[PATCH] D84729: [PowerPC] Set hasSideEffects for MFFS and MTFSF

[Qiu Chaofan via Phabricator via llvm-commits]

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`MFFS`: Move From FPSCR.

`MTFSF`: Move To FPSCR Fields under control masks.

LLVM currently doesn't model these bits well. Setting `hasSideEffects` prevents may-raise-exception FP instructions scheduled across MFFS/MTFSF.


https://reviews.llvm.org/D84729

Files:
  llvm/lib/Target/PowerPC/PPCInstrInfo.td
  llvm/test/CodeGen/PowerPC/2008-10-28-f128-i32.ll

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