[LLVMdev] Executable size comparison for different targets.

[Richard Pennington]

Here is a size comparison of compiling bzip2 for different targets using the
ELLCC clang/LLVM based cross development tool chain (http://ellcc.org):

     -target              Endian        Float
armeb-linux-engeabi       Big           Soft
armeb-linux-engeabihf     Big           Hard
arm-linux-engeabi         Little        Soft
arm-linux-engeabihf       Little        Hard
i386-linux-eng            Little        Hard
mipsel-linux-eng          Little        Hard
mipsel-linux-engsf        Little        Soft
mips-linux-eng            Big           Hard
mips-linux-engsf          Big           Soft
ppc-linux-eng             Big           Hard
x86_64-linux-eng          Little        Hard

/ellcc/test/src/bzip2-1.0.6] dev% size bzip2*-linux-*
    text    data     bss     dec     hex filename
  177316    3632    7828  188776   2e168 bzip2.armeb-linux-engeabi
  170356    3632    7828  181816   2c638 bzip2.armeb-linux-engeabihf
  177332    3632    7828  188792   2e178 bzip2.arm-linux-engeabi
  170364    3632    7828  181824   2c640 bzip2.arm-linux-engeabihf
  156750    3620    7812  168182   290f6 bzip2.i386-linux-eng
  314676    3632    7820  326128   4f9f0 bzip2.microblaze-linux-eng
  205476    3656    7900  217032   34fc8 bzip2.mipsel-linux-eng
  213608    3656    7900  225164   36f8c bzip2.mipsel-linux-engsf
  205492    3656    7900  217048   34fd8 bzip2.mips-linux-eng
  213632    3656    7900  225188   36fa4 bzip2.mips-linux-engsf
  180680    3632    7828  192140   2ee8c bzip2.ppc-linux-eng
  164482    3992    8640  177114   2b3da bzip2.x86_64-linux-eng

Soft float adds about 7K to the size of the executable compared to its
hard float counterpart, which sounds about right. These executables are
all statically linked with musl and compiler-rt. A dynamically linked 
executable
for x86_64 looks like this:

[~/ellcc/test/src/bzip2-1.0.6] dev% size bzip2
    text    data     bss     dec     hex filename
  120131    4176    4400  128707   1f6c3 bzip2

-Rich