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[LSR] Generate and use zero extends
author
Sanjoy Das
<sanjoy@playingwithpointers.com>
Mon, 27 Jul 2015 23:27:51 +0000
(23:27 +0000)
committer
Sanjoy Das
<sanjoy@playingwithpointers.com>
Mon, 27 Jul 2015 23:27:51 +0000
(23:27 +0000)
Summary:
If a scale or a base register can be rewritten as "Zext({A,+,1})" then
LSR will now consider a formula of that form in its normal cost
computation.
Depends on D9180
Reviewers: qcolombet, atrick
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D9181
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243348
91177308
-0d34-0410-b5e6-
96231b3b80d8
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