Max Kazantsev 508052c1d6 [LoopSimplifyCFG] Teach LoopSimplifyCFG to constant-fold branches and switches ...

This patch introduces infrastructure and the simplest case for constant-folding
of branch and switch instructions within loop into unconditional branches.
It is useful as a cleanup for such passes as loop unswitching that sometimes
produce such branches.

Only the simplest case supported in this patch: after the folding, no block
should become dead or stop being part of the loop. Support for more
sophisticated cases will go separately in follow-up patches.

Differential Revision: https://reviews.llvm.org/D54021
Reviewed By: anna


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@347183 91177308-0d34-0410-b5e6-96231b3b80d8

2018-11-19 05:54:38 +00:00

..

constant-fold-branch.ll

[LoopSimplifyCFG] Teach LoopSimplifyCFG to constant-fold branches and switches

2018-11-19 05:54:38 +00:00

merge-header.ll

Update MemorySSA in LoopSimplifyCFG.

2018-08-22 20:10:21 +00:00

scev.ll

Update MemorySSA in LoopSimplifyCFG.

2018-08-22 20:10:21 +00:00