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68cbe780e4
In rare cases we can receive request to inject into completelly empty basic block. In the normal case all basic blocks contain at least terminator instruction, but it is possible that the only instruction is catchpad instruction which is not part of the instruction iterator. This case seems rare enough to not care about it. Submiting without review, since it seems almost NFC. I couldn't come up with any reasonable way to test this. llvm-svn: 319444
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