revert: re PR rtl-optimization/16590 (Incorrect execution when compiling with -O2)

	Revert:
	2004-08-29  Mark Mitchell  <mark@codesourcery.com>
	PR rtl-optimization/16590
	* gcse.c (pre_delete): Do not create invalid REG_EQUAL notes.

	* g++.dg/opt/loop1.C: XFAIL.

From-SVN: r86820

gcc/ChangeLog

+2004-08-30  Mark Mitchell  <mark@codesourcery.com>
+
+	Revert:
+	2004-08-29  Mark Mitchell  <mark@codesourcery.com>
+	PR rtl-optimization/16590
+	* gcse.c (pre_delete): Do not create invalid REG_EQUAL notes.
+
 2004-08-30  Andrew Pinski  <apinski@apple.com>
 
 	* hard-reg-set.h: 

gcc/gcse.c

@@ -4463,9 +4463,7 @@ pre_delete (void)
 		  expr->reaching_reg
 		    = gen_reg_rtx (GET_MODE (SET_DEST (set)));
 
-		emit_insn_after (gen_move_insn (SET_DEST (set), 
-						expr->reaching_reg), 
-				 insn);
+		gcse_emit_move_after (expr->reaching_reg, SET_DEST (set), insn);
 		delete_insn (insn);
 		occr->deleted_p = 1;
 		SET_BIT (pre_redundant_insns, INSN_CUID (insn));

gcc/testsuite/ChangeLog

+2004-08-30  Mark Mitchell  <mark@codesourcery.com>
+
+	* g++.dg/opt/loop1.C: XFAIL.
+
 2004-08-30  Geoffrey Keating  <geoffk@apple.com>
 
 	* gcc.dg/funcdef-storage-1.c: New.

gcc/testsuite/g++.dg/opt/loop1.C

 // PR rtl-optimization/16590
-// { dg-do run }
+// { dg-do run { xfail *-*-* } }
 // { dg-options "-O2" }
 
 extern "C" void abort();