re PR c++/79672 (ICE with -Wduplicated-branches -fopenmp)

	PR c++/79672
	* tree.c (inchash::add_expr): Handle TREE_VEC.

	* g++.dg/warn/Wduplicated-branches2.C: Fix PR.
	* g++.dg/warn/Wduplicated-branches3.C: New test.

From-SVN: r245996

gcc/ChangeLog

+2017-03-09  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/79672
+	* tree.c (inchash::add_expr): Handle TREE_VEC.
+
 2017-03-09  Martin Liska  <mliska@suse.cz>
 
 	PR ipa/79764

gcc/testsuite/ChangeLog

+2017-03-09  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/79672
+	* g++.dg/warn/Wduplicated-branches2.C: Fix PR.
+	* g++.dg/warn/Wduplicated-branches3.C: New test.
+
 2017-03-09  Prachi Godbole  <prachi.godbole@imgtec.com>
 
 	* gcc.target/mips/msa-bclri.c: Skip the test for -O0.

gcc/testsuite/g++.dg/warn/Wduplicated-branches2.C

-// PR c/6427
+// PR c/64279
 // { dg-do compile { target c++11 } }
 // { dg-options "-Wduplicated-branches" }
 

gcc/testsuite/g++.dg/warn/Wduplicated-branches3.C

+// PR c++/79672
+// { dg-do compile }
+// { dg-options "-Wduplicated-branches -fopenmp" }
+// { dg-require-effective-target fopenmp }
+
+template<int N> void foo()
+{
+  if (N > 0)
+  {
+#pragma omp parallel for
+    for (int i = 0; i < 10; ++i) ;
+  }
+}
+
+void bar()
+{
+  foo<0>();
+}

gcc/tree.c

@@ -7865,6 +7865,10 @@ add_expr (const_tree t, inchash::hash &hstate, unsigned int flags)
 	  inchash::add_expr (tsi_stmt (i), hstate, flags);
 	return;
       }
+    case TREE_VEC:
+      for (int i = 0; i < TREE_VEC_LENGTH (t); ++i)
+	inchash::add_expr (TREE_VEC_ELT (t, i), hstate, flags);
+      return;
     case FUNCTION_DECL:
       /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
 	 Otherwise nodes that compare equal according to operand_equal_p might