[LLVMdev] Disable memset synthesization

[Bin Tzeng]

Hi all,

LLVM is smart that it can synthesize llvm.memset, llvm.memcpy etc. from
loops, which can be lowered into calls to memset, memcpy and so on. Is
there an option that can disable this optimization? For some cases, I do
not want the code to depend on libc.

Thanks in advance!
Bin
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