Reorganize the gcc vendor import work area. This flattens out a bunch

of unnecessary path components that are relics of cvs2svn.

(These are directory moves)

1 files changed, 582 insertions, 0 deletions

diff --git a/gcc/function.h b/gcc/function.h
new file mode 100644
index 0000000..1903b16
--- /dev/null
+++ b/gcc/function.h
@@ -0,0 +1,582 @@
+/* Structure for saving state for a nested function.
+   Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+   1999, 2000, 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.  */
+
+#ifndef GCC_FUNCTION_H
+#define GCC_FUNCTION_H
+
+#include "tree.h"
+#include "hashtab.h"
+
+struct var_refs_queue GTY(())
+{
+  rtx modified;
+  enum machine_mode promoted_mode;
+  int unsignedp;
+  struct var_refs_queue *next;
+};
+
+/* Stack of pending (incomplete) sequences saved by `start_sequence'.
+   Each element describes one pending sequence.
+   The main insn-chain is saved in the last element of the chain,
+   unless the chain is empty.  */
+
+struct sequence_stack GTY(())
+{
+  /* First and last insns in the chain of the saved sequence.  */
+  rtx first;
+  rtx last;
+  struct sequence_stack *next;
+};
+
+extern struct sequence_stack *sequence_stack;
+
+/* Stack of single obstacks.  */
+
+struct simple_obstack_stack
+{
+  struct obstack *obstack;
+  struct simple_obstack_stack *next;
+};
+
+struct emit_status GTY(())
+{
+  /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
+     After rtl generation, it is 1 plus the largest register number used.  */
+  int x_reg_rtx_no;
+
+  /* Lowest label number in current function.  */
+  int x_first_label_num;
+
+  /* The ends of the doubly-linked chain of rtl for the current function.
+     Both are reset to null at the start of rtl generation for the function.
+
+     start_sequence saves both of these on `sequence_stack' and then starts
+     a new, nested sequence of insns.  */
+  rtx x_first_insn;
+  rtx x_last_insn;
+
+  /* Stack of pending (incomplete) sequences saved by `start_sequence'.
+     Each element describes one pending sequence.
+     The main insn-chain is saved in the last element of the chain,
+     unless the chain is empty.  */
+  struct sequence_stack *sequence_stack;
+
+  /* INSN_UID for next insn emitted.
+     Reset to 1 for each function compiled.  */
+  int x_cur_insn_uid;
+
+  /* Location the last line-number NOTE emitted.
+     This is used to avoid generating duplicates.  */
+  location_t x_last_location;
+
+  /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx
+     vectors.  Since these vectors are needed during the expansion phase when
+     the total number of registers in the function is not yet known, the
+     vectors are copied and made bigger when necessary.  */
+  int regno_pointer_align_length;
+
+  /* Indexed by pseudo register number, if nonzero gives the known alignment
+     for that pseudo (if REG_POINTER is set in x_regno_reg_rtx).
+     Allocated in parallel with x_regno_reg_rtx.  */
+  unsigned char * GTY ((length ("%h.x_reg_rtx_no")))
+    regno_pointer_align;
+
+  /* Indexed by pseudo register number, gives the rtx for that pseudo.
+     Allocated in parallel with regno_pointer_align.  */
+  rtx * GTY ((length ("%h.x_reg_rtx_no"))) x_regno_reg_rtx;
+};
+
+/* For backward compatibility... eventually these should all go away.  */
+#define reg_rtx_no (cfun->emit->x_reg_rtx_no)
+#define regno_reg_rtx (cfun->emit->x_regno_reg_rtx)
+#define seq_stack (cfun->emit->sequence_stack)
+
+#define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO])
+
+struct expr_status GTY(())
+{
+  /* Number of units that we should eventually pop off the stack.
+     These are the arguments to function calls that have already returned.  */
+  int x_pending_stack_adjust;
+
+  /* Under some ABIs, it is the caller's responsibility to pop arguments
+     pushed for function calls.  A naive implementation would simply pop
+     the arguments immediately after each call.  However, if several
+     function calls are made in a row, it is typically cheaper to pop
+     all the arguments after all of the calls are complete since a
+     single pop instruction can be used.  Therefore, GCC attempts to
+     defer popping the arguments until absolutely necessary.  (For
+     example, at the end of a conditional, the arguments must be popped,
+     since code outside the conditional won't know whether or not the
+     arguments need to be popped.)
