[turbofan] Add operators for float32 support.

src/compiler/graph-unittest.cc

Index: src/compiler/graph-unittest.cc
diff --git a/src/compiler/graph-unittest.cc b/src/compiler/graph-unittest.cc
index f7faa6de29da447790f61dda238ffb0b688a1e8d..58adb112c731600fd9b29aa93d2540a3ab8f4b0b 100644
--- a/src/compiler/graph-unittest.cc
+++ b/src/compiler/graph-unittest.cc
@@ -44,7 +44,12 @@ Node* GraphTest::Parameter(int32_t index) {
 }
 
 
-Node* GraphTest::Float64Constant(double value) {
+Node* GraphTest::Float32Constant(volatile float value) {
+  return graph()->NewNode(common()->Float32Constant(value));
+}
+
+
+Node* GraphTest::Float64Constant(volatile double value) {
   return graph()->NewNode(common()->Float64Constant(value));
 }
 
@@ -59,7 +64,7 @@ Node* GraphTest::Int64Constant(int64_t value) {
 }
 
 
-Node* GraphTest::NumberConstant(double value) {
+Node* GraphTest::NumberConstant(volatile double value) {
   return graph()->NewNode(common()->NumberConstant(value));
 }
 
@@ -664,6 +669,12 @@ Matcher<Node*> IsInt64Constant(const Matcher<int64_t>& value_matcher) {
 }
 
 
+Matcher<Node*> IsFloat32Constant(const Matcher<float>& value_matcher) {
+  return MakeMatcher(
+      new IsConstantMatcher<float>(IrOpcode::kFloat32Constant, value_matcher));
+}
+
+
 Matcher<Node*> IsFloat64Constant(const Matcher<double>& value_matcher) {
   return MakeMatcher(
       new IsConstantMatcher<double>(IrOpcode::kFloat64Constant, value_matcher));