commit dafcef6848c5f4cd203f6a55b89d642bbdc60c89
author Florian Hahn <florian.hahn@arm.com> Mon Mar 05 17:33:50 2018 +0000
committer Florian Hahn <florian.hahn@arm.com> Mon Mar 05 17:33:50 2018 +0000
tree f404824a202c6ecfccbf3c51ca4360a40f33738e
parent da323855eb8345106dc8fdbf1c9de895976ec243

[IPSCCP] Add getCompare which returns either true, false, undef or null.

getCompare returns true, false or undef constants if the comparison can
be evaluated, or nullptr if it cannot. This is in line with what
ConstantExpr::getCompare returns. It also allows us to use
ConstantExpr::getCompare for comparing constants.

Reviewers: davide, mssimpso, dberlin, anna

Reviewed By: davide

Differential Revision: https://reviews.llvm.org/D43761


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326720 91177308-0d34-0410-b5e6-96231b3b80d8