1 files changed, 19 insertions, 0 deletions
diff --git a/unittests/Core/ArchSpecTest.cpp b/unittests/Core/ArchSpecTest.cpp
index 32b363652f75..8fed7adba07c 100644
--- a/unittests/Core/ArchSpecTest.cpp
+++ b/unittests/Core/ArchSpecTest.cpp
@@ -134,3 +134,22 @@ TEST(ArchSpecTest, TestSetTriple) {
   AS = ArchSpec();
   EXPECT_FALSE(AS.SetTriple(""));
 }
+
+TEST(ArchSpecTest, MergeFrom) {
+  ArchSpec A;
+  ArchSpec B("x86_64-pc-linux");
+
+  EXPECT_FALSE(A.IsValid());
+  ASSERT_TRUE(B.IsValid());
+  EXPECT_EQ(llvm::Triple::ArchType::x86_64, B.GetTriple().getArch());
+  EXPECT_EQ(llvm::Triple::VendorType::PC, B.GetTriple().getVendor());
+  EXPECT_EQ(llvm::Triple::OSType::Linux, B.GetTriple().getOS());
+  EXPECT_EQ(ArchSpec::eCore_x86_64_x86_64, B.GetCore());
+
+  A.MergeFrom(B);
+  ASSERT_TRUE(A.IsValid());
+  EXPECT_EQ(llvm::Triple::ArchType::x86_64, A.GetTriple().getArch());
+  EXPECT_EQ(llvm::Triple::VendorType::PC, A.GetTriple().getVendor());
+  EXPECT_EQ(llvm::Triple::OSType::Linux, A.GetTriple().getOS());
+  EXPECT_EQ(ArchSpec::eCore_x86_64_x86_64, A.GetCore());
+}