Update V8 to r7427: Initial merge by git

As required by WebKit r82507

Change-Id: I7ae83ef3f689356043b4929255b7c1dd31d8c5df

1 files changed, 101 insertions, 33 deletions

diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 4440cdfa..199a80ae 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1366,13 +1366,23 @@ LInstruction* LChunkBuilder::DoMod(HMod* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
-    // The temporary operand is necessary to ensure that right is not allocated
-    // into edx.
-    LOperand* temp = FixedTemp(edx);
-    LOperand* value = UseFixed(instr->left(), eax);
-    LOperand* divisor = UseRegister(instr->right());
-    LModI* mod = new LModI(value, divisor, temp);
-    LInstruction* result = DefineFixed(mod, edx);
+
+    LInstruction* result;
+    if (instr->HasPowerOf2Divisor()) {
+      ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
+      LOperand* value = UseRegisterAtStart(instr->left());
+      LModI* mod = new LModI(value, UseOrConstant(instr->right()), NULL);
+      result = DefineSameAsFirst(mod);
+    } else {
+      // The temporary operand is necessary to ensure that right is
+      // not allocated into edx.
+      LOperand* temp = FixedTemp(edx);
+      LOperand* value = UseFixed(instr->left(), eax);
+      LOperand* divisor = UseRegister(instr->right());
+      LModI* mod = new LModI(value, divisor, temp);
+      result = DefineFixed(mod, edx);
+    }
+
     return (instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
             instr->CheckFlag(HValue::kCanBeDivByZero))
         ? AssignEnvironment(result)
@@ -1577,9 +1587,10 @@ LInstruction* LChunkBuilder::DoFixedArrayLength(HFixedArrayLength* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoPixelArrayLength(HPixelArrayLength* instr) {
+LInstruction* LChunkBuilder::DoExternalArrayLength(
+    HExternalArrayLength* instr) {
   LOperand* array = UseRegisterAtStart(instr->value());
-  return DefineAsRegister(new LPixelArrayLength(array));
+  return DefineAsRegister(new LExternalArrayLength(array));
 }
 
 
@@ -1622,8 +1633,9 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
       LOperand* value = UseRegister(instr->value());
       bool needs_check = !instr->value()->type().IsSmi();
       if (needs_check) {
+        CpuFeatures* cpu_features = Isolate::Current()->cpu_features();
         LOperand* xmm_temp =
-            (instr->CanTruncateToInt32() && CpuFeatures::IsSupported(SSE3))
+            (instr->CanTruncateToInt32() && cpu_features->IsSupported(SSE3))
             ? NULL
             : FixedTemp(xmm1);
         LTaggedToI* res = new LTaggedToI(value, xmm_temp);
@@ -1644,7 +1656,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
     } else {
       ASSERT(to.IsInteger32());
       bool needs_temp = instr->CanTruncateToInt32() &&
-          !CpuFeatures::IsSupported(SSE3);
+          !Isolate::Current()->cpu_features()->IsSupported(SSE3);
       LOperand* value = needs_temp ?
           UseTempRegister(instr->value()) : UseRegister(instr->value());
       LOperand* temp = needs_temp ? TempRegister() : NULL;
@@ -1672,7 +1684,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
 
 LInstruction* LChunkBuilder::DoCheckNonSmi(HCheckNonSmi* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  return AssignEnvironment(new LCheckSmi(value, zero));
+  return AssignEnvironment(new LCheckNonSmi(value));
 }
 
 
@@ -1693,7 +1705,7 @@ LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
 
 LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  return AssignEnvironment(new LCheckSmi(value, not_zero));
+  return AssignEnvironment(new LCheckSmi(value));
 }
 
 
@@ -1778,6 +1790,21 @@ LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoLoadNamedFieldPolymorphic(
+    HLoadNamedFieldPolymorphic* instr) {
+  ASSERT(instr->representation().IsTagged());
+  if (instr->need_generic()) {
+    LOperand* obj = UseFixed(instr->object(), eax);
+    LLoadNamedFieldPolymorphic* result = new LLoadNamedFieldPolymorphic(obj);
+    return MarkAsCall(DefineFixed(result, eax), instr);
+  } else {
+    LOperand* obj = UseRegisterAtStart(instr->object());
+    LLoadNamedFieldPolymorphic* result = new LLoadNamedFieldPolymorphic(obj);
+    return AssignEnvironment(DefineAsRegister(result));
+  }
+}
+
+
 LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* object = UseFixed(instr->object(), eax);
@@ -1800,10 +1827,10 @@ LInstruction* LChunkBuilder::DoLoadElements(HLoadElements* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoLoadPixelArrayExternalPointer(
-    HLoadPixelArrayExternalPointer* instr) {
+LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
+    HLoadExternalArrayPointer* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
-  return DefineAsRegister(new LLoadPixelArrayExternalPointer(input));
+  return DefineAsRegister(new LLoadExternalArrayPointer(input));
 }
 
