Fix PR target/91769
This fixes the issue by checking that addr's base reg is not part of dest
multiword reg instead just checking the first reg of dest.
gcc/ChangeLog:
2019-10-03 Dragan Mladjenovic <dmladjenovic@wavecomp.com>
PR target/91769
* config/mips/mips.c (mips_split_move): Use reg_overlap_mentioned_p
instead of REGNO equality check on addr.reg.
gcc/testsuite/ChangeLog:
2019-10-03 Dragan Mladjenovic <dmladjenovic@wavecomp.com>
PR target/91769
* gcc.target/mips/pr91769.c: New test.
From-SVN: r276525
