[clang] [X86][CFE] Support EGPR in inline assembly. (PR #91323)

[Freddy Ye via cfe-commits]

================
@@ -1763,10 +1823,14 @@ void 
X86TargetInfo::fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) con
 }
 
 ArrayRef<const char *> X86TargetInfo::getGCCRegNames() const {
+  if (HasEGPR)
+    return llvm::ArrayRef(ExtendedGCCRegNames);
   return llvm::ArrayRef(GCCRegNames);
----------------
FreddyLeaf wrote:

I noticed gcc did so. it reports error without -mapxf when compiling `r16`. 
reasonable to me.

https://github.com/llvm/llvm-project/pull/91323
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