One more also for GCC 5 branch.
Martin
>From 6853238cc8103fefb8b8acc8f56d444860495714 Mon Sep 17 00:00:00 2001
From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 11 Aug 2017 10:01:13 +0000
Subject: [PATCH] Backport r251049
gcc/ChangeLog:
2017-08-11 Martin Liska <mli...@suse.cz>
PR tree-opt/79987
* tree-chkp.c (chkp_get_bounds_for_decl_addr): Do not instrument
variables of void type.
gcc/testsuite/ChangeLog:
2017-08-11 Martin Liska <mli...@suse.cz>
PR tree-opt/79987
* gcc.target/i386/mpx/pr79987.c: New test.
---
gcc/testsuite/gcc.target/i386/mpx/pr79987.c | 5 +++++
gcc/tree-chkp.c | 3 +++
2 files changed, 8 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/i386/mpx/pr79987.c
diff --git a/gcc/testsuite/gcc.target/i386/mpx/pr79987.c b/gcc/testsuite/gcc.target/i386/mpx/pr79987.c
new file mode 100644
index 00000000000..b3ebda95694
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mpx/pr79987.c
@@ -0,0 +1,5 @@
+/* { dg-do compile } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx" } */
+
+extern void foo;
+void *bar = &foo; /* { dg-warning "taking address of expression of type .void." } */
diff --git a/gcc/tree-chkp.c b/gcc/tree-chkp.c
index 2901e8b354d..28dac22add6 100644
--- a/gcc/tree-chkp.c
+++ b/gcc/tree-chkp.c
@@ -3144,6 +3144,9 @@ chkp_get_bounds_for_decl_addr (tree decl)
&& !flag_chkp_incomplete_type)
return chkp_get_zero_bounds ();
+ if (VOID_TYPE_P (TREE_TYPE (decl)))
+ return chkp_get_zero_bounds ();
+
if (flag_chkp_use_static_bounds
&& TREE_CODE (decl) == VAR_DECL
&& (TREE_STATIC (decl)
--
2.14.1