+
+     When INHIBIT_DEFER_POP is nonzero, however, the compiler does not
+     attempt to defer pops.  Instead, the stack is popped immediately
+     after each call.  Rather then setting this variable directly, use
+     NO_DEFER_POP and OK_DEFER_POP.  */
+  int x_inhibit_defer_pop;
+
+  /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack
+     boundary can be momentarily unaligned while pushing the arguments.
+     Record the delta since last aligned boundary here in order to get
+     stack alignment in the nested function calls working right.  */
+  int x_stack_pointer_delta;
+
+  /* Nonzero means __builtin_saveregs has already been done in this function.
+     The value is the pseudoreg containing the value __builtin_saveregs
+     returned.  */
+  rtx x_saveregs_value;
+
+  /* Similarly for __builtin_apply_args.  */
+  rtx x_apply_args_value;
+
+  /* List of labels that must never be deleted.  */
+  rtx x_forced_labels;
+};
+
+#define pending_stack_adjust (cfun->expr->x_pending_stack_adjust)
+#define inhibit_defer_pop (cfun->expr->x_inhibit_defer_pop)
+#define saveregs_value (cfun->expr->x_saveregs_value)
+#define apply_args_value (cfun->expr->x_apply_args_value)
+#define forced_labels (cfun->expr->x_forced_labels)
+#define stack_pointer_delta (cfun->expr->x_stack_pointer_delta)
+
+struct temp_slot;
+typedef struct temp_slot *temp_slot_p;
+
+DEF_VEC_P(temp_slot_p);
+DEF_VEC_ALLOC_P(temp_slot_p,gc);
+
+enum function_frequency {
+  /* This function most likely won't be executed at all.
+     (set only when profile feedback is available).  */
+  FUNCTION_FREQUENCY_UNLIKELY_EXECUTED,
+  /* The default value.  */
+  FUNCTION_FREQUENCY_NORMAL,
+  /* Optimize this function hard
+     (set only when profile feedback is available).  */
+  FUNCTION_FREQUENCY_HOT
+};
+
+/* This structure can save all the important global and static variables
+   describing the status of the current function.  */
+
+struct function GTY(())
+{
+  struct eh_status *eh;
+  struct expr_status *expr;
+  struct emit_status *emit;
+  struct varasm_status *varasm;
+
+  /* The control flow graph for this function.  */
+  struct control_flow_graph *cfg;
+
+  /* For function.c.  */
+
+  /* Points to the FUNCTION_DECL of this function.  */
+  tree decl;
+
+  /* Function containing this function, if any.  */
+  struct function *outer;
+
+  /* Number of bytes of args popped by function being compiled on its return.
+     Zero if no bytes are to be popped.
+     May affect compilation of return insn or of function epilogue.  */
+  int pops_args;
+
+  /* If function's args have a fixed size, this is that size, in bytes.
+     Otherwise, it is -1.
+     May affect compilation of return insn or of function epilogue.  */
+  int args_size;
+
+  /* # bytes the prologue should push and pretend that the caller pushed them.
+     The prologue must do this, but only if parms can be passed in
+     registers.  */
+  int pretend_args_size;
+
+  /* # of bytes of outgoing arguments.  If ACCUMULATE_OUTGOING_ARGS is
+     defined, the needed space is pushed by the prologue.  */
+  int outgoing_args_size;
+
+  /* This is the offset from the arg pointer to the place where the first
+     anonymous arg can be found, if there is one.  */
+  rtx arg_offset_rtx;
+
+  /* Quantities of various kinds of registers
+     used for the current function's args.  */
+  CUMULATIVE_ARGS args_info;
+
+  /* If nonzero, an RTL expression for the location at which the current
+     function returns its result.  If the current function returns its
+     result in a register, current_function_return_rtx will always be
+     the hard register containing the result.  */
+  rtx return_rtx;
+
+  /* The arg pointer hard register, or the pseudo into which it was copied.  */
+  rtx internal_arg_pointer;
+
+  /* Opaque pointer used by get_hard_reg_initial_val and
+     has_hard_reg_initial_val (see integrate.[hc]).  */
+  struct initial_value_struct *hard_reg_initial_vals;
+
+  /* List (chain of EXPR_LIST) of labels heading the current handlers for
+     nonlocal gotos.  */
+  rtx x_nonlocal_goto_handler_labels;
+
+  /* Label that will go on function epilogue.
