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-rw-r--r--frontends/ast/simplify.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 9b8ed760..bc5dec7b 100644
--- 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();