Revert revision 5657.

src/ia32/regexp-macro-assembler-ia32.cc

Index: src/ia32/regexp-macro-assembler-ia32.cc
diff --git a/src/ia32/regexp-macro-assembler-ia32.cc b/src/ia32/regexp-macro-assembler-ia32.cc
index 3d43a8b521ea56540f891480cbf9e3e14ee5785b..2aab7a8d943194c01d613a159446f8f59bf480a9 100644
--- a/src/ia32/regexp-macro-assembler-ia32.cc
+++ b/src/ia32/regexp-macro-assembler-ia32.cc
@@ -133,6 +133,7 @@ int RegExpMacroAssemblerIA32::stack_limit_slack()  {
 
 void RegExpMacroAssemblerIA32::AdvanceCurrentPosition(int by) {
   if (by != 0) {
+    Label inside_string;
     __ add(Operand(edi), Immediate(by * char_size()));
   }
 }
@@ -963,17 +964,6 @@ void RegExpMacroAssemblerIA32::ReadStackPointerFromRegister(int reg) {
   __ add(backtrack_stackpointer(), Operand(ebp, kStackHighEnd));
 }
 
-void RegExpMacroAssemblerIA32::SetCurrentPositionFromEnd(int by)  {
-  NearLabel after_position;
-  __ cmp(edi, -by * char_size());
-  __ j(above_equal, &after_position);
-  __ mov(edi, -by * char_size());
-  // On RegExp code entry (where this operation is used), the character before
-  // the current position is expected to be already loaded.
-  // We have advenced the position, so it's safe to read backwards.
-  LoadCurrentCharacterUnchecked(-1, 1);
-  __ bind(&after_position);
-}
 
 void RegExpMacroAssemblerIA32::SetRegister(int register_index, int to) {
   ASSERT(register_index >= num_saved_registers_);  // Reserved for positions!