tree 77a3bc43031bc5659f6678d07412db65d59acdb4
parent 50b5493cd61b1badae8a0c0afc9370a051d271e0
author Alexey Bataev <a.bataev@hotmail.com> 1513019476 +0000
committer Alexey Bataev <a.bataev@hotmail.com> 1513019476 +0000

[InstCombine] Fix PR35618: Instcombine hangs on single minmax load bitcast.

Summary:
If we have pattern `store (load(bitcast(select (cmp(V1, V2), &V1,
&V2)))), bitcast)`, but the load is used in other instructions, it leads
to looping in InstCombiner. Patch adds additional check that all users
of the load instructions are stores and then replaces all uses of load
instruction by the new one with new type.

Reviewers: RKSimon, spatel, majnemer

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D41072

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320407 91177308-0d34-0410-b5e6-96231b3b80d8