re PR rtl-optimization/34085 (ICE with -freorder-blocks-and-partition)

Fix PR rtl-optimization/34085

Co-Authored-By: Revital Eres <eres@il.ibm.com>

From-SVN: r130435

gcc/ChangeLog

+2007-11-26  Steven Bosscher  <stevenb.gcc@gmail.com> 
+	    Revital Eres  <eres@il.ibm.com> 
+
+	PR middle-end/34085
+	* bb-reorder.c (insert_section_boundary_note): Clear
+	BLOCK_FOR_INSN in NOTE_INSN_SWITCH_TEXT_SECTIONS.
+
 2007-11-26  Richard Sandiford  <rsandifo@nildram.co.uk>
 
 	* config/mips/elfoabi.h (DRIVER_SELF_SPECS): Add missing comma.

gcc/bb-reorder.c

@@ -1947,6 +1947,9 @@ insert_section_boundary_note (void)
 	{
 	  new_note = emit_note_before (NOTE_INSN_SWITCH_TEXT_SECTIONS,
 				       BB_HEAD (bb));
+	  /* ??? This kind of note always lives between basic blocks,
+	     but add_insn_before will set BLOCK_FOR_INSN anyway.  */
+	  BLOCK_FOR_INSN (new_note) = NULL;
 	  break;
 	}
     }

gcc/testsuite/ChangeLog

+2007-11-26  Steven Bosscher  <stevenb.gcc@gmail.com>
+	    Revital Eres  <eres@il.ibm.com>
+
+	PR rtl-optimization/34085
+	* gcc.dg/tree-prof (bb-reorg.c): New test.
+
 2007-11-26  Richard Sandiford  <rsandifo@nildram.co.uk>
 
 	* lib/target-supports.exp (check_effective_target_mips_soft_float):

gcc/testsuite/gcc.dg/tree-prof/bb-reorg.c

+/* { dg-require-effective-target freorder } */
+/* { dg-options "-O2 -freorder-blocks-and-partition" } */
+
+#include <string.h>
+
+#define SIZE 1000
+int t0 = 0;
+const char *t2[SIZE];
+char buf[SIZE];
+
+void
+foo (void)
+{
+  char *s = buf;
+  t0 = 1;
+
+  for (;;)
+    {
+      if (*s == '\0')
+	break;
+      else
+	{
+	  t2[t0] = s;
+	  t0++;
+	}
+      *s++ = '\0';
+    }
+  t2[t0] = NULL;
+}
+
+
+int
+main ()
+{
+  strcpy (buf, "hello");
+  foo ();
+  return 0; 
+}
+