Sanjoy Das 93b3504aa8 [LSR] Generate and use zero extends ...

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

llvm-svn: 243348

2015-07-27 23:27:51 +00:00

188 KiB

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