[RISCV] Extend test/CodeGen/RISCV/callee-saved-* to test getCalleePreservedRegs
Add a caller which exhausts regs then calls another function. This allows getCalleePreservedRegs to be tested. llvm-svn: 356122
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Add a caller which exhausts regs then calls another function. This allows getCalleePreservedRegs to be tested. llvm-svn: 356122