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Changes

Summary

  1. [LoopUnroll] Make DomTree explicitly required (NFC) (details)
  2. Revert "[libc++] NFC: Move unwrap_iter to its own header" (details)
  3. [gn build] Port b13edf6e907b (details)
Commit 625920dabf49443d76ae05f954b0aabe33a76eba by nikita.ppv
[LoopUnroll] Make DomTree explicitly required (NFC)

Some of the code was already assuming that DT is non-null, so
make that requirement more explicit and remove unnecessary null
checks.
The file was modifiedllvm/lib/Transforms/Utils/LoopUnroll.cpp
Commit b13edf6e907b32d0b8da09dfe08fa271638eca3c by koraq
Revert "[libc++] NFC: Move unwrap_iter to its own header"

This reverts commit 9968896cd62a62b11ac61085534dd598c4bd3c60.

This commit seems to cause the build failures of main.
The file was removedlibcxx/include/__algorithm/unwrap_iter.h
The file was modifiedlibcxx/include/algorithm
The file was modifiedlibcxx/include/CMakeLists.txt
Commit 42910da585d368208365247e6616f80880d5cc3e by llvmgnsyncbot
[gn build] Port b13edf6e907b
The file was modifiedllvm/utils/gn/secondary/libcxx/include/BUILD.gn