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When address ranges for compile unit are specified in compile unit DIE itself, there is no need to collect ranges from children subprogram DIEs. This change speeds up llvm-symbolizer on Clang-produced binaries with full debug info. For instance, symbolizing a first address in a 1Gb binary is now 2x faster (1s vs. 2s). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206641 91177308-0d34-0410-b5e6-96231b3b80d8
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