"Hidden" LLVM flags

Jan Stolarek jan.stolarek at p.lodz.pl
Wed Nov 5 14:02:24 UTC 2014

DynFlags list some LLVM flags as "hidden":

  ( "llvm-tbaa",                        Opt_LlvmTBAA, nop), -- hidden flag
  ( "llvm-pass-vectors-in-regs",        Opt_LlvmPassVectorsInRegisters, nop), -- hidden flag

Do I undertsand correctly that "hidden" means "not documented in the User's Guide"? Is there a 
good reason for this? I'd like to document them as part of #9358, especially that -fllvm-tbaa is 
enabled by default for all optimisation levels.


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