[PATCH] D67234: [MergedLoadStoreMotion] Sink stores if they have common GEP

[Denis Bakhvalov via Phabricator via llvm-commits]

dendibakh created this revision.
dendibakh added reviewers: bjope, lebedev.ri, davide.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
dendibakh edited the summary of this revision.

If 2 stores in the diamond have common GEP:

  bb1:
    %tmp = getelementptr inbounds i32, i32* %arg1, i64 1
    br i1 %arg2, label %bb2, label %bb3
  bb2:                                              ; preds = %bb1
    store i32 42, i32* %tmp, align 4
    br label %bb4
  bb3:                                              ; preds = %bb1
    store i32 42, i32* %tmp, align 4
    br label %bb4
  bb4:                                              ; preds = %bb2, %bb3
    ret void

Stores will be sunk into %bb4.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D67234

Files:
  llvm/lib/Transforms/Scalar/MergedLoadStoreMotion.cpp
  llvm/test/Transforms/InstMerge/st_sink_no_geps.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D67234.218955.patch
Type: text/x-patch
Size: 5752 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20190905/b86b15f3/attachment.bin>