[SCEV] Decrease the recursion threshold for CompareValueComplexity

Fixes PR32142.

r287232 accidentally increased the recursion threshold for
CompareValueComplexity from 2 to 32.  This change reverses that change
by introducing a separate flag for CompareValueComplexity's threshold.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296992 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed