CodeGen/LiveVariables: use vector::assign()

Address review comments.
ExecutionEngine: address review comments
Revert "Support/Path: remove raw delete"

This reverts commit r216360.
Revert "Support/APFloat: unique_ptr-ify temp arrays"

This reverts commit rr216359.
Revert "NVPTX: remove another raw delete call"

This reverts commit r216364.
Revert "Analysis: unique_ptr-ify DependenceAnalysis::collectCoeffInfo"

This reverts commit r216358.
Analysis: cleanup

Address review comments.
Revert "AArch64: use std::vector for temp array"

This reverts commit r216365.