[lldb] [clang] [clang][DebugInfo] Emit global variable definitions for static data members with constant initializers (PR #70639)

[Michael Buch via cfe-commits]

Michael137 wrote:

> size report sounds generally OK - but there's a bunch of what look like unrelated or strange results in there, perhaps they weren't compared at exactly the same version? (like why did the apple_names size go down? How did the .text and .debuG_line size change at all? )

Yea I was confused about that too. Might've mixed up commits of the control build. Did measurements again and here's what I got:
```
$ bloaty `find ./patched-build/lib -name *.o `      │ $ bloaty `find ./no-patch-build/lib -name *.o `
    FILE SIZE        VM SIZE                        │    FILE SIZE        VM SIZE    
 --------------  --------------                     │ --------------  -------------- 
  54.6%  2.02Gi  60.3%  2.02Gi    ,__debug_str      │  54.5%  2.01Gi  60.3%  2.01Gi    ,__debug_str
  22.0%   834Mi  24.3%   834Mi    ,__debug_info     │  22.1%   833Mi  24.4%   833Mi    ,__debug_info
   6.2%   236Mi   0.0%       0    String Table      │   6.2%   236Mi   0.0%       0    String Table
   4.5%   170Mi   5.0%   170Mi    ,__text           │   4.5%   170Mi   5.0%   170Mi    ,__text
   2.6%  97.6Mi   2.8%  97.6Mi    ,__debug_line     │   2.6%  98.6Mi   2.9%  98.6Mi    ,__debug_line
   2.3%  88.0Mi   2.6%  88.0Mi    ,__apple_types    │   2.3%  88.0Mi   2.6%  88.0Mi    ,__apple_types
   2.2%  83.1Mi   2.4%  83.1Mi    ,__apple_names    │   2.2%  81.8Mi   0.0%       0    [Unmapped]
   2.2%  81.8Mi   0.0%       0    [Unmapped]        │   2.1%  77.8Mi   2.3%  77.8Mi    ,__apple_names
   1.7%  65.6Mi   1.9%  65.6Mi    ,__compact_unwind │   1.7%  65.6Mi   1.9%  65.6Mi    ,__compact_unwind
   1.0%  39.2Mi   0.0%       0    Symbol Table      │   1.0%  39.2Mi   0.0%       0    Symbol Table
   0.2%  8.05Mi   0.2%  8.05Mi    ,__const          │   0.2%  8.05Mi   0.2%  8.05Mi    ,__const
   0.2%  7.91Mi   0.2%  7.91Mi    ,__cstring        │   0.2%  7.92Mi   0.2%  7.92Mi    ,__cstring
   0.1%  5.05Mi   0.1%  5.05Mi    ,__debug_abbrev   │   0.1%  5.22Mi   0.2%  5.22Mi    ,__debug_abbrev
   0.1%  2.31Mi   0.0%       0    [Mach-O Headers]  │   0.1%  2.31Mi   0.0%       0    [Mach-O Headers]
   0.0%  1.38Mi   0.0%  1.38Mi    ,__debug_ranges   │   0.0%  1.38Mi   0.0%  1.38Mi    ,__debug_ranges
   0.0%   994Ki   0.0%   994Ki    ,__apple_namespac │   0.0%   994Ki   0.0%   994Ki    ,__apple_namespac
   0.0%       0   0.0%   354Ki    ,__bss            │   0.0%       0   0.0%   354Ki    ,__bss
   0.0%   324Ki   0.0%   324Ki    ,__data           │   0.0%   324Ki   0.0%   324Ki    ,__data
   0.0%   283Ki   0.0%   283Ki    ,__StaticInit     │   0.0%   283Ki   0.0%   283Ki    ,__StaticInit
   0.0%  31.3Ki   0.0%  61.4Ki    [10 Others]       │   0.0%  31.3Ki   0.0%  61.4Ki    [10 Others]
   0.0%  58.6Ki   0.0%  58.6Ki    ,__apple_objc     │   0.0%  58.6Ki   0.0%  58.6Ki    ,__apple_objc
 100.0%  3.70Gi 100.0%  3.35Gi    TOTAL             │ 100.0%  3.69Gi 100.0%  3.34Gi    TOTAL
```

Section breakdown is still similar

https://github.com/llvm/llvm-project/pull/70639