The fma mutate test will not exercise what it was intended to test
once we simplify those ops immediately, but the test will still
pass with the existing CHECKs, so I'm leaving it in case that
still has minimal value.
llvm-svn: 373149
When trying to combine a DAG that builds a vector out of sign-extensions of
vector extracts, the code assumes legal input types. Due to that, we have to
disable this combine prior to legalization.
In some cases, the DAG will look slightly different after legalization so
account for that in the matching code.
This is a fix for https://bugs.llvm.org/show_bug.cgi?id=38087
Differential Revision: https://reviews.llvm.org/D49080
llvm-svn: 339769
Sanjay Patel