[AVX512] Replace scalar fp arithmetic intrinsics with native IR in an AVX512 test. The intrinsics aren't lowered to AVX512 instructions.
[AVX512] Replace scalar fp arithmetic intrinsics with native IR in an AVX512 test. The intrinsics aren't lowered to AVX512 instructions.

The intrinsics really should be removed and autoupgraded.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@277320 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm