Don't look for empty live ranges in the unions.
authorJakob Stoklund Olesen <stoklund@2pi.dk>
Sat, 12 May 2012 00:33:28 +0000 (00:33 +0000)
committerJakob Stoklund Olesen <stoklund@2pi.dk>
Sat, 12 May 2012 00:33:28 +0000 (00:33 +0000)
commit2b3fa322b8788e62e28bc6989a53737bf9483437
treea5d04628d96861552ac46b5a8ac7b4fdd3e37a7d
parent27ba61df9f9decc70124b7559f777ad596dfda29
Don't look for empty live ranges in the unions.

Empty live ranges represent undef and still get allocated, but they
won't appear in LiveIntervalUnions.

Patch by Patrik Hägglund!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156685 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/RegAllocBase.cpp