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(parent: 5801090) | patch
[VPlan] Fix iterator invalidation in adjustFixedOrderRecurrences.
authorFlorian Hahn <flo@fhahn.com>
Mon, 13 Feb 2023 13:51:14 +0000 (13:51 +0000)
committerFlorian Hahn <flo@fhahn.com>
Mon, 13 Feb 2023 13:51:14 +0000 (13:51 +0000)
commitaf3c25dc3d871a7665610a819426c31d5eb17a03
tree639c871f717bbeb7f45d04c42d1e9576e0e4c0d0tree | snapshot
parent5801090258011cfe636cda1493ac9bc07fb2a889commit | diff
[VPlan] Fix iterator invalidation in adjustFixedOrderRecurrences.

adjustFixedOrderRecurrences may insert instructions after immediately
after the PHI nodes in the block. This invalidates the phis() iterator.
To avoid crashing/accessing invalid recipes, first collect all
first-order recurrence phi recipes.

This should fix a crash reported by @dmgreen after D142589 landed.
llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp diff | blob | history
llvm/test/Transforms/LoopVectorize/AArch64/first-order-recurrence-fold-tail.ll [new file with mode: 0644] blob
Domain: System / Toolchain;