From: Clifford Wolf <clifford@clifford.at>
Date: Tue, 30 Apr 2019 13:03:32 +0000 (+0200)
Subject: Add final loop variable assignment when unrolling for-loops, fixes #968
X-Git-Tag: yosys-0.9~142^2~8^2
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9af825e31e493bec6f0d86b8f30aeee436ed50df;p=yosys.git

Add final loop variable assignment when unrolling for-loops, fixes #968

Signed-off-by: Clifford Wolf <clifford@clifford.at>
---

diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 3e453bd7f..a342bf5d9 100644
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -1172,6 +1172,13 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 			varbuf->children[0] = buf;
 		}
 
+		if (type == AST_FOR) {
+			AstNode *buf = next_ast->clone();
+			delete buf->children[1];
+			buf->children[1] = varbuf->children[0]->clone();
+			current_block->children.insert(current_block->children.begin() + current_block_idx++, buf);
+		}
+
 		current_scope[varbuf->str] = backup_scope_varbuf;
 		delete varbuf;
 		delete_children();