Experimental implementation: Exposing SIMD instructions into JavaScript

src/hydrogen-representation-changes.cc

Index: src/hydrogen-representation-changes.cc
diff --git a/src/hydrogen-representation-changes.cc b/src/hydrogen-representation-changes.cc
index 07fc8be38c0437951b05ea4210db9e5b196f1d0a..95a1515a6f2a5ac82054113264284e77ea90544e 100644
--- a/src/hydrogen-representation-changes.cc
+++ b/src/hydrogen-representation-changes.cc
@@ -59,8 +59,18 @@ void HRepresentationChangesPhase::InsertRepresentationChangeForUse(
   }
 
   if (new_value == NULL) {
-    new_value = new(graph()->zone()) HChange(
-        value, to, is_truncating_to_smi, is_truncating_to_int);
+    if (((to.IsFloat32x4() || to.IsInt32x4()) &&
+         !value->representation().IsTagged()) ||
+        ((value->representation().IsFloat32x4() ||
+          value->representation().IsInt32x4()) &&
+         !to.IsTagged())) {
+      new_value = HUnarySIMDOperation::New(graph()->zone(),
+          graph()->entry_block()->last_environment()->context(),
+          value, kFloat32x4OrInt32x4Change, to);
+    } else {
+      new_value = new(graph()->zone()) HChange(
+          value, to, is_truncating_to_smi, is_truncating_to_int);
+    }
     if (use_value->operand_position(use_index) != RelocInfo::kNoPosition) {
       new_value->set_position(use_value->operand_position(use_index));
     } else {