Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the

non-i386, non-unix, and generatable files have been trimmed, but can easily
be added in later if needed.

gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's
handy to have both available for reference for such little cost.

The freebsd-specific changes will then be committed, and once the dust has
settled, the bmakefiles will be committed to use this code.

1 files changed, 126 insertions, 0 deletions

diff --git a/contrib/gcc/integrate.h b/contrib/gcc/integrate.h
new file mode 100644
index 0000000..2b14f88
--- /dev/null
+++ b/contrib/gcc/integrate.h
@@ -0,0 +1,126 @@
+/* Function integration definitions for GNU C-Compiler
+   Copyright (C) 1990 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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 GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* 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 registers to new registers.
+     It is allocated and deallocated in `expand_inline_function' */
+  rtx *reg_map;
+  /* 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.  */
+  rtx *const_equiv_map;
+  /* Number of entries in const_equiv_map and const_arg_map.  */
+  int const_equiv_map_size;
+  /* This is incremented for each new basic block.
+     It is used to store in const_age_map to record the domain of validity
+     of each entry in const_equiv_map.
+     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;
+  /* In parallel with const_equiv_map, record the valid age for each entry.
+     The entry is invalid if its age is less than const_age.  */
+  unsigned int *const_age_map;
+  /* 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;
+
+  /* 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
+};
+
+/* Return a copy of an rtx (as needed), substituting pseudo-register,
+   labels, and frame-pointer offsets as necessary.  */
+extern rtx copy_rtx_and_substitute PROTO((rtx, struct inline_remap *));
+
+extern void try_constants PROTO((rtx, struct inline_remap *));
+
+extern void mark_stores PROTO((rtx, rtx));
+
+/* Unfortunately, we need a global copy of const_equiv map for communication
+   with a function called from note_stores.  Be *very* careful that this
+   is used properly in the presence of recursion.  */
+
+extern rtx *global_const_equiv_map;
+extern int global_const_equiv_map_size;