commit b9e703f0b42b2a86c9e18cd12497a0c19d2eb96c
author Richard Biener <rguenther@suse.de> Mon Sep 22 10:14:31 2025 +0200
committer Richard Biener <rguenther@suse.de> Wed Sep 24 10:36:18 2025 +0200
tree 08a5dc769815ea6b12a8ab7483b542d4e8e4c6e4
parent 732c0a78740860340c58f32bab5bf215d9032007

tree-optimization/122016 - PRE insertion breaks abnormal coalescing

When PRE asks VN to simplify a NARY but not insert, that bypasses
the abnormal guard in maybe_push_res_to_seq and we blindly accept
new uses of abnormals.  The following fixes this.

	PR tree-optimization/122016
	* tree-ssa-sccvn.cc (vn_nary_simplify): Do not use the
	simplified expression when it references abnormals.

	* gcc.dg/torture/pr122016.c: New testcase.

(cherry picked from commit 52b53cfb5392257536fce8dd22ea60412ceaee7d)