[turbofan] Add backend support for float32.

src/compiler/ia32/instruction-selector-ia32-unittest.cc

Index: src/compiler/ia32/instruction-selector-ia32-unittest.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32-unittest.cc b/src/compiler/ia32/instruction-selector-ia32-unittest.cc
index 60708c1ebe64abff032339100eccd00d49d7e6ee..447f562622d0d2f88e07494ccf6ff92f2cbb84aa 100644
--- a/src/compiler/ia32/instruction-selector-ia32-unittest.cc
+++ b/src/compiler/ia32/instruction-selector-ia32-unittest.cc
@@ -75,6 +75,32 @@ TEST_F(InstructionSelectorTest, Int32SubWithImmediate) {
 
 
 // -----------------------------------------------------------------------------
+// Conversions.
+
+
+TEST_F(InstructionSelectorTest, ChangeFloat32ToFloat64WithParameter) {
+  StreamBuilder m(this, kMachFloat32, kMachFloat64);
+  m.Return(m.ChangeFloat32ToFloat64(m.Parameter(0)));
+  Stream s = m.Build();
+  ASSERT_EQ(1U, s.size());
+  EXPECT_EQ(kSSECvtss2sd, s[0]->arch_opcode());
+  EXPECT_EQ(1U, s[0]->InputCount());
+  EXPECT_EQ(1U, s[0]->OutputCount());
+}
+
+
+TEST_F(InstructionSelectorTest, TruncateFloat64ToFloat32WithParameter) {
+  StreamBuilder m(this, kMachFloat64, kMachFloat32);
+  m.Return(m.TruncateFloat64ToFloat32(m.Parameter(0)));
+  Stream s = m.Build();
+  ASSERT_EQ(1U, s.size());
+  EXPECT_EQ(kSSECvtsd2ss, s[0]->arch_opcode());
+  EXPECT_EQ(1U, s[0]->InputCount());
+  EXPECT_EQ(1U, s[0]->OutputCount());
+}
+
+
+// -----------------------------------------------------------------------------
 // Loads and stores
 
 namespace {