libgcc/
PR target/50931
* config/avr/t-avr (LIB1ASMSRC): Add _mulpsi3, _mulsqipsi3.
* config/avr/lib1funcs.S (__mulpsi3, __mulsqipsi3): New functions.
gcc/
PR target/50931
* config/avr/avr.md (mulpsi3): New expander.
(*umulqihipsi3, *umulhiqipsi3): New insns.
(*mulsqipsi3.libgcc, *mulpsi3.libgcc): New insns.
(mulsqipsi3, *mulpsi3): New insn-and-splits.
(ashlpsi3): Turn to expander. Move insn code to...
(*ashlpsi3): ...this new insn.
testsuite/
PR target/50931
* gcc.target/avr/torture/int24-mul.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@182328 138bc75d-0d04-0410-961f-82ee72b054a4