Require a bang pattern when unlifted types are where/let bound; #3182

[ghc-hetmet.git] / compiler / profiling / CostCentre.lhs

diff --git a/compiler/profiling/CostCentre.lhs b/compiler/profiling/CostCentre.lhs
index 4d13f10..aff29d8 100644 (file)
--- a/compiler/profiling/CostCentre.lhs
+++ b/compiler/profiling/CostCentre.lhs
@@ -39,6 +39,7 @@ module CostCentre (
 import Var             ( Id )
 import Name
 import Module          ( Module )
+import Unique
 import Outputable      
 import FastTypes
 import FastString
@@ -226,12 +227,14 @@ mkAutoCC id mod is_caf
     }
   where 
         name = getName id
-        -- beware: we might be making an auto CC for a compiler-generated
-        -- thing (like a CAF when -caf-all is on), so include the uniq.
-        -- See bug #249, tests prof001, prof002
-        str | isSystemName name = mkFastString (showSDoc (ppr name))
-            | otherwise         = occNameFS (getOccName id)
-
+        -- beware: only external names are guaranteed to have unique
+        -- Occnames.  If the name is not external, we must append its
+        -- Unique.
+        -- See bug #249, tests prof001, prof002,  also #2411
+        str | isExternalName name = occNameFS (getOccName id)
+            | otherwise           = mkFastString $ showSDoc $
+                                      ftext (occNameFS (getOccName id))
+                                      <> char '_' <> pprUnique (getUnique name)
 mkAllCafsCC :: Module -> CostCentre
 mkAllCafsCC m = AllCafsCC  { cc_mod = m }
 
@@ -297,8 +300,8 @@ cmpCostCentre (NormalCC {cc_name = n1, cc_mod =  m1, cc_is_caf = c1})
 
 cmpCostCentre other_1 other_2
   = let
-       tag1 = tag_CC other_1
-       tag2 = tag_CC other_2
+       !tag1 = tag_CC other_1
+       !tag2 = tag_CC other_2
     in
     if tag1 <# tag2 then LT else GT
   where