X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FcodeGen%2FCgTailCall.lhs;h=60a856177c41e470c3328e32b7d2613ae11a2807;hb=f8f4cb3f3a46e0495917a927cefe906531b7b38e;hp=e4f79a7aa6bde56706eb66fe7ea5d47d12abfd7e;hpb=0ee0be109fd00ec629f7a2ad6a597885a0c9d5b4;p=ghc-hetmet.git

diff --git a/compiler/codeGen/CgTailCall.lhs b/compiler/codeGen/CgTailCall.lhs
index e4f79a7..60a8561 100644
--- a/compiler/codeGen/CgTailCall.lhs
+++ b/compiler/codeGen/CgTailCall.lhs
@@ -35,6 +35,7 @@ import Id
 import StgSyn
 import PrimOp
 import Outputable
+import StaticFlags
 
 import Control.Monad
 
@@ -183,7 +184,10 @@ performTailCall fun_info arg_amodes pending_assts
     untag_node = CmmAssign nodeReg (cmmUntag (CmmReg nodeReg))
     -- Test if closure is a constructor
     maybeSwitchOnCons enterClosure eob
-              | EndOfBlockInfo _ (CaseAlts lbl _ _) <- eob
+              | EndOfBlockInfo _ (CaseAlts lbl _ _) <- eob,
+                not opt_SccProfilingOn
+                -- we can't shortcut when profiling is on, because we have
+                -- to enter a closure to mark it as "used" for LDV profiling
               = do { is_constr <- newLabelC
                    -- Is the pointer tagged?
                    -- Yes, jump to switch statement