commit 7c99de1c439dbb149cc6a33a214f22f2df1c88f3
author Richard Biener <rguenther@suse.de> Fri Aug 01 15:07:15 2025 +0200
committer Richard Biener <rguenther@suse.de> Sun Aug 03 09:25:46 2025 +0200
tree 0759376a526e736b011704274d3df61049d4e041
parent 94edbc153ae4f1c1532859836e528fc480da82d6

tree-optimization/90242 - UBSAN error in vn_reference_compute_hash

The following plugs possible overflow issues in vn_reference_compute_hash
and possibly in vn_reference_eq.  The inchash "integer" adds are a bit
of a mess, but I know overloads with different integer types can get
messy, so not this time.  For hashing simply truncate to 64bits.

	PR tree-optimization/90242
	* tree-ssa-sccvn.cc (vn_reference_compute_hash): Use
	poly_offset_int for offset accumulation.  For hashing
	truncate to 64 bits and also hash 64 bits.
	(vn_reference_eq): Likewise.