Makefile.in (OBJECTS): Add sbitmap.o.

        * Makefile.in (OBJECTS): Add sbitmap.o.
        (BASIC_BLOCK_H): Add sbitmap.h.
        * basic-block.h: Move simple bitmap code to sbitmap.h.
        * flow.c: Move simple bitmap code to sbitmap.c
        * sbitmap.h, sbitmap.c: New files.

From-SVN: r24628

1 files changed, 122 insertions, 0 deletions

diff --git a/gcc/sbitmap.h b/gcc/sbitmap.h
new file mode 100644
index 0000000..350142d
--- /dev/null
+++ b/gcc/sbitmap.h
@@ -0,0 +1,122 @@
+/* Simple bitmaps.
+   Copyright (C) 1999 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.  */
+
+/* It's not clear yet whether using bitmap.[ch] will be a win.
+   It should be straightforward to convert so for now we keep things simple
+   while more important issues are dealt with.  */
+
+#define SBITMAP_ELT_BITS HOST_BITS_PER_WIDE_INT
+#define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT
+
+typedef struct simple_bitmap_def {
+  /* Number of bits.  */
+  int n_bits;
+  /* Size in elements.  */
+  int size;
+  /* Size in bytes.  */
+  int bytes;
+  /* The elements.  */
+  SBITMAP_ELT_TYPE elms[1];
+} *sbitmap;
+
+typedef SBITMAP_ELT_TYPE *sbitmap_ptr;
+
+/* Return the set size needed for N elements.  */
+#define SBITMAP_SET_SIZE(n) (((n) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)
+
+/* set bit number bitno in the bitmap */
+#define SET_BIT(bitmap, bitno)					\
+  ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS]			\
+   |= (SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS)
+
+/* test if bit number bitno in the bitmap is set */
+#define TEST_BIT(bitmap, bitno) \
+((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] >> (bitno) % SBITMAP_ELT_BITS & 1)
+
+/* reset bit number bitno in the bitmap  */
+#define RESET_BIT(bitmap, bitno)				\
+  ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS]			\
+   &= ~((SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS))
+
+/* Loop over all elements of SBITSET, starting with MIN.  */
+#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE)		\
+do {									\
+  unsigned int bit_num_ = (MIN) % (unsigned) SBITMAP_ELT_BITS;		\
+  unsigned int word_num_ = (MIN) / (unsigned) SBITMAP_ELT_BITS;		\
+  unsigned int size_ = (SBITMAP)->size;					\
+  SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;				\
+									\
+  while (word_num_ < size_)						\
+    {									\
+      SBITMAP_ELT_TYPE word_ = ptr_[word_num_];				\
+      if (word_ != 0)							\
+	{								\
+	  for (; bit_num_ < SBITMAP_ELT_BITS; ++bit_num_)		\
+	    {								\
+	      SBITMAP_ELT_TYPE mask_ = (SBITMAP_ELT_TYPE)1 << bit_num_;	\
+	      if ((word_ & mask_) != 0)					\
+		{							\
+		  word_ &= ~mask_;					\
+		  (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_;	\
+		  CODE;							\
+		  if (word_ == 0)					\
+		    break;						\
+		}							\
+	    }								\
+	}								\
+      bit_num_ = 0;							\
+      word_num_++;							\
+   }									\
+} while (0)
+
+#define sbitmap_free(map)		free(map)
+#define sbitmap_vector_free(vec)	free(vec)
+
+extern void dump_sbitmap PROTO ((FILE *, sbitmap));
+extern void dump_sbitmap_vector PROTO ((FILE *, char *, char *,
+					sbitmap *, int));
+
+extern sbitmap sbitmap_alloc PROTO ((int));
+extern sbitmap *sbitmap_vector_alloc PROTO ((int, int));
+
+extern void sbitmap_copy PROTO ((sbitmap, sbitmap));
+extern void sbitmap_zero PROTO ((sbitmap));
+extern void sbitmap_ones PROTO ((sbitmap));
+extern void sbitmap_vector_zero PROTO ((sbitmap *, int));
+extern void sbitmap_vector_ones PROTO ((sbitmap *, int));
+
+extern int sbitmap_union_of_diff PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
+extern void sbitmap_difference PROTO ((sbitmap, sbitmap, sbitmap));
+extern void sbitmap_not PROTO ((sbitmap, sbitmap));
+extern int sbitmap_a_or_b_and_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
+extern int sbitmap_a_and_b_or_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
+extern int sbitmap_a_and_b PROTO ((sbitmap, sbitmap, sbitmap));
+extern int sbitmap_a_or_b PROTO ((sbitmap, sbitmap, sbitmap));
+
+struct int_list;
+extern void sbitmap_intersect_of_predsucc PROTO ((sbitmap, sbitmap *,
+						  int, struct int_list **));
+#define sbitmap_intersect_of_predecessors  sbitmap_intersect_of_predsucc
+#define sbitmap_intersect_of_successors    sbitmap_intersect_of_predsucc
+
+extern void sbitmap_union_of_predsucc PROTO ((sbitmap, sbitmap *, int,
+					      struct int_list **));
+#define sbitmap_union_of_predecessors  sbitmap_union_of_predsucc
+#define sbitmap_union_of_successors    sbitmap_union_of_predsucc