The “LLVM build” in the -v output indicates you have an llvm-enabled gcc (i.e., llvm-gcc). The binaries are just named “gcc” and “g++” by default, just like with vanilla gcc. Use --program-prefix=llvm- on your configure line for llvm-gcc to have them named llvm-*.
Your questions will get more visibility and a higher likelihood of being answered if you direct them to the llvmdev list rather than the llvm-testresults list. This list is normally used for automated test-suite results emails and responses discussing them.