Add missing StgPrimCallOp case to isSimpleOp

diff --git a/compiler/codeGen/StgCmmExpr.hs b/compiler/codeGen/StgCmmExpr.hs
index 065005c..96b9e31 100644 (file)
--- a/compiler/codeGen/StgCmmExpr.hs
+++ b/compiler/codeGen/StgCmmExpr.hs
@@ -322,6 +322,7 @@ isSimpleOp :: StgOp -> Bool
 isSimpleOp (StgFCallOp (CCall (CCallSpec _ _ safe)) _) = not (playSafe safe)
 isSimpleOp (StgFCallOp (DNCall _) _)                   = False         -- Safe!
 isSimpleOp (StgPrimOp op)                                     = not (primOpOutOfLine op)
+isSimpleOp (StgPrimCallOp _)                           = False
 
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 chooseReturnBndrs :: Id -> AltType -> [StgAlt] -> [NonVoid Id]