+     Jumping to this label serves as a "return" instruction
+     on machines which require execution of the epilogue on all returns.  */
+  rtx x_return_label;
+
+  /* Label that will go on the end of function epilogue.
+     Jumping to this label serves as a "naked return" instruction
+     on machines which require execution of the epilogue on all returns.  */
+  rtx x_naked_return_label;
+
+  /* List (chain of EXPR_LISTs) of all stack slots in this function.
+     Made for the sake of unshare_all_rtl.  */
+  rtx x_stack_slot_list;
+
+  /* Place after which to insert the tail_recursion_label if we need one.  */
+  rtx x_stack_check_probe_note;
+
+  /* Location at which to save the argument pointer if it will need to be
+     referenced.  There are two cases where this is done: if nonlocal gotos
+     exist, or if vars stored at an offset from the argument pointer will be
+     needed by inner routines.  */
+  rtx x_arg_pointer_save_area;
+
+  /* Offset to end of allocated area of stack frame.
+     If stack grows down, this is the address of the last stack slot allocated.
+     If stack grows up, this is the address for the next slot.  */
+  HOST_WIDE_INT x_frame_offset;
+
+  /* A PARM_DECL that should contain the static chain for this function.
+     It will be initialized at the beginning of the function.  */
+  tree static_chain_decl;
+
+  /* An expression that contains the non-local goto save area.  The first
+     word is the saved frame pointer and the second is the saved stack 
+     pointer.  */
+  tree nonlocal_goto_save_area;
+
+  /* Insn after which register parms and SAVE_EXPRs are born, if nonopt.  */
+  rtx x_parm_birth_insn;
+
+  /* List of all used temporaries allocated, by level.  */
+  VEC(temp_slot_p,gc) *x_used_temp_slots;
+
+  /* List of available temp slots.  */
+  struct temp_slot *x_avail_temp_slots;
+
+  /* This slot is initialized as 0 and is added to
+     during the nested function.  */
+  struct var_refs_queue *fixup_var_refs_queue;
+
+  /* Current nesting level for temporaries.  */
+  int x_temp_slot_level;
+
+  /* Highest label number in current function.  */
+  int inl_max_label_num;
+
+  /* Function sequence number for profiling, debugging, etc.  */
+  int funcdef_no;
+
+  /* For flow.c.  */
+
+  /* Highest loop depth seen so far in loop analysis.  Used in flow.c
+     for the "failure strategy" when doing liveness analysis starting
+     with non-empty initial sets.  */
+  int max_loop_depth;
+
+  /* For md files.  */
+
+  /* tm.h can use this to store whatever it likes.  */
+  struct machine_function * GTY ((maybe_undef)) machine;
+
+  /* The largest alignment of slot allocated on the stack.  */
+  unsigned int stack_alignment_needed;
+
+  /* Preferred alignment of the end of stack frame.  */
+  unsigned int preferred_stack_boundary;
+
+  /* Language-specific code can use this to store whatever it likes.  */
+  struct language_function * language;
+
+  /* Used types hash table.  */
+  htab_t GTY ((param_is (union tree_node))) used_types_hash;
+
+  /* For reorg.  */
+
+  /* If some insns can be deferred to the delay slots of the epilogue, the
+     delay list for them is recorded here.  */
+  rtx epilogue_delay_list;
+
+  /* Maximal number of entities in the single jumptable.  Used to estimate
+     final flowgraph size.  */
+  int max_jumptable_ents;
+
+  /* UIDs for LABEL_DECLs.  */
+  int last_label_uid;
+
+  /* Line number of the end of the function.  */
+  location_t function_end_locus;
+
+  /* Array mapping insn uids to blocks.  */
+  VEC(tree,gc) *ib_boundaries_block;
+
+  /* The variables unexpanded so far.  */
+  tree unexpanded_var_list;
+
+  /* Assembly labels for the hot and cold text sections, to
+     be used by debugger functions for determining the size of text
+     sections.  */
+
+  const char *hot_section_label;
+  const char *cold_section_label;
+  const char *hot_section_end_label;
+  const char *cold_section_end_label;
+
+  /* String to be used for name of cold text sections, via
+     targetm.asm_out.named_section.  */
+
+  const char *unlikely_text_section_name;
+
+  /* A variable living at the top of the frame that holds a known value.
