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Author SHA1 Message Date
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
Roman Lebedev c329a47d9e
[CVP] @llvm.abs() handling 
Iff we know the sigdness domain of the argument,
we can either skip @llvm.abs, or do negation directly.

Notably, INT_MIN can belong to either domain:
* X u<= INT_MIN --> X  is always fine
  https://alive2.llvm.org/ce/z/QB8j-C https://alive2.llvm.org/ce/z/7sFKpS
* X s<= 0 --> -X  is always fine
  https://alive2.llvm.org/ce/z/QbGSyq https://alive2.llvm.org/ce/z/APsN84

If all else fails, try to inferr NSW flag:
https://alive2.llvm.org/ce/z/qCJfYm
 2021-04-10 16:47:31 +03:00
Roman Lebedev b6aaa8836e
[NFC][CVP] Add `@llvm.abs` test cases 2021-04-10 16:47:31 +03:00