This adds support for creating an InstAlias with a negative immediate, i.e.:
def NOT : InstAlias<"not $dst, $src", (XORI GR32:$dst, GR32:$src, -1)>;
by resolving this problem:
RISCVGenAsmMatcher.inc:95:11: error: expected '= constant-expression' or end of enumerator definition
CVT_imm_-1,
^^^^^^^^^^
Patch by Jordy Potman, thanks!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226073 91177308-0d34-0410-b5e6-96231b3b80d8