PPC: [fullcode] Change fullcode to compile finally using the token approach.

src/full-codegen/ppc/full-codegen-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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 4524 matching lines @@
   }
   __ push(ip);
 }
 
 
 // ----------------------------------------------------------------------------
 // Non-local control flow support.
 
 void FullCodeGenerator::EnterFinallyBlock() {
   DCHECK(!result_register().is(r4));
-  // Store result register while executing finally block.
-  __ push(result_register());
-  // Cook return address in link register to stack (smi encoded Code* delta)
-  __ mflr(r4);
-  __ mov(ip, Operand(masm_->CodeObject()));
-  __ sub(r4, r4, ip);
-  __ SmiTag(r4);
-
-  // Store result register while executing finally block.
-  __ push(r4);
-
   // Store pending message while executing finally block.
   ExternalReference pending_message_obj =
       ExternalReference::address_of_pending_message_obj(isolate());
   __ mov(ip, Operand(pending_message_obj));
   __ LoadP(r4, MemOperand(ip));
   __ push(r4);
 
   ClearPendingMessage();
 }
 
 
 void FullCodeGenerator::ExitFinallyBlock() {
   DCHECK(!result_register().is(r4));
   // Restore pending message from stack.
   __ pop(r4);
   ExternalReference pending_message_obj =
       ExternalReference::address_of_pending_message_obj(isolate());
   __ mov(ip, Operand(pending_message_obj));
   __ StoreP(r4, MemOperand(ip));
-
-  // Restore result register from stack.
-  __ pop(r4);
-
-  // Uncook return address and return.
-  __ pop(result_register());
-  __ SmiUntag(r4);
-  __ mov(ip, Operand(masm_->CodeObject()));
-  __ add(ip, ip, r4);
-  __ mtctr(ip);
-  __ bctr();
 }
 
 
 void FullCodeGenerator::ClearPendingMessage() {
   DCHECK(!result_register().is(r4));
   ExternalReference pending_message_obj =
       ExternalReference::address_of_pending_message_obj(isolate());
   __ LoadRoot(r4, Heap::kTheHoleValueRootIndex);
   __ mov(ip, Operand(pending_message_obj));
   __ StoreP(r4, MemOperand(ip));
 }
 
 
 void FullCodeGenerator::EmitLoadStoreICSlot(FeedbackVectorSlot slot) {
   DCHECK(!slot.IsInvalid());
   __ mov(VectorStoreICTrampolineDescriptor::SlotRegister(),
          Operand(SmiFromSlot(slot)));
 }
 
+void FullCodeGenerator::DeferredCommands::EmitCommands() {
+  DCHECK(!result_register().is(r4));
+  // Restore the accumulator (r3) and token (r4).
+  __ Pop(r4, result_register());
+  for (DeferredCommand cmd : commands_) {
+    Label skip;
+    __ CmpSmiLiteral(r4, Smi::FromInt(cmd.token), r0);
+    __ bne(&skip);
+    switch (cmd.command) {
+      case kReturn:
+        codegen_->EmitUnwindAndReturn();
+        break;
+      case kThrow:
+        __ Push(result_register());
+        __ CallRuntime(Runtime::kReThrow);
+        break;
+      case kContinue:
+        codegen_->EmitContinue(cmd.target);
+        break;
+      case kBreak:
+        codegen_->EmitBreak(cmd.target);
+        break;
+    }
+    __ bind(&skip);
+  }
+}
 
 #undef __
 
 
 void BackEdgeTable::PatchAt(Code* unoptimized_code, Address pc,
                             BackEdgeState target_state,
                             Code* replacement_code) {
   Address mov_address = Assembler::target_address_from_return_address(pc);
   Address cmp_address = mov_address - 2 * Assembler::kInstrSize;
   Isolate* isolate = unoptimized_code->GetIsolate();
@@ skipping 56 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC