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CodeGen: Replace ThinLTO backend implementation with a client of LTO/Resolution.

Description

CodeGen: Replace ThinLTO backend implementation with a client of LTO/Resolution.

Summary:
This changes clang to use the llvm::lto::thinBackend function instead of
its own less comprehensive ThinLTO backend implementation.

Patch by Peter Collingbourne

Reviewers: tejohnson, mehdi_amini

Subscribers: cfe-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D21545

Details

Committed
tejohnsonAug 12 2016, 11:12 AM
Differential Revision
D21545: CodeGen: Replace ThinLTO backend implementation with a client of LTO/Resolution.
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