sel-sched: update liveness in redirect_edge_and_branch hooks (PR 86928)

2019-04-01  Andrey Belevantsev  <abel@ispras.ru>

	PR rtl-optimization/86928
	* sel-sched-ir.c (sel_redirect_edge_and_branch_force): Invoke
	compute_live if necessary.
	(sel_redirect_edge_and_branch): Likewise.

	* gcc.dg/pr86928.c: New test.

From-SVN: r270061

gcc/ChangeLog

+2019-04-01  Andrey Belevantsev  <abel@ispras.ru>
+
+	PR rtl-optimization/86928
+	* sel-sched-ir.c (sel_redirect_edge_and_branch_force): Invoke
+	compute_live if necessary.
+	(sel_redirect_edge_and_branch): Likewise.
+
 2019-04-01  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/89865

gcc/sel-sched-ir.c

@@ -5637,6 +5637,8 @@ sel_redirect_edge_and_branch_force (edge e, basic_block to)
 			   recompute_dominator (CDI_DOMINATORS, to));
   set_immediate_dominator (CDI_DOMINATORS, orig_dest,
 			   recompute_dominator (CDI_DOMINATORS, orig_dest));
+  if (jump && sel_bb_head_p (jump))
+    compute_live (jump);
 }
 
 /* A wrapper for redirect_edge_and_branch.  Return TRUE if blocks connected by
@@ -5697,6 +5699,8 @@ sel_redirect_edge_and_branch (edge e, basic_block to)
       set_immediate_dominator (CDI_DOMINATORS, orig_dest,
                                recompute_dominator (CDI_DOMINATORS, orig_dest));
     }
+  if (jump && sel_bb_head_p (jump))
+    compute_live (jump);
   return recompute_toporder_p;
 }
 

gcc/testsuite/ChangeLog

 2019-04-01  Andrey Belevantsev  <abel@ispras.ru>
 
+	PR rtl-optimization/86928
+	* gcc.dg/pr86928.c: New test.
+
+2019-04-01  Andrey Belevantsev  <abel@ispras.ru>
+
 	PR rtl-optimization/87273
 	* gcc.dg/pr87273.c: New test.
 

gcc/testsuite/gcc.dg/pr86928.c

+/* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fnon-call-exceptions -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops -fselective-scheduling -fno-if-conversion -fno-tree-dce -w" } */
+/* { dg-additional-options "-m32" { target powerpc*-*-* } } */
+
+int kn;
+
+void
+gd (short int sk)
+{
+  char *as;
+
+  while (sk < 1)
+    {
+      char *ci;
+
+      if (*ci == 0)
+        *as += ci;
+
+      for (kn = 0; kn < 18; ++kn)
+        {
+        }
+
+      ++sk;
+    }
+}