[clang] [llvm] [RISCV][VCIX] Add vcix_state to GNU inline assembly register set (PR #106914)

[Brandon Wu via cfe-commits]

================
@@ -44,7 +44,7 @@ ArrayRef<const char *> RISCVTargetInfo::getGCCRegNames() 
const {
       "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31",
 
       // CSRs
-      "fflags", "frm", "vtype", "vl", "vxsat", "vxrm"
+      "fflags", "frm", "vtype", "vl", "vxsat", "vxrm", "sf_vcix_state"
----------------
4vtomat wrote:

I think here is the root cause: 
https://github.com/llvm/llvm-project/blob/1e3a24d2e4eb63c17b962161ae6588d1b2c178f8/llvm/include/llvm/CodeGen/TargetRegisterInfo.h#L1106
Maybe we should overwrite this function for RISCV?
What do you think @jrtc27 @kito-cheng ?

https://github.com/llvm/llvm-project/pull/106914
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