re PR rtl-optimization/34132 (ICE: internal consistency failure (invalid rtl…

re PR rtl-optimization/34132 (ICE: internal consistency failure (invalid rtl sharing found in the insn))

	PR rtl-optimization/34132
	* gcse.c (try_replace_reg): Avoid rtx sharing between REG_EQUAL note
	and insn.

	* gcc.c-torture/compile/20071118-1.c: New test.

From-SVN: r130275

gcc/ChangeLog

 2007-11-18  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/34132
+	* gcse.c (try_replace_reg): Avoid rtx sharing between REG_EQUAL note
+	and insn.
+
 	PR middle-end/33335
 	* optabs.h (optab_table): Change type to struct optab from optab.
 	(convert_optab_table): Similarly.

gcc/gcse.c

@@ -2665,7 +2665,8 @@ try_replace_reg (rtx from, rtx to, rtx insn)
      with our replacement.  */
   if (note != 0 && REG_NOTE_KIND (note) == REG_EQUAL)
     set_unique_reg_note (insn, REG_EQUAL,
-			 simplify_replace_rtx (XEXP (note, 0), from, to));
+			 simplify_replace_rtx (XEXP (note, 0), from,
+			 copy_rtx (to)));
   if (!success && set && reg_mentioned_p (from, SET_SRC (set)))
     {
       /* If above failed and this is a single set, try to simplify the source of

gcc/testsuite/ChangeLog

+2007-11-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/34132
+	* gcc.c-torture/compile/20071118-1.c: New test.
+
 2007-11-18  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/31608

gcc/testsuite/gcc.c-torture/compile/20071118-1.c

+/* PR rtl-optimization/34132 */
+/* Testcase by Martin Michlmayr <tbm@cyrius.com> */
+
+static char *m = "%s%u.msg";
+extern void bar (int, const char *);
+void foo (short x, int y, int z)
+{
+  if (x == 0)
+    {
+      bar (y, m);
+      z = 1;
+    }
+  else if (x == 1)
+    z = 0;
+  bar (y, m);
+  bar (z, "%d");
+}