From: Richard Biener <rguenther@suse.de>
Date: Thu, 15 Feb 2024 09:52:09 +0000 (+0100)
Subject: Do not record dependences from debug stmts in tail merging
X-Git-Tag: basepoints/gcc-15~1135
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab5fb0f99313a7d1204a82c5aeb6748d98c7fb0f;p=thirdparty%2Fgcc.git

Do not record dependences from debug stmts in tail merging

The following avoids recording BB dependences for debug stmt uses.

	* tree-ssa-tail-merge.cc (same_succ_hash): Skip debug
	stmts.
---

diff --git a/gcc/tree-ssa-tail-merge.cc b/gcc/tree-ssa-tail-merge.cc
index f4e6ae6e8a2a..c8b4a79294d7 100644
--- a/gcc/tree-ssa-tail-merge.cc
+++ b/gcc/tree-ssa-tail-merge.cc
@@ -474,6 +474,9 @@ same_succ_hash (const same_succ *e)
        !gsi_end_p (gsi); gsi_next_nondebug (&gsi))
     {
       stmt = gsi_stmt (gsi);
+      if (is_gimple_debug (stmt))
+	continue;
+
       stmt_update_dep_bb (stmt);
       if (stmt_local_def (stmt))
 	continue;