From c22fb76664559abb0bac838e03a34b140d3146ee Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Wed, 1 Apr 2020 09:59:23 -0700 Subject: [PATCH] ast: cap dynamic range select to size of signal, suppresses warnings --- frontends/ast/simplify.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 073b9cbbe..26c1cc7a9 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -1732,8 +1732,9 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, AstNode *cond = new AstNode(AST_COND, mkconst_int(start_bit, true)); AstNode *lvalue = children[0]->clone(); lvalue->delete_children(); + int end_bit = std::min(start_bit+result_width,source_width) - 1; lvalue->children.push_back(new AstNode(AST_RANGE, - mkconst_int(start_bit+result_width-1, true), mkconst_int(start_bit, true))); + mkconst_int(end_bit, true), mkconst_int(start_bit, true))); cond->children.push_back(new AstNode(AST_BLOCK, new AstNode(type, lvalue, children[1]->clone()))); newNode->children.push_back(cond); } -- 2.30.2