tree 121179213696d02f9dc8cac4a58c7a909cfac64b
parent 100a94bc93dcf9af99eba169599ce950faf0df7e
author Hal Finkel <hfinkel@anl.gov> 1363292507 +0000
committer Hal Finkel <hfinkel@anl.gov> 1363292507 +0000

Use frame-index scavenging for PPC register spilling

Make requiresFrameIndexScavenging return true, and create virtual registers in
the spilling code instead of using the register scavenger directly. This makes
the target-level code simpler, and importantly, delays the scavenging until
after callee-saved register processing (which will be important for later
changes).

Also cleans up trackLivenessAfterRegAlloc (makes it inline in the header with
the other related functions). This makes it clear that it always returns true.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177107 91177308-0d34-0410-b5e6-96231b3b80d8