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a807d6783a
Use more straightforward way to represent the set of instruction ranges where the location of a user variable is defined - vector of pairs of instructions (defining start/end of each range), instead of a flattened vector of instructions where some instructions are supposed to start the range, and the rest are supposed to "clobber" it. Simplify the code which generates actual .debug_loc entries. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209698 91177308-0d34-0410-b5e6-96231b3b80d8