Use ISD::ADD instead of ISD::SUB with a negated constant. This avoids trouble if the return type of TD->getPointerSize() is changed to something which doesn't promote to a signed type, and is simpler anyway.
Use ISD::ADD instead of ISD::SUB with a negated constant. This
avoids trouble if the return type of TD->getPointerSize() is
changed to something which doesn't promote to a signed type,
and is simpler anyway.

Also, use getCopyFromReg instead of getRegister to read a
physical register's value.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@110835 91177308-0d34-0410-b5e6-96231b3b80d8

dslab-epfl/asap,chubbymaggie/asap,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,chubbymaggie/asap,chubbymaggie/asap,llvm-mirror/llvm,apple/swift-llvm,chubbymaggie/asap,llvm-mirror/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,dslab-epfl/asap,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,dslab-epfl/asap,apple/swift-llvm,chubbymaggie/asap,dslab-epfl/asap,llvm-mirror/llvm,chubbymaggie/asap,dslab-epfl/asap,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,dslab-epfl/asap,dslab-epfl/asap,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm