optimisation for isAlive()

233a4687 · simonmarhaskell@gmail.com · 01e06bc4 · 233a4687
Commit 233a4687 authored Apr 16, 2008 by simonmarhaskell@gmail.com
--- a/rts/sm/GCAux.c
+++ b/rts/sm/GCAux.c
@@ -41,7 +41,6 @@ isAlive(StgClosure *p)
    q = UNTAG_CLOSURE(p);

    ASSERT(LOOKS_LIKE_CLOSURE_PTR(q));
-    info = get_itbl(q);

    // ignore static closures 
    //
@@ -71,6 +70,7 @@ isAlive(StgClosure *p)
 	return p;
    }

+    info = get_itbl(q);
    switch (info->type) {

    case IND: