Edge Profiling

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1

Hello.

I'm using these commands to compile the code below in order to collect
edge/blocks profiling:

clang -emit-llvm -c sort.c -o sort.bc
opt -insert-edge-profiling sort.bc -o sort_prof.bc
clang sort_prof.bc -lprofile_rt -L/llvms/lib -o sort_prof

then I run the program and display the profiling information using
llvm-prof sort_prof.bc, and the result is:

2

Hello,

See answers below

Hello.

I'm using these commands to compile the code below in order to collect
edge/blocks profiling:

clang -emit-llvm -c sort.c -o sort.bc
opt -insert-edge-profiling sort.bc -o sort_prof.bc
clang sort_prof.bc -lprofile_rt -L/llvms/lib -o sort_prof

then I run the program and display the profiling information using

You can also skip the compilation step and run directly through the interpreter

lli -load /llvms/lib/libprofile_rt.so sort_prof.bc

llvm-prof sort_prof.bc, and the result is:

try running llvm-prof on the original (non instrumented) code, that should give you the correct results

llvm-prof sort.bc

Cheers,
  Roel

3

Hi Roel, many thanks, it worked perfectly now!

César.