Fix a space leak in the native code gen (again)

diff --git a/compiler/nativeGen/AsmCodeGen.lhs b/compiler/nativeGen/AsmCodeGen.lhs
index b7e4797..a99d60a 100644 (file)
--- a/compiler/nativeGen/AsmCodeGen.lhs
+++ b/compiler/nativeGen/AsmCodeGen.lhs
@@ -236,19 +236,19 @@ cmmNativeGens dflags h us (cmm : cmms) impAcc profAcc count
        Pretty.bufLeftRender h
                $ {-# SCC "pprNativeCode" #-} Pretty.vcat $ map pprNatCmmTop native
 
        Pretty.bufLeftRender h
                $ {-# SCC "pprNativeCode" #-} Pretty.vcat $ map pprNatCmmTop native
 

-       let lsPprNative =
+           -- carefully evaluate this strictly.  Binding it with 'let'
+           -- and then using 'seq' doesn't work, because the let
+           -- apparently gets inlined first.
+       lsPprNative <- return $!

                if  dopt Opt_D_dump_asm       dflags
                 || dopt Opt_D_dump_asm_stats dflags
                        then native
                        else []
 
                if  dopt Opt_D_dump_asm       dflags
                 || dopt Opt_D_dump_asm_stats dflags
                        then native
                        else []
 

-       let count'      = count + 1;
-
+       count' <- return $! count + 1;

 
        -- force evaulation all this stuff to avoid space leaks
        seqString (showSDoc $ vcat $ map ppr imports) `seq` return ()
 
        -- force evaulation all this stuff to avoid space leaks
        seqString (showSDoc $ vcat $ map ppr imports) `seq` return ()

-       lsPprNative     `seq` return ()
-       count'          `seq` return ()

 
        cmmNativeGens dflags h us' cmms
                        (imports : impAcc)
 
        cmmNativeGens dflags h us' cmms
                        (imports : impAcc)