c: ICE in gimplify_expr when counted_by for pointer is added [PR122982]

The first argument of the call to .ACCESS_WITH_SIZE includes
"c_maybe_const_expr" which should not be passed to gimplifier.

Before passing the expression as the first argument to the call to
.ACCESS_WITH_SIZE, c_fully_fold should be called on this expression.

	PR c/122982

gcc/c/ChangeLog:

	* c-typeck.cc (build_access_with_size_for_counted_by): Call
	c_fully_fold on the first parameter.

gcc/testsuite/ChangeLog:

	* gcc.dg/pointer-counted-by-pr122982.c: New test.

diff --git a/gcc/c/c-typeck.cc b/gcc/c/c-typeck.cc
index d7c9a324d7ae81faf9498a2578a6bb0ceb873430..735cfc61d1e0ec0830e098dee4f429e001ff1240 100644 (file)
--- a/gcc/c/c-typeck.cc
+++ b/gcc/c/c-typeck.cc
@@ -3187,7 +3187,7 @@ build_access_with_size_for_counted_by (location_t loc, tree ref,
   tree first_param = is_fam
                     ? c_fully_fold (array_to_pointer_conversion (loc, ref),
                                     false, NULL)
-                    : ref;
+                    : c_fully_fold (ref, false, NULL);
   tree second_param
     = c_fully_fold (counted_by_ref, false, NULL);
   tree third_param = build_int_cst (c_build_pointer_type (counted_by_type), 0);

diff --git a/gcc/testsuite/gcc.dg/pointer-counted-by-pr122982.c b/gcc/testsuite/gcc.dg/pointer-counted-by-pr122982.c
new file mode 100644 (file)
index 0000000..1bad7f0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pointer-counted-by-pr122982.c
@@ -0,0 +1,19 @@
+/* PR c/122982 */ 
+/* { dg-do compile } */
+/* { dg-options "-O0" } */
+
+int* f (int);
+
+struct __bounded_ptr {
+ int k;
+ int *buf __attribute__ ((counted_by (k)));
+};
+
+int*
+f1 (int n) { return f (n); }
+
+void h1 (void)
+{ 
+  int *p = (struct __bounded_ptr) {3, f1 (3)}.buf;
+  __builtin_memset (p, 0, 3 * sizeof p);
+}