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* [gcc r12-1485] Minor improvement to compare elimination
@ 2021-06-15 16:43 Jeff Law
  0 siblings, 0 replies; only message in thread
From: Jeff Law @ 2021-06-15 16:43 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:6d43ec50966cafb339eb6a370a5d767a24f673e1

commit r12-1485-g6d43ec50966cafb339eb6a370a5d767a24f673e1
Author: Jeff Law <jeffreyalaw@gmail.com>
Date:   Tue Jun 15 12:42:42 2021 -0400

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

Diff:
---
 gcc/compare-elim.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/compare-elim.c b/gcc/compare-elim.c
index 85085cd6973..607eadc3d96 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 ());


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