diff mbox

[C++] Fix build_noexcept_spec ICE (PR c++/54207)

Message ID 20121206143022.GI2315@tucnak.redhat.com
State New
Headers show

Commit Message

Jakub Jelinek Dec. 6, 2012, 2:30 p.m. UTC 
On Thu, Dec 06, 2012 at 09:07:43AM -0500, Jason Merrill wrote:
> These are the only two possibilities for a boolean INTEGER_CST, so
> let's assert that it's false if it isn't true.
> 
> You can then leave the 'else' on the "if (expr == error_mark_node)".
> 
> And here you don't need to check the value at all unless in an assert.

Ok, here is what I'm going to bootstrap/regtest then:

2012-12-06  Jakub Jelinek  <jakub@redhat.com>

	PR c++/54207
	* except.c (build_noexcept_spec): Avoid direct comparison
	with boolean_true_node or boolean_false_node, instead use
	operand_equal_p and/or INTEGER_CST check.
	* pt.c (tsubst_exception_specification): Likewise.
	* typeck2.c (merge_exception_specifiers): Likewise.

	* g++.dg/cpp0x/noexcept18.C: New test.


	Jakub

Comments

Jason Merrill Dec. 6, 2012, 3:08 p.m. UTC | #1 
OK.

Jason
diff mbox

Patch

--- gcc/cp/pt.c.jj	2012-12-04 14:17:26.829197995 +0100
+++ gcc/cp/pt.c	2012-12-06 15:26:07.574298792 +0100
@@ -10840,7 +10840,7 @@  tsubst_exception_specification (tree fnt
     {
       /* A noexcept-specifier.  */
       tree expr = TREE_PURPOSE (specs);
-      if (expr == boolean_true_node || expr == boolean_false_node)
+      if (TREE_CODE (expr) == INTEGER_CST)
 	new_specs = expr;
       else if (defer_ok)
 	{
--- gcc/cp/typeck2.c.jj	2012-12-04 14:17:26.882197630 +0100
+++ gcc/cp/typeck2.c	2012-12-06 15:16:28.091620326 +0100
@@ -1871,7 +1871,7 @@  merge_exception_specifiers (tree list, t
       /* If ADD is a deferred noexcept, we must have been called from
 	 process_subob_fn.  For implicitly declared functions, we build up
 	 a list of functions to consider at instantiation time.  */
-      if (noex == boolean_true_node)
+      if (operand_equal_p (noex, boolean_true_node, 0))
 	noex = NULL_TREE;
       gcc_assert (fn && (!noex || is_overloaded_fn (noex)));
       noex = build_overload (fn, noex);
--- gcc/cp/except.c.jj	2012-12-04 14:17:26.916197394 +0100
+++ gcc/cp/except.c	2012-12-06 15:23:46.169113297 +0100
@@ -1316,15 +1316,21 @@  build_noexcept_spec (tree expr, int comp
 						LOOKUP_NORMAL);
       expr = cxx_constant_value (expr);
     }
-  if (expr == boolean_true_node)
-    return noexcept_true_spec;
-  else if (expr == boolean_false_node)
-    return noexcept_false_spec;
+  if (TREE_CODE (expr) == INTEGER_CST)
+    {
+      if (operand_equal_p (expr, boolean_true_node, 0))
+	return noexcept_true_spec;
+      else
+	{
+	  gcc_checking_assert (operand_equal_p (expr, boolean_false_node, 0));
+	  return noexcept_false_spec;
+	}
+    }
   else if (expr == error_mark_node)
     return error_mark_node;
   else
     {
-      gcc_assert (processing_template_decl || expr == error_mark_node
+      gcc_assert (processing_template_decl
 		  || TREE_CODE (expr) == DEFERRED_NOEXCEPT);
       return build_tree_list (expr, NULL_TREE);
     }
--- gcc/testsuite/g++.dg/cpp0x/noexcept18.C.jj	2012-12-06 15:16:28.125619775 +0100
+++ gcc/testsuite/g++.dg/cpp0x/noexcept18.C	2012-12-06 15:16:28.125619775 +0100
@@ -0,0 +1,11 @@ 
+// PR c++/54207
+// { dg-do compile }
+// { dg-options "-std=c++11" }
+
+typedef bool B;
+constexpr B foo () { return true; }
+
+void
+bar () noexcept (foo ())
+{
+}