Set a fixed scratch register for ARM code generation...

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
===================================================================
--- src/arm/lithium-arm.cc	(revision 6144)
+++ src/arm/lithium-arm.cc	(working copy)
@@ -1222,7 +1222,6 @@
       ASSERT(compare->value()->representation().IsTagged());
 
       return new LHasInstanceTypeAndBranch(UseRegisterAtStart(compare->value()),
-                                           TempRegister(),
                                            first_id,
                                            second_id);
     } else if (v->IsHasCachedArrayIndex()) {
@@ -1235,11 +1234,8 @@
       HIsNull* compare = HIsNull::cast(v);
       ASSERT(compare->value()->representation().IsTagged());
 
-      // We only need a temp register for non-strict compare.
-      LOperand* temp = compare->is_strict() ? NULL : TempRegister();
       return new LIsNullAndBranch(UseRegisterAtStart(compare->value()),
                                   compare->is_strict(),
-                                  temp,
                                   first_id,
                                   second_id);
     } else if (v->IsIsObject()) {
@@ -1850,8 +1846,7 @@
 LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
     HLoadFunctionPrototype* instr) {
   return AssignEnvironment(DefineAsRegister(
-      new LLoadFunctionPrototype(UseRegister(instr->function()),
-                                 TempRegister())));
+      new LLoadFunctionPrototype(UseRegister(instr->function()))));
 }