re PR target/80019 (ICE in ix86_vector_duplicate_value, at config/i386/i386.c:42584)

	PR target/80019
	* config/i386/i386.c (ix86_vector_duplicate_value): Create
	subreg of inner mode for values already in registers.

testsuite/ChangeLog:

	PR target/80019
	* gcc.target/i386/pr80019.c: New test.

From-SVN: r246161

gcc/ChangeLog

+2017-03-15  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/80019
+	* config/i386/i386.c (ix86_vector_duplicate_value): Create
+	subreg of inner mode for values already in registers.
+
 2017-03-15  Bernd Schmidt  <bschmidt@redhat.com>
 
 	* config/c6x/c6x.c (hwloop_optimize): Handle case where the old

gcc/config/i386/i386.c

@@ -42571,10 +42571,16 @@ ix86_vector_duplicate_value (machine_mode mode, rtx target, rtx val)
   if (recog_memoized (insn) < 0)
     {
       rtx_insn *seq;
+      machine_mode innermode = GET_MODE_INNER (mode);
+      rtx reg;
+
       /* If that fails, force VAL into a register.  */
 
       start_sequence ();
-      XEXP (dup, 0) = force_reg (GET_MODE_INNER (mode), val);
+      reg = force_reg (innermode, val);
+      if (GET_MODE (reg) != innermode)
+	reg = gen_lowpart (innermode, reg);
+      XEXP (dup, 0) = reg;
       seq = get_insns ();
       end_sequence ();
       if (seq)

gcc/testsuite/ChangeLog

+2017-03-15  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/80019
+	* gcc.target/i386/pr80019.c: New test.
+
 2017-03-15  Martin Liska  <mliska@suse.cz>
 
 	* gcc.dg/tree-prof/pr66295.c: Removed unused dg-error.

gcc/testsuite/gcc.target/i386/pr80019.c

+/* PR target/80019 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -mxop -mavx2" } */
+
+typedef char v16qi __attribute__ ((vector_size (16)));
+
+extern v16qi b, c;
+
+void
+foo (int e)
+{
+  b = c << e;
+}