Nodes created with `getMemIntrinsicNode` have memory operands. In order
for operands to be propagated to machine instructions, the nodes should
have `SDNPMemOperand` property.
Similar to 3c8c385a.
PowerPC subtargets prior to Power9 use the 'legacy' itinerary way to
provide scheduling information. This patch re-writes the tablegen file
to define the scheduling information in the new SchedModel way, which
can bring improvements to some benchmarks.
Reviewed By: shchenz
Differential Revision: https://reviews.llvm.org/D154488
When doing store constant vector/scalar, some duplicated values can be reused.
Add test case and will show combiner can improve these.
Reviewed By: shchenz
Differential Revision: https://reviews.llvm.org/D146500
