[PATCH] D73534: [WIP][DebugInfo] Enable the debug entry values feature by default

[Vedant Kumar via Phabricator via llvm-commits]

vsk added a comment.

I ran CTMark using a stage1 Release clang as my compiler, with and without `-Xclang -femit-debug-entry-values` set using the 'Os-g.cmake' cache file. The compile time difference on my Mac was in the noise (however the machine was not stabilized for perf measurements):

| Config                                       | CTMark Geomean (seconds) | Mean    | Stddev  | Range             | # Projects |
| -Os -g -j1                                   | 14.0828                  | 16.0467 | 8.63911 | [6.8003, 35.4556] | 10         |
| -Os -g -Xclang -femit-debug-entry-values -j1 | 14.0741                  | 15.9379 | 8.3288  | [6.8240, 34.5410] | 10         |
|

In the entryvals CTMark run, the total size of DWARF sections in the .o's grew from 52166507 bytes (baseline) to 53249808 bytes [1], a 2% size increase. I'll try to grab numbers for a stage2 build tomorrow.

F11260824: ctmark-Os-g-j1.json <https://reviews.llvm.org/F11260824>
F11260826: ctmark-Os-g-entryvals-j1.json <https://reviews.llvm.org/F11260826>
[1] `find . -name \*.o -exec size -m {} \; | grep "Section (__DWARF" | sumcol 4`


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https://reviews.llvm.org/D73534