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Florian Hahn bd3f6055e7 [PatternMatch] Make m_Br more flexible, add matchers for BB values.
Currently m_Br only takes references to BasicBlock*, which limits its
flexibility. For example, you have to declare a variable, even if you
ignore the result or you have to have additional checks to make sure the
matched BB matches an expected one.

This patch adds m_BasicBlock and m_SpecificBB matchers, which can be
used like the existing matchers for constants or values.

I also had a look at the existing uses and updated a few. IMO it makes
the code a bit more explicit.

Reviewers: spatel, craig.topper, RKSimon, majnemer, lebedev.ri

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D68013

llvm-svn: 372885
2019-09-25 15:05:08 +00:00
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