Capture register clearing on loop iteration

src/regexp-macro-assembler-irregexp.h

Index: src/regexp-macro-assembler-irregexp.h
diff --git a/src/regexp-macro-assembler-irregexp.h b/src/regexp-macro-assembler-irregexp.h
index b2fba37cf6643f2c0e2d0b55ca531447dc056d03..95b903cc471a9801c69299893a09c4e9957ed546 100644
--- a/src/regexp-macro-assembler-irregexp.h
+++ b/src/regexp-macro-assembler-irregexp.h
@@ -66,6 +66,7 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
   virtual void AdvanceRegister(int reg, int by);  // r[reg] += by.
   virtual void SetRegister(int register_index, int to);
   virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
+  virtual void ClearRegister(int reg);

[Lasse Reichstein, 2009/01/14 08:38:34]

Could perhaps be called "ClearPositionRegister", because the value it resets to
is the -1 position. It does not make sense for, e.g., registers used as
counters.

[Christian Plesner Hansen, 2009/01/14 11:31:35]

Good point.

   virtual void ReadCurrentPositionFromRegister(int reg);
   virtual void WriteStackPointerToRegister(int reg);
   virtual void ReadStackPointerFromRegister(int reg);