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

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``````````bash
git-clang-format --diff origin/main HEAD --extensions c,cpp,h -- clang/test/CodeGen/AArch64/pcdphint-atomic-store.c clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp clang/lib/CodeGen/TargetBuiltins/ARM.cpp clang/lib/Headers/arm_acle.h clang/lib/Sema/SemaARM.cpp llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp --diff_from_common_commit
``````````

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changing `origin/main` to the base branch/commit you want to compare against.
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/TargetBuiltins/ARM.cpp b/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
index 29cf378db..eb3844707 100644
--- a/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
+++ b/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
@@ -5296,11 +5296,11 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
     const Expr *Arg2 = E->getArg(2);
     const Expr *Arg3 = E->getArg(3);
 
-    Value *StoreAddr  = EmitScalarExpr(Arg0);
+    Value *StoreAddr = EmitScalarExpr(Arg0);
     Value *StoreValue = EmitScalarExpr(Arg1);
 
     llvm::APSInt OrderVal = Arg2->EvaluateKnownConstInt(getContext());
-    llvm::APSInt RetVal   = Arg3->EvaluateKnownConstInt(getContext());
+    llvm::APSInt RetVal = Arg3->EvaluateKnownConstInt(getContext());
 
     llvm::AtomicOrdering Ordering;
     switch (OrderVal.getZExtValue()) {

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