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Hi Varun, Have you tried your experiment with icc by any chance? The MCJIT component does not assume that you will be executing the generated code on the host system because it can be used to generate code for external targets. However, you can specify the CPU by calling setCPU() on the EngineBuilder object before creating your execution engine. (You can use sys::getHostCPUName() to figure out

Hi, I am using the LLVM JIT infrastructure (MCJIT). I wanted to see if there are any performance gains as the compiler can detect the target CPU at runtime. But, I didn't see any improvement (I compile with -no-mmx and -no-sse). I then tried an experiment, where I compiled the program with clang-3.3, with and without specifying the target cpu as "corei7". I was shocked to see that

...suggestions, would be helpful. Thanks, -- Varun Agrawal PhD Student Computer Science, Stony Brook University http://compas.cs.stonybrook.edu/~vagrawal/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20131012/9aed7f2c/attachment.html>