[turbofan] Remove bogus constant materialization from frame.

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/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 1918 matching lines @@
     }
   } else if (source->IsConstant()) {
     Constant src = g.ToConstant(ConstantOperand::cast(source));
     if (destination->IsRegister() || destination->IsStackSlot()) {
       UseScratchRegisterScope scope(masm());
       Register dst = destination->IsRegister() ? g.ToRegister(destination)
                                                : scope.AcquireX();
       if (src.type() == Constant::kHeapObject) {
         Handle<HeapObject> src_object = src.ToHeapObject();
         Heap::RootListIndex index;
-        int slot;
-        if (IsMaterializableFromFrame(src_object, &slot)) {
-          __ Ldr(dst, g.SlotToMemOperand(slot, masm()));
-        } else if (IsMaterializableFromRoot(src_object, &index)) {
+        if (IsMaterializableFromRoot(src_object, &index)) {
           __ LoadRoot(dst, index);
         } else {
           __ LoadObject(dst, src_object);
         }
       } else {
         __ Mov(dst, g.ToImmediate(source));
       }
       if (destination->IsStackSlot()) {
         __ Str(dst, g.ToMemOperand(destination, masm()));
       }
@@ skipping 137 matching lines @@
       padding_size -= kInstructionSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8