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Normalize unsigned ~[0,0] into [1,MAX].

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From-SVN: r276949
This commit is contained in:
Aldy Hernandez 2019-10-14 06:43:03 +00:00 committed by Aldy Hernandez
parent 103197a183
commit dede82f21b
5 changed files with 34 additions and 15 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2019-10-14 Aldy Hernandez <aldyh@redhat.com>
* tree-vrp.c (value_range_base::set): Normalize unsigned ~[0,0]
into [1,MAX].
* tree-vrp.h (value_range_base::nonzero_p): Adjust for unsigned
non-zero being represented as [1,MAX].
2019-10-14 Xiong Hu Luo <luoxhu@linux.ibm.com>
* tree-sra.c (dump_access): Add missing braces.

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-10-14 Aldy Hernandez <aldyh@redhat.com>
* gcc.dg/tree-ssa/evrp4.c: Adjust for unsigned non-zero being
[1,MAX].
2019-10-13 Iain Sandoe <iain@sandoe.co.uk>
* gcc.target/i386/indirect-thunk-1.c: Allow 'l' or 'L' in

2
gcc/testsuite/gcc.dg/tree-ssa/evrp4.c
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@ -17,4 +17,4 @@ int bar (struct st *s)
foo (&s->a);
}
/* { dg-final { scan-tree-dump "\~\\\[0B, 0B\\\]" "evrp" } } */
/* { dg-final { scan-tree-dump "\\\[1B, -1B\\\]" "evrp" } } */

8
gcc/tree-vrp.c
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@ -800,13 +800,13 @@ value_range_base::set (enum value_range_kind kind, tree min, tree max)
kind = VR_RANGE;
}
else if (is_min
/* As a special exception preserve non-null ranges. */
&& !(TYPE_UNSIGNED (TREE_TYPE (min))
&& integer_zerop (max)))
/* Allow non-zero pointers to be normalized to [1,MAX]. */
|| (POINTER_TYPE_P (TREE_TYPE (min))
&& integer_zerop (min)))
{
tree one = build_int_cst (TREE_TYPE (max), 1);
min = int_const_binop (PLUS_EXPR, max, one);
max = vrp_val_max (TREE_TYPE (max));
max = vrp_val_max (TREE_TYPE (max), true);
kind = VR_RANGE;
}
else if (is_max)

27
gcc/tree-vrp.h
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@ -245,16 +245,6 @@ value_range_base::zero_p () const
&& integer_zerop (m_max));
}
/* Return TRUE if range is nonzero. */
inline bool
value_range_base::nonzero_p () const
{
return (m_kind == VR_ANTI_RANGE
&& integer_zerop (m_min)
&& integer_zerop (m_max));
}
extern void dump_value_range (FILE *, const value_range *);
extern void dump_value_range (FILE *, const value_range_base *);
@ -322,6 +312,23 @@ extern tree get_single_symbol (tree, bool *, tree *);
extern void maybe_set_nonzero_bits (edge, tree);
extern value_range_kind determine_value_range (tree, wide_int *, wide_int *);
/* Return TRUE if range is nonzero. */
inline bool
value_range_base::nonzero_p () const
{
if (m_kind == VR_ANTI_RANGE
&& !TYPE_UNSIGNED (type ())
&& integer_zerop (m_min)
&& integer_zerop (m_max))
return true;
return (m_kind == VR_RANGE
&& TYPE_UNSIGNED (type ())
&& integer_onep (m_min)
&& vrp_val_is_max (m_max, true));
}
/* Return TRUE if *VR includes the value zero. */
inline bool