re PR middle-end/85496 (internal compiler error: in emit_move_insn, at expr.c:3722)

	PR middle-end/85496
	* expr.c (store_field): In the bitfield case, if the value comes from
	a function call and is returned in registers by means of a PARALLEL,
	do not change the mode of the temporary unless BLKmode and VOIDmode.

From-SVN: r259574

gcc/ChangeLog

-2018-04-23  Andrey Belevantsev  <abel@ispras.ru>
+2018-04-23  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR middle-end/85496
+	* expr.c (store_field): In the bitfield case, if the value comes from
+	a function call and is returned in registers by means of a PARALLEL,
+	do not change the mode of the temporary unless BLKmode and VOIDmode.
 
-        PR rtl-optimization/85423
+2018-04-23  Andrey Belevantsev  <abel@ispras.ru>
 
-        * sel-sched-ir.c (has_dependence_note_mem_dep): Only discard
-        dependencies to debug insns when the previous insn is non-debug.
+	PR rtl-optimization/85423
+	* sel-sched-ir.c (has_dependence_note_mem_dep): Only discard
+	dependencies to debug insns when the previous insn is non-debug.
 
 2018-04-23  Claudiu Zissulescu  <claziss@synopsys.com>
 

gcc/expr.c

@@ -6989,8 +6989,9 @@ store_field (rtx target, poly_int64 bitsize, poly_int64 bitpos,
       if (GET_CODE (temp) == PARALLEL)
 	{
 	  HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (exp));
-	  scalar_int_mode temp_mode
-	    = smallest_int_mode_for_size (size * BITS_PER_UNIT);
+	  machine_mode temp_mode = GET_MODE (temp);
+	  if (temp_mode == BLKmode || temp_mode == VOIDmode)
+	    temp_mode = smallest_int_mode_for_size (size * BITS_PER_UNIT);
 	  rtx temp_target = gen_reg_rtx (temp_mode);
 	  emit_group_store (temp_target, temp, TREE_TYPE (exp), size);
 	  temp = temp_target;

gcc/testsuite/ChangeLog

+2018-04-23  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* g++.dg/torture/pr85496.C: New test.
+
 2018-04-23  Andrey Belevantsev  <abel@ispras.ru>
 
-        PR rtl-optimization/85423
-        * gcc.dg/pr85423.c: New test.
+	PR rtl-optimization/85423
+	* gcc.dg/pr85423.c: New test.
 
 2018-04-20  Martin Sebor  <msebor@redhat.com>
 

gcc/testsuite/g++.dg/torture/pr85496.C

+// PR middle-end/85496
+// Reported by Marek Polacek <mpolacek@gcc.gnu.org>
+
+template <typename> class complex;
+template <typename _Tp> complex<_Tp> operator*(complex<_Tp>, complex<_Tp>);
+template <> struct complex<float> { _Complex float _M_value; };
+class A {
+  complex<float> _f0, _f1;
+
+public:
+  complex<float> &m_fn1() { return _f1; }
+};
+complex<float> a;
+void cos() {
+  A b;
+  complex<float> c;
+  b.m_fn1() = c * a;
+}