[PUSHED 2/2] ifcvt: Move noce_try_cond_zero_arith last

Andrew Pinski andrew.pinski@oss.qualcomm.com
Wed Dec 24 01:44:26 GMT 2025


I noticed that on x86_64 and aarch64, noce_try_cond_zero_arith
would produce worse code than noce_try_cmove_arith.
So we should do noce_try_cond_zero_arith last instead
of before noce_try_cmove_arith.

Pushed as obvious after bootstrap/test on x86_64-linux-gnu.
Also checked to make sure riscv testcases still work.

gcc/ChangeLog:

	* ifcvt.cc (noce_process_if_block): Move noce_try_cond_zero_arith
	last.

Signed-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>
---
 gcc/ifcvt.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/ifcvt.cc b/gcc/ifcvt.cc
index 75d959f652c..97033aad482 100644
--- a/gcc/ifcvt.cc
+++ b/gcc/ifcvt.cc
@@ -4404,14 +4404,14 @@ noce_process_if_block (struct noce_if_info *if_info)
 	goto success;
       if (noce_try_store_flag_mask (if_info))
 	goto success;
-      if (HAVE_conditional_move
-          && noce_try_cond_zero_arith (if_info))
-	goto success;
       if (HAVE_conditional_move
 	  && noce_try_cmove_arith (if_info))
 	goto success;
       if (noce_try_sign_mask (if_info))
 	goto success;
+      if (HAVE_conditional_move
+          && noce_try_cond_zero_arith (if_info))
+	goto success;
     }
 
   if (!else_bb && set_b)
-- 
2.43.0



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