[LLVMdev] How to use LLVM optimizations with clang

[Duncan Sands]

> Yes. But how exactly code generation (optimized one) be done without
> clang. Is it possible that we can specify those optimization
> (individual ones instead of standard ones like -O3) some how when
> generating code as is done by clang or llc?

llc comb.ll
gcc -o comb comb.s

Variants:
   llc -O0 comb.ll
   llc -O3 comb.ll
etc

Note that the codegen level optimizations done by llc have nothing to do with
the IR level optimizations of the kind performed by opt.

Ciao, Duncan.