From: Martin Liska <mliska@suse.cz>
Date: Fri, 11 Aug 2017 10:01:13 +0000 (+0200)
Subject: Do not instrument void variables with MPX (PR tree-opt/79987).
X-Git-Tag: basepoints/gcc-9~5476
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fe8a99d8cdcfacf14b603b99a7730d18ce0ccd1f;p=thirdparty%2Fgcc.git

Do not instrument void variables with MPX (PR tree-opt/79987).

2017-08-11  Martin Liska  <mliska@suse.cz>

	PR tree-opt/79987
	* tree-chkp.c (chkp_get_bounds_for_decl_addr): Do not instrument
	variables of void type.
2017-08-11  Martin Liska  <mliska@suse.cz>

	PR tree-opt/79987
	* gcc.target/i386/mpx/pr79987.c: New test.

From-SVN: r251049
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a926516ed778..9be7f17931cd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2017-08-11  Martin Liska  <mliska@suse.cz>
+
+	PR tree-opt/79987
+	* tree-chkp.c (chkp_get_bounds_for_decl_addr): Do not instrument
+	variables of void type.
+
 2017-08-11  Martin Liska  <mliska@suse.cz>
 
 	* asan.c (asan_protect_global): Replace ASM_OUTPUT_DEF with
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 76c07405a0de..80ee13eaaa0f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-08-11  Martin Liska  <mliska@suse.cz>
+
+	PR tree-opt/79987
+	* gcc.target/i386/mpx/pr79987.c: New test.
+
 2017-08-11  Martin Liska  <mliska@suse.cz>
 
 	PR ipa/81213
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 000000000000..b3ebda956945
--- /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 12af458fb90d..951aec10b3ad 100644
--- a/gcc/tree-chkp.c
+++ b/gcc/tree-chkp.c
@@ -3197,6 +3197,9 @@ 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
       && VAR_P (decl)
       && (TREE_STATIC (decl)