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-rw-r--r--techlibs/xilinx/synth_xilinx.cc5
1 files changed, 3 insertions, 2 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index 3c5599e4e..9b4b1f71a 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -316,9 +316,10 @@ struct SynthXilinxPass : public ScriptPass
run("proc");
if (flatten || help_mode)
run("flatten", "(with '-flatten')");
- active_design->scratchpad_unset("tribuf.added_something");
+ if (active_design)
+ active_design->scratchpad_unset("tribuf.added_something");
run("tribuf -logic");
- if (noiopad && active_design->scratchpad_get_bool("tribuf.added_something"))
+ if (noiopad && active_design && active_design->scratchpad_get_bool("tribuf.added_something"))
log_error("Tristate buffers are unsupported without the '-iopad' option.\n");
run("deminout");
run("opt_expr");