Implement crankshaft support for pixel array loads.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index b31c4eba184b691354b8d5efc6d77305d79bd533..fac95bada37d2e4049ca86043d695751bb02bced 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1537,6 +1537,12 @@ LInstruction* LChunkBuilder::DoFixedArrayLength(HFixedArrayLength* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoPixelArrayLength(HPixelArrayLength* instr) {
+  LOperand* array = UseRegisterAtStart(instr->value());
+  return DefineAsRegister(new LPixelArrayLength(array));
+}
+
+
 LInstruction* LChunkBuilder::DoValueOf(HValueOf* instr) {
   LOperand* object = UseRegister(instr->value());
   LValueOf* result = new LValueOf(object, TempRegister());
@@ -1747,7 +1753,14 @@ LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
 
 LInstruction* LChunkBuilder::DoLoadElements(HLoadElements* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
-  return DefineSameAsFirst(new LLoadElements(input));
+  return DefineAsRegister(new LLoadElements(input));
+}
+
+
+LInstruction* LChunkBuilder::DoLoadPixelArrayExternalPointer(
+    HLoadPixelArrayExternalPointer* instr) {
+  LOperand* input = UseRegisterAtStart(instr->value());
+  return DefineAsRegister(new LLoadPixelArrayExternalPointer(input));
 }
 
 
@@ -1762,6 +1775,19 @@ LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
 }
 
 
+LInstruction* LChunkBuilder::DoLoadPixelArrayElement(
+    HLoadPixelArrayElement* instr) {
+  ASSERT(instr->representation().IsInteger32());
+  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);
+}
+
+
 LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
   LOperand* object = UseFixed(instr->object(), edx);
   LOperand* key = UseFixed(instr->key(), eax);