re PR ipa/90401 (Missed propagation of by-ref constant argument to callee function)

PR ipa/90401

gcc/ChangeLog:

	* ipa-prop.c (add_to_agg_contents_list): New function.
	(clobber_by_agg_contents_list_p): Likewise.
	(extract_mem_content): Likewise.
	(get_place_in_agg_contents_list): Delete.
	(determine_known_aggregate_parts): Renamed from
	determine_locally_known_aggregate_parts.  New parameter
	aa_walk_budget_p.

gcc/testsuite/ChangeLog:

	* gcc.dg/ipa/ipcp-agg-10.c: New test.

From-SVN: r272282

gcc/ChangeLog

+2019-06-14  Feng Xue  <fxue@os.amperecomputing.com>
+
+	PR ipa/90401
+	* ipa-prop.c (add_to_agg_contents_list): New function.
+	(clobber_by_agg_contents_list_p): Likewise.
+	(extract_mem_content): Likewise.
+	(get_place_in_agg_contents_list): Delete.
+	(determine_known_aggregate_parts): Renamed from
+	determine_locally_known_aggregate_parts.  New parameter
+	aa_walk_budget_p.
+
 2019-06-13  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/90662

gcc/testsuite/ChangeLog

+2019-06-14  Feng Xue  <fxue@os.amperecomputing.com>
+
+	PR ipa/90401
+	* gcc.dg/ipa/ipcp-agg-10.c: New test.
+
 2019-06-13  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/90662

gcc/testsuite/gcc.dg/ipa/ipcp-agg-10.c

+/* { dg-do compile } */
+/* { dg-options "-O3 -fdump-ipa-cp-details -fno-inline" } */
+
+int data1;
+
+int callee1(int *v)
+{
+  if (*v < 2)
+    return 0;
+  else 
+    {
+      int t = data1;
+
+      data1 = *v;
+      *v = t;
+
+      return 1;
+    }
+}
+
+int __attribute__((pure)) callee2(int *v)
+{
+  if (*v < 2)
+    return 0;
+  else 
+    {
+      data1 = v[0] + v[2];
+
+      return 1;
+    }
+}
+
+int caller1(int c, int *r)
+{
+  int a = 1;
+
+  if (c)
+    return callee1(&a);
+  else
+    {
+      *r = 2;
+      return callee1(r);
+    }
+}
+
+int data2[200];
+int data3;
+
+int __attribute__((const)) gen_cond(int);
+
+int caller2(void)
+{
+  int i, j;
+  int sum = 0;
+  int a[8];
+
+  a[0] = 3;
+  for (i = 0; i < 100; i++)
+    {
+      if (gen_cond (i))
+        continue;
+
+      a[2] = 4;
+      for (j = 0; j < 100; j++)
+        {
+          data2[i + j] = (i ^ j) + data3;
+
+          sum += callee2(a);
+        }
+    }
+
+  return sum;
+}
+
+/* { dg-final { scan-ipa-dump-times "offset: 0, cst: 1" 1 "cp" } } */
+/* { dg-final { scan-ipa-dump-times "offset: 0, cst: 2" 1 "cp" } } */
+/* { dg-final { scan-ipa-dump-times "offset: 0, cst: 3" 1 "cp" } } */
+/* { dg-final { scan-ipa-dump-times "offset: 64, cst: 4" 1 "cp" } } */