From: Eddie Hung <eddie@fpgeh.com>
Date: Wed, 29 Jan 2020 01:41:57 +0000 (-0800)
Subject: synth_xilinx: fix help when no active_design; fixes #1664
X-Git-Tag: working-ls180~841
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0fd64aab25787e2591080cf71192ee16fcf2ae9f;p=yosys.git

synth_xilinx: fix help when no active_design; fixes #1664
---

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");