+     Used for detecting stack clobbers.  */
+  tree stack_protect_guard;
+
+  /* Collected bit flags.  */
+
+  /* Nonzero if function being compiled needs to be given an address
+     where the value should be stored.  */
+  unsigned int returns_struct : 1;
+
+  /* Nonzero if function being compiled needs to
+     return the address of where it has put a structure value.  */
+  unsigned int returns_pcc_struct : 1;
+
+  /* Nonzero if the current function returns a pointer type.  */
+  unsigned int returns_pointer : 1;
+
+  /* Nonzero if function being compiled can call setjmp.  */
+  unsigned int calls_setjmp : 1;
+
+  /* Nonzero if function being compiled can call alloca,
+     either as a subroutine or builtin.  */
+  unsigned int calls_alloca : 1;
+
+  /* Nonzero if function being compiled called builtin_return_addr or
+     builtin_frame_address with nonzero count.  */
+  unsigned int accesses_prior_frames : 1;
+
+  /* Nonzero if the function calls __builtin_eh_return.  */
+  unsigned int calls_eh_return : 1;
+
+  /* Nonzero if function being compiled receives nonlocal gotos
+     from nested functions.  */
+  unsigned int has_nonlocal_label : 1;
+
+  /* Nonzero if function being compiled has nonlocal gotos to parent
+     function.  */
+  unsigned int has_nonlocal_goto : 1;
+
+  /* Nonzero if the current function is a thunk, i.e., a lightweight
+     function implemented by the output_mi_thunk hook) that just
+     adjusts one of its arguments and forwards to another
+     function.  */
+  unsigned int is_thunk : 1;
+
+  /* This bit is used by the exception handling logic.  It is set if all
+     calls (if any) are sibling calls.  Such functions do not have to
+     have EH tables generated, as they cannot throw.  A call to such a
+     function, however, should be treated as throwing if any of its callees
+     can throw.  */
+  unsigned int all_throwers_are_sibcalls : 1;
+
+  /* Nonzero if profiling code should be generated.  */
+  unsigned int profile : 1;
+
+  /* Nonzero if stack limit checking should be enabled in the current
+     function.  */
+  unsigned int limit_stack : 1;
+
+  /* Nonzero if current function uses stdarg.h or equivalent.  */
+  unsigned int stdarg : 1;
+
+  /* Nonzero if the back-end should not keep track of expressions that
+     determine the size of variable-sized objects.  Normally, such
+     expressions are saved away, and then expanded when the next
+     function is started.  For example, if a parameter has a
+     variable-sized type, then the size of the parameter is computed
+     when the function body is entered.  However, some front-ends do
+     not desire this behavior.  */
+  unsigned int x_dont_save_pending_sizes_p : 1;
+
+  /* Nonzero if the current function uses the constant pool.  */
+  unsigned int uses_const_pool : 1;
+
+  /* Nonzero if the current function uses pic_offset_table_rtx.  */
+  unsigned int uses_pic_offset_table : 1;
+
+  /* Nonzero if the current function needs an lsda for exception handling.  */
+  unsigned int uses_eh_lsda : 1;
+
+  /* Nonzero if code to initialize arg_pointer_save_area has been emitted.  */
+  unsigned int arg_pointer_save_area_init : 1;
+
+  unsigned int after_inlining : 1;
+
+  /* Set when the call to function itself has been emit.  */
+  unsigned int recursive_call_emit : 1;
+
+  /* Set when the tail call has been produced.  */
+  unsigned int tail_call_emit : 1;
+
+  /* How commonly executed the function is.  Initialized during branch
+     probabilities pass.  */
+  ENUM_BITFIELD (function_frequency) function_frequency : 2;
+
+  /* Number of units of general registers that need saving in stdarg
+     function.  What unit is depends on the backend, either it is number
+     of bytes, or it can be number of registers.  */
+  unsigned int va_list_gpr_size : 8;
+
+  /* Number of units of floating point registers that need saving in stdarg
+     function.  */
+  unsigned int va_list_fpr_size : 8;
+};
+
+/* If va_list_[gf]pr_size is set to this, it means we don't know how
+   many units need to be saved.  */
+#define VA_LIST_MAX_GPR_SIZE	255
+#define VA_LIST_MAX_FPR_SIZE	255
+
+/* The function currently being compiled.  */
+extern GTY(()) struct function *cfun;
+
+/* Pointer to chain of `struct function' for containing functions.  */
+extern GTY(()) struct function *outer_function_chain;
+
+/* Nonzero if we've already converted virtual regs to hard regs.  */
+extern int virtuals_instantiated;
