Use Copy-on-write arrays for cached regexp results.

src/arm/full-codegen-arm.cc

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 //
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@@ skipping 2518 matching lines @@
 void FullCodeGenerator::EmitRegExpConstructResult(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 3);
   VisitForValue(args->at(0), kStack);
   VisitForValue(args->at(1), kStack);
   VisitForValue(args->at(2), kStack);
   __ CallRuntime(Runtime::kRegExpConstructResult, 3);
   Apply(context_, r0);
 }
 
 
+void FullCodeGenerator::EmitRegExpCloneResult(ZoneList<Expression*>* args) {

[Vitaly Repeshko, 2010/08/20 13:29:49]

Can this be moved to the architecture independent full-codegen?

[Lasse Reichstein, 2010/08/23 12:52:11]

Done.
There actually seems to be a lot of Emit-runtime-call function that can be
generalized.

+  ASSERT(args->length() == 1);
+  VisitForValue(args->at(0), kStack);
+  __ CallRuntime(Runtime::kRegExpConstructResult, 1);

[Vitaly Repeshko, 2010/08/20 13:29:49]

kRegExpConstructResult -> kRegExpCloneResult.

[Lasse Reichstein, 2010/08/23 12:52:11]

Fixed.

+  Apply(context_, r0);
+}
+
+
 void FullCodeGenerator::EmitSwapElements(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 3);
   VisitForValue(args->at(0), kStack);
   VisitForValue(args->at(1), kStack);
   VisitForValue(args->at(2), kStack);
   __ CallRuntime(Runtime::kSwapElements, 3);
   Apply(context_, r0);
 }
 
 
@@ skipping 694 matching lines @@
   __ mov(r1, Operand(r1, ASR, 1));  // Un-smi-tag value.
   __ add(pc, r1, Operand(masm_->CodeObject()));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM