Xcode 4.4 Release was released on 15 Mar 2012 and requires macOS 10.7+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/xcode_4.4_21362/xcode446938108a.dmg.
Release notes are located at https://download.developer.apple.com/Developer_Tools/xcode_4.4_21362/release_notes_xcode44gm.pdf.
The SDKs it contains are:
- iOS 9B174
The compilers it contains are:
- clang 4.0 (Build 421.0.57)
- LLVM-GCC (Build 2336.11.00)