PR 68393: Handle SUBREG_PROMOTED_VAR_P in expand_direct_optab_fn
Do the usual dance when assigning to SUBREG_PROMOTED_VAR_P destinations:
first convert to the outer mode, then extend to the inner mode.
Tested that it fixes the powerpc64le-linux-gnu breakage. Also tested
on x86_64-linux-gnu and powerpc64-linux-gnu.
gcc/
PR bootstrap/68393
* internal-fn.c (expand_direct_optab_fn): Handle SUBREG_PROMOTED_VAR_P
destinations.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230590 138bc75d-0d04-0410-961f-82ee72b054a4