re PR debug/84252 (ICE in get_tracked_reg_offset when building libvpx for aarch64)

	PR debug/84252
	* var-tracking.c (vt_add_function_parameter): Punt for non-onepart
	PARALLEL incoming that failed vt_get_decl_and_offset check.

	* gcc.target/aarch64/pr84252.c: New test.

From-SVN: r257514

gcc/ChangeLog

 2018-02-09  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/84252
+	* var-tracking.c (vt_add_function_parameter): Punt for non-onepart
+	PARALLEL incoming that failed vt_get_decl_and_offset check.
+
 	PR middle-end/84237
 	* output.h (bss_initializer_p): Add NAMED argument, defaulted to false.
 	* varasm.c (bss_initializer_p): Add NAMED argument, if true, ignore

gcc/testsuite/ChangeLog

 2018-02-09  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/84252
+	* gcc.target/aarch64/pr84252.c: New test.
+
 	PR middle-end/84237
 	* gcc.dg/pr84237.c: New test.
 

gcc/testsuite/gcc.target/aarch64/pr84252.c

+/* PR debug/84252 */
+/* { dg-do compile } */
+/* { dg-options "-g -O2" } */
+
+struct S { __Int32x4_t b[2]; };
+
+void
+foo (struct S x)
+{
+}

gcc/var-tracking.c

@@ -9653,6 +9653,7 @@ vt_add_function_parameter (tree parm)
   poly_int64 offset;
   dataflow_set *out;
   decl_or_value dv;
+  bool incoming_ok = true;
 
   if (TREE_CODE (parm) != PARM_DECL)
     return;
@@ -9743,6 +9744,7 @@ vt_add_function_parameter (tree parm)
 
   if (!vt_get_decl_and_offset (incoming, &decl, &offset))
     {
+      incoming_ok = false;
       if (MEM_P (incoming))
 	{
 	  /* This means argument is passed by invisible reference.  */
@@ -9861,6 +9863,10 @@ vt_add_function_parameter (tree parm)
     {
       int i;
 
+      /* The following code relies on vt_get_decl_and_offset returning true for
+	 incoming, which might not be always the case.  */
+      if (!incoming_ok)
+	return;
       for (i = 0; i < XVECLEN (incoming, 0); i++)
 	{
 	  rtx reg = XEXP (XVECEXP (incoming, 0, i), 0);