tree-object-size: Deterministic SSA generation [PR123351]

tree-object-size: Deterministic SSA generation [PR123351]

The order of evaluation of function arguments is unspecified in C++.
The function object_sizes_set_temp called object_sizes_set with two
calls to make_ssa_name() as arguments.  Since make_ssa_name() has the
side effect of incrementing the global SSA version counter, different
architectures of the same compiler evaluated these calls in different
orders.

This resulted in non-deterministic SSA version numbering between
x86_64 and aarch64 hosts during cross-compilation, leading to
divergent object files.

Sequencing the calls into separate statements ensures deterministic
evaluation order.

2026-01-06  Jakub Jelinek  <jakub@redhat.com>
	    Marco Falke  <falke.marco@gmail.com>

	PR tree-optimization/123351
	* tree-object-size.cc (object_sizes_set_temp): Separate calls to
	make_ssa_name to ensure deterministic execution order.