re PR ipa/59882 (internal compiler error: Segmentation fault)

	PR ipa/59882
	* tree.c (get_binfo_at_offset): Do not get confused by empty classes;
	* g++.dg/torture/pr59882.C: New testcase

From-SVN: r207451

gcc/ChangeLog

-2014-02-03  Jan Hubicka  <jh@suse.cz>
+2014-02-03  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/59882
+	* tree.c (get_binfo_at_offset): Do not get confused by empty classes;
+
+2014-02-03  Jan Hubicka  <hubicka@ucw.cz>
 
 	* gimple-fold.c (gimple_extract_devirt_binfo_from_cst): Remove.
 	* gimple-fold.h (gimple_extract_devirt_binfo_from_cst): Remove.
 
-2014-02-03  Jan Hubicka  <jh@suse.cz>
+2014-02-03  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/59831
 	* ipa-cp.c (ipa_get_indirect_edge_target_1): Use ipa-devirt
@@ -14,7 +19,7 @@
 	(get_polymorphic_call_info): ... here.
 	(get_polymorphic_call_info_from_invariant): New function.
 
-2014-02-03  Jan Hubicka  <jh@suse.cz>
+2014-02-03  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-cp.c (ipa_get_indirect_edge_target_1): Do direct
 	lookup via vtable pointer; check for type consistency
@@ -152,7 +157,7 @@
 	(reduc_splus_<mode>): Call gen_altivec_vsumsws_direct instead of
 	gen_altivec_vsumsws.
 
-2014-02-02  Jan Hubicka  <jh@suse.cz>
+2014-02-02  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-devirt.c (subbinfo_with_vtable_at_offset,
 	vtable_pointer_value_to_binfo): New functions.
@@ -479,7 +484,7 @@
 	if -minrt given.
 	(ENDFILE_SPEC): Likewise.
 
-2014-01-29  Jan Hubicka  <jh@suse.cz>
+2014-01-29  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-inline-analysis.c (clobber_only_eh_bb_p): New function.
 	(estimate_function_body_sizes): Use it.
@@ -1234,12 +1239,12 @@
 
 	* config/microblaze/microblaze.md: Correct bswaphi2 insn.
 
-2014-01-22  Jan Hubicka  <jh@suse.cz>
+2014-01-22  Jan Hubicka  <hubicka@ucw.cz>
 
 	* config/i386/x86-tune.def (X86_TUNE_ACCUMULATE_OUTGOING_ARGS):
 	Enable for generic and recent AMD targets.
 
-2014-01-22  Jan Hubicka  <jh@suse.cz>
+2014-01-22  Jan Hubicka  <hubicka@ucw.cz>
 
 	* combine-stack-adj.c (combine_stack_adjustments_for_block): Remove
 	ARG_SIZE note when adjustment was eliminated.
@@ -1404,7 +1409,7 @@
 	* config/i386/i386.c (ix86_avoid_lea_for_addr): Return false
 	if operands[1] is a REG or ZERO_EXTEND of a REG.
 
-2014-01-19  Jan Hubicka  <jh@suse.cz>
+2014-01-19  Jan Hubicka  <hubicka@ucw.cz>
 
 	* varasm.c (compute_reloc_for_constant): Use targetm.binds_local_p.
 
@@ -1481,7 +1486,7 @@
 	* ree.c (combine_set_extension): Temporarily disable test for
 	changing number of hard registers.
 
-2014-01-17  Jan Hubicka  <jh@suse.cz>
+2014-01-17  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR middle-end/58125
 	* ipa-inline-analysis.c (inline_free_summary):
@@ -1658,7 +1663,7 @@
 	* ipa-ref.c (ipa_remove_stmt_references): Fix references
 	traversal when removing references.
 
-2014-01-16  Jan Hubicka  <jh@suse.cz>
+2014-01-16  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/59775
 	* tree.c (get_binfo_at_offset): Look harder for virtual bases.
@@ -2070,7 +2075,7 @@
 	occurs before the extension when optimizing extensions with
 	different source and destination hard registers.
 
-2014-01-10  Jan Hubicka  <jh@suse.cz>
+2014-01-10  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/58585
 	* ipa-devirt.c (build_type_inheritance_graph): Also add types of

gcc/testsuite/ChangeLog

+2014-02-03  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/59882
+	* g++.dg/torture/pr59882.C: New testcase
+
 2014-02-03  Jan Hubicka  <jh@suse.cz>
 
 	PR ipa/59831

gcc/testsuite/g++.dg/torture/pr59882.C

+/* { dg-do compile } */
+class A;
+class B {};
+struct C {
+  virtual void dispatch();
+  int traversal_map_;
+};
+template <typename> class F : public virtual C {};
+
+struct I : F<A>, F<int> {};
+struct J : B, I {};
+class D {};
+struct L {
+  L(D &, int &p2) : map_(p2) {}
+  virtual void traverse(int &p1) {
+    int &s = p1;
+    names<L>(s, names_);
+  }
+  int &map_;
+  J names_;
+  template <typename> void names(int &, C &p2) { p2.dispatch(); }
+};
+
+struct G : D {
+  G(D &, int &p2) : map_(p2) { L(*this, map_); }
+  int &map_;
+};
+
+int a;
+void fn1(D &p1) { G(p1, a); }

gcc/tree.c

@@ -12005,10 +12005,15 @@ get_binfo_at_offset (tree binfo, HOST_WIDE_INT offset, tree expected_type)
 		    break;
 		  }
 		else
-		  if (BINFO_OFFSET (base_binfo) - BINFO_OFFSET (binfo) < pos
+		  if ((tree_to_shwi (BINFO_OFFSET (base_binfo)) 
+		       - tree_to_shwi (BINFO_OFFSET (binfo)))
+		      * BITS_PER_UNIT < pos
+		      /* Rule out types with no virtual methods or we can get confused
+			 here by zero sized bases.  */
+		      && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (base_binfo)))
 		      && (!containing_binfo
-			  || (BINFO_OFFSET (containing_binfo)
-			      < BINFO_OFFSET (base_binfo))))
+			  || (tree_to_shwi (BINFO_OFFSET (containing_binfo))
+			      < tree_to_shwi (BINFO_OFFSET (base_binfo)))))
 		    containing_binfo = base_binfo;
 	      if (found_binfo)
 		{