[InstCombine] add tests for notnotsub; NFC
authorSanjay Patel <spatel@rotateright.com>
Sat, 3 Mar 2018 17:20:37 +0000 (17:20 +0000)
committerSanjay Patel <spatel@rotateright.com>
Sat, 3 Mar 2018 17:20:37 +0000 (17:20 +0000)
commit73eb2d255529c83e94b2e36d67060a14f60ce1a0
treecefb427e874f21cd94cfc8a2f2ad6095f22374b3
parentad403a483a3463efbbbf0cf0119b478a1c2190f5
[InstCombine] add tests for notnotsub; NFC

As shown in D44043, we may need this fold in the backend,
but it's also missing in the IR optimizer.

llvm-svn: 326659
llvm/test/Transforms/InstCombine/sub.ll