Rahul Joshi 251923169d [NFC] Eliminate use of .getBlocks() when not needed
Also use llvm::hasSingleElement() instead of .size() == 1

PiperOrigin-RevId: 317675565
Change-Id: I4f0e8892957c2b20e115584fe7424da68d53b67a
2020-06-22 10:34:01 -07:00
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