PPC: Debugger: use debug break slots instead of ICs (except for calls).

Port a8a4c364

R=yangguo@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1216863005

Cr-Commit-Position: refs/heads/master@{#29503}

src/ppc/debug-ppc.cc

@@ -157,50 +157,6 @@ void DebugCodegen::GenerateCallICStubDebugBreak(MacroAssembler* masm) {
 }
 
 
-void DebugCodegen::GenerateLoadICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for IC load (from ic-ppc.cc).
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  Register name = LoadDescriptor::NameRegister();
-  Register slot = LoadDescriptor::SlotRegister();
-  RegList regs = receiver.bit() | name.bit() | slot.bit();
-  Generate_DebugBreakCallHelper(masm, regs, 0);
-}
-
-
-void DebugCodegen::GenerateStoreICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for IC store (from ic-ppc.cc).
-  Register receiver = StoreDescriptor::ReceiverRegister();
-  Register name = StoreDescriptor::NameRegister();
-  Register value = StoreDescriptor::ValueRegister();
-  RegList regs = receiver.bit() | name.bit() | value.bit();
-  if (FLAG_vector_stores) {
-    regs |= VectorStoreICDescriptor::SlotRegister().bit();
-  }
-  Generate_DebugBreakCallHelper(masm, regs, 0);
-}
-
-
-void DebugCodegen::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for keyed IC load (from ic-ppc.cc).
-  GenerateLoadICDebugBreak(masm);
-}
-
-
-void DebugCodegen::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for IC keyed store call (from ic-ppc.cc).
-  GenerateStoreICDebugBreak(masm);
-}
-
-
-void DebugCodegen::GenerateCompareNilICDebugBreak(MacroAssembler* masm) {
-  // Register state for CompareNil IC
-  // ----------- S t a t e -------------
-  //  -- r3    : value
-  // -----------------------------------
-  Generate_DebugBreakCallHelper(masm, r3.bit(), 0);
-}
-
-
 void DebugCodegen::GenerateReturnDebugBreak(MacroAssembler* masm) {
   // In places other than IC call sites it is expected that r3 is TOS which
   // is an object - this is not generally the case so this should be used with