optabs.c (prepare_float_lib_cmp): Always attach a REG_EQUAL note to the comparison...

	* optabs.c (prepare_float_lib_cmp): Always attach a REG_EQUAL note
	to the comparison, as emit_libcall_block calls copy_rtx on equiv.

From-SVN: r72262

gcc/ChangeLog

+2003-10-09  Roger Sayle  <roger@eyesopen.com>
+
+	* optabs.c (prepare_float_lib_cmp): Always attach a REG_EQUAL note
+	to the comparison, as emit_libcall_block calls copy_rtx on equiv.
+
 2003-10-09  Dorit Naishlos  <dorit@il.ibm.com>
 
 	* haifa-sched.c (ok_for_early_schedule): New function.

gcc/optabs.c

@@ -3871,13 +3871,9 @@ prepare_float_lib_cmp (rtx *px, rtx *py, enum rtx_code *pcomparison,
       y = convert_to_mode (mode, y, 0);
     }
 
-  /* If we're optimizing attach a REG_EQUAL note describing the semantics
-     of the libcall to the RTL.  The allows the RTL optimizers to delete
-     the libcall if the condition can be determined at compile-time.  */
-  if (optimize
-      && ! side_effects_p (x)
-      && ! side_effects_p (y))
-    {
+  /* Attach a REG_EQUAL note describing the semantics of the libcall to
+     the RTL.  The allows the RTL optimizers to delete the libcall if the
+     condition can be determined at compile-time.  */
   if (comparison == UNORDERED)
     {
       rtx temp = simplify_gen_relational (NE, word_mode, mode, x, x);
@@ -3927,14 +3923,10 @@ prepare_float_lib_cmp (rtx *px, rtx *py, enum rtx_code *pcomparison,
 	    default:
 	      abort ();
 	    }
-	      equiv = simplify_gen_ternary (IF_THEN_ELSE, word_mode,
-					    word_mode, equiv,
-					    true_rtx, false_rtx);
-	    }
+	  equiv = simplify_gen_ternary (IF_THEN_ELSE, word_mode, word_mode,
+					equiv, true_rtx, false_rtx);
 	}
     }
-  else
-    equiv = NULL_RTX;
 
   start_sequence ();
   value = emit_library_call_value (libfunc, NULL_RTX, LCT_CONST,