Alex Bradbury fda6037e98 [RISCV] Implement isLoadFromStackSlot and isStoreToStackSlot ...

This causes some slight shuffling but no meaningful codegen differences on the 
corpus I used for testing, but it has a larger impact when combined with e.g. 
rematerialisation. Regardless, it makes sense to report as accurate 
target-specific information as possible.

llvm-svn: 330949

2018-04-26 15:34:27 +00:00

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