Remove unused imports

[ghc-hetmet.git] / compiler / codeGen / CgCon.lhs

diff --git a/compiler/codeGen/CgCon.lhs b/compiler/codeGen/CgCon.lhs
index a700ccd..8259584 100644 (file)
--- a/compiler/codeGen/CgCon.lhs
+++ b/compiler/codeGen/CgCon.lhs
@@ -47,6 +47,7 @@ import Outputable
 import ListSetOps
 import Util
 import FastString
+import StaticFlags
 \end{code}
 
 
@@ -296,6 +297,11 @@ sure the @amodes@ passed don't conflict with each other.
 cgReturnDataCon :: DataCon -> [(CgRep, CmmExpr)] -> Code
 
 cgReturnDataCon con amodes
+  | isUnboxedTupleCon con = returnUnboxedTuple amodes
+      -- when profiling we can't shortcut here, we have to enter the closure
+      -- for it to be marked as "used" for LDV profiling.
+  | opt_SccProfilingOn    = build_it_then enter_it
+  | otherwise
   = ASSERT( amodes `lengthIs` dataConRepArity con )
     do { EndOfBlockInfo _ sequel <- getEndOfBlockInfo
        ; case sequel of
@@ -319,11 +325,12 @@ cgReturnDataCon con amodes
                        | isDeadBinder bndr -> performReturn (jump_to deflt_lbl)
                        | otherwise         -> build_it_then (jump_to deflt_lbl) }
     
-           _   -- The usual case
-             | isUnboxedTupleCon con -> returnUnboxedTuple amodes
-              | otherwise -> build_it_then emitReturnInstr
+           _otherwise  -- The usual case
+              -> build_it_then emitReturnInstr
        }
   where
+    enter_it    = stmtsC [ CmmAssign nodeReg (cmmUntag (CmmReg nodeReg)),
+                           CmmJump (entryCode (closureInfoPtr (CmmReg nodeReg))) [] ]
     jump_to lbl = stmtC (CmmJump (CmmLit lbl) [])
     build_it_then return_code
       = do {   -- BUILD THE OBJECT IN THE HEAP
@@ -430,7 +437,7 @@ cgDataCon data_con
                = do { code_blks <- getCgStmts the_code
                     ; emitClosureCodeAndInfoTable cl_info [] code_blks }
                where
-                 the_code = do { ticky_code
+                 the_code = do { _ <- ticky_code
                                ; ldvEnter (CmmReg nodeReg)
                                ; body_code }