I am running the command line
opt test.bc -loop-vectorize -o test2.bc -stats
to check the statistics collected by the LLVM
loop vectorize pass. However, after running the command, I only get the test2.bc without getting any stats printed. May I know where should I look for these stats?
Thanks in advance, T
They should be printed on your terminal after the command has finished executing. However, your LLVM
needs to be built with assertions enabled, documented here:
Note that in order to use the ‘-stats‘ option, LLVM must be compiled with assertions enabled.
This corresponds to this cmake
flag, if you are building LLVM
from source:
-DLLVM_ENABLE_ASSERTIONS=On
Moreover, you can query a specific LLVM
installation for its assertion mode using:
llvm-config --assertion-mode
If assertions are enabled, then it should return ON
.
For code introspection of this feature, the corresponding preprocessor definition is
LLVM_ENABLE_STATS
or when NDEBUG
is not defined, as seen in the include/llvm/Support/Statistic.h
header file.