Improve array to string conversion.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 6dfec929c6e798a29fd2bc8cebddadb1dccf7a10..eef2992ac0f12daea951d365b144f4bd98c85422 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -3074,6 +3074,36 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(ecx);
+  __ pop(ebx);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  SeqStringSetCharGenerator::Generate(masm_, true, eax, ebx, ecx);

[Toon Verwaest, 2012/12/05 14:29:12]

Can we use an enum rather than bool to indicate two vs one?

+  context()->Plug(eax);
+}
+
+
+void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(ecx);
+  __ pop(ebx);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  SeqStringSetCharGenerator::Generate(masm_, false, eax, ebx, ecx);
+  context()->Plug(eax);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();