[turbofan] Fixed a bug in TryTruncateFloatXXToInt64 with INT64_MIN.

test/cctest/compiler/test-run-machops.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 <cmath>
 #include <functional>
 #include <limits>
 
 #include "src/base/bits.h"
 #include "src/base/utils/random-number-generator.h"
@@ skipping 5464 matching lines @@
 TEST(RunTryTruncateFloat32ToInt64WithCheck) {
   int64_t success = 0;
   BufferedRawMachineAssemblerTester<int64_t> m(MachineType::Float32());
   Node* trunc = m.TryTruncateFloat32ToInt64(m.Parameter(0));
   Node* val = m.Projection(0, trunc);
   Node* check = m.Projection(1, trunc);
   m.StoreToPointer(&success, MachineRepresentation::kWord64, check);
   m.Return(val);
 
   FOR_FLOAT32_INPUTS(i) {
-    if (*i < 9223372036854775808.0 && *i > -9223372036854775809.0) {
+    if (*i < 9223372036854775808.0 && *i >= -9223372036854775808.0) {
       CHECK_EQ(static_cast<int64_t>(*i), m.Call(*i));
       CHECK_NE(0, success);
     } else {
       m.Call(*i);
       CHECK_EQ(0, success);
     }
   }
 }
 
 
@@ skipping 11 matching lines @@
 TEST(RunTryTruncateFloat64ToInt64WithCheck) {
   int64_t success = 0;
   BufferedRawMachineAssemblerTester<int64_t> m(MachineType::Float64());
   Node* trunc = m.TryTruncateFloat64ToInt64(m.Parameter(0));
   Node* val = m.Projection(0, trunc);
   Node* check = m.Projection(1, trunc);
   m.StoreToPointer(&success, MachineRepresentation::kWord64, check);
   m.Return(val);
 
   FOR_FLOAT64_INPUTS(i) {
-    if (*i < 9223372036854775808.0 && *i > -9223372036854775809.0) {
+    if (*i < 9223372036854775808.0 && *i >= -9223372036854775808.0) {
       // Conversions within this range should succeed.
       CHECK_EQ(static_cast<int64_t>(*i), m.Call(*i));
       CHECK_NE(0, success);
     } else {
       m.Call(*i);
       CHECK_EQ(0, success);
     }
   }
 }
 
@@ skipping 346 matching lines @@
   Node* call = r.AddNode(r.common()->Call(desc), phi);
   r.Return(call);
 
   CHECK_EQ(33, r.Call(1));
   CHECK_EQ(44, r.Call(0));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8