (such as loop unrolling or
- code replication). */
- rtx *insn_map;
- int min_insnno, max_insnno;
-
- /* Map pseudo reg number in calling function to equivalent constant. We
- cannot in general substitute constants into parameter pseudo registers,
- since some machine descriptions (many RISCs) won't always handle
- the resulting insns. So if an incoming parameter has a constant
- equivalent, we record it here, and if the resulting insn is
- recognizable, we go with it.
-
- We also use this mechanism to convert references to incoming arguments
- and stacked variables. copy_rtx_and_substitute will replace the virtual
- incoming argument and virtual stacked variables registers with new
- pseudos that contain pointers into the replacement area allocated for
- this inline instance. These pseudos are then marked as being equivalent
- to the appropriate address and substituted if valid. */
- varray_type const_equiv_varray;
- /* This is incremented for each new basic block.
- It is used to store in the age field to record the domain of validity
- of each entry in const_equiv_varray.
- A value of -1 indicates an entry for a reg which is a parm.
- All other values are "positive". */
-#define CONST_AGE_PARM (-1)
- unsigned int const_age;
-
- /* Target of the inline function being expanded, or NULL if none. */
- rtx inline_target;
- /* When an insn is being copied by copy_rtx_and_substitute,
- this is nonzero if we have copied an ASM_OPERANDS.
- In that case, it is the original input-operand vector. */
- rtvec orig_asm_operands_vector;
- /* When an insn is being copied by copy_rtx_and_substitute,
- this is nonzero if we have copied an ASM_OPERANDS.
- In that case, it is the copied input-operand vector. */
- rtvec copy_asm_operands_vector;
- /* Likewise, this is the copied constraints vector. */
- rtvec copy_asm_constraints_vector;
-
- /* Target of a return insn, if needed and inlining. */
- rtx local_return_label;
-
- /* Indications for regs being pointers and their alignment. */
- unsigned char *regno_pointer_align;
- rtx *x_regno_reg_rtx;
-
- /* The next few fields are used for subst_constants to record the SETs
- that it saw. */
- int num_sets;
- struct equiv_table
- {
- rtx dest;
- rtx equiv;
- } equiv_sets[MAX_RECOG_OPERANDS];
- /* Record the last thing assigned to pc. This is used for folded
- conditional branch insns. */
- rtx last_pc_value;
-#ifdef HAVE_cc0
- /* Record the last thing assigned to cc0. */
- rtx last_cc0_value;
-#endif
- /* Note mode of COMPARE if the mode would be otherwise lost (comparing of
- two VOIDmode constants. */
- rtx compare_src;
- enum machine_mode compare_mode;
-};
-
-/* Return a copy of an rtx (as needed), substituting pseudo-register,
- labels, and frame-pointer offsets as necessary. */
-extern rtx copy_rtx_and_substitute PARAMS ((rtx, struct inline_remap *, int));
-
-/* Return a pseudo that corresponds to the value in the specified hard
- reg as of the start of the function (for inlined functions, the
- value at the start of the parent function). */
-extern rtx get_hard_reg_initial_val PARAMS ((enum machine_mode, int));
-/* Likewise, but for a different than the current function, or
- arbitrary expression. */
-extern rtx get_func_hard_reg_initial_val PARAMS ((struct function *, rtx));
-/* Likewise, but iff someone else has caused it to become allocated. */
-extern rtx has_func_hard_reg_initial_val PARAMS ((struct function *, rtx));
-/* Likewise, but for common cases. */
-extern rtx has_hard_reg_initial_val PARAMS ((enum machine_mode, int));