Merge from gcc-7-branch.ARM/embedded-7-branch-2018q2ARM/embedded-7-branch

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/ARM/embedded-7-branch@261903 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 32 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/Walloc-size-larger-than-16.c b/gcc/testsuite/gcc.dg/Walloc-size-larger-than-16.c
new file mode 100644
index 00000000000..837b69a36d8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Walloc-size-larger-than-16.c
@@ -0,0 +1,32 @@
+/* PR middle-end/82063 - issues with arguments enabled by -Wall
+   { dg-do compile }
+   { dg-options "-O -Walloc-size-larger-than=1zb -ftrack-macro-expansion=0" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+void sink (void*);
+
+#define T(x) sink (x)
+
+/* Verify that an invalid -Walloc-size-larger-than argument is diagnosed
+   and rejected without changing the default setting of PTRDIFF_MAX.  */
+
+void f (void)
+{
+  size_t n = 0;
+  T (__builtin_malloc (n));
+
+  n = __PTRDIFF_MAX__;
+  T (__builtin_malloc (n));
+
+  n += 1;
+  T (__builtin_malloc (n));   /* { dg-warning "exceeds maximum object size" } */
+
+  n = __SIZE_MAX__ - 1;
+  T (__builtin_malloc (n));   /* { dg-warning "exceeds maximum object size" } */
+
+  n = __SIZE_MAX__;
+  T (__builtin_malloc (n));   /* { dg-warning "exceeds maximum object size" } */
+}
+
+/* { dg-warning "invalid argument .1zb. to .-Walloc-size-larger-than=." "" { target *-*-* } 0 } */