Adding support for not merging some flops after &scorr. #925

Job	Run time
build-posix (ubuntu-latest, true)	5m 18s
build-posix (macos-latest, true)	4m 37s
build-posix (macos-latest, false)	4m 10s
build-posix (ubuntu-latest, false)	4m 50s
	18m 55s

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