[PATCH] cgraph: Handle BUILT_IN_UNREACHABLE_TRAP like BUILT_IN_UNREACHABLE in more spots [PR106258]

[Jakub Jelinek <jakub@redhat.com>]

Hi!

The following testcase ICEs because we still have some spots that
treat BUILT_IN_UNREACHABLE specially but not BUILT_IN_UNREACHABLE_TRAP
the same.

The following patch fixes that, bootstrapped/regtested on x86_64-linux and
i686-linux, ok for trunk?

2023-02-22  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/106258
	* cgraph.cc (cgraph_edge::redirect_call_stmt_to_callee,
	cgraph_update_edges_for_call_stmt_node, cgraph_node::verify_node):
	Handle BUILT_IN_UNREACHABLE_TRAP like BUILT_IN_UNREACHABLE.
	* cgraphclones.cc (cgraph_node::create_clone): Likewise.

	* g++.dg/ipa/pr106258.C: New test.

--- gcc/cgraph.cc.jj	2023-02-07 10:33:46.027107080 +0100
+++ gcc/cgraph.cc	2023-02-21 14:57:10.405454504 +0100
@@ -1548,7 +1548,8 @@ cgraph_edge::redirect_call_stmt_to_calle
   else
     {
       if (flag_checking
-	  && !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE))
+	  && !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
+	  && !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE_TRAP))
 	ipa_verify_edge_has_no_modifications (e);
       new_stmt = e->call_stmt;
       gimple_call_set_fndecl (new_stmt, e->callee->decl);
@@ -1634,7 +1635,9 @@ cgraph_update_edges_for_call_stmt_node (
 	{
 	  /* Keep calls marked as dead dead.  */
 	  if (new_stmt && is_gimple_call (new_stmt) && e->callee
-	      && fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE))
+	      && (fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
+		  || fndecl_built_in_p (e->callee->decl,
+					BUILT_IN_UNREACHABLE_TRAP)))
 	    {
 	      cgraph_edge::set_call_stmt (node->get_edge (old_stmt),
 					  as_a <gcall *> (new_stmt));
@@ -3598,7 +3601,9 @@ cgraph_node::verify_node (void)
 	  /* Optimized out calls are redirected to __builtin_unreachable.  */
 	  && (e->count.nonzero_p ()
 	      || ! e->callee->decl
-	      || !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE))
+	      || !(fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
+		   || fndecl_built_in_p (e->callee->decl,
+					 BUILT_IN_UNREACHABLE_TRAP)))
 	  && count
 	      == ENTRY_BLOCK_PTR_FOR_FN (DECL_STRUCT_FUNCTION (decl))->count
 	  && (!e->count.ipa_p ()
--- gcc/cgraphclones.cc.jj	2023-01-02 09:32:44.706962765 +0100
+++ gcc/cgraphclones.cc	2023-02-21 14:58:11.619568895 +0100
@@ -425,7 +425,9 @@ cgraph_node::create_clone (tree new_decl
 	 version.  The only exception is when the edge was proved to
 	 be unreachable during the cloning procedure.  */
       if (!e->callee
-	  || !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE))
+	  || !(fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
+	       || fndecl_built_in_p (e->callee->decl,
+				     BUILT_IN_UNREACHABLE_TRAP)))
         e->redirect_callee_duplicating_thunks (new_node);
     }
   new_node->expand_all_artificial_thunks ();
--- gcc/testsuite/g++.dg/ipa/pr106258.C.jj	2023-02-21 15:02:17.251015237 +0100
+++ gcc/testsuite/g++.dg/ipa/pr106258.C	2023-02-21 15:02:12.255087511 +0100
@@ -0,0 +1,5 @@
+// PR middle-end/106258
+// { dg-do compile { target c++11 } }
+// { dg-options "-O2 -funreachable-traps" }
+
+#include "ipa-sra-4.C"

	Jakub