[gcc r13-4557] Ensure arguments to range-op handler are supported.

[gcc r13-4557] Ensure arguments to range-op handler are supported.

[Andrew Macleod]

https://gcc.gnu.org/g:0ef9991d8767932f51fa97753c16058d17b29b18

commit r13-4557-g0ef9991d8767932f51fa97753c16058d17b29b18
Author: Andrew MacLeod <amacleod@redhat.com>
Date:   Tue Dec 6 10:41:29 2022 -0500

    Ensure arguments to range-op handler are supported.
    
            PR tree-optimization/107985
            gcc/
            * gimple-range-op.cc
            (gimple_range_op_handler::gimple_range_op_handler): Check if type
            of the operands is supported.
            * gimple-range.cc (gimple_ranger::prefill_stmt_dependencies): Do
            not assert if here is no range-op handler.
    
            gcc/testsuite/
            * g++.dg/pr107985.C: New.

Diff:
---
 gcc/gimple-range-op.cc          |  6 ++++++
 gcc/gimple-range.cc             | 24 +++++++++++++-----------
 gcc/testsuite/g++.dg/pr107985.C | 18 ++++++++++++++++++
 3 files changed, 37 insertions(+), 11 deletions(-)

diff --git a/gcc/gimple-range-op.cc b/gcc/gimple-range-op.cc
index 7764166d5fb..12068544bc5 100644
--- a/gcc/gimple-range-op.cc
+++ b/gcc/gimple-range-op.cc
@@ -148,6 +148,9 @@ gimple_range_op_handler::gimple_range_op_handler (gimple *s)
 	case GIMPLE_COND:
 	  m_op1 = gimple_cond_lhs (m_stmt);
 	  m_op2 = gimple_cond_rhs (m_stmt);
+	  // Check that operands are supported types.  One check is enough.
+	  if (!Value_Range::supports_type_p (TREE_TYPE (m_op1)))
+	    m_valid = false;
 	  return;
 	case GIMPLE_ASSIGN:
 	  m_op1 = gimple_range_base_of_assignment (m_stmt);
@@ -164,6 +167,9 @@ gimple_range_op_handler::gimple_range_op_handler (gimple *s)
 	    }
 	  if (gimple_num_ops (m_stmt) >= 3)
 	    m_op2 = gimple_assign_rhs2 (m_stmt);
+	  // Check that operands are supported types.  One check is enough.
+	  if ((m_op1 && !Value_Range::supports_type_p (TREE_TYPE (m_op1))))
+	    m_valid = false;
 	  return;
 	default:
 	  gcc_unreachable ();
diff --git a/gcc/gimple-range.cc b/gcc/gimple-range.cc
index ecd6039e0fd..8c055826e17 100644
--- a/gcc/gimple-range.cc
+++ b/gcc/gimple-range.cc
@@ -422,18 +422,20 @@ gimple_ranger::prefill_stmt_dependencies (tree ssa)
       else
 	{
 	  gimple_range_op_handler handler (stmt);
-	  gcc_checking_assert (handler);
-	  tree op = handler.operand2 ();
-	  if (op)
+	  if (handler)
 	    {
-	      Value_Range r (TREE_TYPE (op));
-	      prefill_name (r, op);
-	    }
-	  op = handler.operand1 ();
-	  if (op)
-	    {
-	      Value_Range r (TREE_TYPE (op));
-	      prefill_name (r, op);
+	      tree op = handler.operand2 ();
+	      if (op)
+		{
+		  Value_Range r (TREE_TYPE (op));
+		  prefill_name (r, op);
+		}
+	      op = handler.operand1 ();
+	      if (op)
+		{
+		  Value_Range r (TREE_TYPE (op));
+		  prefill_name (r, op);
+		}
 	    }
 	}
     }
diff --git a/gcc/testsuite/g++.dg/pr107985.C b/gcc/testsuite/g++.dg/pr107985.C
new file mode 100644
index 00000000000..8d244b54efb
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr107985.C
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -ftree-vrp -fno-tree-ccp -fno-tree-forwprop -fno-tree-fre" } */
+
+struct B {
+  int f;
+};
+
+struct D : public B {
+};
+
+void foo() {
+  D d;
+  d.f = 7;
+
+  int B::* pfb = &B::f;
+  int D::* pfd = pfb;
+  int v = d.*pfd;
+}