This series of patches are for fixing PR61441. This patch modifies code to use

This series of patches are for fixing PR61441. This patch modifies code to use
REAL_VALUE_ISSIGNALING_NAN instead of REAL_VALUE_ISNAN to avoid the operatins
only for sNaN operands.

Bootstrapped & regression-tested on x86_64-linux-gnu.

gcc/
	* fold-const.c (const_binop): Use REAL_VALUE_ISSIGNALING_NAN instead
	of REAL_VALUE_ISNAN to avoid the operation for sNaN operands.
	* simplify-rtx.c (simplify_const_binary_operation): Same.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231857 138bc75d-0d04-0410-961f-82ee72b054a4