X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=compiler%2FbasicTypes%2FModule.lhs;h=6916911a7dea937e9b0c94266465b7c258676500;hb=e1cae1230d5b334c045d0c568d5bf7d02a26dbd7;hp=0221a1b87fc32afe66040219cc2dfaba9fd23763;hpb=4b01f5dedecdab28e2524f7d9adc77449f596dcc;p=ghc-hetmet.git

diff --git a/compiler/basicTypes/Module.lhs b/compiler/basicTypes/Module.lhs
index 0221a1b..6916911 100644
--- a/compiler/basicTypes/Module.lhs
+++ b/compiler/basicTypes/Module.lhs
@@ -19,6 +19,7 @@ module Module
         moduleNameSlashes,
 	mkModuleName,
 	mkModuleNameFS,
+	stableModuleNameCmp,
 
         -- * The PackageId type
         PackageId,
@@ -26,8 +27,11 @@ module Module
         packageIdFS,
         stringToPackageId,
         packageIdString,
+	stablePackageIdCmp,
 
 	-- * Wired-in PackageIds
+	primPackageId,
+	integerPackageId,
 	basePackageId,
 	rtsPackageId,
 	haskell98PackageId,
@@ -40,6 +44,7 @@ module Module
 	modulePackageId, moduleName,
 	pprModule,
 	mkModule,
+        stableModuleCmp,
 
 	-- * The ModuleLocation type
 	ModLocation(..),
@@ -62,14 +67,14 @@ module Module
 	elemModuleSet
     ) where
 
-#include "HsVersions.h"
 import Outputable
 import qualified Pretty
 import Unique
 import FiniteMap
-import UniqFM
+import LazyUniqFM
 import FastString
 import Binary
+import Util
 
 import System.FilePath
 \end{code}
@@ -158,6 +163,10 @@ instance Binary ModuleName where
   put_ bh (ModuleName fs) = put_ bh fs
   get bh = do fs <- get bh; return (ModuleName fs)
 
+stableModuleNameCmp :: ModuleName -> ModuleName -> Ordering
+-- Compare lexically, not by unique
+stableModuleNameCmp n1 n2 = moduleNameFS n1 `compare` moduleNameFS n2
+
 pprModuleName :: ModuleName -> SDoc
 pprModuleName (ModuleName nm) = 
     getPprStyle $ \ sty ->
@@ -204,8 +213,13 @@ instance Binary Module where
   put_ bh (Module p n) = put_ bh p >> put_ bh n
   get bh = do p <- get bh; n <- get bh; return (Module p n)
 
-instance Uniquable PackageId where
- getUnique pid = getUnique (packageIdFS pid)
+-- This gives a stable ordering, as opposed to the Ord instance which
+-- gives an ordering based on the Uniques of the components, which may
+-- not be stable from run to run of the compiler.
+stableModuleCmp :: Module -> Module -> Ordering
+stableModuleCmp (Module p1 n1) (Module p2 n2) 
+   = (p1 `stablePackageIdCmp`  p2) `thenCmp`
+     (n1 `stableModuleNameCmp` n2)
 
 mkModule :: PackageId -> ModuleName -> Module
 mkModule = Module
@@ -234,9 +248,20 @@ pprPackagePrefix p mod = getPprStyle doc
 %************************************************************************
 
 \begin{code}
-newtype PackageId = PId FastString deriving( Eq, Ord )  -- includes the version
+newtype PackageId = PId FastString deriving( Eq )  -- includes the version
     -- here to avoid module loops with PackageConfig
 
+instance Uniquable PackageId where
+ getUnique pid = getUnique (packageIdFS pid)
+
+-- Note: *not* a stable lexicographic ordering, a faster unique-based
+-- ordering.
+instance Ord PackageId where
+  nm1 `compare` nm2 = getUnique nm1 `compare` getUnique nm2
+
+stablePackageIdCmp :: PackageId -> PackageId -> Ordering
+stablePackageIdCmp p1 p2 = packageIdFS p1 `compare` packageIdFS p2
+
 instance Outputable PackageId where
    ppr pid = text (packageIdString pid)
 
@@ -277,18 +302,21 @@ packageIdString = unpackFS . packageIdFS
 -- package that depends directly or indirectly on it (much as if you
 -- had used -ignore-package).
 
-basePackageId, rtsPackageId, haskell98PackageId, 
+integerPackageId, primPackageId,
+  basePackageId, rtsPackageId, haskell98PackageId,
   thPackageId, ndpPackageId, mainPackageId  :: PackageId
-basePackageId      = fsToPackageId FSLIT("base")
-rtsPackageId	   = fsToPackageId FSLIT("rts")
-haskell98PackageId = fsToPackageId FSLIT("haskell98")
-thPackageId        = fsToPackageId FSLIT("template-haskell")
-ndpPackageId       = fsToPackageId FSLIT("ndp")
+primPackageId      = fsToPackageId (fsLit "ghc-prim")
+integerPackageId   = fsToPackageId (fsLit "integer")
+basePackageId      = fsToPackageId (fsLit "base")
+rtsPackageId	   = fsToPackageId (fsLit "rts")
+haskell98PackageId = fsToPackageId (fsLit "haskell98")
+thPackageId        = fsToPackageId (fsLit "template-haskell")
+ndpPackageId       = fsToPackageId (fsLit "ndp")
 
 -- This is the package Id for the program.  It is the default package
 -- Id if you don't specify a package name.  We don't add this prefix
 -- to symbol name, since there can be only one main package per program.
-mainPackageId	   = fsToPackageId FSLIT("main")
+mainPackageId	   = fsToPackageId (fsLit "main")
 \end{code}
 
 %************************************************************************