+continuationMaxStack :: [(CLabel, StackFormat)]
+ -> Continuation a
+ -> WordOff
+continuationMaxStack formats (Continuation _ label _ blocks) =
+ max_arg_size + stack_frame_size stack_format
+ where
+ stack_format = maybe unknown_format id $ lookup label formats
+ unknown_format = panic "Unknown format in continuationMaxStack"
+
+ max_arg_size = maximum $ 0 : map block_max_arg_size blocks
+
+ block_max_arg_size block =
+ maximum (final_arg_size (brokenBlockExit block) :
+ map stmt_arg_size (brokenBlockStmts block))
+
+ final_arg_size (FinalReturn args) =
+ argumentsSize (cmmExprRep . fst) args
+ final_arg_size (FinalJump _ args) =
+ argumentsSize (cmmExprRep . fst) args
+ final_arg_size (FinalCall next _ _ args) =
+ -- We have to account for the stack used when we build a frame
+ -- for the *next* continuation from *this* continuation
+ argumentsSize (cmmExprRep . fst) args +
+ stack_frame_size next_format
+ where
+ next_format = maybe unknown_format id $ lookup next' formats
+ next' = mkReturnPtLabel $ getUnique next
+
+ final_arg_size _ = 0
+
+ stmt_arg_size (CmmJump _ args) =
+ argumentsSize (cmmExprRep . fst) args
+ stmt_arg_size (CmmCall _ _ _ (CmmSafe _)) =
+ panic "Safe call in processFormats"
+ stmt_arg_size (CmmReturn _) =
+ panic "CmmReturn in processFormats"
+ stmt_arg_size _ = 0
+