[PATCH] Make SROA handle addrspacecast

[Matt Arsenault]

The last time this came up, I was able to get instcombine to eliminate trivial addrspacecasts of alloca which worked just as well. I just never got around to actually testing / posting the patch. The main piece was just removing an outdated check for the address space mismatch from before addrspacecast existed


http://reviews.llvm.org/D10482

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