2 files changed, 19 insertions, 4 deletions
diff --git a/techlibs/ice40/cells_sim.v b/techlibs/ice40/cells_sim.v
index 40972766d..b5e10fb20 100644
--- a/techlibs/ice40/cells_sim.v
+++ b/techlibs/ice40/cells_sim.v
@@ -957,10 +957,21 @@ endmodule
 
 (* blackbox *)
 module SB_HFOSC(
+	input TRIM0,
+	input TRIM1,
+	input TRIM2,
+	input TRIM3,
+	input TRIM4,
+	input TRIM5,
+	input TRIM6,
+	input TRIM7,
+	input TRIM8,
+	input TRIM9,
 	input CLKHFPU,
 	input CLKHFEN,
 	output CLKHF
 );
+parameter TRIM_EN = "0b0";
 parameter CLKHF_DIV = "0b00";
 endmodule
 
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 718f9d9e0..168161a90 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -245,11 +245,13 @@ struct SynthIce40Pass : public ScriptPass
 			run("proc");
 		}
 
-		if (flatten && check_label("flatten", "(unless -noflatten)"))
+		if (check_label("flatten", "(unless -noflatten)"))
 		{
-			run("flatten");
-			run("tribuf -logic");
-			run("deminout");
+			if (flatten) {
+				run("flatten");
+				run("tribuf -logic");
+				run("deminout");
+			}
 		}
 
 		if (check_label("coarse"))
@@ -259,6 +261,8 @@ struct SynthIce40Pass : public ScriptPass
 			run("check");
 			run("opt");
 			run("wreduce");
+			run("peepopt");
+			run("opt_clean");
 			run("share");
 			run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
 			run("opt_expr");