From: Richard Biener <rguenther@suse.de>
Date: Thu, 9 Mar 2023 09:56:57 +0000 (+0100)
Subject: Avoid unnecessary epilogues from tree_unroll_loop
X-Git-Tag: basepoints/gcc-15~10071
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=01e79e21bbb2d10ecac784d383cefb88d2e20692;p=thirdparty%2Fgcc.git

Avoid unnecessary epilogues from tree_unroll_loop

The following fixes the condition determining whether we need an
epilogue.

	* tree-ssa-loop-manip.cc (determine_exit_conditions): Fix
	no epilogue condition.
---

diff --git a/gcc/tree-ssa-loop-manip.cc b/gcc/tree-ssa-loop-manip.cc
index 09acc1c94cce..4ef27bae5152 100644
--- a/gcc/tree-ssa-loop-manip.cc
+++ b/gcc/tree-ssa-loop-manip.cc
@@ -1010,7 +1010,7 @@ determine_exit_conditions (class loop *loop, class tree_niter_desc *desc,
       /* Convert the latch count to an iteration count.  */
       tree niter = fold_build2 (PLUS_EXPR, type, desc->niter,
 				build_one_cst (type));
-      if (multiple_of_p (type, niter, bigstep))
+      if (multiple_of_p (type, niter, build_int_cst (type, factor)))
 	return;
     }