[PATCH] D58875: [X86] Merge negated ISD::SUB nodes into X86ISD::SUB equivalent (PR40483) (WIP)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/test/CodeGen/X86/jump_sign.ll:307
 ; If we have sub a, b and cmp b, a and the result of cmp is used
 ; by sbb, we should not optimize cmp away.
 define i32 @func_q(i32 %a0, i32 %a1, i32 %a2) {
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https://reviews.llvm.org/D58875