[PATCH] D105280: [2/2][RemoveRedundantDebugValues] Introduce a MIR pass that removes redundant DBG_VALUEs

[Djordje Todorovic via Phabricator via llvm-commits]

djtodoro added a comment.

llvm-locstats numbers (on the gdb-7.11 binary compiled with -g -O2)

  $ llvm-locstats ./gdb-before-the-patch
   =================================================
              Debug Location Statistics
   =================================================
       cov%           samples         percentage(~)
   -------------------------------------------------
      0%                 2517                2%
     (0%,10%)           5849                5%
     [10%,20%)          4992                4%
     [20%,30%)          4886                4%
     [30%,40%)          4468                4%
     [40%,50%)          4127                4%
     [50%,60%)          4535                4%
     [60%,70%)          4670                4%
     [70%,80%)          5529                5%
     [80%,90%)          6257                6%
     [90%,100%)        10197                9%
     100%              44979               43%
   =================================================
   -the number of debug variables processed: 103006
   -PC ranges covered: 57%
   -------------------------------------------------
   -total availability: 86%
   =================================================
  
  
  bash-4.2$ ../../build/bin/llvm-locstats --ignore-debug-entry-values ./gdb-before-the-patch
   =================================================
              Debug Location Statistics
   =================================================
       cov%           samples         percentage(~)
   -------------------------------------------------
     0%                 2517                2%
     (0%,10%)           6898                6%
     [10%,20%)          6008                5%
     [20%,30%)          5870                5%
     [30%,40%)          5347                5%
     [40%,50%)          4971                4%
     [50%,60%)          5316                5%
     [60%,70%)          5241                5%
     [70%,80%)          6147                5%
     [80%,90%)          6826                6%
     [90%,100%)        12995               12%
     100%              34870               33%
   =================================================
   -the number of debug variables processed: 103006
   -PC ranges covered: 54%
   -------------------------------------------------
   -total availability: 86%
   =================================================
  
  $ llvm-locstats ./gdb-after-the-patch
   =================================================
              Debug Location Statistics
   =================================================
       cov%           samples         percentage(~)
   -------------------------------------------------
     0%                 2517                2%
     (0%,10%)           5847                5%
     [10%,20%)          4991                4%
     [20%,30%)          4887                4%
     [30%,40%)          4470                4%
     [40%,50%)          4126                4%
     [50%,60%)          4535                4%
     [60%,70%)          4667                4%
     [70%,80%)          5528                5%
     [80%,90%)          6258                6%
     [90%,100%)        10176                9%
     100%              45004               43%
   =================================================
   -the number of debug variables processed: 103006
   -PC ranges covered: 57%
   -------------------------------------------------
   -total availability: 86%
   =================================================
  
  $ llvm-locstats --ignore-debug-entry-values ./gdb-after-the-patch
   =================================================
              Debug Location Statistics
   =================================================
       cov%           samples         percentage(~)
   -------------------------------------------------
     0%                 2517                2%
     (0%,10%)           6897                6%
     [10%,20%)          6009                5%
     [20%,30%)          5869                5%
     [30%,40%)          5350                5%
     [40%,50%)          4969                4%
     [50%,60%)          5317                5%
     [60%,70%)          5239                5%
     [70%,80%)          6147                5%
     [80%,90%)          6827                6%
     [90%,100%)        12995               12%
     100%              34870               33%
   =================================================
   -the number of debug variables processed: 103006
   -PC ranges covered: 54%
   -------------------------------------------------
   -total availability: 86%
   =================================================


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  https://reviews.llvm.org/D105280/new/

https://reviews.llvm.org/D105280