Chris Lattner 0de632bfae Assert that input blocks meet the invariants we expect
Simplify the input/output finder.  All elements of a basic block are
instructions.  Any used arguments are also inputs.  An instruction can only
be used by another instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12405 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-15 01:18:23 +00:00
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