Don't generate a prototype for cas

[ghc-hetmet.git] / compiler / cmm / CLabel.hs

diff --git a/compiler/cmm/CLabel.hs b/compiler/cmm/CLabel.hs
index c151a26..901b13b 100644 (file)
--- a/compiler/cmm/CLabel.hs
+++ b/compiler/cmm/CLabel.hs
@@ -101,7 +101,7 @@ module CLabel (
         hasCAF,
        infoLblToEntryLbl, entryLblToInfoLbl, cvtToClosureLbl, cvtToSRTLbl,
        needsCDecl, isAsmTemp, maybeAsmTemp, externallyVisibleCLabel,
-        isMathFun,
+        isMathFun, isCas,
        isCFunctionLabel, isGcPtrLabel, labelDynamic,
 
        pprCLabel
@@ -590,9 +590,17 @@ maybeAsmTemp (AsmTempLabel uq)             = Just uq
 maybeAsmTemp _                                 = Nothing
 
 
+-- | Check whether a label corresponds to our cas function.
+--      We #include the prototype for this, so we need to avoid
+--      generating out own C prototypes.
+isCas :: CLabel -> Bool
+isCas (CmmLabel pkgId fn _) = pkgId == rtsPackageId && fn == fsLit "cas"
+isCas _                     = False
+
+
 -- | Check whether a label corresponds to a C function that has 
 --      a prototype in a system header somehere, or is built-in
---      to the C compiler. For these labels we abovoid generating our
+--      to the C compiler. For these labels we avoid generating our
 --      own C prototypes.
 isMathFun :: CLabel -> Bool
 isMathFun (ForeignLabel fs _ _ _)      = fs `elementOfUniqSet` math_funs