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* [gcc r13-3194] x UNORD x should set NAN on the TRUE side (and !NAN on the FALSE side).
@ 2022-10-10 12:50 Aldy Hernandez
0 siblings, 0 replies; only message in thread
From: Aldy Hernandez @ 2022-10-10 12:50 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:58fa21622b01d6064024c92bb09fb60fa5b75977
commit r13-3194-g58fa21622b01d6064024c92bb09fb60fa5b75977
Author: Aldy Hernandez <aldyh@redhat.com>
Date: Mon Oct 10 11:01:48 2022 +0200
x UNORD x should set NAN on the TRUE side (and !NAN on the FALSE side).
gcc/ChangeLog:
* range-op-float.cc (foperator_unordered::op1_range): Set NAN when
operands are equal and result is TRUE.
Diff:
---
gcc/range-op-float.cc | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc
index 68578aa6fe7..91833d3f855 100644
--- a/gcc/range-op-float.cc
+++ b/gcc/range-op-float.cc
@@ -1026,23 +1026,27 @@ bool
foperator_unordered::op1_range (frange &r, tree type,
const irange &lhs,
const frange &op2,
- relation_kind) const
+ relation_kind rel) const
{
switch (get_bool_state (r, lhs, type))
{
case BRS_TRUE:
+ if (rel == VREL_EQ)
+ r.set_nan (type);
// Since at least one operand must be NAN, if one of them is
// not, the other must be.
- if (!op2.maybe_isnan ())
+ else if (!op2.maybe_isnan ())
r.set_nan (type);
else
r.set_varying (type);
break;
case BRS_FALSE:
+ if (rel == VREL_EQ)
+ r.clear_nan ();
// A false UNORDERED means both operands are !NAN, so it's
// impossible for op2 to be a NAN.
- if (op2.known_isnan ())
+ else if (op2.known_isnan ())
r.set_undefined ();
else
{
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