Evgenii Kudriashov a242880371 [TableGen][GlobalISel] Reorder atomic predicate to preserve the order (#121806) ...

Since there are no opcodes for atomic loads and stores comparing to
SelectionDAG, we add `CheckMMOIsNonAtomic` predicate immediately after
the opcode predicate to make a logical combination of them. Otherwise
when `IPM_AtomicOrderingMMO` is inserted after `IPM_GenericPredicate`,
the patterns without predicates get a higher priority as
`IPM_AtomicOrderingMMO` has higher priority than `IPM_GenericPredicate`.

This is important to preserve an order of aligned/unaligned patterns on
X86 because aligned memory operations have an additional alignment
predicate and should be checked first according to their placement in td
file.

Closes #121446

2025-01-16 17:06:21 +01:00

96 KiB

Raw Blame History

View Raw