gcc/ChangeLog:
* value-range.cc (get_bound_with_infinite_markers): New static helper.
(irange::as_string): New definition.
* value-range.h: New declaration.
---
Provide means to print a value range to a newly allocated buffer.
The caller is responsible to free() the allocated memory.
Bootstrapped and regtested on x86_86-unknown-linux with no regressions.
Ok for trunk?
Cc: Andrew MacLeod <amacl...@redhat.com>
Cc: Aldy Hernandez <al...@redhat.com>
---
gcc/value-range.cc | 56 ++++++++++++++++++++++++++++++++++++++++++++++
gcc/value-range.h | 3 +++
2 files changed, 59 insertions(+)
diff --git a/gcc/value-range.cc b/gcc/value-range.cc
index a855aaf626c..51cd9a38d90 100644
--- a/gcc/value-range.cc
+++ b/gcc/value-range.cc
@@ -3099,6 +3099,62 @@ debug (const value_range &vr)
fprintf (stderr, "\n");
}
+/* Helper for irange::as_string(). Print a bound to an allocated buffer. */
+static char *
+get_bound_with_infinite_markers (tree bound)
+{
+ tree type = TREE_TYPE (bound);
+ wide_int type_min = wi::min_value (TYPE_PRECISION (type), TYPE_SIGN (type));
+ wide_int type_max = wi::max_value (TYPE_PRECISION (type), TYPE_SIGN (type));
+
+ if (INTEGRAL_TYPE_P (type)
+ && !TYPE_UNSIGNED (type)
+ && TREE_CODE (bound) == INTEGER_CST
+ && wi::to_wide (bound) == type_min
+ && TYPE_PRECISION (type) != 1)
+ return xstrdup ("-INF");
+ else if (TREE_CODE (bound) == INTEGER_CST
+ && wi::to_wide (bound) == type_max
+ && TYPE_PRECISION (type) != 1)
+ return xstrdup ("+INF");
+ else
+ return print_generic_expr_to_str (bound);
+}
+
+
+/* Return an irange as string. Return NULL on failure, an allocated
+ string on success. */
+char *
+irange::as_string ()
+{
+ char *ret = NULL;
+ if (undefined_p() || varying_p () || m_num_ranges == 0)
+ return ret;
+
+ for (unsigned i = 0; i < m_num_ranges; ++i)
+ {
+ tree lb = m_base[i * 2];
+ tree ub = m_base[i * 2 + 1];
+ /* Construct [lower_bound,upper_bound]. */
+ char *lbs = get_bound_with_infinite_markers (lb);
+ char *ubs = get_bound_with_infinite_markers (ub);
+ /* Paranoia mode */
+ if (!lbs)
+ lbs = xstrdup ("");
+ if (!ubs)
+ ubs = xstrdup ("");
+
+ if (ret)
+ ret = reconcat (ret, ret, "[", lbs, ",", ubs, "]", NULL);
+ else
+ ret = concat ("[", lbs, ",", ubs, "]", NULL);
+
+ free (lbs);
+ free (ubs);
+ }
+ return ret;
+}
+
/* Create two value-ranges in *VR0 and *VR1 from the anti-range *AR
so that *VR0 U *VR1 == *AR. Returns true if that is possible,
false otherwise. If *AR can be represented with a single range
diff --git a/gcc/value-range.h b/gcc/value-range.h
index c87734dd8cd..76242e4bf45 100644
--- a/gcc/value-range.h
+++ b/gcc/value-range.h
@@ -160,6 +160,9 @@ public:
wide_int get_nonzero_bits () const;
void set_nonzero_bits (const wide_int_ref &bits);
+ // For diagnostics.
+ char *as_string ();
+
// Deprecated legacy public methods.
tree min () const; // DEPRECATED
tree max () const; // DEPRECATED
--
2.38.1
