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

src/arm/regexp-macro-assembler-arm.cc

Index: src/arm/regexp-macro-assembler-arm.cc
diff --git a/src/arm/regexp-macro-assembler-arm.cc b/src/arm/regexp-macro-assembler-arm.cc
index 608c20990a9c080a4ebaabc7288d10aeddb0f6a3..acb24ef14eeff9e2c28243f5b0982452497c4507 100644
--- a/src/arm/regexp-macro-assembler-arm.cc
+++ b/src/arm/regexp-macro-assembler-arm.cc
@@ -337,8 +337,17 @@ void RegExpMacroAssemblerARM::CheckNotBackReferenceIgnoreCase(
     __ b(ne, &fail);
     __ sub(r3, r3, Operand('a'));
     __ cmp(r3, Operand('z' - 'a'));  // Is r3 a lowercase letter?
+#ifndef ENABLE_LATIN_1
     __ b(hi, &fail);
-
+#else
+    __ b(ls, &loop_check);  // In range 'a'-'z'.
+    // Latin-1: Check for values in range [224,254] but not 247.
+    __ sub(r3, r3, Operand(224 - 'a'));
+    __ cmp(r3, Operand(254 - 224));
+    __ b(hi, &fail);  // Weren't Latin-1 letters.
+    __ cmp(r3, Operand(247 - 224));  // Check for 247.
+    __ b(eq, &fail);
+#endif
 
     __ bind(&loop_check);
     __ cmp(r0, r1);