Fix layers with pre-inst funcs from being loaded erroneously #2835

Job	Run time
codegen	12s
linux-32-no-asm	2m 11s
chromium	1m 21s
linux-32 (Debug)	1m 54s
linux (gcc, g++, Debug, ubuntu-20.04)	2m 38s
linux-32 (Release)	2m 11s
linux-no-asm	3m 19s
linux (gcc, g++, Debug, ubuntu-22.04)	3m 14s
linux (gcc, g++, Release, ubuntu-20.04)	6m 46s
linux (gcc, g++, Release, ubuntu-22.04)	6m 43s
linux (clang, clang++, Debug, ubuntu-20.04)	2m 2s
linux (clang, clang++, Debug, ubuntu-22.04)	2m 43s
linux (clang, clang++, Release, ubuntu-20.04)	4m 11s
linux (clang, clang++, Release, ubuntu-22.04)	4m 45s
mingw	1m 27s
windows_vs (Win32, Debug)	3m 59s
mingw-no-asm-explicit	43s
windows_vs (Win32, Release)	5m 1s
mingw-no-asm	1m 11s
mingw-use-gas	1m 10s
windows_vs (x64, Debug)	4m 53s
windows_clang (clang, Debug)	3m 15s
windows_vs (x64, Release)	4m 47s
windows_clang (clang, Release)	2m 14s
windows_vs-no-asm (Win32)	4m 7s
windows_clang (clang-cl, Debug)	3m 6s
windows_vs-no-asm (x64)	4m 19s
windows_clang (clang-cl, Release)	2m 48s
mac (Debug, APPLE_STATIC_LOADER=ON)	5m 44s
Universal Binary Testing (STATIC ON) w/ Ninja	2m 26s
mac (Debug, APPLE_STATIC_LOADER=OFF)	6m 13s
iOS	44s
Universal Binary Testing (STATIC ON) w/ Xcode	2m 29s
mac (Release, APPLE_STATIC_LOADER=ON)	7m 2s
tvOS	50s
mac (Release, APPLE_STATIC_LOADER=OFF)	6m 48s
Universal Binary Testing (STATIC OFF) w/ Ninja	1m 50s
Universal Binary Testing (STATIC OFF) w/ Xcode	2m 44s
	2h 4m 0s

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