X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=includes%2FCmm.h;fp=includes%2FCmm.h;h=da0a2ac6bdc77af09952ba33d29cd73d77b65565;hb=f8f4cb3f3a46e0495917a927cefe906531b7b38e;hp=06a66a79ef724925a117fa5f8dd43af638409472;hpb=0ee0be109fd00ec629f7a2ad6a597885a0c9d5b4;p=ghc-hetmet.git

diff --git a/includes/Cmm.h b/includes/Cmm.h
index 06a66a7..da0a2ac 100644
--- a/includes/Cmm.h
+++ b/includes/Cmm.h
@@ -252,13 +252,34 @@
    Indirections can contain tagged pointers, so their tag is checked.
    -------------------------------------------------------------------------- */
 
+#ifdef PROFILING
+
+// When profiling, we cannot shortcut ENTER() by checking the tag,
+// because LDV profiling relies on entering closures to mark them as
+// "used".
+
+#define LOAD_INFO \
+    info = %INFO_PTR(UNTAG(P1));
+
+#define UNTAG_R1 \
+    P1 = UNTAG(P1);
+
+#else
+
+#define LOAD_INFO                               \
+  if (GETTAG(P1) != 0) {                        \
+      jump %ENTRY_CODE(Sp(0));                  \
+  }                                             \
+  info = %INFO_PTR(P1);
+
+#define UNTAG_R1 /* nothing */
+
+#endif
+
 #define ENTER()						\
  again:							\
   W_ info;						\
-  if (GETTAG(P1) != 0) {                                \
-      jump %ENTRY_CODE(Sp(0));				\
-  }                                                     \
-  info = %INFO_PTR(P1);					\
+  LOAD_INFO                                             \
   switch [INVALID_OBJECT .. N_CLOSURE_TYPES]		\
          (TO_W_( %INFO_TYPE(%STD_INFO(info)) )) {	\
   case							\
@@ -285,6 +306,7 @@
    }							\
   default:						\
    {							\
+      UNTAG_R1                                          \
       jump %ENTRY_CODE(info);				\
    }							\
   }