[PATCH] Add Cortex-A9 scheduling classes for vldm/vstm instructions that access more than 32 bytes

[Silviu Baranga]

Hi,

This patch fixes a codegen failure when targeting Cortex-A9.

The compiler asserts in the scheduling phase when trying to schedule vstm/vldm
instructions that access more than 32 bytes of memory. This is because it cannot
match any scheduling class for these instructions.

The patch also adds a regression test for this failure. It's somewhat large, but
bugpoint won't reduce it further.

Please review!

Thanks,
Silviu

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