+
+/* Nonzero if at least one trampoline has been created.  */
+extern int trampolines_created;
+
+/* For backward compatibility... eventually these should all go away.  */
+#define current_function_pops_args (cfun->pops_args)
+#define current_function_returns_struct (cfun->returns_struct)
+#define current_function_returns_pcc_struct (cfun->returns_pcc_struct)
+#define current_function_returns_pointer (cfun->returns_pointer)
+#define current_function_calls_setjmp (cfun->calls_setjmp)
+#define current_function_calls_alloca (cfun->calls_alloca)
+#define current_function_accesses_prior_frames (cfun->accesses_prior_frames)
+#define current_function_calls_eh_return (cfun->calls_eh_return)
+#define current_function_is_thunk (cfun->is_thunk)
+#define current_function_args_info (cfun->args_info)
+#define current_function_args_size (cfun->args_size)
+#define current_function_pretend_args_size (cfun->pretend_args_size)
+#define current_function_outgoing_args_size (cfun->outgoing_args_size)
+#define current_function_arg_offset_rtx (cfun->arg_offset_rtx)
+#define current_function_stdarg (cfun->stdarg)
+#define current_function_internal_arg_pointer (cfun->internal_arg_pointer)
+#define current_function_return_rtx (cfun->return_rtx)
+#define current_function_profile (cfun->profile)
+#define current_function_funcdef_no (cfun->funcdef_no)
+#define current_function_limit_stack (cfun->limit_stack)
+#define current_function_uses_pic_offset_table (cfun->uses_pic_offset_table)
+#define current_function_uses_const_pool (cfun->uses_const_pool)
+#define current_function_epilogue_delay_list (cfun->epilogue_delay_list)
+#define current_function_has_nonlocal_label (cfun->has_nonlocal_label)
+#define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
+
+#define return_label (cfun->x_return_label)
+#define naked_return_label (cfun->x_naked_return_label)
+#define stack_slot_list (cfun->x_stack_slot_list)
+#define parm_birth_insn (cfun->x_parm_birth_insn)
+#define frame_offset (cfun->x_frame_offset)
+#define stack_check_probe_note (cfun->x_stack_check_probe_note)
+#define arg_pointer_save_area (cfun->x_arg_pointer_save_area)
+#define used_temp_slots (cfun->x_used_temp_slots)
+#define avail_temp_slots (cfun->x_avail_temp_slots)
+#define temp_slot_level (cfun->x_temp_slot_level)
+#define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels)
+
+/* Given a function decl for a containing function,
+   return the `struct function' for it.  */
+struct function *find_function_data (tree);
+
+/* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
+   and create duplicate blocks.  */
+extern void reorder_blocks (void);
+
+/* Set BLOCK_NUMBER for all the blocks in FN.  */
+extern void number_blocks (tree);
+
+extern void clear_block_marks (tree);
+extern tree blocks_nreverse (tree);
+extern void reset_block_changes (void);
+extern void record_block_change (tree);
+extern void finalize_block_changes (void);
+extern void check_block_change (rtx, tree *);
+extern void free_block_changes (void);
+
+/* Return size needed for stack frame based on slots so far allocated.
+   This size counts from zero.  It is not rounded to STACK_BOUNDARY;
+   the caller may have to do that.  */
+extern HOST_WIDE_INT get_frame_size (void);
+
+/* Issue an error message and return TRUE if frame OFFSET overflows in
+   the signed target pointer arithmetics for function FUNC.  Otherwise
+   return FALSE.  */
+extern bool frame_offset_overflow (HOST_WIDE_INT, tree);
+
+/* A pointer to a function to create target specific, per-function
+   data structures.  */
+extern struct machine_function * (*init_machine_status) (void);
+
+/* Save and restore status information for a nested function.  */
+extern void free_after_parsing (struct function *);
+extern void free_after_compilation (struct function *);
+
+extern void init_varasm_status (struct function *);
+
+#ifdef RTX_CODE
+extern void diddle_return_value (void (*)(rtx, void*), void*);
+extern void clobber_return_register (void);
+#endif
+
+extern rtx get_arg_pointer_save_area (struct function *);
+
+/* Returns the name of the current function.  */
+extern const char *current_function_name (void);
+
+extern void do_warn_unused_parameter (tree);
+
+extern bool pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
+			       tree, bool);
+extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode,
+				     tree, bool);
+
+extern void used_types_insert (tree);
+
+#endif  /* GCC_FUNCTION_H */