Update deprecated LLVM api #3624

Job	Run time
macOS / Release / homebrew-clang	9m 19s
Ubuntu / Release / gcc	22m 58s
macOS / Debug / homebrew-clang	6m 36s
Ubuntu / Debug / gcc	17m 25s
macOS / Release / system-clang	6m 2s
Ubuntu / Release / clang	19m 47s
macOS / Debug / system-clang	6m 43s
Ubuntu / Debug / clang	15m 6s
Windows / Release / cl	34m 57s
Windows / Release / clang	33m 19s
Windows / Release / clang-cl	33m 47s
Windows / Debug / cl	30m 28s
Windows / Debug / clang	28m 56s
Windows / Debug / clang-cl	29m 16s
	4h 54m 39s

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