 
@@ -1818,16 +1845,24 @@ LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
 }
 
 
-LInstruction* LChunkBuilder::DoLoadPixelArrayElement(
-    HLoadPixelArrayElement* instr) {
-  ASSERT(instr->representation().IsInteger32());
+LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
+    HLoadKeyedSpecializedArrayElement* instr) {
+  ExternalArrayType array_type = instr->array_type();
+  Representation representation(instr->representation());
+  ASSERT((representation.IsInteger32() && array_type != kExternalFloatArray) ||
+         (representation.IsDouble() && array_type == kExternalFloatArray));
   ASSERT(instr->key()->representation().IsInteger32());
-  LOperand* external_pointer =
-      UseRegisterAtStart(instr->external_pointer());
-  LOperand* key = UseRegisterAtStart(instr->key());
-  LLoadPixelArrayElement* result =
-      new LLoadPixelArrayElement(external_pointer, key);
-  return DefineSameAsFirst(result);
+  LOperand* external_pointer = UseRegister(instr->external_pointer());
+  LOperand* key = UseRegister(instr->key());
+  LLoadKeyedSpecializedArrayElement* result =
+      new LLoadKeyedSpecializedArrayElement(external_pointer,
+                                            key);
+  LInstruction* load_instr = DefineAsRegister(result);
+  // An unsigned int array load might overflow and cause a deopt, make sure it
+  // has an environment.
+  return (array_type == kExternalUnsignedIntArray)
+      ? AssignEnvironment(load_instr)
+      : load_instr;
 }
 
 
@@ -1860,20 +1895,39 @@ LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
 }
 
 
-LInstruction* LChunkBuilder::DoStorePixelArrayElement(
-    HStorePixelArrayElement* instr) {
-  ASSERT(instr->value()->representation().IsInteger32());
+LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
+    HStoreKeyedSpecializedArrayElement* instr) {
+  Representation representation(instr->value()->representation());
+  ExternalArrayType array_type = instr->array_type();
+  ASSERT((representation.IsInteger32() && array_type != kExternalFloatArray) ||
+         (representation.IsDouble() && array_type == kExternalFloatArray));
   ASSERT(instr->external_pointer()->representation().IsExternal());
   ASSERT(instr->key()->representation().IsInteger32());
 
   LOperand* external_pointer = UseRegister(instr->external_pointer());
-  LOperand* val = UseRegister(instr->value());
   LOperand* key = UseRegister(instr->key());
-  // The generated code requires that the clamped value is in a byte
-  // register. eax is an arbitrary choice to satisfy this requirement.
-  LOperand* clamped = FixedTemp(eax);
+  LOperand* temp = NULL;
+
+  if (array_type == kExternalPixelArray) {
+    // The generated code for pixel array stores requires that the clamped value
+    // is in a byte register. eax is an arbitrary choice to satisfy this
+    // requirement.
+    temp = FixedTemp(eax);
+  }
+
+  LOperand* val = NULL;
+  if (array_type == kExternalByteArray ||
+      array_type == kExternalUnsignedByteArray) {
+    // We need a byte register in this case for the value.
+    val = UseFixed(instr->value(), eax);
+  } else {
+    val = UseRegister(instr->value());
+  }
 
-  return new LStorePixelArrayElement(external_pointer, key, val, clamped);
+  return new LStoreKeyedSpecializedArrayElement(external_pointer,
+                                                key,
+                                                val,
+                                                temp);
 }
 
 
@@ -1932,6 +1986,13 @@ LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
+  LOperand* char_code = UseRegister(instr->value());
+  LStringCharFromCode* result = new LStringCharFromCode(char_code);
+  return AssignPointerMap(DefineAsRegister(result));
+}
+
+
 LInstruction* LChunkBuilder::DoStringLength(HStringLength* instr) {
   LOperand* string = UseRegisterAtStart(instr->value());
   return DefineAsRegister(new LStringLength(string));
@@ -2011,6 +2072,13 @@ LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoToFastProperties(HToFastProperties* instr) {
+  LOperand* object = UseFixed(instr->value(), eax);
+  LToFastProperties* result = new LToFastProperties(object);
+  return MarkAsCall(DefineFixed(result, eax), instr);
+}
+
+
 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
   LTypeof* result = new LTypeof(UseAtStart(instr->value()));
   return MarkAsCall(DefineFixed(result, eax), instr);