Fixes removal of dead elements from PressureDiff (PR37252).

Reviewed By: MatzeB

Differential Revision: https://reviews.llvm.org/D51495


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342457 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed