Fix SCEV memory error #4027

Job	Run time
Enzyme CI LLVM 11 Release macOS	7m 27s
Enzyme CI LLVM 11 Debug macOS	5m 11s
Enzyme CI LLVM 12 Release macOS	11m 23s
Enzyme CI LLVM 12 Debug macOS	5m 10s
Enzyme CI LLVM 13 Release macOS	6m 41s
Enzyme CI LLVM 13 Debug macOS	11m 2s
Enzyme CI LLVM 11 Release ubuntu-20.04	4m 19s
Enzyme CI LLVM 14 Release macOS	7m 20s
Enzyme CI LLVM 11 Debug ubuntu-20.04	7m 10s
Enzyme CI LLVM 14 Debug macOS	10m 7s
Enzyme CI LLVM 12 Release ubuntu-20.04	7m 16s
Enzyme CI LLVM 15 Release macOS	10m 33s
Enzyme CI LLVM 12 Debug ubuntu-20.04	6m 8s
Enzyme CI LLVM 15 Debug macOS	8m 12s
Enzyme CI LLVM 13 Release ubuntu-20.04	8m 1s
Enzyme CI LLVM 13 Debug ubuntu-20.04	7m 20s
Enzyme CI LLVM 14 Release ubuntu-20.04	7m 40s
Enzyme CI LLVM 13 Release macOS XCode	7m 50s
Enzyme CI LLVM 14 Debug ubuntu-20.04	8m 12s
Enzyme CI LLVM 15 Release ubuntu-20.04	4m 40s
Enzyme CI LLVM 15 Debug ubuntu-20.04	7m 22s
Enzyme CI LLVM 16 Release ubuntu-20.04	8m 34s
Enzyme CI LLVM 16 Debug ubuntu-20.04	7m 17s
	2h 54m 55s

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