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0187c02
2012 Dec 13
0
[LLVMdev] Question about FMA formation
...ation happens prior to
codegen then fast-isel will just handle whatever new instruction you've
got. An example of IR would be useful though :)
-eric
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2012 Dec 13
2
[LLVMdev] Question about FMA formation
On Dec 12, 2012, at 4:49 PM, Shuxin Yang <shuxin.llvm at gmail.com> wrote:
> Hi, Eli, Mike and Lang:
>
> Thank you all for the input. This is one e.g which might be difficult for isel:
> a*b + c*d + e => a*b + (c*d + e).
>
You hit send right when I did!
For your example, do you mean that it's grouped like:
(fadd (fadd (fmul a b) (fmul c d)) e)
How would your