[clang] [llvm] [AArch64][clang][llvm] Add ACLE `stshh` atomic store builtin (PR #181386)

[via llvm-commits]

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@@ -1842,8 +1842,10 @@ def PHintInstOperand : AsmOperandClass {
 
 def phint_op : Operand<i32> {
     let ParserMatchClass = PHintInstOperand;
-   let PrintMethod = "printPHintOp";
-   let OperandType = "OPERAND_IMMEDIATE";
+    let PrintMethod = "printPHintOp";
+    let OperandType = "OPERAND_IMMEDIATE";
+    let MIOperandInfo = (ops i32imm);
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CarolineConcatto wrote:

nit: can we do 
let MIOperandInfo = (ops i32imm: $policy);

https://github.com/llvm/llvm-project/pull/181386