Support StringCharCodeAt in hydrogen/lithium.

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index 67f87518a9e7d5cedb5d1f74781f16b53130cff6..50db3672093f9efccd8f863d5791c3c66f47bc61 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -114,6 +114,7 @@ class LCodeGen;
 //     LStoreNamed
 //       LStoreNamedField
 //       LStoreNamedGeneric
+//     LStringCharCodeAt
 //     LBitNotI
 //     LCallNew
 //     LCheckFunction
@@ -141,6 +142,7 @@ class LCodeGen;
 //     LReturn
 //     LSmiTag
 //     LStoreGlobal
+//     LStringLength
 //     LTaggedToI
 //     LThrow
 //     LTypeof
@@ -253,6 +255,8 @@ class LCodeGen;
   V(StoreKeyedGeneric)                          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
+  V(StringCharCodeAt)                           \
+  V(StringLength)                               \
   V(SubI)                                       \
   V(TaggedToI)                                  \
   V(Throw)                                      \
@@ -1590,6 +1594,34 @@ class LStoreKeyedGeneric: public LStoreKeyed {
 };
 
 
+class LStringCharCodeAt: public LTemplateInstruction<1, 2, 0> {
+ public:
+  LStringCharCodeAt(LOperand* string, LOperand* index) {
+    inputs_[0] = string;
+    inputs_[1] = index;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
+
+  LOperand* string() { return inputs_[0]; }
+  LOperand* index() { return inputs_[1]; }
+};
+
+
+class LStringLength: public LTemplateInstruction<1, 1> {

[fschneider, 2011/01/19 16:23:44]

For consistency I'd write 

public LTemplateInstruction<1, 1, 0>

(Probably I should remove the default T=0 template parameter for the number of
temps.)

[Vitaly Repeshko, 2011/01/19 20:08:41]

Done.

+ public:
+  explicit LStringLength(LOperand* string) {
+    inputs_[0] = string;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
+  DECLARE_HYDROGEN_ACCESSOR(StringLength)
+
+  LOperand* string() { return inputs_[0]; }
+};
+
+
 class LCheckFunction: public LTemplateInstruction<0, 1> {
  public:
   explicit LCheckFunction(LOperand* value) {