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1. Model dual issues as two FUs. 2. Model the pipelines correctly: two symmetric ALUs, the multiplier is a dependent pipeline on ALU0. The changes do not have much impact on codegen right now. But I plan to make pre-RA scheduler multi-issue aware which should take good advantage of the changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115457 91177308-0d34-0410-b5e6-96231b3b80d8
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