[LLVMdev] Help needed on debugging llvm
craig.topper at gmail.com
Tue Jan 22 10:50:46 PST 2013
Are you still having issues with FMA4? I wonder if PR15040 is related. A
fix was just committed.
On Wed, Nov 7, 2012 at 3:22 AM, Anitha Boyapati
<anitha.boyapati at gmail.com>wrote:
> On 7 November 2012 15:29, Duncan Sands <baldrick at free.fr> wrote:
>> That way the output should be exactly the same as the output dragonegg
>> normally run the LLVM optimizers on, e.g. GCC constant folding and other
>> optimizations which get turned on at -O2 will still have happened
>> turns off almost all GCC optimizations by default, but turning everything
>> isn't practical).
>> Running the output through "opt -O2" should then do the same
>> optimizations as
>> dragonegg would have done. I say "should" because in my experience this
>> always true, though it is supposed to be true.
>> Next comes the codegen stage, which you can emulate using llc (or clang
>> you do below, but llc is more direct). It isn't that easy finding out
>> what flags dragonegg passes to llc, so this might be a bit painful.
> Yes. This is probably what I need now. Code Generation options used by
> dragonegg vs clang (or llc as I referred to in last email).
> Thanks for all the suggestions.
> - Anitha
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
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