Fixed typo in frontends/ast/simplify.cc

diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 9b8ed76038e1e16ab057819fae19b31479000c4b..bc5dec7b982c5ee57ab6a2a2ea63c030f47dad79 100644 (file)
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -1065,7 +1065,7 @@ skip_dynamic_range_lvalue_expansion:;
                        {
                                AstNode *buf = children[0]->clone();
                                while (buf->simplify(true, false, false, stage, width_hint, sign_hint)) { }
-                               if (!buf->type == AST_CONSTANT)
+                               if (buf->type != AST_CONSTANT)
                                        log_error("Failed to evaluate system function `%s' with non-constant value at %s:%d.\n", str.c_str(), filename.c_str(), linenum);
 
                                RTLIL::Const arg_value = buf->bitsAsConst();