14913fa5d0
https://reviews.llvm.org/D131658 found a bug in ReadPseudoRegisterValue which would mean we read out of bounds if the s register number was high enough. This adds a memory check to vpush-1-thumb, which should have been doing that anyway. Then copies that test and uses the last 4 s registers instead. Without the mentioned fix we see random values in the final memory, with the fix it passes. Reviewed By: fixathon Differential Revision: https://reviews.llvm.org/D131663