[PATCH] D35182: [InstCombine] remove one-use restriction for not (cmp P, A, B) --> cmp P', A, B

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

The C code with the global variables never creates a 'not' operation and never combines the 4 compares with 0. For your modified version, it looks like something combined the two compares with A into a single compare and the xor and with this patch instcombine undoes that. Isn't that moving in the opposite direction of PR27431?


https://reviews.llvm.org/D35182