41cece8c86
This patch adds the -fvectorize and -fno-vectorize flags to flang. Note that this also changes the behaviour of `flang -fc1` to match that of `clang -cc1`, which is that vectorization is only enabled in the presence of the `-vectorize-loops` flag. Additionally, this patch changes the behaviour of the default optimisation levels to match clang, such that vectorization only happens at the same levels as it does there. This patch is in draft while I write an RFC to discuss the above two changes.
Flang Integration Tests
This directory can be used to add Integration tests involving multiple stages of the compiler (for eg. from Fortran to LLVM IR). It should not contain executable tests. We should only add tests here sparingly and only if there is no other way to test. Repeat this message in each test that is added to this directory and sub-directories.