[ic] Fixed receiver_map register trashing in KeyedStoreIC megamorphic.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 92a2419d30ae88ba45e1ff7e5c2dd45864c914b9..b7c5bab5feb4add9cdd6c781e152f9474485159e 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -3714,6 +3714,8 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
                                                  Register scratch3,
                                                  Label* fail,
                                                  int elements_offset) {
+  DCHECK(!AreAliased(value_reg, key_reg, elements_reg, scratch1, scratch2,
+                     scratch3));
   Label smi_value, maybe_nan, have_double_value, is_nan, done;
   Register mantissa_reg = scratch2;
   Register exponent_reg = scratch3;
@@ -3768,7 +3770,7 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
   Addu(scratch1, scratch1, scratch2);
   // scratch1 is now effective address of the double element
 
-  Register untagged_value = elements_reg;
+  Register untagged_value = scratch2;
   SmiUntag(untagged_value, value_reg);
   mtc1(untagged_value, f2);
   cvt_d_w(f0, f2);
@@ -5774,17 +5776,13 @@ void MacroAssembler::JumpIfDictionaryInPrototypeChain(
 }
 
 
-bool AreAliased(Register reg1,
-                Register reg2,
-                Register reg3,
-                Register reg4,
-                Register reg5,
-                Register reg6,
-                Register reg7,
-                Register reg8) {
-  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();
+bool AreAliased(Register reg1, Register reg2, Register reg3, Register reg4,
+                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() + reg9.is_valid() +
+                        reg10.is_valid();
 
   RegList regs = 0;
   if (reg1.is_valid()) regs |= reg1.bit();
@@ -5795,6 +5793,8 @@ bool AreAliased(Register reg1,
   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;