From 086031c058598512d09bf898e4db3735b3e1f22c Mon Sep 17 00:00:00 2001
From: Alex Coplan <alex.coplan@arm.com>
Date: Mon, 24 Jun 2024 13:54:48 +0100
Subject: [PATCH] vect: Also cost gconds for scalar [PR118211]
Currently we only cost gconds for the vector loop while we omit costing
them when analyzing the scalar loop; this unfairly penalizes the vector
loop in the case of loops with early exits.
This (together with the previous patches) enables us to vectorize
std::find with 64-bit element sizes.
gcc/ChangeLog:
PR tree-optimization/118211
PR tree-optimization/116126
* tree-vect-loop.cc (vect_compute_single_scalar_iteration_cost):
Don't skip over gconds.
---
gcc/tree-vect-loop.cc | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index bb1138bfcfba..edd7d4d87630 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -1688,7 +1688,9 @@ vect_compute_single_scalar_iteration_cost (loop_vec_info loop_vinfo)
gimple *stmt = gsi_stmt (si);
stmt_vec_info stmt_info = loop_vinfo->lookup_stmt (stmt);
- if (!is_gimple_assign (stmt) && !is_gimple_call (stmt))
+ if (!is_gimple_assign (stmt)
+ && !is_gimple_call (stmt)
+ && !is_a<gcond *> (stmt))
continue;
/* Skip stmts that are not vectorized inside the loop. */
--
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