From: Jeff Law <jeffreyalaw@gmail.com>
Date: Tue, 15 Jun 2021 16:42:42 +0000 (-0400)
Subject: Minor improvement to compare elimination
X-Git-Tag: basepoints/gcc-13~6828
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d43ec50966cafb339eb6a370a5d767a24f673e1;p=thirdparty%2Fgcc.git

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 85085cd69735..607eadc3d962 100644
--- 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 ());