https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66462
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I currently have
===
diff --git a/gcc/builtins.c b/gcc/builtins.c
index ad5135c..bc3d318 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -9050,6 +9050,12 @@ fold_builtin_interclass_mathfn (location_t loc, tree
fnde
if (interclass_mathfn_icode (arg, fndecl) != CODE_FOR_nothing)
return NULL_TREE;
+ /* None of these builtins are ever exceptional, not even for signaling NaNs,
+ so we cannot do any of these optimizations that involve a floating point
+ comparison. */
+ if (flag_signaling_nans)
+ return NULL_TREE;
+
mode = TYPE_MODE (TREE_TYPE (arg));
bool is_ibm_extended = MODE_COMPOSITE_P (mode);
===
but we should really handle this with some non-signaling insns, not punt
it to libm to do.
