re PR rtl-optimization/61278 (ICE with LTO (lto-wrapper failed) on x86_64-linux-gnu in 64-bit mode)

ChangeLog:
2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	PR rtl-optimization/61278
	* shrink-wrap.c (move_insn_for_shrink_wrap): Check df_live.

testsuite/ChangeLog:
2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	* gcc.dg/lto/pr61278_0.c: New test.
	* gcc.dg/lto/pr61278_1.c: New test.

From-SVN: r210922

gcc/ChangeLog

-ChangeLog:
+2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
+
+	PR rtl-optimization/61278
+	* shrink-wrap.c (move_insn_for_shrink_wrap): Check df_live.
+
 2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
 
 	PR rtl-optimization/61220

gcc/shrink-wrap.c

@@ -213,8 +213,15 @@ move_insn_for_shrink_wrap (basic_block bb, rtx insn,
       if (EDGE_COUNT (bb->succs) == 1)
 	return false;
 
+      /* If DF_LIVE doesn't exist, i.e. at -O1, just give up.  */
+      if (!df_live)
+	return false;
+
       next_block = split_edge (live_edge);
 
+      /* We create a new basic block.  Call df_grow_bb_info to make sure
+	 all data structures are allocated.  */
+      df_grow_bb_info (df_live);
       bitmap_copy (df_get_live_in (next_block), df_get_live_out (bb));
       df_set_bb_dirty (next_block);
 

gcc/testsuite/ChangeLog

 2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
 
+	* gcc.dg/lto/pr61278_0.c: New test.
+	* gcc.dg/lto/pr61278_1.c: New test.
+
+2014-05-26  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
+
 	* gcc.dg/pr61220.c: New test.
 	* gcc.dg/shrink-wrap-loop.c: Disable for x86_64 -m32 mode.
 

gcc/testsuite/gcc.dg/lto/pr61278_0.c

+/* { dg-lto-do link } */
+/* { dg-lto-options { { -flto -O0 } } } */
+/* { dg-extra-ld-options " -flto -O1 " } */
+
+static unsigned int
+fn1 (int p1, int p2)
+{
+  return 0;
+}
+
+char a, b, c;
+
+char
+foo (char *p)
+{
+  int i;
+  for (b = 1 ; b > 0; b++)
+    {
+      for (i = 0; i < 2; i++)
+	;
+      for (a = 1; a > 0; a++)
+	{
+	  char d[1] = { 0 };
+	  if (*p)
+	    break;
+	  c ^= fn1 (fn1 (fn1 (0, 0), 0), 0);
+	}
+    }
+  return 0;
+}

gcc/testsuite/gcc.dg/lto/pr61278_1.c

+/* { dg-lto-do link } */
+/* { dg-lto-options { { -flto -O1 } } } */
+
+extern char foo (char *);
+
+char d;
+
+int
+main ()
+{
+  foo (&d);
+  return 0;
+}