Fixed O(n^2) performance bug in verilog preprocessor

diff --git a/frontends/verilog/preproc.cc b/frontends/verilog/preproc.cc
index 9f824526a38d5b022581fd3716b5c4b5342fffba..8d435d94051c1550c28bfe0cc5c66d3f0cac3a9a 100644 (file)
--- a/frontends/verilog/preproc.cc
+++ b/frontends/verilog/preproc.cc
@@ -62,7 +62,7 @@ static void insert_input(std::string str)
 
 static char next_char()
 {
-       if (input_buffer.size() == 0)
+       if (input_buffer.empty())
                return 0;
 
        assert(input_buffer_charp <= input_buffer.front().size());