From: Eddie Hung <eddie@fpgeh.com>
Date: Mon, 11 May 2020 16:33:19 +0000 (-0700)
Subject: verilog: fix #2037 by permitting (and freeing) attributes on null stmt
X-Git-Tag: working-ls180~538^2~5
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d21a07c7b5ef57de5428e5f7913338af582146b5;p=yosys.git

verilog: fix #2037 by permitting (and freeing) attributes on null stmt
---

diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y
index d39b72547..a0250439e 100644
--- a/frontends/verilog/verilog_parser.y
+++ b/frontends/verilog/verilog_parser.y
@@ -2228,7 +2228,11 @@ simple_behavioral_stmt:
 behavioral_stmt:
 	defattr | assert | wire_decl | param_decl | localparam_decl | typedef_decl |
 	non_opt_delay behavioral_stmt |
-	attr simple_behavioral_stmt ';' | ';' |
+	attr simple_behavioral_stmt ';' |
+	attr ';' {
+		log_file_warning(current_filename, get_line_num(), "Attribute(s) attached to null statement. Ignoring.\n");
+		free_attr($1);
+	} |
 	attr hierarchical_id {
 		AstNode *node = new AstNode(AST_TCALL);
 		node->str = *$2;