[llvm-dev] LLVM Vectorisation Bug

[hameeza ahmed via llvm-dev]

I have matrix multiplication and stencil code. I vectorise it through the
following command.

opt  -S -O3 -force-vector-width=2048 stencil.ll -o stencil_o3.ll

in both the examples of matrix mult and stencil it vectorises fine when my
loop iterations >2048. but if i keep both iterations and vector width=2048.
it produces scalar code IR not vectorizes it.

Is it llvm bug?

Please help me.
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