Regexp: Improve the speed that we scan for an initial point where a non-anchored

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

 // Copyright 2011 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 486 matching lines @@
   BranchOrBacktrack(not_equal, on_not_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckCharacterAfterAnd(uint32_t c,
                                                       uint32_t mask,
                                                       Label* on_equal) {
   if (c == 0) {
     __ test(current_character(), Immediate(mask));
   } else {
-    __ mov(eax, current_character());
-    __ and_(eax, mask);
+    __ mov(eax, mask);
+    __ and_(eax, current_character());
     __ cmp(eax, c);
   }
   BranchOrBacktrack(equal, on_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckNotCharacterAfterAnd(uint32_t c,
                                                          uint32_t mask,
                                                          Label* on_not_equal) {
   if (c == 0) {
     __ test(current_character(), Immediate(mask));
   } else {
-    __ mov(eax, current_character());
-    __ and_(eax, mask);
+    __ mov(eax, mask);
+    __ and_(eax, current_character());
     __ cmp(eax, c);
   }
   BranchOrBacktrack(not_equal, on_not_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckNotCharacterAfterMinusAnd(
     uc16 c,
     uc16 minus,
     uc16 mask,
@@ skipping 29 matching lines @@
   BranchOrBacktrack(above, on_not_in_range);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckBitInTable(
     Handle<ByteArray> table,
     Label* on_bit_set) {
   __ mov(eax, Immediate(table));
   Register index = current_character();
   if (mode_ != ASCII || kTableMask != String::kMaxAsciiCharCode) {
-    __ mov(ebx, current_character());
-    __ and_(ebx, kTableSize - 1);
+    __ mov(ebx, kTableSize - 1);
+    __ and_(ebx, current_character());
     index = ebx;
   }
   __ cmpb(FieldOperand(eax, index, times_1, ByteArray::kHeaderSize), 0);
   BranchOrBacktrack(not_equal, on_bit_set);
 }
 
 
 bool RegExpMacroAssemblerIA32::CheckSpecialCharacterClass(uc16 type,
                                                           Label* on_no_match) {
   // Range checks (c in min..max) are generally implemented by an unsigned
@@ skipping 744 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32