Streamline throwing in the C entry stub.

src/arm/macro-assembler-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1263 matching lines @@
   // If the handler is a JS frame, restore the context to the frame.
   // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp
   // or cp.
   tst(cp, cp);
   str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne);
 
   JumpToHandlerEntry();
 }
 
 
-void MacroAssembler::ThrowUncatchable(UncatchableExceptionType type,
-                                      Register value) {
+void MacroAssembler::ThrowUncatchable(Register value) {
   // Adjust this code if not the case.
   STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
 
   // The exception is expected in r0.
-  if (type == OUT_OF_MEMORY) {
-    // Set external caught exception to false.
-    ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress,
-                                      isolate());
-    mov(r0, Operand(false, RelocInfo::NONE));
-    mov(r2, Operand(external_caught));
-    str(r0, MemOperand(r2));
-
-    // Set pending exception and r0 to out of memory exception.
-    Failure* out_of_memory = Failure::OutOfMemoryException();
-    mov(r0, Operand(reinterpret_cast<int32_t>(out_of_memory)));
-    mov(r2, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
-                                      isolate())));
-    str(r0, MemOperand(r2));
-  } else if (!value.is(r0)) {
+  if (!value.is(r0)) {
     mov(r0, value);
   }
-
   // Drop the stack pointer to the top of the top stack handler.
   mov(r3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate())));
   ldr(sp, MemOperand(r3));
 
   // Unwind the handlers until the ENTRY handler is found.
   Label fetch_next, check_kind;
   jmp(&check_kind);
   bind(&fetch_next);
   ldr(sp, MemOperand(sp, StackHandlerConstants::kNextOffset));
 
@@ skipping 2403 matching lines @@
 void CodePatcher::EmitCondition(Condition cond) {
   Instr instr = Assembler::instr_at(masm_.pc_);
   instr = (instr & ~kCondMask) | cond;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM