[ic] Fixed receiver_map register trashing in KeyedStoreIC megamorphic.

src/ppc/macro-assembler-ppc.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 <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
@@ skipping 1817 matching lines @@
   lbz(scratch, FieldMemOperand(map, Map::kBitField2Offset));
   cmpli(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue));
   bgt(fail);
 }
 
 
 void MacroAssembler::StoreNumberToDoubleElements(
     Register value_reg, Register key_reg, Register elements_reg,
     Register scratch1, DoubleRegister double_scratch, Label* fail,
     int elements_offset) {
+  DCHECK(!AreAliased(value_reg, key_reg, elements_reg, scratch1));
   Label smi_value, store;
 
   // Handle smi values specially.
   JumpIfSmi(value_reg, &smi_value);
 
   // Ensure that the object is a heap number
   CheckMap(value_reg, scratch1, isolate()->factory()->heap_number_map(), fail,
            DONT_DO_SMI_CHECK);
 
   lfd(double_scratch, FieldMemOperand(value_reg, HeapNumber::kValueOffset));
@@ skipping 2466 matching lines @@
   LoadP(current, FieldMemOperand(current, Map::kPrototypeOffset));
   CompareRoot(current, Heap::kNullValueRootIndex);
   bne(&loop_again);
 
   bind(&end);
 }
 
 
 #ifdef DEBUG
 bool AreAliased(Register reg1, Register reg2, Register reg3, Register reg4,
-                Register reg5, Register reg6, Register reg7, Register reg8) {
+                Register reg5, Register reg6, Register reg7, Register reg8,
+                Register reg9, Register reg10) {
   int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() + reg3.is_valid() +
                         reg4.is_valid() + reg5.is_valid() + reg6.is_valid() +
-                        reg7.is_valid() + reg8.is_valid();
+                        reg7.is_valid() + reg8.is_valid() + reg9.is_valid() +
+                        reg10.is_valid();
 
   RegList regs = 0;
   if (reg1.is_valid()) regs |= reg1.bit();
   if (reg2.is_valid()) regs |= reg2.bit();
   if (reg3.is_valid()) regs |= reg3.bit();
   if (reg4.is_valid()) regs |= reg4.bit();
   if (reg5.is_valid()) regs |= reg5.bit();
   if (reg6.is_valid()) regs |= reg6.bit();
   if (reg7.is_valid()) regs |= reg7.bit();
   if (reg8.is_valid()) regs |= reg8.bit();
+  if (reg9.is_valid()) regs |= reg9.bit();
+  if (reg10.is_valid()) regs |= reg10.bit();
   int n_of_non_aliasing_regs = NumRegs(regs);
 
   return n_of_valid_regs != n_of_non_aliasing_regs;
 }
 #endif
 
 
 CodePatcher::CodePatcher(Isolate* isolate, byte* address, int instructions,
                          FlushICache flush_cache)
     : address_(address),
@@ skipping 56 matching lines @@
   }
   if (mag.shift > 0) srawi(result, result, mag.shift);
   ExtractBit(r0, dividend, 31);
   add(result, result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC