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* tree-vrp.c (simplify_abs_using_ranges): Simplify. 

From-SVN: r226779
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Nathan Sidwell 2015-08-11 12:34:43 +00:00 committed by Nathan Sidwell
parent a6810021af
commit 8299dd5cbb
2 changed files with 11 additions and 21 deletions
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2
gcc/ChangeLog
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@ -1,5 +1,7 @@
2015-08-11 Nathan Sidwell <nathan@acm.org>
* tree-vrp.c (simplify_abs_using_ranges): Simplify.
* tree-ssa-phiopt.c (minmax_replacement): Create new ssa name if
we're not the only contributor to target phi.

30
gcc/tree-vrp.c
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@ -9152,37 +9152,25 @@ simplify_div_or_mod_using_ranges (gimple stmt)
static bool
simplify_abs_using_ranges (gimple stmt)
{
tree val = NULL;
tree op = gimple_assign_rhs1 (stmt);
tree type = TREE_TYPE (op);
value_range_t *vr = get_value_range (op);
if (TYPE_UNSIGNED (type))
{
val = integer_zero_node;
}
else if (vr)
if (vr)
{
tree val = NULL;
bool sop = false;
val = compare_range_with_value (LE_EXPR, vr, integer_zero_node, &sop);
if (!val)
{
/* The range is neither <= 0 nor > 0. Now see if it is
either < 0 or >= 0. */
sop = false;
val = compare_range_with_value (GE_EXPR, vr, integer_zero_node,
val = compare_range_with_value (LT_EXPR, vr, integer_zero_node,
&sop);
if (val)
{
if (integer_zerop (val))
val = integer_one_node;
else if (integer_onep (val))
val = integer_zero_node;
}
}
if (val
&& (integer_onep (val) || integer_zerop (val)))
if (val)
{
if (sop && issue_strict_overflow_warning (WARN_STRICT_OVERFLOW_MISC))
{
@ -9198,10 +9186,10 @@ simplify_abs_using_ranges (gimple stmt)
}
gimple_assign_set_rhs1 (stmt, op);
if (integer_onep (val))
gimple_assign_set_rhs_code (stmt, NEGATE_EXPR);
else
if (integer_zerop (val))
gimple_assign_set_rhs_code (stmt, SSA_NAME);
else
gimple_assign_set_rhs_code (stmt, NEGATE_EXPR);
update_stmt (stmt);
return true;
}