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Commit 4ba7c88c authored by Sebastian Pop's avatar Sebastian Pop
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GVN-hoist: compute DFS numbers once 

With this patch we compute the DFS numbers of instructions only once and update
them during the code generation when an instruction gets hoisted.

Differential Revision: https://reviews.llvm.org/D23021

llvm-svn: 277650
parent 5d3822fc
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