[llvm] [LLVM] Add a C API for creating instructions with custom syncscopes. (PR #104775)

[Nikita Popov via llvm-commits]

================
@@ -146,6 +146,24 @@ unsigned LLVMGetMDKindID(const char *Name, unsigned SLen) {
   return LLVMGetMDKindIDInContext(LLVMGetGlobalContext(), Name, SLen);
 }
 
+unsigned LLVMGetSyncScopeIDInContext(LLVMContextRef C, const char *Name,
+                                     unsigned SLen) {
+  return unwrap(C)->getOrInsertSyncScopeID(StringRef(Name, SLen));
+}
+
+unsigned LLVMGetSyncScopeID(const char *Name, unsigned SLen) {
+  return LLVMGetSyncScopeIDInContext(LLVMGetGlobalContext(), Name, SLen);
+}
+
+const char *LLVMGetSyncScopeName(LLVMContextRef C, unsigned ID,
+                                 unsigned *Length) {
+  SmallVector<StringRef> SSNs;
+  unwrap(C)->getSyncScopeNames(SSNs);
+  StringRef Name = SSNs[ID].empty() ? "system" : SSNs[ID];
+  *Length = Name.size();
----------------
nikic wrote:

This implementation makes me wonder whether we really should be offering an API for this ... do you need it?

https://github.com/llvm/llvm-project/pull/104775