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Jakob Stoklund Olesen
4007529d4b
Admonish that MI is not IR and virtual registers have constraints.
In machine code, you can't just replaceRegWith() the same way you can replaceAllUsesWith() in IR. Virtual registers may have different register classes that need to be merged first. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142201 91177308-0d34-0410-b5e6-96231b3b80d8
…
Fix unused variable warning in the rare circumstance that we have no feature-dependent instructions.
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