From d5d43dc399bb0f15084827c59a025189c630afdd Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Tue, 23 Jan 2024 12:53:04 +0100 Subject: [PATCH] tree-optimization/113552 - fix num_call accounting in simd clone vectorization The following avoids using exact_log2 on the number of SIMD clone calls to be emitted when vectorizing calls since that can easily be not a power of two in which case it will return -1. For different simd clones the number of calls will differ by a multiply with a power of two only so using floor_log2 is good enough here. PR tree-optimization/113552 * tree-vect-stmts.cc (vectorizable_simd_clone_call): Use floor_log2 instead of exact_log2 on the number of calls. --- gcc/tree-vect-stmts.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc index 09749ae3817..1dbe1115da4 100644 --- a/gcc/tree-vect-stmts.cc +++ b/gcc/tree-vect-stmts.cc @@ -4071,7 +4071,7 @@ vectorizable_simd_clone_call (vec_info *vinfo, stmt_vec_info stmt_info, || (nargs != simd_nargs)) continue; if (num_calls != 1) - this_badness += exact_log2 (num_calls) * 4096; + this_badness += floor_log2 (num_calls) * 4096; if (n->simdclone->inbranch) this_badness += 8192; int target_badness = targetm.simd_clone.usable (n);