re PR tree-optimization/65258 (Wrong array bounds warning)

2017-12-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/65258
	* gcc.dg/Warray-bounds-23.c: New testcase.

From-SVN: r255641

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index bc9fa99..981c3a2 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-12-14  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/65258
+       * gcc.dg/Warray-bounds-23.c: New testcase.
+
 2017-12-14  Tom de Vries  <tom@codesourcery.com>
 
        * lib/target-supports.exp (check_effective_target_weak_undefined): New

diff --git a/gcc/testsuite/gcc.dg/Warray-bounds-23.c b/gcc/testsuite/gcc.dg/Warray-bounds-23.c
new file mode 100644 (file)
index 0000000..2addc35
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Warray-bounds-23.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -Warray-bounds" } */
+
+int main()
+{
+  unsigned i, j, a[10] = {0};
+
+  for (j = 23; j < 25; j++){
+      for (i = j / 8; i --> 0;) a[i] = 0; /* { dg-bogus "array bounds" } */
+      for (i =     1; i --> 0;) __builtin_printf("%u", a[i]);
+  }
+
+  return 0;
+}
+