[LLVMdev] profile guided optimizations

[Xin Tong]

Hi

I have one question on LLVM 3.3 profile guided optimizations.

I see in the utils/profile.pl there are supports
for "-insert-block-profiling", "-insert-edge-profiling"
and "-insert-function-profiling", but it seems only -insert-edge-profiling
is working and the other 2 gets suggested to "-insert-gcov-profiling".
 and llvm_start_basic_block_tracing does not seem to be called anywhere in
the LLVM src code.

Thank you,
Trent
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