Displaying 3 results from an estimated 3 matches for "islegalorcustom".
2013 Aug 09
2
[LLVMdev] Making MipsOptimizeMathLibCalls generic
MipsOptimizeMathLibCalls.cpp converts:
g = sqrt (f);
into:
r1 = sqrt (f) readonly;
if (g is a NaN)
r2 = sqrt (f);
g = phi (r1, r2)
I'd like to do the same on z. Would it be OK to make this pass generic
and do the transformation whenever FSQRT isLegalOrCustom for the type?
If so, should it stay a separate pass, or should I merge it with
something else?
Thanks,
Richard
2013 Aug 16
0
[LLVMdev] Making MipsOptimizeMathLibCalls generic
...alls.cpp converts:
>
> g = sqrt (f);
>
> into:
>
> r1 = sqrt (f) readonly;
> if (g is a NaN)
> r2 = sqrt (f);
> g = phi (r1, r2)
>
> I'd like to do the same on z. Would it be OK to make this pass generic
> and do the transformation whenever FSQRT isLegalOrCustom for the type?
>
> If so, should it stay a separate pass, or should I merge it with
> something else?
>
> Thanks,
> Richard
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
> h...
2013 Mar 16
0
[LLVMdev] Expand action on FSUB with vector types causes both "Vector Unroll" and "Add+Negate"
...to get one and not the other? I don't want the unroll aspect
of the Expand action.
I changed to a Custom lowering and duplicated the FADD+FNEG action, but the
dag-combine2 stage moved this back to FSUB, which then failed to pattern
match in Select. That code checks for !LegalOperations ||
TLI.isLegalorCustom(FSUB), which of course is true for this case.
Suggestions?
Thanks,
Joe
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