Continues Latin-1 support. All tests pass with ENABLE_LATIN_1 flag.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 04086586e5083ddb82f1f05e0fc3ea9b99dfa885..3e27fafc476561a7fb19599a1ebf9924846101ac 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -6463,7 +6463,12 @@ void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
   // Compare lengths -  strings up to min-length are equal.
   __ bind(&compare_lengths);
   __ test(length_delta, length_delta);
+#ifndef ENABLE_LATIN_1
   __ j(not_zero, &result_not_equal, Label::kNear);
+#else
+  Label length_not_equal;
+  __ j(not_zero, &length_not_equal, Label::kNear);
+#endif
 
   // Result is EQUAL.
   STATIC_ASSERT(EQUAL == 0);
@@ -6472,8 +6477,19 @@ void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
   __ ret(0);
 
   Label result_greater;
+#ifdef ENABLE_LATIN_1
+  Label result_less;
+  __ bind(&length_not_equal);
+  __ j(greater, &result_greater, Label::kNear);
+  __ jmp(&result_less, Label::kNear);
+#endif
   __ bind(&result_not_equal);
+#ifndef ENABLE_LATIN_1
   __ j(greater, &result_greater, Label::kNear);
+#else
+  __ j(above, &result_greater, Label::kNear);
+  __ bind(&result_less);
+#endif
 
   // Result is LESS.
   __ Set(eax, Immediate(Smi::FromInt(LESS)));