llvm-project

3e5d8a14 - Reapply "RuntimeLibcalls: Generate table of libcall name lengths (#153… (#153864)

Reapply "RuntimeLibcalls: Generate table of libcall name lengths (#153… (#153864) This reverts commit 334e9bf2dd01fbbfe785624c0de477b725cde6f2. Check if llvm-nm exists before building the benchmark.