[clang] [llvm] [RISCV] Add MC layer support for Zicfiss. (PR #66043)

[Craig Topper via cfe-commits]

================
@@ -1024,6 +1024,7 @@ static const char *ImpliedExtsZfinx[] = {"zicsr"};
 static const char *ImpliedExtsZhinx[] = {"zhinxmin"};
 static const char *ImpliedExtsZhinxmin[] = {"zfinx"};
 static const char *ImpliedExtsZicntr[] = {"zicsr"};
+static const char *ImpliedExtsZicfiss[] = {"zicsr", "zimop", "zcmop"};
----------------
topperc wrote:

Here's my issue https://github.com/riscv/riscv-cfi/issues/201#issuecomment-1871383717. From the response I got, I think we should drop Zcmop here and make the CompressPat depend on Zcmop.

https://github.com/llvm/llvm-project/pull/66043