Vector ICs: debugger should save registers for vector store ics.

src/mips64/debug-mips64.cc

Index: src/mips64/debug-mips64.cc
diff --git a/src/mips64/debug-mips64.cc b/src/mips64/debug-mips64.cc
index 402de78a993223be1bced88fb03d9a471a6be437..ae506e1dc95e84311557691b5c317d861e3e9cc0 100644
--- a/src/mips64/debug-mips64.cc
+++ b/src/mips64/debug-mips64.cc
@@ -166,8 +166,11 @@ void DebugCodegen::GenerateStoreICDebugBreak(MacroAssembler* masm) {
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
   Register value = StoreDescriptor::ValueRegister();
-  Generate_DebugBreakCallHelper(
-      masm, receiver.bit() | name.bit() | value.bit(), 0);
+  RegList regs = receiver.bit() | name.bit() | value.bit();
+  if (FLAG_vector_stores) {
+    regs |= VectorStoreICDescriptor::SlotRegister().bit();
+  }
+  Generate_DebugBreakCallHelper(masm, regs, 0);
 }
 
 
@@ -179,11 +182,7 @@ void DebugCodegen::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
 
 void DebugCodegen::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
   // Calling convention for IC keyed store call (from ic-mips64.cc).
-  Register receiver = StoreDescriptor::ReceiverRegister();
-  Register name = StoreDescriptor::NameRegister();
-  Register value = StoreDescriptor::ValueRegister();
-  Generate_DebugBreakCallHelper(
-      masm, receiver.bit() | name.bit() | value.bit(), 0);
+  GenerateStoreICDebugBreak(masm);
 }