[Bug tree-optimization/93745] Redundant store not eliminated with intermediate instruction

[amonakov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93745

Alexander Monakov <amonakov at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |amonakov at gcc dot gnu.org

--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
The store cannot be eliminated with GCC's memory model where stores through a
pointer can change dynamic type.

The extra load you mention can be optimized because if *p and d overlap,
attempt to load from a 'double' stored value via an 'int *' would have invoked
undefined behavior.