dominated by Root, check that B is available throughout the scope. This
is obviously true (famous last words?) given the current logic, but the
check may be helpful if more complicated reasoning is added one day.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153323
91177308-0d34-0410-b5e6-
96231b3b80d8
+ assert((!isa<Instruction>(RHS) ||
+ DT->properlyDominates(cast<Instruction>(RHS)->getParent(), Root)) &&
+ "Instruction doesn't dominate scope!");
// If value numbering later deduces that an instruction in the scope is equal
// to 'LHS' then ensure it will be turned into 'RHS'.
// If value numbering later deduces that an instruction in the scope is equal
// to 'LHS' then ensure it will be turned into 'RHS'.