Re-assign registers on ARM so PP and CODE_REG are below R7 (FP on iOS).

runtime/vm/intermediate_language_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/cpu.h"
@@ skipping 209 matching lines @@
                                                  argument_names()));
   __ LoadObject(R4, arguments_descriptor);
 
   // R4: Arguments descriptor.
   // R0: Function.
   ASSERT(locs()->in(0).reg() == R0);
   __ ldr(CODE_REG, FieldAddress(R0, Function::code_offset()));
   __ ldr(R2, FieldAddress(R0, Function::entry_point_offset()));
 
   // R2: instructions entry point.
-  // R5: Smi 0 (no IC data; the lazy-compile stub expects a GC-safe value).
-  __ LoadImmediate(R5, 0);
+  // R9: Smi 0 (no IC data; the lazy-compile stub expects a GC-safe value).
+  __ LoadImmediate(R9, 0);
   __ blx(R2);
   compiler->RecordSafepoint(locs());
   // Marks either the continuation point in unoptimized code or the
   // deoptimization point in optimized code, after call.
   const intptr_t deopt_id_after = Thread::ToDeoptAfter(deopt_id());
   if (compiler->is_optimizing()) {
     compiler->AddDeoptIndexAtCall(deopt_id_after, token_pos());
   }
   // Add deoptimization continuation point after the call and before the
   // arguments are removed.
@@ skipping 721 matching lines @@
 #if defined(USING_SIMULATOR)
       if (!function().IsNativeAutoSetupScope()) {
         entry = Simulator::RedirectExternalReference(
             entry, Simulator::kBootstrapNativeCall, NativeEntry::kNumArguments);
       }
 #endif
     }
   }
   __ LoadImmediate(R1, argc_tag);
   ExternalLabel label(entry);
-  __ LoadNativeEntry(R5, &label, link_lazily() ? kPatchable : kNotPatchable);
+  __ LoadNativeEntry(R9, &label, link_lazily() ? kPatchable : kNotPatchable);
   compiler->GenerateCall(token_pos(),
                          *stub_entry,
                          RawPcDescriptors::kOther,
                          locs());
   __ Pop(result);
 }
 
 
 LocationSummary* StringFromCharCodeInstr::MakeLocationSummary(Zone* zone,
                                                               bool opt) const {
@@ skipping 1334 matching lines @@
                                    Label* slow_path,
                                    Label* done) {
   const int kInlineArraySize = 12;  // Same as kInlineInstanceSize.
   const Register kLengthReg = R2;
   const Register kElemTypeReg = R1;
   const intptr_t instance_size = Array::InstanceSize(num_elements);
 
   __ TryAllocateArray(kArrayCid, instance_size, slow_path,
                       R0,  // instance
                       R3,  // end address
-                      R6,
-                      R10);
+                      R8,
+                      R6);
   // R0: new object start as a tagged pointer.
   // R3: new object end address.
 
   // Store the type argument field.
   __ InitializeFieldNoBarrier(R0,
                               FieldAddress(R0, Array::type_arguments_offset()),
                               kElemTypeReg);
 
   // Set the length field.
   __ InitializeFieldNoBarrier(R0,
                               FieldAddress(R0, Array::length_offset()),
                               kLengthReg);
 
   // Initialize all array elements to raw_null.
   // R0: new object start as a tagged pointer.
   // R3: new object end address.
-  // R10: iterator which initially points to the start of the variable
+  // R6: iterator which initially points to the start of the variable
   // data area to be initialized.
-  // R6: null
+  // R8: null
   if (num_elements > 0) {
     const intptr_t array_size = instance_size - sizeof(RawArray);
-    __ LoadObject(R6, Object::null_object());
+    __ LoadObject(R8, Object::null_object());
     if (num_elements >= 2) {
-      __ mov(R7, Operand(R6));
+      __ mov(R9, Operand(R8));
     } else {
 #if defined(DEBUG)
       // Clobber R7 with an invalid pointer.
-      __ LoadImmediate(R7, 0x1);
+      __ LoadImmediate(R9, 0x1);
 #endif  // DEBUG
     }
-    __ AddImmediate(R10, R0, sizeof(RawArray) - kHeapObjectTag);
+    __ AddImmediate(R6, R0, sizeof(RawArray) - kHeapObjectTag);
     if (array_size < (kInlineArraySize * kWordSize)) {
-      __ InitializeFieldsNoBarrierUnrolled(R0, R10, 0, num_elements * kWordSize,
-                                           R6, R7);
+      __ InitializeFieldsNoBarrierUnrolled(R0, R6, 0, num_elements * kWordSize,
+                                           R8, R9);
     } else {
-      __ InitializeFieldsNoBarrier(R0, R10, R3, R6, R7);
+      __ InitializeFieldsNoBarrier(R0, R6, R3, R8, R9);
     }
   }
   __ b(done);
 }
 
 
 void CreateArrayInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   const Register kLengthReg = R2;
   const Register kElemTypeReg = R1;
   const Register kResultReg = R0;
@@ skipping 4484 matching lines @@
                                 1,
                                 locs());
   __ Drop(1);
   __ Pop(result);
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM