[turbofan] Add operators for float32 support.

src/compiler/graph-unittest.h

Index: src/compiler/graph-unittest.h
diff --git a/src/compiler/graph-unittest.h b/src/compiler/graph-unittest.h
index 42e4dd9bdc5eb18f0ca397004dc70ccfe2165fbb..3cda9b7b190a32ce1767dfae596ac97f937d6fa8 100644
--- a/src/compiler/graph-unittest.h
+++ b/src/compiler/graph-unittest.h
@@ -31,10 +31,11 @@ class GraphTest : public TestWithContext, public TestWithZone {
 
  protected:
   Node* Parameter(int32_t index);
-  Node* Float64Constant(double value);
+  Node* Float32Constant(volatile float value);
+  Node* Float64Constant(volatile double value);
   Node* Int32Constant(int32_t value);
   Node* Int64Constant(int64_t value);
-  Node* NumberConstant(double value);
+  Node* NumberConstant(volatile double value);
   Node* HeapConstant(const Unique<HeapObject>& value);
   Node* FalseConstant();
   Node* TrueConstant();
@@ -65,6 +66,7 @@ Matcher<Node*> IsExternalConstant(
     const Matcher<ExternalReference>& value_matcher);
 Matcher<Node*> IsHeapConstant(
     const Matcher<Unique<HeapObject> >& value_matcher);
+Matcher<Node*> IsFloat32Constant(const Matcher<float>& value_matcher);
 Matcher<Node*> IsFloat64Constant(const Matcher<double>& value_matcher);
 Matcher<Node*> IsInt32Constant(const Matcher<int32_t>& value_matcher);
 Matcher<Node*> IsInt64Constant(const Matcher<int64_t>& value_matcher);