[NFC] Move verificaiton check for f128 conversion into LowerINT_TO_FP()
[NFC] Move verificaiton check for f128 conversion into LowerINT_TO_FP()

Move veriication check for legal conversions to f128 into LowerINT_TO_FP()
and fix some indentations to match other sections of the code for readability.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@330138 91177308-0d34-0410-b5e6-96231b3b80d8

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