Teach ScalarEvolution how to fold trunc(undef) and anyext(undef) to undef.
This helps LSR behave more consistently on bugpoint-reduced testcases.

llvm-svn: 108451
1 file changed
tree: 768bb4d2a75fd2fd481db00e1a0f7b499b6da163
  1. clang/
  2. compiler-rt/
  3. libcxx/
  4. lldb/
  5. llvm/