[LLVMdev] X + 0.0
dalej at apple.com
Mon Jul 26 12:57:37 PDT 2010
On Jul 26, 2010, at 12:38 PMPDT, Jochen Wilhelmy wrote:
>> The DAGCombiner appears to do both of these with -enable-unsafe-fp-
>> math .
> But isn't the DAGCombiner a part of the back-end? Is it possible to
> get llvm ir
> out of the DAGCombiner? Do you mean the SelectionDAG?
I mean the pass found in DAGCombiner.cpp, which works on the
SelectionDAG form, yes.
> I further process llvm ir and therefore need a "best possible"
> optimization on llvm ir.
Currently we don't do any unsafe-math opts in InstCombine. Not sure
if this is policy or if it's just that nobody's implemented it.
More information about the llvm-dev