[clang] [CIR] Add atomic load and store operations (PR #153814)

[Sirui Mu via cfe-commits]

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@@ -187,12 +244,85 @@ void AtomicInfo::emitCopyIntoMemory(RValue rvalue) const {
   }
 }
 
+static void emitAtomicOp(CIRGenFunction &cgf, AtomicExpr *expr, Address dest,
+                         Address ptr, Address val1, uint64_t size,
+                         cir::MemOrder order) {
+  std::unique_ptr<AtomicScopeModel> scopeModel = expr->getScopeModel();
+  if (scopeModel) {
+    assert(!cir::MissingFeatures::atomicScope());
+    cgf.cgm.errorNYI(expr->getSourceRange(), "emitAtomicOp: atomic scope");
+    return;
+  }
+
+  assert(!cir::MissingFeatures::atomicSyncScopeID());
+
+  CIRGenBuilderTy &builder = cgf.getBuilder();
+  mlir::Location loc = cgf.getLoc(expr->getSourceRange());
+  auto orderAttr = cir::MemOrderAttr::get(builder.getContext(), order);
+
+  switch (expr->getOp()) {
+  default:
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Lancern wrote:

Updated.

https://github.com/llvm/llvm-project/pull/153814