diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index 964818a..e177ced 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -1247,7 +1247,7 @@
 	etype := s.concreteEtype(t)
 	x, ok := opToSSA[opAndType{op, etype}]
 	if !ok {
-		s.Unimplementedf("unhandled binary op %s %s", op, Econv(etype))
+		s.Unimplementedf("unhandled binary op %s %s", op, etype)
 	}
 	return x
 }
@@ -1405,7 +1405,7 @@
 	etype2 := s.concreteEtype(u)
 	x, ok := shiftOpToSSA[opAndTwoTypes{op, etype1, etype2}]
 	if !ok {
-		s.Unimplementedf("unhandled shift op %s etype=%s/%s", op, Econv(etype1), Econv(etype2))
+		s.Unimplementedf("unhandled shift op %s etype=%s/%s", op, etype1, etype2)
 	}
 	return x
 }
@@ -1414,7 +1414,7 @@
 	etype1 := s.concreteEtype(t)
 	x, ok := opToSSA[opAndType{op, etype1}]
 	if !ok {
-		s.Unimplementedf("unhandled rotate op %s etype=%s", op, Econv(etype1))
+		s.Unimplementedf("unhandled rotate op %s etype=%s", op, etype1)
 	}
 	return x
 }
@@ -1561,7 +1561,7 @@
 			return nil
 		}
 		if etypesign(from.Etype) != etypesign(to.Etype) {
-			s.Fatalf("CONVNOP sign mismatch %v (%s) -> %v (%s)\n", from, Econv(from.Etype), to, Econv(to.Etype))
+			s.Fatalf("CONVNOP sign mismatch %v (%s) -> %v (%s)\n", from, from.Etype, to, to.Etype)
 			return nil
 		}
 
@@ -1706,7 +1706,7 @@
 				s.newValue1(op, ttp, s.newValue1(ssa.OpComplexImag, ftp, x)))
 		}
 
-		s.Unimplementedf("unhandled OCONV %s -> %s", Econv(n.Left.Type.Etype), Econv(n.Type.Etype))
+		s.Unimplementedf("unhandled OCONV %s -> %s", n.Left.Type.Etype, n.Type.Etype)
 		return nil
 
 	case ODOTTYPE: