Use information already present in the ValueTable to fast-fail when we know there won't be a value number match.  This speeds up GVN on a case where there are very few redundancies by ~25%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53108 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed