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* [CodeGen] Move MacroFusion to the targetEvandro Menezes2017-02-011-0/+30
This patch moves the class for scheduling adjacent instructions, MacroFusion, to the target. In AArch64, it also expands the fusion to all instructions pairs in a scheduling block, beyond just among the predecessors of the branch at the end. Differential revision: https://reviews.llvm.org/D28489 llvm-svn: 293737
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