commit 628018073d775a1309c50c5ce9bd7bc7b490a50b
author Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> Mon Feb 18 14:15:25 2019 +0000
committer Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> Mon Feb 18 14:15:25 2019 +0000
tree 05e7ed4782d114464131b85f541ea930054a001b
parent 3d4666cd74d3aaab54ce4076ae92b119cfe101ba

[MCA] Correctly update register definitions in the PRF after move elimination.

This patch fixes a bug where register writes performed by optimizable register
moves were sometimes wrongly treated like partial register updates.  Before this
patch, llvm-mca wrongly predicted a 1.50 IPC for test reg-move-elimination-6.s
(added by this patch).  With this patch, llvm-mca correctly updates the register
defintions in the PRF, and the IPC for that test is now correctly reported as 2.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354271 91177308-0d34-0410-b5e6-96231b3b80d8