[llvm-dev] Get basic-block cycle cost from LLVM
Rick Veens via llvm-dev
llvm-dev at lists.llvm.org
Thu Nov 9 04:41:39 PST 2017
I'm interested in obtaining the cycles spend by the CPU from LLVM and i was
wondering if this was possible to obtain this with the scheduling
information from LLVM. (For the cortex-m0 in particular).
I found the following function : getInstrLatency() in the TargetInstrInfo
If i sum the latencies of the instructions in a basic block i suppose i
will get the total cycle cost for the cortex-m0.
>From what i understand is that there are multiple ways of doing scheduling
I have read about one way which is using Itenaries and another which is
Will the above function always give me the latencies, independent on the
scheduling method used ?
Sorry if this is a stupid question, i'm a beginner to LLVM.
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