[X86] resolveTargetShuffleInputs - add depth to limit recursion.
[X86] resolveTargetShuffleInputs - add depth to limit recursion.

Avoids slow downs from calls to ComputeNumSignBits/computeKnownBits going too deep.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@367240 91177308-0d34-0410-b5e6-96231b3b80d8

GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm