[InstCombine] When folding casts through a phi node merge the debug locations
If all the operands to a phi node are a cast, instcombine will try to pull
them through the phi node, combining them into a single cast. When it does
this, the debug location of the new cast should be the merged debug locations
of the phi node arguments.
Patch 6 of 8 for D26256. Folding of a cast operation.
Differential Revision: https://reviews.llvm.org/D26256
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289693 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed