--- /dev/null
+//===- llvm/unittest/DebugInfo/DWARFExpressionCompactPrinterTest.cpp ------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/DWARF/DWARFContext.h"
+#include "llvm/DebugInfo/DWARF/DWARFDie.h"
+#include "llvm/DebugInfo/DWARF/DWARFExpression.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/Support/DataExtractor.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Testing/Support/Error.h"
+#include "gtest/gtest.h"
+#include "DwarfGenerator.h"
+
+using namespace llvm;
+using namespace dwarf;
+
+namespace {
+class DWARFExpressionCompactPrinterTest : public ::testing::Test {
+public:
+ std::unique_ptr<MCRegisterInfo> MRI;
+
+ DWARFExpressionCompactPrinterTest() {
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmPrinters();
+
+ std::string TripleName = "armv8a-linux-gnueabi";
+ std::string ErrorStr;
+
+ const Target *TheTarget =
+ TargetRegistry::lookupTarget(TripleName, ErrorStr);
+
+ if (!TheTarget)
+ return;
+
+ MRI.reset(TheTarget->createMCRegInfo(TripleName));
+ }
+
+ void TestExprPrinter(ArrayRef<uint8_t> ExprData, StringRef Expected);
+};
+} // namespace
+
+void DWARFExpressionCompactPrinterTest::TestExprPrinter(
+ ArrayRef<uint8_t> ExprData, StringRef Expected) {
+ // If we didn't build ARM, do not run the test.
+ if (!MRI)
+ return;
+
+ // Print the expression, passing in the subprogram DIE, and check that the
+ // result is as expected.
+ std::string Result;
+ raw_string_ostream OS(Result);
+ DataExtractor DE(ExprData, true, 8);
+ DWARFExpression Expr(DE, 8);
+ Expr.printCompact(OS, *MRI);
+ EXPECT_EQ(OS.str(), Expected);
+}
+
+TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_reg0) {
+ TestExprPrinter({DW_OP_reg0}, "R0");
+}
+
+TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_reg10) {
+ TestExprPrinter({DW_OP_reg10}, "R10");
+}
+
+TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_regx) {
+ TestExprPrinter({DW_OP_regx, 0x80, 0x02}, "D0");
+}