[gcc r15-2311] tree-optimization/116081 - typedef vs. non-typedef in vectorization

[Richard Biener via Gcc-cvs]

https://gcc.gnu.org/g:3f578dbac726d47b043b82606c47e5676c5d6a14

commit r15-2311-g3f578dbac726d47b043b82606c47e5676c5d6a14
Author: Richard Biener <rguent...@suse.de>
Date:   Thu Jul 25 12:46:30 2024 +0200

    tree-optimization/116081 - typedef vs. non-typedef in vectorization
    
    The following fixes the code generation difference when using
    a typedef for the scalar type.  The issue is using a pointer
    equality test for an INTEGER_CST which fails when the types
    are different variants.
    
            PR tree-optimization/116081
            * tree-vect-loop.cc (get_initial_defs_for_reduction):
            Use operand_equal_p for comparing the element with the
            neutral op.

Diff:
---
 gcc/tree-vect-loop.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index d7d628efa60f..856ce491c3ec 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -5652,7 +5652,7 @@ get_initial_defs_for_reduction (loop_vec_info loop_vinfo,
              init = gimple_build_vector_from_val (&ctor_seq, vector_type,
                                                   neutral_op);
              int k = nunits;
-             while (k > 0 && elts[k - 1] == neutral_op)
+             while (k > 0 && operand_equal_p (elts[k - 1], neutral_op))
                k -= 1;
              while (k > 0)
                {