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* [gcc r13-5695] range-ops: Handle undefined ranges in frange op[12]_range [PR108647]
@ 2023-02-03 20:31 Aldy Hernandez
0 siblings, 0 replies; only message in thread
From: Aldy Hernandez @ 2023-02-03 20:31 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:10bd26d6efe88a8cf03a6a325351bc470a910cab
commit r13-5695-g10bd26d6efe88a8cf03a6a325351bc470a910cab
Author: Aldy Hernandez <aldyh@redhat.com>
Date: Fri Feb 3 17:28:52 2023 +0100
range-ops: Handle undefined ranges in frange op[12]_range [PR108647]
This patch gracefully handles undefined operand ranges for the floating
point op[12]_range operators. This is very low risk, as we would have
ICEd otherwise.
We don't have a testcase that ICEs for floating point ranges, but it's
only a matter of time. Besides, this dovetails nicely with the integer
versions Jakub is testing.
gcc/ChangeLog:
PR tree-optimization/108647
* range-op-float.cc (foperator_lt::op1_range): Handle undefined ranges.
(foperator_lt::op2_range): Same.
(foperator_le::op1_range): Same.
(foperator_le::op2_range): Same.
(foperator_gt::op1_range): Same.
(foperator_gt::op2_range): Same.
(foperator_ge::op1_range): Same.
(foperator_ge::op2_range): Same.
(foperator_unordered_lt::op1_range): Same.
(foperator_unordered_lt::op2_range): Same.
(foperator_unordered_le::op1_range): Same.
(foperator_unordered_le::op2_range): Same.
(foperator_unordered_gt::op1_range): Same.
(foperator_unordered_gt::op2_range): Same.
(foperator_unordered_ge::op1_range): Same.
(foperator_unordered_ge::op2_range): Same.
Diff:
---
gcc/range-op-float.cc | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc
index 2db83aeb2fc..ff42b95de4f 100644
--- a/gcc/range-op-float.cc
+++ b/gcc/range-op-float.cc
@@ -866,6 +866,8 @@ foperator_lt::op1_range (frange &r,
// The TRUE side of x < NAN is unreachable.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_lt (r, type, op2))
{
r.clear_nan ();
@@ -901,6 +903,8 @@ foperator_lt::op2_range (frange &r,
// The TRUE side of NAN < x is unreachable.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_gt (r, type, op1))
{
r.clear_nan ();
@@ -982,6 +986,8 @@ foperator_le::op1_range (frange &r,
// The TRUE side of x <= NAN is unreachable.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_le (r, type, op2))
r.clear_nan ();
break;
@@ -1013,6 +1019,8 @@ foperator_le::op2_range (frange &r,
// The TRUE side of NAN <= x is unreachable.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_ge (r, type, op1))
r.clear_nan ();
break;
@@ -1021,6 +1029,8 @@ foperator_le::op2_range (frange &r,
// On the FALSE side of NAN <= x, we know nothing about x.
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_lt (r, type, op1);
break;
@@ -1090,6 +1100,8 @@ foperator_gt::op1_range (frange &r,
// The TRUE side of x > NAN is unreachable.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_gt (r, type, op2))
{
r.clear_nan ();
@@ -1102,6 +1114,8 @@ foperator_gt::op1_range (frange &r,
// On the FALSE side of x > NAN, we know nothing about x.
if (op2.known_isnan ())
r.set_varying (type);
+ else if (op2.undefined_p ())
+ return false;
else
build_le (r, type, op2);
break;
@@ -1125,6 +1139,8 @@ foperator_gt::op2_range (frange &r,
// The TRUE side of NAN > x is unreachable.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_lt (r, type, op1))
{
r.clear_nan ();
@@ -1137,6 +1153,8 @@ foperator_gt::op2_range (frange &r,
// On The FALSE side of NAN > x, we know nothing about x.
