From cb06e4a961b85a06e666f03124f9bd0f99e79f8c Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Thu, 31 Jul 2025 13:04:49 +0200 Subject: [PATCH] tree-optimization/121323 - UBSAN error in ao_ref_init_from_ptr_and_range We should check the offset fits a HWI when multiplied to be in bits. PR tree-optimization/121323 * tree-ssa-alias.cc (ao_ref_init_from_ptr_and_range): Check the pointer offset fits in a HWI when represented in bits. (cherry picked from commit 0be8ffbc854410b65d45a72e843dc18b13fc7b0f) --- gcc/tree-ssa-alias.cc | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/gcc/tree-ssa-alias.cc b/gcc/tree-ssa-alias.cc index 9dd1780867d..f60ed09514e 100644 --- a/gcc/tree-ssa-alias.cc +++ b/gcc/tree-ssa-alias.cc @@ -901,7 +901,9 @@ ao_ref_init_from_ptr_and_range (ao_ref *ref, tree ptr, if (TREE_CODE (ptr) == ADDR_EXPR) { ref->base = get_addr_base_and_unit_offset (TREE_OPERAND (ptr, 0), &t); - if (ref->base) + if (ref->base + && coeffs_in_range_p (t, -HOST_WIDE_INT_MAX / BITS_PER_UNIT, + HOST_WIDE_INT_MAX / BITS_PER_UNIT)) ref->offset = BITS_PER_UNIT * t; else { -- 2.47.2