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Reapply fix PR23384 (part 3 of 3) r304824 (was reverted in r305720).

Description

Reapply fix PR23384 (part 3 of 3) r304824 (was reverted in r305720).
The root cause of reverting was fixed - PR33514.

Summary:
The patch makes instruction count the highest priority for
LSR solution for X86 (previously registers had highest priority).

Reviewers: qcolombet

Differential Revision: http://reviews.llvm.org/D30562

From: Evgeny Stupachenko <evstupac@gmail.com>

<evgeny.v.stupachenko@intel.com>

Details

Committed
evstupacAug 7 2017, 12:56 PM
Differential Revision
D30562: Add Instruction number to LSR cost model (PR23384) part 3 of 3
Parents
rL310288: Merging r309851:
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