[src/trunk]: src test/lint: demonstrate wrong warnings for 128-bit shifts

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ab193a59c3d8
branches:  trunk
changeset: 1022112:ab193a59c3d8
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Jul 04 20:22:31 2021 +0000

description:
test/lint: demonstrate wrong warnings for 128-bit shifts

diffstat:

 distrib/sets/lists/tests/mi               |   4 +++-
 tests/usr.bin/xlint/lint1/Makefile        |   4 +++-
 tests/usr.bin/xlint/lint1/op_shl_lp64.c   |  18 ++++++++++++++++++
 tests/usr.bin/xlint/lint1/op_shl_lp64.exp |   2 ++
 4 files changed, 26 insertions(+), 2 deletions(-)

diffs (64 lines):

diff -r 1749829678c1 -r ab193a59c3d8 distrib/sets/lists/tests/mi
--- a/distrib/sets/lists/tests/mi       Sun Jul 04 17:32:24 2021 +0000
+++ b/distrib/sets/lists/tests/mi       Sun Jul 04 20:22:31 2021 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.1075 2021/07/04 13:14:53 rillig Exp $
+# $NetBSD: mi,v 1.1076 2021/07/04 20:22:31 rillig Exp $
 #
 # Note: don't delete entries from here - mark them as "obsolete" instead.
 #
@@ -6941,6 +6941,8 @@
 ./usr/tests/usr.bin/xlint/lint1/msg_345.exp                    tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/xlint/lint1/op_colon.c                     tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/xlint/lint1/op_colon.exp                   tests-usr.bin-tests     compattestfile,atf
+./usr/tests/usr.bin/xlint/lint1/op_shl_lp64.c                  tests-usr.bin-tests     compattestfile,atf
+./usr/tests/usr.bin/xlint/lint1/op_shl_lp64.exp                        tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/xlint/lint1/stmt_for.c                     tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/xlint/lint1/stmt_for.exp                   tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/xlint/lint1/t_integration                  tests-usr.bin-tests     compattestfile,atf
diff -r 1749829678c1 -r ab193a59c3d8 tests/usr.bin/xlint/lint1/Makefile
--- a/tests/usr.bin/xlint/lint1/Makefile        Sun Jul 04 17:32:24 2021 +0000
+++ b/tests/usr.bin/xlint/lint1/Makefile        Sun Jul 04 20:22:31 2021 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.78 2021/07/04 13:14:54 rillig Exp $
+# $NetBSD: Makefile,v 1.79 2021/07/04 20:22:31 rillig Exp $
 
 NOMAN=         # defined
 MAX_MESSAGE=   345             # see lint1/err.c
@@ -151,6 +151,8 @@
 FILES+=                msg_259_ilp32.exp
 FILES+=                op_colon.c
 FILES+=                op_colon.exp
+FILES+=                op_shl_lp64.c
+FILES+=                op_shl_lp64.exp
 FILES+=                stmt_for.c
 FILES+=                stmt_for.exp
 
diff -r 1749829678c1 -r ab193a59c3d8 tests/usr.bin/xlint/lint1/op_shl_lp64.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/usr.bin/xlint/lint1/op_shl_lp64.c   Sun Jul 04 20:22:31 2021 +0000
@@ -0,0 +1,18 @@
+/*     $NetBSD: op_shl_lp64.c,v 1.1 2021/07/04 20:22:31 rillig Exp $   */
+# 3 "op_shl_lp64.c"
+
+/*
+ * Test overflow on shl of 128-bit integers, as seen in
+ * ecp_nistp256.c(296).
+ */
+
+/* lint1-only-if lp64 */
+
+const __uint128_t zero105 =
+    /* FIXME: 105 is ok for __uint128_t */
+    /* expect+1: warning: shift amount 105 is greater than bit-size 32 of 'int' [122] */
+    (((__uint128_t)1) << 105)
+    /* FIXME: 41 is ok for __uint128_t */
+    /* expect+1: warning: shift amount 41 is greater than bit-size 32 of 'int' [122] */
+    - (((__uint128_t)1) << 41)
+    - (((__uint128_t)1) << 9);
diff -r 1749829678c1 -r ab193a59c3d8 tests/usr.bin/xlint/lint1/op_shl_lp64.exp
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/usr.bin/xlint/lint1/op_shl_lp64.exp Sun Jul 04 20:22:31 2021 +0000
@@ -0,0 +1,2 @@
+op_shl_lp64.c(14): warning: shift amount 105 is greater than bit-size 32 of 'int' [122]
+op_shl_lp64.c(17): warning: shift amount 41 is greater than bit-size 32 of 'int' [122]