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_ge (r, type, op1);
break;
@@ -1206,6 +1224,8 @@ foperator_ge::op1_range (frange &r,
// The TRUE side of x >= NAN is unreachable.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_ge (r, type, op2))
r.clear_nan ();
break;
@@ -1214,6 +1234,8 @@ foperator_ge::op1_range (frange &r,
// On the FALSE side of x >= NAN, we know nothing about x.
if (op2.known_isnan ())
r.set_varying (type);
+ else if (op2.undefined_p ())
+ return false;
else
build_lt (r, type, op2);
break;
@@ -1236,6 +1258,8 @@ foperator_ge::op2_range (frange &r, tree type,
// The TRUE side of NAN >= x is unreachable.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_le (r, type, op1))
r.clear_nan ();
break;
@@ -1244,6 +1268,8 @@ foperator_ge::op2_range (frange &r, tree type,
// On the FALSE side of NAN >= x, we know nothing about x.
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_gt (r, type, op1);
break;
@@ -1592,6 +1618,8 @@ foperator_unordered_lt::op1_range (frange &r, tree type,
case BRS_TRUE:
if (op2.known_isnan ())
r.set_varying (type);
+ else if (op2.undefined_p ())
+ return false;
else
build_lt (r, type, op2);
break;
@@ -1601,6 +1629,8 @@ foperator_unordered_lt::op1_range (frange &r, tree type,
// impossible for op2 to be a NAN.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_ge (r, type, op2))
r.clear_nan ();
break;
@@ -1622,6 +1652,8 @@ foperator_unordered_lt::op2_range (frange &r, tree type,
case BRS_TRUE:
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_gt (r, type, op1);
break;
@@ -1631,6 +1663,8 @@ foperator_unordered_lt::op2_range (frange &r, tree type,
// impossible for op1 to be a NAN.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_le (r, type, op1))
r.clear_nan ();
break;
@@ -1686,6 +1720,8 @@ foperator_unordered_le::op1_range (frange &r, tree type,
case BRS_TRUE:
if (op2.known_isnan ())
r.set_varying (type);
+ else if (op2.undefined_p ())
+ return false;
else
build_le (r, type, op2);
break;
@@ -1717,6 +1753,8 @@ foperator_unordered_le::op2_range (frange &r,
case BRS_TRUE:
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_ge (r, type, op1);
break;
@@ -1726,6 +1764,8 @@ foperator_unordered_le::op2_range (frange &r,
// impossible for op1 to be a NAN.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_lt (r, type, op1))
r.clear_nan ();
break;
@@ -1783,6 +1823,8 @@ foperator_unordered_gt::op1_range (frange &r,
case BRS_TRUE:
if (op2.known_isnan ())
r.set_varying (type);
+ else if (op2.undefined_p ())
+ return false;
else
build_gt (r, type, op2);
break;
@@ -1792,6 +1834,8 @@ foperator_unordered_gt::op1_range (frange &r,
// impossible for op2 to be a NAN.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_le (r, type, op2))
r.clear_nan ();
break;
@@ -1814,6 +1858,8 @@ foperator_unordered_gt::op2_range (frange &r,
case BRS_TRUE:
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_lt (r, type, op1);
break;
@@ -1823,6 +1869,8 @@ foperator_unordered_gt::op2_range (frange &r,
// impossible for op1 to be a NAN.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_ge (r, type, op1))
r.clear_nan ();
break;
@@ -1880,6 +1928,8 @@ foperator_unordered_ge::op1_range (frange &r,
case BRS_TRUE:
if (op2.known_isnan ())
r.set_varying (type);
+ else if (op2.undefined_p ())
+ return false;
else
build_ge (r, type, op2);
break;
@@ -1889,6 +1939,8 @@ foperator_unordered_ge::op1_range (frange &r,
// impossible for op2 to be a NAN.
if (op2.known_isnan ())
r.set_undefined ();
+ else if (op2.undefined_p ())
+ return false;
else if (build_lt (r, type, op2))
r.clear_nan ();
break;
@@ -1910,6 +1962,8 @@ foperator_unordered_ge::op2_range (frange &r, tree type,
case BRS_TRUE:
if (op1.known_isnan ())
r.set_varying (type);
+ else if (op1.undefined_p ())
+ return false;
else
build_le (r, type, op1);
break;
@@ -1919,6 +1973,8 @@ foperator_unordered_ge::op2_range (frange &r, tree type,
// impossible for op1 to be a NAN.
if (op1.known_isnan ())
r.set_undefined ();
+ else if (op1.undefined_p ())
+ return false;
else if (build_gt (r, type, op1))
r.clear_nan ();
break;
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