[gcc r13-29] tree-optimization/104322 - remove dead code in vectorizable_reduction

[gcc r13-29] tree-optimization/104322 - remove dead code in vectorizable_reduction

[Richard Biener]

https://gcc.gnu.org/g:7259481f0ece6283a6e2943448e8d28ffffc40f9

commit r13-29-g7259481f0ece6283a6e2943448e8d28ffffc40f9
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Feb 1 11:32:11 2022 +0100

    tree-optimization/104322 - remove dead code in vectorizable_reduction
    
    The PR points out dead code after previous refactoring.
    
    2022-02-01  Richard Biener  <rguenther@suse.de>
    
            PR tree-optimization/104322
            * tree-vect-loop.cc (vectorizable_reduction): Remove dead code.

Diff:
---
 gcc/tree-vect-loop.cc | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index f53a634a390..ab7dade1c74 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -6634,19 +6634,14 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
 	 need it to get at the number of vector stmts which wasn't
 	 yet initialized for the instance root.  */
     }
-  if (STMT_VINFO_DEF_TYPE (stmt_info) == vect_reduction_def)
-    stmt_info = vect_stmt_to_vectorize (STMT_VINFO_REDUC_DEF (stmt_info));
-  else
+  if (STMT_VINFO_DEF_TYPE (stmt_info) == vect_double_reduction_def)
     {
-      gcc_assert (STMT_VINFO_DEF_TYPE (stmt_info)
-		  == vect_double_reduction_def);
       use_operand_p use_p;
       gimple *use_stmt;
       bool res = single_imm_use (gimple_phi_result (stmt_info->stmt),
 				 &use_p, &use_stmt);
       gcc_assert (res);
       phi_info = loop_vinfo->lookup_stmt (use_stmt);
-      stmt_info = vect_stmt_to_vectorize (STMT_VINFO_REDUC_DEF (phi_info));
     }
 
   /* PHIs should not participate in patterns.  */