[LLVMdev] Basic Block Frequency counting in LLVM 2.9

Chandler Carruth chandlerc at google.com
Mon Nov 19 02:34:23 PST 2012

Both llvm-gcc and llvm 2.9 are ancient and dead. None are terribly
likely to be able to help you with debugging them. Sorry. =/

On Sun, Nov 18, 2012 at 4:14 AM, Rajendra Patel <rdpatel55 at yahoo.co.in> wrote:
> Dear All,
> I'm using LLVM2.9 for profiling basic block frequency.
> I'm using following commands.
> rdpatel55 at ubuntu:~$ llvm-gcc -emit-llvm -O0 -c -o adpcm.bc adpcm.c
> rdpatel55 at ubuntu:~$ llvm-gcc -emit-llvm -O0 -c -o rawcaudio.bc rawcaudio.c
> rdpatel55 at ubuntu:~$ llvm-link -o main.bc rawcaudio.bc adpcm.bc
> rdpatel55 at ubuntu:~$ opt -q -f -insert-edge-profiling -o main.inst main.bc
> rdpatel55 at ubuntu:~$ lli -fake-argv0 'main.bc' -load
> /home/rdpatel55/RDPATEL/LLVM2.9/OBJ_ROOT/Debug+Profile/lib/profile_rt.so
> main.inst < ./small.pcm > op_small.adpcm
> rdpatel55 at ubuntu:~$ llvm-prof main.inst > profile.txt
> rdpatel55 at ubuntu:~$ llvm-prof -annotated-llvm main.inst > bb.txt (This gives BB
> frequency for all Blocks)
> It works fine. But I found that for certain blocks the execution frequency
> calculated is wrong.
> Is there someone to help me to figure out, where something is wrong?
> Thank you,
> Rajendra Patel
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