[turbofan] Change TruncateFloat32ToInt64 to TryTruncateFloat32ToInt64.

src/compiler/arm64/code-generator-arm64.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 "src/compiler/code-generator.h"
 
 #include "src/arm64/frames-arm64.h"
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 1019 matching lines @@
       __ Fcvt(i.OutputDoubleRegister().S(), i.InputDoubleRegister(0));
       break;
     case kArm64Float64ToInt32:
       __ Fcvtzs(i.OutputRegister32(), i.InputDoubleRegister(0));
       break;
     case kArm64Float64ToUint32:
       __ Fcvtzu(i.OutputRegister32(), i.InputDoubleRegister(0));
       break;
     case kArm64Float32ToInt64:
       __ Fcvtzs(i.OutputRegister64(), i.InputFloat32Register(0));
+      if (i.OutputCount() > 1) {
+        __ Cmp(i.OutputRegister(0), 1);
+        __ Ccmp(i.OutputRegister(0), -1, VFlag, vc);
+        __ Fccmp(i.InputDoubleRegister(0), i.InputDoubleRegister(0), VFlag, vc);

[jbramley, 2015/12/08 13:53:08]

InputFloat32Register, surely.

[ahaas, 2015/12/09 11:15:01]

Done.

+        __ Cset(i.OutputRegister(1), vc);
+      }
       break;
     case kArm64Float64ToInt64:
       __ Fcvtzs(i.OutputRegister(0), i.InputDoubleRegister(0));
       if (i.OutputCount() > 1) {
         __ Cmp(i.OutputRegister(0), 1);
         __ Ccmp(i.OutputRegister(0), -1, VFlag, vc);
         __ Fccmp(i.InputDoubleRegister(0), i.InputDoubleRegister(0), VFlag, vc);
         __ Cset(i.OutputRegister(1), vc);
       }
       break;
@@ skipping 551 matching lines @@
       padding_size -= kInstructionSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8