Post inc fixes
Created by: MaryBennett
Added GET_CODE (XEXP (XEXP (op, 0), 1) == REG to ensure no register to immediate normal load/stores.
Files Changed:
- gcc/config/riscv/corev.md: Tidy up.
- gcc/config/riscv/riscv-protos.h: Likewise.
- gcc/config/riscv/predicates.md: Ensure no register to immediate normal load/stores.
- gcc/config/riscv/riscv.cc: Likewise.
- gcc/testsuite/gcc.target/riscv/cv-mem-lw-compile-4.c: Added new test to check for illegal corev register to immediate load/ stores.
- gcc/testsuite/gcc.target/riscv/cv-mem-sw-compile-4.c: Likewise.