diff --git a/llvm/unittests/Analysis/VectorFunctionABITest.cpp b/llvm/unittests/Analysis/VectorFunctionABITest.cpp
--- a/llvm/unittests/Analysis/VectorFunctionABITest.cpp
+++ b/llvm/unittests/Analysis/VectorFunctionABITest.cpp
@@ -447,6 +447,45 @@
   EXPECT_EQ(ScalarName, "sin");
 }
 
+TEST_F(VFABIParserTest, ParseMaskingLLVM) {
+  EXPECT_TRUE(invokeParser("_ZGV_LLVM_M2v_sin(custom_vector_sin)"));
+  EXPECT_EQ(VF, (unsigned)2);
+  EXPECT_TRUE(IsMasked());
+  EXPECT_FALSE(IsScalable);
+  EXPECT_EQ(ISA, VFISAKind::LLVM);
+  EXPECT_EQ(Parameters.size(), (unsigned)2);
+  EXPECT_EQ(Parameters[0], VFParameter({0, VFParamKind::Vector}));
+  EXPECT_EQ(Parameters[1], VFParameter({1, VFParamKind::GlobalPredicate}));
+  EXPECT_EQ(ScalarName, "sin");
+  EXPECT_EQ(VectorName, "custom_vector_sin");
+}
+
+TEST_F(VFABIParserTest, ParseScalableMaskingLLVM) {
+  EXPECT_TRUE(invokeParser("_ZGV_LLVM_Mxv_sin(custom_vector_sin)"));
+  EXPECT_TRUE(IsMasked());
+  EXPECT_TRUE(IsScalable);
+  EXPECT_EQ(ISA, VFISAKind::LLVM);
+  EXPECT_EQ(Parameters.size(), (unsigned)2);
+  EXPECT_EQ(Parameters[0], VFParameter({0, VFParamKind::Vector}));
+  EXPECT_EQ(Parameters[1], VFParameter({1, VFParamKind::GlobalPredicate}));
+  EXPECT_EQ(ScalarName, "sin");
+  EXPECT_EQ(VectorName, "custom_vector_sin");
+}
+
+TEST_F(VFABIParserTest, ParseScalableMaskingLLVMSincos) {
+  EXPECT_TRUE(invokeParser("_ZGV_LLVM_Mxvl8l8_sincos(custom_vector_sincos)"));
+  EXPECT_TRUE(IsMasked());
+  EXPECT_TRUE(IsScalable);
+  EXPECT_EQ(ISA, VFISAKind::LLVM);
+  EXPECT_EQ(Parameters.size(), (unsigned)4);
+  EXPECT_EQ(Parameters[0], VFParameter({0, VFParamKind::Vector}));
+  EXPECT_EQ(Parameters[1], VFParameter({1, VFParamKind::OMP_Linear, 8}));
+  EXPECT_EQ(Parameters[2], VFParameter({2, VFParamKind::OMP_Linear, 8}));
+  EXPECT_EQ(Parameters[3], VFParameter({3, VFParamKind::GlobalPredicate}));
+  EXPECT_EQ(ScalarName, "sincos");
+  EXPECT_EQ(VectorName, "custom_vector_sincos");
+}
+
 class VFABIAttrTest : public testing::Test {
 protected:
   void SetUp() override {