re PR target/79570 (ICE in sel-sched-ir.c:4534 in pr69956.c)

	PR target/79570
	* sel-sched.c (moveup_expr_cached): Don't call sel_bb_head
	on temporarily removed DEBUG_INSNs.

	* gcc.dg/pr79570.c: New test.

From-SVN: r245633

gcc/ChangeLog

 2017-02-21  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/79570
+	* sel-sched.c (moveup_expr_cached): Don't call sel_bb_head
+	on temporarily removed DEBUG_INSNs.
+
 	PR tree-optimization/79649
 	* tree-loop-distribution.c (classify_partition): Give up on
 	non-generic address space loads/stores.

gcc/sel-sched.c

@@ -2529,6 +2529,7 @@ moveup_expr_cached (expr_t expr, insn_t insn, bool inside_insn_group)
     }
 
   if (DEBUG_INSN_P (EXPR_INSN_RTX (expr))
+      && BLOCK_FOR_INSN (EXPR_INSN_RTX (expr))
       && (sel_bb_head (BLOCK_FOR_INSN (EXPR_INSN_RTX (expr)))
 	  == EXPR_INSN_RTX (expr)))
     /* Don't use cached information for debug insns that are heads of

gcc/testsuite/ChangeLog

 2017-02-21  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/79570
+	* gcc.dg/pr79570.c: New test.
+
 	PR c++/79641
 	* c-c++-common/pr79641.c: New test.
 

gcc/testsuite/gcc.dg/pr79570.c

+/* PR target/79570 */
+/* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fselective-scheduling2 -fvar-tracking-assignments" } */
+/* { dg-warning "changes selective scheduling" "" { target *-*-* } 0 } */
+
+#include "pr69956.c"