With lax vector conversions (the default) make sure we convert between two
vectors that are the same size. Fix up testcases accordingly and add a new one
to make sure we still error if lax vector conversions are disabled.

Fixes rdar://8328190


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112122 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed