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tree-ssa-dom.c (extract_range_from_cond): Deal with variable bounds on types.

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* tree-ssa-dom.c (extract_range_from_cond): Deal with variable bounds
	on types.

From-SVN: r107182
This commit is contained in:
Richard Kenner 2005-11-18 13:32:05 +00:00 • committed by Richard Kenner
parent e259b3c2b2
commit 4d14c1f401
2 changed files with 15 additions and 4 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
2005-11-18 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* tree-ssa-dom.c (extract_range_from_cond): Deal with variable bounds
on types.
* expr.c (expand_expr_real): Don't call record_block_change unless
ib_boundaries_block is non-null

16
gcc/tree-ssa-dom.c
View file

@ -3203,10 +3203,7 @@ extract_range_from_cond (tree cond, tree *hi_p, tree *lo_p, int *inverted_p)
record ranges for enumerations. Presumably this is due to
the fact that they're rarely used directly. They are typically
cast into an integer type and used that way. */
if (TREE_CODE (type) != INTEGER_TYPE
/* We don't know how to deal with types with variable bounds. */
|| TREE_CODE (TYPE_MIN_VALUE (type)) != INTEGER_CST
|| TREE_CODE (TYPE_MAX_VALUE (type)) != INTEGER_CST)
if (TREE_CODE (type) != INTEGER_TYPE)
return 0;
switch (TREE_CODE (cond))
@ -3223,12 +3220,19 @@ extract_range_from_cond (tree cond, tree *hi_p, tree *lo_p, int *inverted_p)
case GE_EXPR:
low = op1;
/* Get the highest value of the type. If not a constant, use that
of its base type, if it has one. */
high = TYPE_MAX_VALUE (type);
if (TREE_CODE (high) != INTEGER_CST && TREE_TYPE (type))
high = TYPE_MAX_VALUE (TREE_TYPE (type));
inverted = 0;
break;
case GT_EXPR:
high = TYPE_MAX_VALUE (type);
if (TREE_CODE (high) != INTEGER_CST && TREE_TYPE (type))
high = TYPE_MAX_VALUE (TREE_TYPE (type));
if (!tree_int_cst_lt (op1, high))
return 0;
low = int_const_binop (PLUS_EXPR, op1, integer_one_node, 1);
@ -3238,11 +3242,15 @@ extract_range_from_cond (tree cond, tree *hi_p, tree *lo_p, int *inverted_p)
case LE_EXPR:
high = op1;
low = TYPE_MIN_VALUE (type);
if (TREE_CODE (low) != INTEGER_CST && TREE_TYPE (type))
low = TYPE_MIN_VALUE (TREE_TYPE (type));
inverted = 0;
break;
case LT_EXPR:
low = TYPE_MIN_VALUE (type);
if (TREE_CODE (low) != INTEGER_CST && TREE_TYPE (type))
low = TYPE_MIN_VALUE (TREE_TYPE (type));
if (!tree_int_cst_lt (low, op1))
return 0;
high = int_const_binop (MINUS_EXPR, op1, integer_one_node, 1);