[LLVMdev] comparing -O5 to -std-compile-opts

[Ryan M. Lefever]

Let's say I have 2 bytecode files, X.bc and Y.bc that I want to combine
into Z.bc.  Which of the following command sequences will produce more
optimized code?

Sequence 1:
   llvm-link -o tmp.bc X.bc Y.bc
   opt -std-compile-opts -o Z.bc tmp.bc

Sequence 2:
   llvm-ld -O5 -o Z.bc X.bc Y.bc

Without looking at details it seems like sequence 2 should produce the
most optimized code.  As a follow up, where does -std-compile-opts fall
within -O1 to -O5?

Thanks,
Ryan