Do not optimize flags-setting add
authorBruce Forstall <brucefo@microsoft.com>
Sat, 9 Dec 2017 02:07:05 +0000 (18:07 -0800)
committerBruce Forstall <brucefo@microsoft.com>
Tue, 12 Dec 2017 00:21:45 +0000 (16:21 -0800)
commitc73a95cb7ab29228ebb2099ed30067d2bba8294f
treec7b34c5358e5a671f16c49b64fbfaac69ea7d449
parent5497ed00472edb2d947853c95243671554746fd1
Do not optimize flags-setting add

In minopts, we were attempting to generate "add r0,r0,0" and
optimizing it away completely. But it if needs to generate
the flags, for a subsequent overflow (flags) check, we can't do that.

Fixes #14860
src/jit/emitarm.cpp