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[MachineCopyPropagation] Refactor copy tracking into a class. NFC

Authored by bogner on Sep 20 2018, 5:51 PM.

Description

[MachineCopyPropagation] Refactor copy tracking into a class. NFC

This is a bit easier to follow than handling the copy and src maps
directly in the pass, and will make upcoming changes to how this is
done easier to follow.

llvm-svn: 342703

Details

Committed
bognerSep 20 2018, 5:51 PM
Parents
rG7b1c8168c791: [llvm-objcopy/llvm-strip]: handle --version
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