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91674418
2013 Oct 30
0
[LLVMdev] loop vectorizer
The SLP vectorizer apparently did something in the prologue of the
function (where storing of arguments on the stack happens) which then
got eliminated later on (since I don't see any vector instructions in
the final IR). Below the debug output of the SLP pass:
Args: opt -O1 -vectorize-slp -debug loop.ll -S
SLP: Analyzing blocks in _Z3barmmPfS_S_.
SLP: Found 2 stores to vectorize.
SLP:
2013 Oct 30
3
[LLVMdev] loop vectorizer
----- Original Message -----
>
>
> I ran the BB vectorizer as I guess this is the SLP vectorizer.
No, while the BB vectorizer is doing a form of SLP vectorization, there is a separate SLP vectorization pass which uses a different algorithm. You can pass -vectorize-slp to opt.
-Hal
>
> BBV: using target information
> BBV: fusing loop #1 for for.body in _Z3barmmPfS_S_...