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

[Yeting Kuo via llvm-commits]

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@@ -60,12 +60,3 @@ defm SSAMOSWAP_W  : AMO_rr_aq_rl<0b01001, 0b010, "ssamoswap.w">;
 
 let Predicates = [HasStdExtZicfiss, IsRV64] in
 defm SSAMOSWAP_D  : AMO_rr_aq_rl<0b01001, 0b011, "ssamoswap.d">;
-
-//===----------------------------------------------------------------------===/
-// Compress Instruction tablegen backend.
-//===----------------------------------------------------------------------===//
-
-let Predicates = [HasStdExtZicfiss, HasStdExtCOrZca] in {
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yetingk wrote:

I remove some CompressPat since I don't know how to test sspush/sspopchk without transforming to compressed ones. 

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