[AArch64] Replace insn to zero up SIMD registers
gcc/
* config/aarch64/aarch64.md
(*movhf_aarch64): Add "movi %0, #0" to zero up register and
remove the "fp" attributes.
(*movsf_aarch64): Add "movi %0, #0" to zero up register and
add the "simd" attributes.
(*movdf_aarch64): Likewise.
(*movtf_aarch64): Remove the "fp" attributes.
* testsuite/gcc.target/aarch64/fmovf-zero-reg.c: Update accordingly.
* testsuite/gcc.target/aarch64/fmovd-zero-reg.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@235532 138bc75d-0d04-0410-961f-82ee72b054a4