[PPC] cleanup of mayLoad/mayStore flags and memory operands.
1) Explicitly sets mayLoad/mayStore property in the tablegen files on load/store
instructions.
2) Updated the flags on a number of intrinsics indicating that they write
memory.
3) Added SDNPMemOperand flags for some target dependent SDNodes so that they
propagate their memory operand
Review: https://reviews.llvm.org/D28818
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293200 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed