On Thu, Feb 9, 2017 at 8:43 AM, William Tu via iovisor-dev
<[email protected]> wrote:
>
>     $(CLANG) \
>         -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
>         -Wno-compare-distinct-pointer-types \
>         -Wno-gnu-variable-sized-type-not-at-end \
>         -Wno-tautological-compare \
>         -O2 -emit-llvm -g -c $< -o -| $(LLC) -O0 -march=bpf -filetype=obj -o 
> $@

-O0 ?!
yeah. that should not work.
always use -O2 for llvm or don't specify it at all and keep -O2 for clang.
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