Duncan P. N. Exon Smith 362d120488 Scalar: Avoid dereferencing end() in IndVarSimplify ...

IndVarSimplify::sinkUnusedInvariants calls
BasicBlock::getFirstInsertionPt on the ExitBlock and moves instructions
before it.  This can return end(), so it's not safe to dereference.  Add
an iterator-based overload to Instruction::moveBefore to avoid the UB.

llvm-svn: 278886

2016-08-17 01:54:41 +00:00

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