3 Commits

Author	SHA1	Message	Date
Xin Tong	a4b9b9f42a	Take indirect branch into account as well when folding. ... We may not be able to rewrite indirect branch target, but we also want to take it into account when folding, i.e. if it and all its successor's predecessors go to the same destination, we can fold, i.e. no need to thread. llvm-svn: 301816	2017-05-01 17:15:37 +00:00
Xin Tong	21f8ac235e	[JumpThread] Do RAUW in case Cond folds to a constant in the CFG ... Summary: [JumpThread] Do RAUW in case Cond folds to a constant in the CFG Reviewers: sanjoy Reviewed By: sanjoy Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D32407 llvm-svn: 301804	2017-05-01 15:34:17 +00:00
Xin Tong	f98602a1ab	[JumpThread] We want to fold (not thread) when all predecessor go to single BB's successor. ... Summary: In case all predecessor go to a single successor of current BB. We want to fold (not thread). I failed to update the phi nodes properly in the last patch https://reviews.llvm.org/rL300657. Phi nodes values are per predecessor in LLVM. Reviewers: sanjoy Reviewed By: sanjoy Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D32400 llvm-svn: 301139	2017-04-23 20:56:29 +00:00