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.
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Co-authored-by: Kamil Kashapov <kashapov@ispras.ru>
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