re PR middle-end/33029 (libgcc2.c:1890: internal compiler error: in…

re PR middle-end/33029 (libgcc2.c:1890: internal compiler error: in local_cprop_pass, at gcse.c:3236)

	PR middle-end/33029
	* lower-subreg.c (resolve_clobber): If we remove a REG_LIBCALL
	note, remove the associated REG_RETVAL note.

From-SVN: r128119

gcc/ChangeLog

+2007-09-04  Steven Bosscher  <steven@gcc.gnu.org>
+
+	PR middle-end/33029
+	* lower-subreg.c (resolve_clobber): If we remove a REG_LIBCALL
+	note, remove the associated REG_RETVAL note.
+
 2007-09-04  Andrew Pinski  <andrew_pinski@playstation.sony.com>
 
 	* config.gcc (powerpc*-*-*): Install
@@ -8463,7 +8469,6 @@
 	PR tree-optimization/19590
 	* tree-vrp.c (adjust_range_with_scev): Set the range when the result
 	of scev is a constant.
-	* gcc/testsuite/gcc.dg/tree-ssa/pr19590.c: New.
 
 2007-06-21  Kenneth Zadeck <zadeck@naturalbridge.com>
 

gcc/lower-subreg.c

@@ -897,7 +897,7 @@ resolve_simple_move (rtx set, rtx insn)
 static bool
 resolve_clobber (rtx pat, rtx insn)
 {
-  rtx reg;
+  rtx reg, note;
   enum machine_mode orig_mode;
   unsigned int words, i;
   int ret;
@@ -909,8 +909,10 @@ resolve_clobber (rtx pat, rtx insn)
   /* If this clobber has a REG_LIBCALL note, then it is the initial
      clobber added by emit_no_conflict_block.  We were able to
      decompose the register, so we no longer need the clobber.  */
-  if (find_reg_note (insn, REG_LIBCALL, NULL_RTX) != NULL_RTX)
+  note = find_reg_note (insn, REG_LIBCALL, NULL_RTX);
+  if (note != NULL_RTX)
     {
+      remove_retval_note (XEXP (note, 0));
       delete_insn (insn);
       return true;
     }