[turbofan] Add backend support for Float32Constant.

src/compiler/instruction-selector-unittest.cc

 // 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 "src/compiler/instruction-selector-unittest.h"
 
 #include "src/compiler/compiler-test-utils.h"
 #include "src/flags.h"
 
 namespace v8 {
@@ skipping 95 matching lines @@
         InstructionSequence::StateId::FromInt(i)));
   }
   return s;
 }
 
 
 // -----------------------------------------------------------------------------
 // Return.
 
 
+TARGET_TEST_F(InstructionSelectorTest, ReturnFloat32Constant) {
+  const float kValue = 4.2f;
+  StreamBuilder m(this, kMachFloat32);
+  m.Return(m.Float32Constant(kValue));
+  Stream s = m.Build(kAllInstructions);
+  ASSERT_EQ(2U, s.size());
+  EXPECT_EQ(kArchNop, s[0]->arch_opcode());
+  ASSERT_EQ(InstructionOperand::CONSTANT, s[0]->OutputAt(0)->kind());
+  EXPECT_FLOAT_EQ(kValue, s.ToFloat32(s[0]->OutputAt(0)));
+  EXPECT_EQ(kArchRet, s[1]->arch_opcode());
+  EXPECT_EQ(1U, s[1]->InputCount());
+}
+
+
 TARGET_TEST_F(InstructionSelectorTest, ReturnParameter) {
   StreamBuilder m(this, kMachInt32, kMachInt32);
   m.Return(m.Parameter(0));
   Stream s = m.Build(kAllInstructions);
   ASSERT_EQ(2U, s.size());
   EXPECT_EQ(kArchNop, s[0]->arch_opcode());
   ASSERT_EQ(1U, s[0]->OutputCount());
   EXPECT_EQ(kArchRet, s[1]->arch_opcode());
   EXPECT_EQ(1U, s[1]->InputCount());
 }
@@ skipping 155 matching lines @@
     const Instruction* i2 = s2[i];
     EXPECT_EQ(i1->arch_opcode(), i2->arch_opcode());
     EXPECT_EQ(i1->InputCount(), i2->InputCount());
     EXPECT_EQ(i1->OutputCount(), i2->OutputCount());
   }
 }
 
 
 // -----------------------------------------------------------------------------
 // Calls with deoptimization.
+
+
 TARGET_TEST_F(InstructionSelectorTest, CallJSFunctionWithDeopt) {
   StreamBuilder m(this, kMachAnyTagged, kMachAnyTagged, kMachAnyTagged,
                   kMachAnyTagged);
 
   BailoutId bailout_id(42);
 
   Node* function_node = m.Parameter(0);
   Node* receiver = m.Parameter(1);
   Node* context = m.Parameter(2);
 
@@ skipping 186 matching lines @@
   EXPECT_EQ(context2->id(), s.ToVreg(call_instr->InputAt(11)));
   // Continuation.
 
   EXPECT_EQ(kArchRet, s[index++]->arch_opcode());
   EXPECT_EQ(index, s.size());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8