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3 Commits

Author SHA1 Message Date
Florian Hahn 9fd7a2e379
[ConstraintElimination] Use constraints with 0 or 1 coefficients. 
isConditionImplied is able to correctly handle 0 or 1 coefficients, so
let it handle those cases, rather than skipping them.
 2022-01-27 18:41:33 +00:00
Bjorn Pettersson 8ebb3eac02 [test] Use -passes syntax when specifying pipeline in some more tests 
The legacy PM is deprecated, so update a bunch of lit tests running
opt to use the new PM syntax when specifying the pipeline.
In this patch focus has been put on test cases for ConstantMerge,
ConstraintElimination, CorrelatedValuePropagation, GlobalDCE,
GlobalOpt, SCCP, TailCallElim and PredicateInfo.

Differential Revision: https://reviews.llvm.org/D114516
 2021-11-27 09:52:55 +01:00
Florian Hahn 4ceecc820b [ConstraintElimination] Handle constraints with all zero var coeffs. 
Constraints where all variable coefficients are 0 do not add any useful
information. When checking, we can check if they are always true/false.
 2020-12-05 12:06:53 +00:00