LLVM 6.0 Release
Location Coverage Graphs
$ llvm-locstats --draw-plot gdb-build-with-llvm6.0

This page contains the statistics about Debug Location in optimized code generated by various versions of LLVM. We use llvm-locstats tool for that purpose (please see llvm-locstats tool).
Test bed: binutils-gdb (HEAD at 832a580781; compiled with -g -O2)
NOTE: The interactive graph was generated using the amcharts tool with the data produced by llvm-locstats.