Remove unnecessary code for non-zero-length global regexps.

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 11790e5183e54857bfeb00af3566d2e779037676..399b24a18ab8942af4bcfb326c40dfa2679d8add 100644
--- a/src/arm/regexp-macro-assembler-arm.cc
+++ b/src/arm/regexp-macro-assembler-arm.cc
@@ -796,7 +796,7 @@ Handle<HeapObject> RegExpMacroAssemblerARM::GetCode(Handle<String> source) {
       for (int i = 0; i < num_saved_registers_; i += 2) {
         __ ldr(r2, register_location(i));
         __ ldr(r3, register_location(i + 1));
-        if (global()) {
+        if (i == 0 && global_with_zero_length_match()) {
           // Keep capture start in r4 for the zero-length check later.
           __ mov(r4, r2);
         }
@@ -834,18 +834,22 @@ Handle<HeapObject> RegExpMacroAssemblerARM::GetCode(Handle<String> source) {
 
       // Prepare r0 to initialize registers with its value in the next run.
       __ ldr(r0, MemOperand(frame_pointer(), kInputStartMinusOne));
-      // Special case for zero-length matches.
-      // r4: capture start index
-      __ cmp(current_input_offset(), r4);
-      // Not a zero-length match, restart.
-      __ b(ne, &load_char_start_regexp);
-      // Offset from the end is zero if we already reached the end.
-      __ cmp(current_input_offset(), Operand(0));
-      __ b(eq, &exit_label_);
-      // Advance current position after a zero-length match.
-      __ add(current_input_offset(),
-             current_input_offset(),
-             Operand((mode_ == UC16) ? 2 : 1));
+
+      if (global_with_zero_length_match()) {
+        // Special case for zero-length matches.
+        // r4: capture start index
+        __ cmp(current_input_offset(), r4);
+        // Not a zero-length match, restart.
+        __ b(ne, &load_char_start_regexp);
+        // Offset from the end is zero if we already reached the end.
+        __ cmp(current_input_offset(), Operand(0));
+        __ b(eq, &exit_label_);
+        // Advance current position after a zero-length match.
+        __ add(current_input_offset(),
+               current_input_offset(),
+               Operand((mode_ == UC16) ? 2 : 1));
+      }
+
       __ b(&load_char_start_regexp);
     } else {
       __ mov(r0, Operand(SUCCESS));