defaults.h (LOG2_BITS_PER_UNIT): Move from here...

2016-07-27  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * defaults.h (LOG2_BITS_PER_UNIT): Move from here...
        * tree.h (LOG2_BITS_PER_UNIT): ...to here.
        (BITS_PER_UNIT_LOG): Remove.
        (int_bit_position): Use LOG2_BITS_PER_UNIT instead of BITS_PER_UNIT_LOG.
        * expr.c (expand_assignment): Likewise. 
        * stor-layout.c (initialize_sizetypes): Likewise.

c-family:
2016-07-27  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * c-common.c (check_user_alignment): Use LOG2_BITS_PER_UNIT instead of
        BITS_PER_UNIT_LOG.

From-SVN: r238800

gcc/ChangeLog

+2016-07-27  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* defaults.h (LOG2_BITS_PER_UNIT): Move from here...
+	* tree.h (LOG2_BITS_PER_UNIT): ...to here.
+	(BITS_PER_UNIT_LOG): Remove.
+	(int_bit_position): Use LOG2_BITS_PER_UNIT instead of BITS_PER_UNIT_LOG.
+	* expr.c (expand_assignment): Likewise.
+	* stor-layout.c (initialize_sizetypes): Likewise.
+
 2016-07-27  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	* config/rs6000/vector.md (vec_extract<mode>): Change the calling

gcc/c-family/ChangeLog

+2016-07-27  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* c-common.c (check_user_alignment): Use LOG2_BITS_PER_UNIT instead of
+	BITS_PER_UNIT_LOG.
+
 2016-07-25  Jason Merrill  <jason@redhat.com>
 
 	PR c++/65970

gcc/c-family/c-common.c

@@ -7679,7 +7679,7 @@ check_user_alignment (const_tree align, bool allow_zero)
       error ("requested alignment is not a positive power of 2");
       return -1;
     }
-  else if (i >= HOST_BITS_PER_INT - BITS_PER_UNIT_LOG)
+  else if (i >= HOST_BITS_PER_INT - LOG2_BITS_PER_UNIT)
     {
       error ("requested alignment is too large");
       return -1;

gcc/defaults.h

@@ -491,14 +491,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    your target, you should override these values by defining the
    appropriate symbols in your tm.h file.  */
 
-#if BITS_PER_UNIT == 8
-#define LOG2_BITS_PER_UNIT 3
-#elif BITS_PER_UNIT == 16
-#define LOG2_BITS_PER_UNIT 4
-#else
-#error Unknown BITS_PER_UNIT
-#endif
-
 #ifndef BITS_PER_WORD
 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 #endif

gcc/expr.c

@@ -4990,8 +4990,7 @@ expand_assignment (tree to, tree from, bool nontemporal)
       if (bitpos < 0)
 	{
 	  gcc_assert (offset == NULL_TREE);
-	  offset = size_int (bitpos >> (BITS_PER_UNIT == 8
-					? 3 : exact_log2 (BITS_PER_UNIT)));
+	  offset = size_int (bitpos >> LOG2_BITS_PER_UNIT);
 	  bitpos &= BITS_PER_UNIT - 1;
 	}
 

gcc/stor-layout.c

@@ -2572,7 +2572,7 @@ initialize_sizetypes (void)
     }
 
   bprecision
-    = MIN (precision + BITS_PER_UNIT_LOG + 1, MAX_FIXED_MODE_SIZE);
+    = MIN (precision + LOG2_BITS_PER_UNIT + 1, MAX_FIXED_MODE_SIZE);
   bprecision
     = GET_MODE_PRECISION (smallest_mode_for_size (bprecision, MODE_INT));
   if (bprecision > HOST_BITS_PER_DOUBLE_INT)

gcc/tree.h

@@ -4235,6 +4235,8 @@ extern tree bit_position (const_tree);
 extern tree byte_position (const_tree);
 extern HOST_WIDE_INT int_byte_position (const_tree);
 
+/* Type for sizes of data-type.  */
+
 #define sizetype sizetype_tab[(int) stk_sizetype]
 #define bitsizetype sizetype_tab[(int) stk_bitsizetype]
 #define ssizetype sizetype_tab[(int) stk_ssizetype]
@@ -4244,12 +4246,15 @@ extern HOST_WIDE_INT int_byte_position (const_tree);
 #define bitsize_int(L) size_int_kind (L, stk_bitsizetype)
 #define sbitsize_int(L) size_int_kind (L, stk_sbitsizetype)
 
-/* Type for sizes of data-type.  */
+/* Log2 of BITS_PER_UNIT.  */
 
-#define BITS_PER_UNIT_LOG \
-  ((BITS_PER_UNIT > 1) + (BITS_PER_UNIT > 2) + (BITS_PER_UNIT > 4) \
-   + (BITS_PER_UNIT > 8) + (BITS_PER_UNIT > 16) + (BITS_PER_UNIT > 32) \
-   + (BITS_PER_UNIT > 64) + (BITS_PER_UNIT > 128) + (BITS_PER_UNIT > 256))
+#if BITS_PER_UNIT == 8
+#define LOG2_BITS_PER_UNIT 3
+#elif BITS_PER_UNIT == 16
+#define LOG2_BITS_PER_UNIT 4
+#else
+#error Unknown BITS_PER_UNIT
+#endif
 
 /* Concatenate two lists (chains of TREE_LIST nodes) X and Y
    by making the last node in X point to Y.
@@ -5400,8 +5405,8 @@ extern GTY(()) struct int_n_trees_t int_n_trees[NUM_INT_N_ENTS];
 
 inline HOST_WIDE_INT
 int_bit_position (const_tree field)
-{ 
-  return ((wi::to_offset (DECL_FIELD_OFFSET (field)) << BITS_PER_UNIT_LOG)
+{
+  return ((wi::to_offset (DECL_FIELD_OFFSET (field)) << LOG2_BITS_PER_UNIT)
 	  + wi::to_offset (DECL_FIELD_BIT_OFFSET (field))).to_shwi ();
 }