[turbofan] Improve testability of the InstructionSelector.

test/cctest/compiler/test-instruction-selector-ia32.cc

Index: test/cctest/compiler/test-instruction-selector-ia32.cc
diff --git a/test/cctest/compiler/test-instruction-selector-ia32.cc b/test/cctest/compiler/test-instruction-selector-ia32.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b6509584e068acc7ce888fbb356391c321820aaf
--- /dev/null
+++ b/test/cctest/compiler/test-instruction-selector-ia32.cc
@@ -0,0 +1,66 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "test/cctest/compiler/instruction-selector-tester.h"
+#include "test/cctest/compiler/value-helper.h"
+
+using namespace v8::internal;
+using namespace v8::internal::compiler;
+
+TEST(InstructionSelectorInt32AddP) {
+  InstructionSelectorTester m;
+  m.Return(m.Int32Add(m.Parameter(0), m.Parameter(1)));
+  m.SelectInstructions();
+  CHECK_EQ(1, m.code.size());
+  CHECK_EQ(kIA32Add, m.code[0]->arch_opcode());
+}
+
+
+TEST(InstructionSelectorInt32AddImm) {
+  FOR_INT32_INPUTS(i) {
+    int32_t imm = *i;
+    {
+      InstructionSelectorTester m;
+      m.Return(m.Int32Add(m.Parameter(0), m.Int32Constant(imm)));
+      m.SelectInstructions();
+      CHECK_EQ(1, m.code.size());
+      CHECK_EQ(kIA32Add, m.code[0]->arch_opcode());
+      CHECK_EQ(2, m.code[0]->InputCount());
+      CHECK_EQ(imm, m.ToInt32(m.code[0]->InputAt(1)));
+    }
+    {
+      InstructionSelectorTester m;
+      m.Return(m.Int32Add(m.Int32Constant(imm), m.Parameter(0)));
+      m.SelectInstructions();
+      CHECK_EQ(1, m.code.size());
+      CHECK_EQ(kIA32Add, m.code[0]->arch_opcode());
+      CHECK_EQ(2, m.code[0]->InputCount());
+      CHECK_EQ(imm, m.ToInt32(m.code[0]->InputAt(1)));
+    }
+  }
+}
+
+
+TEST(InstructionSelectorInt32SubP) {
+  InstructionSelectorTester m;
+  m.Return(m.Int32Sub(m.Parameter(0), m.Parameter(1)));
+  m.SelectInstructions();
+  CHECK_EQ(1, m.code.size());
+  CHECK_EQ(kIA32Sub, m.code[0]->arch_opcode());
+  CHECK_EQ(1, m.code[0]->OutputCount());
+}
+
+
+TEST(InstructionSelectorInt32SubImm) {
+  FOR_INT32_INPUTS(i) {
+    int32_t imm = *i;
+    InstructionSelectorTester m;
+    m.Return(m.Int32Sub(m.Parameter(0), m.Int32Constant(imm)));
+    m.SelectInstructions();
+    CHECK_EQ(1, m.code.size());
+    CHECK_EQ(kIA32Sub, m.code[0]->arch_opcode());
+    CHECK_EQ(2, m.code[0]->InputCount());
+    CHECK_EQ(imm, m.ToInt32(m.code[0]->InputAt(1)));
+  }
+}