DoNumberTagD performance improvement

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index ff0deef0f46dff25a17eb5cbae7b1ae5c3b0f47b..448259f735322f2f0d14d15b0b84e9fe2b427eec 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -731,7 +731,8 @@ class MacroAssembler: public Assembler {
                           Register scratch1,
                           Register scratch2,
                           Register heap_number_map,
-                          Label* gc_required);
+                          Label* gc_required,
+                          bool tagged = true);

[danno, 2012/10/10 12:27:53]

Use an enum here, like "enum TaggingMode { TAG_RESULT, DONT_TAG_RESULT }" ,
otherwise at the call site it's difficult to tell what the true/false actually
means

[aberent, 2012/10/11 15:16:53]

Done.

   void AllocateHeapNumberWithValue(Register result,
                                    DwVfpRegister value,
                                    Register scratch1,