Fix argument passing to generated regexp code in Win64.

src/x64/regexp-macro-assembler-x64.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 785 matching lines @@
   __ push(rsi);
   __ push(rdx);
   __ push(rcx);
   __ push(r8);
   __ push(r9);
 
   __ push(rbx);  // Callee-save
 #endif
 
   __ push(Immediate(0));  // Number of successful matches in a global regexp.
-  __ push(Immediate(0));  // Make room for "at start" constant.
+  __ push(Immediate(0));  // Make room for "input start - 1" constant.
 
   // Check if we have space on the stack for registers.
   Label stack_limit_hit;
   Label stack_ok;
 
   ExternalReference stack_limit =
       ExternalReference::address_of_stack_limit(masm_.isolate());
   __ movq(rcx, rsp);
   __ movq(kScratchRegister, stack_limit);
   __ subq(rcx, Operand(kScratchRegister, 0));
@@ skipping 48 matching lines @@
       i += kRegistersPerPage) {
     __ movq(register_location(i), rax);  // One write every page.
   }
 #endif  // WIN32
 
   // Initialize code object pointer.
   __ Move(code_object_pointer(), masm_.CodeObject());
 
   Label load_char_start_regexp, start_regexp;
   // Load newline if index is at start, previous character otherwise.
-  __ cmpb(Operand(rbp, kStartIndex), Immediate(0));
+  __ cmpl(Operand(rbp, kStartIndex), Immediate(0));
   __ j(not_equal, &load_char_start_regexp, Label::kNear);
   __ Set(current_character(), '\n');
   __ jmp(&start_regexp, Label::kNear);
 
   // Global regexp restarts matching here.
   __ bind(&load_char_start_regexp);
   // Load previous char as initial value of current character register.
   LoadCurrentCharacterUnchecked(-1, 1);
   __ bind(&start_regexp);
 
@@ skipping 51 matching lines @@
         __ movl(Operand(rbx, i * kIntSize), rax);
       }
     }
 
     if (global()) {
       // Restart matching if the regular expression is flagged as global.
       // Increment success counter.
       __ incq(Operand(rbp, kSuccessfulCaptures));
       // Capture results have been stored, so the number of remaining global
       // output registers is reduced by the number of stored captures.
-      __ movq(rcx, Operand(rbp, kNumOutputRegisters));
+      __ movsxlq(rcx, Operand(rbp, kNumOutputRegisters));
       __ subq(rcx, Immediate(num_saved_registers_));
       // Check whether we have enough room for another set of capture results.
       __ cmpq(rcx, Immediate(num_saved_registers_));
       __ j(less, &exit_label_);
 
       __ movq(Operand(rbp, kNumOutputRegisters), rcx);
       // Advance the location for output.
       __ addq(Operand(rbp, kRegisterOutput),
               Immediate(num_saved_registers_ * kIntSize));
 
@@ skipping 573 matching lines @@
   }
 }
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64