[PATCH] D82730: [SimplifyCFG] Merge identical basic blocks (WIP)

[Nikita Popov via Phabricator via llvm-commits]

nikic created this revision.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

Merge basic blocks that are exactly the same, inspired by https://bugs.llvm.org/show_bug.cgi?id=46402.

There's stuff to figure out here first, such as a 350% compile-time regression on CMakeFiles/clamscan.dir/libclamav_nsis_LZMADecode.c.o.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D82730

Files:
  llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp
  llvm/lib/Transforms/Utils/SimplifyCFG.cpp
  llvm/test/Transforms/LoopDeletion/simplify-then-delete.ll
  llvm/test/Transforms/LoopUnswitch/infinite-loop.ll
  llvm/test/Transforms/PGOProfile/chr.ll
  llvm/test/Transforms/SimplifyCFG/ForwardSwitchConditionToPHI.ll
  llvm/test/Transforms/SimplifyCFG/HoistCode.ll
  llvm/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
  llvm/test/Transforms/SimplifyCFG/duplicate-landingpad.ll
  llvm/test/Transforms/SimplifyCFG/merge-blocks.ll
  llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D82730.273972.patch
Type: text/x-patch
Size: 37867 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20200628/12d8fd4c/attachment-0001.bin>