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tree-vrp.c (set_and_canonicalize_value_range): Use canonical predicates to set VR_UNDEFINED and VR_VARYING. 

2012-06-15  Richard Guenther  <rguenther@suse.de>

	* tree-vrp.c (set_and_canonicalize_value_range): Use canonical
	predicates to set VR_UNDEFINED and VR_VARYING.  Drop a case
	we assert for in set_value_range to VR_VARYING.

From-SVN: r188663
This commit is contained in:
Richard Guenther 2012-06-15 13:38:17 +00:00 committed by Richard Biener
parent dae840fcd3
commit ef5ad3b745
2 changed files with 43 additions and 17 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-06-15 Richard Guenther <rguenther@suse.de>
* tree-vrp.c (set_and_canonicalize_value_range): Use canonical
predicates to set VR_UNDEFINED and VR_VARYING. Drop a case
we assert for in set_value_range to VR_VARYING.
2012-06-15 Richard Earnshaw <rearnsha@arm.com>
* arm.md (addsf3, adddf3): Use s_register_operand.

54
gcc/tree-vrp.c
View File

@ -386,6 +386,18 @@ nonnull_arg_p (const_tree arg)
}
/* Set value range VR to VR_UNDEFINED. */
static inline void
set_value_range_to_undefined (value_range_t *vr)
{
vr->type = VR_UNDEFINED;
vr->min = vr->max = NULL_TREE;
if (vr->equiv)
bitmap_clear (vr->equiv);
}
/* Set value range VR to VR_VARYING. */
static inline void
@ -463,10 +475,20 @@ static void
set_and_canonicalize_value_range (value_range_t *vr, enum value_range_type t,
tree min, tree max, bitmap equiv)
{
/* Nothing to canonicalize for symbolic or unknown or varying ranges. */
if ((t != VR_RANGE
&& t != VR_ANTI_RANGE)
|| TREE_CODE (min) != INTEGER_CST
/* Use the canonical setters for VR_UNDEFINED and VR_VARYING. */
if (t == VR_UNDEFINED)
{
set_value_range_to_undefined (vr);
return;
}
else if (t == VR_VARYING)
{
set_value_range_to_varying (vr);
return;
}
/* Nothing to canonicalize for symbolic ranges. */
if (TREE_CODE (min) != INTEGER_CST
|| TREE_CODE (max) != INTEGER_CST)
{
set_value_range (vr, t, min, max, equiv);
@ -502,7 +524,8 @@ set_and_canonicalize_value_range (value_range_t *vr, enum value_range_type t,
if (is_min && is_max)
{
/* We cannot deal with empty ranges, drop to varying. */
/* We cannot deal with empty ranges, drop to varying.
??? This could be VR_UNDEFINED instead. */
set_value_range_to_varying (vr);
return;
}
@ -525,6 +548,15 @@ set_and_canonicalize_value_range (value_range_t *vr, enum value_range_type t,
}
}
/* Drop [-INF(OVF), +INF(OVF)] to varying. */
if (needs_overflow_infinity (TREE_TYPE (min))
&& is_overflow_infinity (min)
&& is_overflow_infinity (max))
{
set_value_range_to_varying (vr);
return;
}
set_value_range (vr, t, min, max, equiv);
}
@ -608,18 +640,6 @@ set_value_range_to_truthvalue (value_range_t *vr, tree type)
}
/* Set value range VR to VR_UNDEFINED. */
static inline void
set_value_range_to_undefined (value_range_t *vr)
{
vr->type = VR_UNDEFINED;
vr->min = vr->max = NULL_TREE;
if (vr->equiv)
bitmap_clear (vr->equiv);
}
/* If abs (min) < abs (max), set VR to [-max, max], if
abs (min) >= abs (max), set VR to [-min, min]. */