From: Richard Biener <rguenther@suse.de>
Date: Tue, 3 Jun 2025 12:09:22 +0000 (+0200)
Subject: tree-optimization/120517 - fix dataref group split math
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f605165ee4baf65a46a16692e3aaa13046cbd283;p=thirdparty%2Fgcc.git

tree-optimization/120517 - fix dataref group split math

DR_INIT is already measured in bytes, so there's no need to multiply
the DR_INIT difference of two DRs by the size of one of the DRs when
comparing that difference against MAX_BITSIZE_MODE_ANY_MODE.

	PR tree-optimization/120517
	* tree-vect-data-refs.cc (vect_analyze_data_ref_accesses):
	Fix math in dataref group split.
---

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index f2deb751ed9..1792ee4ea05 100644
--- a/gcc/tree-vect-data-refs.cc
+++ b/gcc/tree-vect-data-refs.cc
@@ -3685,7 +3685,7 @@ vect_analyze_data_ref_accesses (vec_info *vinfo,
 	      /* For datarefs with big gap, it's better to split them into different
 		 groups.
 		 .i.e a[0], a[1], a[2], .. a[7], a[100], a[101],..., a[107]  */
-	      if ((unsigned HOST_WIDE_INT)(init_b - init_prev) * tree_to_uhwi (szb)
+	      if ((unsigned HOST_WIDE_INT)(init_b - init_prev)
 		  > MAX_BITSIZE_MODE_ANY_MODE / BITS_PER_UNIT)
 		break;