From 29289cbb4fb0bf5c8424519bf97220205f892151 Mon Sep 17 00:00:00 2001
From: Tristan Gingold <tgingold@free.fr>
Date: Sat, 5 Feb 2022 17:05:38 +0100
Subject: testsuite/synth: add a test for #1962

---
 testsuite/synth/issue1962/bug.vhdl     | 48 ++++++++++++++++++++++++++++++++++
 testsuite/synth/issue1962/bug2.vhdl    | 44 +++++++++++++++++++++++++++++++
 testsuite/synth/issue1962/testsuite.sh |  9 +++++++
 3 files changed, 101 insertions(+)
 create mode 100644 testsuite/synth/issue1962/bug.vhdl
 create mode 100644 testsuite/synth/issue1962/bug2.vhdl
 create mode 100755 testsuite/synth/issue1962/testsuite.sh

diff --git a/testsuite/synth/issue1962/bug.vhdl b/testsuite/synth/issue1962/bug.vhdl
new file mode 100644
index 000000000..739d9c0ee
--- /dev/null
+++ b/testsuite/synth/issue1962/bug.vhdl
@@ -0,0 +1,48 @@
+library IEEE;
+use IEEE.std_logic_1164.all;
+use IEEE.numeric_std.all;
+
+entity bug is
+	port (
+		clk : in std_ulogic
+	);
+end bug;
+
+architecture struct of bug is
+
+	type data_t is record
+		value : natural;
+	end record;
+
+	type offset_array_t is array(natural range<>) of natural;
+	type data_array_t is array(natural range<>) of data_t;
+
+	type collection_t is record
+		offset : offset_array_t;
+		data   : data_array_t;
+	end record;
+
+	-- This results in an error
+	function append(prefix : collection_t; data : data_array_t) return collection_t is
+	begin
+		return (offset => prefix.offset & prefix.data'length, 
+		        data   => prefix.data   & data);
+	end function;
+
+	-- This works as a workaround
+	function append2(prefix : collection_t; data : data_array_t) return collection_t is
+		variable ret : collection_t(offset(0 to prefix.offset'length), data(0 to prefix.data'length+data'length-1));
+	begin
+		ret := (offset => prefix.offset & prefix.data'length, 
+		        data   => prefix.data   & data);
+		return ret;
+	end function;
+
+	--intentional null ranges for the initial value
+	constant initial_collection : collection_t(offset(0 to -1), data(0 to -1)) := (offset => (others => 0), data => (others => (value => 0)));
+	constant new_data : data_array_t(0 to 2) := (others => (value => 0));
+
+	constant final_collection : collection_t := append(initial_collection, new_data);
+begin
+	
+end architecture;
diff --git a/testsuite/synth/issue1962/bug2.vhdl b/testsuite/synth/issue1962/bug2.vhdl
new file mode 100644
index 000000000..b597fb89b
--- /dev/null
+++ b/testsuite/synth/issue1962/bug2.vhdl
@@ -0,0 +1,44 @@
+entity bug is
+	port (
+		clk : in bit
+	);
+end bug;
+
+architecture struct of bug is
+
+	type data_t is record
+		value : natural;
+	end record;
+
+	type offset_array_t is array(natural range<>) of natural;
+	type data_array_t is array(natural range<>) of data_t;
+
+	type collection_t is record
+		offset : offset_array_t;
+		data   : data_array_t;
+	end record;
+
+	-- This results in an error
+	function append(prefix : collection_t; data : data_array_t) return collection_t is
+	begin
+		return (offset => prefix.offset & prefix.data'length, 
+		        data   => prefix.data   & data);
+	end function;
+
+	-- This works as a workaround
+	function append2(prefix : collection_t; data : data_array_t) return collection_t is
+		variable ret : collection_t(offset(0 to prefix.offset'length), data(0 to prefix.data'length+data'length-1));
+	begin
+		ret := (offset => prefix.offset & prefix.data'length, 
+		        data   => prefix.data   & data);
+		return ret;
+	end function;
+
+	--intentional null ranges for the initial value
+	constant initial_collection : collection_t(offset(0 to -1), data(0 to -1)) := (offset => (others => 0), data => (others => (value => 0)));
+	constant new_data : data_array_t(0 to 2) := (others => (value => 0));
+
+	constant final_collection : collection_t := append(initial_collection, new_data);
+begin
+	
+end architecture;
diff --git a/testsuite/synth/issue1962/testsuite.sh b/testsuite/synth/issue1962/testsuite.sh
new file mode 100755
index 000000000..a27251178
--- /dev/null
+++ b/testsuite/synth/issue1962/testsuite.sh
@@ -0,0 +1,9 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+GHDL_STD_FLAGS=--std=08
+synth_only bug
+synth_only bug2
+
+echo "Test successful"
-- 
cgit v1.2.3