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7acc7fbaea
The most common case for a branch condition is a single use compare. Directly invert the branch predicate rather than adding a lot of xor i1 true which the DAG will have to fold later. This produces nicer to read structurizer output. This produces some random changes in codegen due to the DAG swapping branch conditions itself, and then does a poor job of dealing with those inverts. llvm-svn: 300732
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