commit b7a48d833a3fbd3b881ff16807734046b0d01ce8
author Davide Italiano <davide@freebsd.org> Wed Aug 23 09:14:37 2017 +0000
committer Davide Italiano <davide@freebsd.org> Wed Aug 23 09:14:37 2017 +0000
tree 4b2257fbd47c0cb56e67e8b6c9311793db8e6906
parent ea638e645f3e3e9f8c72553391d3867d8645b771

[InstCombine] Fold branches with irrelevant conditions to a constant.

InstCombine folds instructions with irrelevant conditions to undef.
This, as Nuno confirmed is a bug.
(see https://bugs.llvm.org/show_bug.cgi?id=33409#c1 )

Given the original motivation for the change is that of removing an
USE, we now fold to false instead (which reaches the same goal
without undesired side effects).

Fixes PR33409.

Differential Revision:  https://reviews.llvm.org/D36975

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311540 91177308-0d34-0410-b5e6-96231b3b80d8