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

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

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 319 matching lines @@
     __ cmp(r4, r3);
     __ b(eq, &loop_check);
 
     // Mismatch, try case-insensitive match (converting letters to lower-case).
     __ orr(r3, r3, Operand(0x20));  // Convert capture character to lower-case.
     __ orr(r4, r4, Operand(0x20));  // Also convert input character.
     __ cmp(r4, r3);
     __ 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);
     __ b(lt, &loop);
     __ jmp(&success);
 
     __ bind(&fail);
     BranchOrBacktrack(al, on_no_match);
 
     __ bind(&success);
@@ skipping 1059 matching lines @@
   __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex));
 }
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM