[XCore]  Return true in enableMultipleCopyHints().

Enable multiple COPY hints to eliminate more COPYs during register allocation.

Note that this is something all targets should do, see
https://reviews.llvm.org/D38128.

Review: Robert Lytton

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326069 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed