[clang] [CIR] Add limited support for array new (PR #161095)

[Andy Kaylor via cfe-commits]

================
@@ -210,6 +211,73 @@ RValue CIRGenFunction::emitCXXMemberOrOperatorCall(
   return emitCall(fnInfo, callee, returnValue, args, nullptr, loc);
 }
 
+namespace {
+/// The parameters to pass to a usual operator delete.
+struct UsualDeleteParams {
+  TypeAwareAllocationMode typeAwareDelete = TypeAwareAllocationMode::No;
+  bool destroyingDelete = false;
+  bool size = false;
+  AlignedAllocationMode alignment = AlignedAllocationMode::No;
+};
+} // namespace
+
+// FIXME(cir): this should be shared with LLVM codegen
+static UsualDeleteParams getUsualDeleteParams(const FunctionDecl *fd) {
+  UsualDeleteParams params;
+
+  const FunctionProtoType *fpt = fd->getType()->castAs<FunctionProtoType>();
+  auto ai = fpt->param_type_begin(), ae = fpt->param_type_end();
+
+  if (fd->isTypeAwareOperatorNewOrDelete()) {
+    params.typeAwareDelete = TypeAwareAllocationMode::Yes;
+    assert(ai != ae);
+    ++ai;
+  }
+
+  // The first argument after the type-identity parameter (if any) is
+  // always a void* (or C* for a destroying operator delete for class
+  // type C).
+  ++ai;
+
+  // The next parameter may be a std::destroying_delete_t.
+  if (fd->isDestroyingOperatorDelete()) {
+    params.destroyingDelete = true;
+    assert(ai != ae);
+    ++ai;
+  }
+
+  // Figure out what other parameters we should be implicitly passing.
+  if (ai != ae && (*ai)->isIntegerType()) {
+    params.size = true;
+    ++ai;
+  } else {
+    assert(!isTypeAwareAllocation(params.typeAwareDelete));
+  }
+
+  if (ai != ae && (*ai)->isAlignValT()) {
+    params.alignment = AlignedAllocationMode::Yes;
+    ++ai;
+  } else {
+    assert(!isTypeAwareAllocation(params.typeAwareDelete));
+  }
+
+  assert(ai == ae && "unexpected usual deallocation function parameter");
+  return params;
+}
----------------
andykaylor wrote:

I think this is a rebasing artifact. I deleted this code recently (it's now shared with LLVM IR codegen). Please delete it here.

https://github.com/llvm/llvm-project/pull/161095