As discussed in https://github.com/llvm/llvm-project/pull/109284 Copied msan tests from 64-bit platforms to following 32-bit platforms: * MIPS * ARM * RISCV * PowerPC * i386 Most of the tests have been copied form mips64. Target triple and test contents have not been changed: to be done in next PR. --------- Co-authored-by: Kamil Kashapov <kashapov@ispras.ru>