MIPS: Improve array to string conversion.

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index f9f8c404c220cd194350229447257244d8817f48..0835bf20a0e444f05b224a4cf9ec13aea66d7e9e 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -3146,6 +3146,38 @@ 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(a2);
+  __ pop(a1);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::ONE_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, v0, a1, a2);
+  context()->Plug(v0);
+}
+
+
+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(a2);
+  __ pop(a1);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::TWO_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, v0, a1, a2);
+  context()->Plug(v0);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();