[LLVMdev] O3 passes
arplynn at gmail.com
Tue Apr 28 00:41:11 PDT 2009
You could run llvm-gcc with -O0 -emit-llvm and pipe to opt.
On 28/04/2009, Ryan M. Lefever <lefever at crhc.illinois.edu> wrote:
> Can I specify passes that I want run directly to llvm-gcc? I don't want
> all of -O3, for example. I tried llvm-gcc -raiseallocs ..., but that
> didn't work. I also tried running cc1 directly and it didn't take
> -raiseallocs as a parameter either.
> Duncan Sands wrote:
> > On Tuesday 28 April 2009 04:02:47 am Ryan M. Lefever wrote:
> >> I assume that when -O3 (or O2 or O1) is passed to llvm-gcc, then it
> >> utilizes opt. How do I determine what passes opt runs? How do I
> >> determine what external tools (and arguments) llvm-gcc is invoking?
> > It doesn't invoke opt, it runs the passes directly. You can see
> > what passes it is running by passing -fdebug-pass-arguments to
> > llvm-gcc.
> > Ciao,
> > Duncan.
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