Fixed deopt reasons in TaggedToI.

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 4945 matching lines @@
     __ CompareRoot(input_reg, Heap::kTrueValueRootIndex);
     __ j(not_equal, &check_false, Label::kNear);
     __ Set(input_reg, 1);
     __ jmp(done);
 
     __ bind(&check_false);
     __ CompareRoot(input_reg, Heap::kFalseValueRootIndex);
     __ RecordComment("Deferred TaggedToI: cannot truncate");
     DeoptimizeIf(not_equal, instr->environment());
     __ Set(input_reg, 0);
-    __ jmp(done);
   } else {
-    Label bailout;
-    XMMRegister xmm_temp = ToDoubleRegister(instr->temp());
-    __ TaggedToI(input_reg, input_reg, xmm_temp,
-        instr->hydrogen()->GetMinusZeroMode(), &bailout, Label::kNear);
-
-    __ jmp(done);
-    __ bind(&bailout);
-    DeoptimizeIf(no_condition, instr->environment());
+    XMMRegister scratch = ToDoubleRegister(instr->temp());
+    DCHECK(!scratch.is(xmm0));
+    __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
+                   Heap::kHeapNumberMapRootIndex);
+    __ RecordComment("Deferred TaggedToI: not a heap number");
+    DeoptimizeIf(not_equal, instr->environment());
+    __ movsd(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
+    __ cvttsd2si(input_reg, xmm0);
+    __ Cvtlsi2sd(scratch, input_reg);
+    __ ucomisd(xmm0, scratch);
+    __ RecordComment("Deferred TaggedToI: lost precision");
+    DeoptimizeIf(not_equal, instr->environment());
+    __ RecordComment("Deferred TaggedToI: NaN");
+    DeoptimizeIf(parity_even, instr->environment());
+    if (instr->hydrogen()->GetMinusZeroMode() == FAIL_ON_MINUS_ZERO) {
+      __ testl(input_reg, input_reg);
+      __ j(not_zero, done);
+      __ movmskpd(input_reg, xmm0);
+      __ andl(input_reg, Immediate(1));
+      __ RecordComment("Deferred TaggedToI: minus zero");
+      DeoptimizeIf(not_zero, instr->environment());
+    }
   }
 }
 
 
 void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
   class DeferredTaggedToI FINAL : public LDeferredCode {
    public:
     DeferredTaggedToI(LCodeGen* codegen, LTaggedToI* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() OVERRIDE {
@@ skipping 890 matching lines @@
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64