Check operands before invoking fold_range.

Call check_operands_p before fold_range to make sure it is a valid operation.

	PR tree-optimization/111922
	gcc/
	* ipa-cp.cc (ipa_vr_operation_and_type_effects): Check the
	operands are valid before calling fold_range.

	gcc/testsuite/
	* gcc.dg/pr111922.c: New.

diff --git a/gcc/ipa-cp.cc b/gcc/ipa-cp.cc
index 34fae065454beee13767d643788d8ffc01815b18..649ad53616119b2f7c30685fa00117478cb99d0e 100644 (file)
--- a/gcc/ipa-cp.cc
+++ b/gcc/ipa-cp.cc
@@ -1926,7 +1926,8 @@ ipa_vr_operation_and_type_effects (vrange &dst_vr,
   Value_Range varying (dst_type);
   varying.set_varying (dst_type);
 
-  return (handler.fold_range (dst_vr, dst_type, src_vr, varying)
+  return (handler.operand_check_p (dst_type, src_type, dst_type)
+         && handler.fold_range (dst_vr, dst_type, src_vr, varying)
          && !dst_vr.varying_p ()
          && !dst_vr.undefined_p ());
 }

diff --git a/gcc/testsuite/gcc.dg/pr111922.c b/gcc/testsuite/gcc.dg/pr111922.c
new file mode 100644 (file)
index 0000000..4f429d7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr111922.c
@@ -0,0 +1,29 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-tree-fre" } */
+
+void f2 (void);
+void f4 (int, int, int);
+struct A { int a; };
+struct B { struct A *b; int c; } v;
+
+static int
+f1 (x, y)
+  struct C *x;
+  struct A *y;
+{
+  (v.c = v.b->a) || (v.c = v.b->a);
+  f2 ();
+}
+
+static void
+f3 (int x, int y)
+{
+  int b = f1 (0, ~x);
+  f4 (0, 0, v.c);
+}
+
+void
+f5 (void)
+{
+  f3 (0, 0);
+}