PPC/s390: [debugger] remove debugger statement support from FCG/CS.

Port eef855a1

R=yangguo@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2672813002
Cr-Commit-Position: refs/heads/master@{#42898}

src/ppc/macro-assembler-ppc.cc

@@ -1566,15 +1566,6 @@ void MacroAssembler::IsObjectNameType(Register object, Register scratch,
 }
 
 
-void MacroAssembler::DebugBreak() {
-  li(r3, Operand::Zero());
-  mov(r4,
-      Operand(ExternalReference(Runtime::kHandleDebuggerStatement, isolate())));
-  CEntryStub ces(isolate(), 1);
-  DCHECK(AllowThisStubCall(&ces));
-  Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT);
-}
-
 void MacroAssembler::MaybeDropFrames() {
   // Check whether we need to drop frames to restart a function on the stack.
   ExternalReference restart_fp =

src/ppc/macro-assembler-ppc.h

@@ -635,13 +635,10 @@ class MacroAssembler : public Assembler {
 
   void IsObjectNameType(Register object, Register scratch, Label* fail);
 
-  // ---------------------------------------------------------------------------
-  // Debugger Support
-
   void DebugBreak();
+  // Frame restart support
   void MaybeDropFrames();
 
-  // ---------------------------------------------------------------------------
   // Exception handling
 
   // Push a new stack handler and link into stack handler chain.

src/s390/macro-assembler-s390.cc

@@ -1462,15 +1462,6 @@ void MacroAssembler::IsObjectNameType(Register object, Register scratch,
   bgt(fail);
 }
 
-void MacroAssembler::DebugBreak() {
-  LoadImmP(r2, Operand::Zero());
-  mov(r3,
-      Operand(ExternalReference(Runtime::kHandleDebuggerStatement, isolate())));
-  CEntryStub ces(isolate(), 1);
-  DCHECK(AllowThisStubCall(&ces));
-  Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT);
-}
-
 void MacroAssembler::MaybeDropFrames() {
   // Check whether we need to drop frames to restart a function on the stack.
   ExternalReference restart_fp =

src/s390/macro-assembler-s390.h

@@ -946,13 +946,9 @@ class MacroAssembler : public Assembler {
 
   void IsObjectNameType(Register object, Register scratch, Label* fail);
 
-  // ---------------------------------------------------------------------------
-  // Debugger Support
-
-  void DebugBreak();
+  // Frame restart support
   void MaybeDropFrames();
 
-  // ---------------------------------------------------------------------------
   // Exception handling
 
   // Push a new stack handler and link into stack handler chain.