[turbofan] Change TruncateFloat32ToUint64 to TryTruncateFloat32ToUint64.

test/cctest/compiler/test-representation-change.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 <limits>
 
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/codegen-tester.h"
 #include "test/cctest/compiler/graph-builder-tester.h"
 #include "test/cctest/compiler/value-helper.h"
@@ skipping 43 matching lines @@
 
   void CheckFloat64Constant(Node* n, double expected) {
     Float64Matcher m(n);
     CHECK(m.HasValue());
     CheckDoubleEq(expected, m.Value());
   }
 
   void CheckFloat32Constant(Node* n, float expected) {
     CHECK_EQ(IrOpcode::kFloat32Constant, n->opcode());
     float fval = OpParameter<float>(n->op());
-    CHECK_EQ(expected, fval);
+    CheckDoubleEq(expected, fval);
   }
 
   void CheckHeapConstant(Node* n, HeapObject* expected) {
     HeapObjectMatcher m(n);
     CHECK(m.HasValue());
     CHECK_EQ(expected, *m.Value());
   }
 
   void CheckNumberConstant(Node* n, double expected) {
     NumberMatcher m(n);
@@ skipping 502 matching lines @@
   // Word64 / Word32 shouldn't be implicitly converted.
   r.CheckTypeError(MachineType::RepWord64(), MachineRepresentation::kWord32);
   r.CheckTypeError(MachineType::RepWord32(), MachineRepresentation::kWord64);
   r.CheckTypeError(MachineType::Int32(), MachineRepresentation::kWord64);
   r.CheckTypeError(MachineType::Uint32(), MachineRepresentation::kWord64);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8