Minor improvement to compare elimination

gcc/
	* compare-elim.c (try_eliminate_compare): Run DCE to clean things
	up before eliminating comparisons.

diff --git a/gcc/compare-elim.c b/gcc/compare-elim.c
index 85085cd69735bdcdac697bebbe1450299bd0466a..607eadc3d96272e07065a64270f25caf70e49ce3 100644 (file)
--- a/gcc/compare-elim.c
+++ b/gcc/compare-elim.c
@@ -906,6 +906,7 @@ try_eliminate_compare (struct comparison *cmp)
 static unsigned int
 execute_compare_elim_after_reload (void)
 {
+  df_set_flags (DF_LR_RUN_DCE);
   df_analyze ();
 
   gcc_checking_assert (!all_compares.exists ());