[turbofan] Merge dependent Word32Equal on ARM64

test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc

Index: test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
diff --git a/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc b/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
index 7e67b31616292c8287e86d7b5ae15dbb87d1ac88..71c2d44d2f51722fe2bf6fec1dd2a5f7390006ec 100644
--- a/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
+++ b/test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc
@@ -2421,6 +2421,40 @@ TEST_F(InstructionSelectorTest, Word32EqualWithSignedExtendHalfword) {
 }
 
 
+TEST_F(InstructionSelectorTest, Word32EqualZeroWithWord32Equal) {
+  {
+    StreamBuilder m(this, kMachInt32, kMachInt32, kMachInt32);
+    Node* const p0 = m.Parameter(0);
+    Node* const p1 = m.Parameter(1);
+    m.Return(m.Word32Equal(m.Word32Equal(p0, p1), m.Int32Constant(0)));
+    Stream s = m.Build();
+    ASSERT_EQ(1U, s.size());
+    EXPECT_EQ(kArm64Cmp32, s[0]->arch_opcode());
+    ASSERT_EQ(2U, s[0]->InputCount());
+    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
+    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
+    EXPECT_EQ(1U, s[0]->OutputCount());
+    EXPECT_EQ(kFlags_set, s[0]->flags_mode());
+    EXPECT_EQ(kNotEqual, s[0]->flags_condition());
+  }
+  {
+    StreamBuilder m(this, kMachInt32, kMachInt32, kMachInt32);
+    Node* const p0 = m.Parameter(0);
+    Node* const p1 = m.Parameter(1);
+    m.Return(m.Word32Equal(m.Int32Constant(0), m.Word32Equal(p0, p1)));
+    Stream s = m.Build();
+    ASSERT_EQ(1U, s.size());
+    EXPECT_EQ(kArm64Cmp32, s[0]->arch_opcode());
+    ASSERT_EQ(2U, s[0]->InputCount());
+    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
+    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
+    EXPECT_EQ(1U, s[0]->OutputCount());
+    EXPECT_EQ(kFlags_set, s[0]->flags_mode());
+    EXPECT_EQ(kNotEqual, s[0]->flags_condition());
+  }
+}
+
+
 // -----------------------------------------------------------------------------
 // Miscellaneous