1 files changed, 78 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Sema/SemaMSP430.cpp b/contrib/llvm-project/clang/lib/Sema/SemaMSP430.cpp
new file mode 100644
index 000000000000..4038a1ff61d6
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Sema/SemaMSP430.cpp
@@ -0,0 +1,78 @@
+//===------ SemaMSP430.cpp ----- MSP430 target-specific routines ----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements semantic analysis functions specific to NVPTX.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Sema/SemaMSP430.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/DeclBase.h"
+#include "clang/Basic/DiagnosticSema.h"
+#include "clang/Sema/Attr.h"
+#include "clang/Sema/ParsedAttr.h"
+
+namespace clang {
+
+SemaMSP430::SemaMSP430(Sema &S) : SemaBase(S) {}
+
+void SemaMSP430::handleInterruptAttr(Decl *D, const ParsedAttr &AL) {
+  // MSP430 'interrupt' attribute is applied to
+  // a function with no parameters and void return type.
+  if (!isFuncOrMethodForAttrSubject(D)) {
+    Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type)
+        << AL << AL.isRegularKeywordAttribute() << ExpectedFunctionOrMethod;
+    return;
+  }
+
+  if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) {
+    Diag(D->getLocation(), diag::warn_interrupt_attribute_invalid)
+        << /*MSP430*/ 1 << 0;
+    return;
+  }
+
+  if (!getFunctionOrMethodResultType(D)->isVoidType()) {
+    Diag(D->getLocation(), diag::warn_interrupt_attribute_invalid)
+        << /*MSP430*/ 1 << 1;
+    return;
+  }
+
+  // The attribute takes one integer argument.
+  if (!AL.checkExactlyNumArgs(SemaRef, 1))
+    return;
+
+  if (!AL.isArgExpr(0)) {
+    Diag(AL.getLoc(), diag::err_attribute_argument_type)
+        << AL << AANT_ArgumentIntegerConstant;
+    return;
+  }
+
+  Expr *NumParamsExpr = static_cast<Expr *>(AL.getArgAsExpr(0));
+  std::optional<llvm::APSInt> NumParams = llvm::APSInt(32);
+  if (!(NumParams = NumParamsExpr->getIntegerConstantExpr(getASTContext()))) {
+    Diag(AL.getLoc(), diag::err_attribute_argument_type)
+        << AL << AANT_ArgumentIntegerConstant
+        << NumParamsExpr->getSourceRange();
+    return;
+  }
+  // The argument should be in range 0..63.
+  unsigned Num = NumParams->getLimitedValue(255);
+  if (Num > 63) {
+    Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds)
+        << AL << (int)NumParams->getSExtValue()
+        << NumParamsExpr->getSourceRange();
+    return;
+  }
+
+  D->addAttr(::new (getASTContext())
+                 MSP430InterruptAttr(getASTContext(), AL, Num));
+  D->addAttr(UsedAttr::CreateImplicit(getASTContext()));
+}
+
+} // namespace clang